2000 Data Report Gunpowder River, Patapsco/Back River West Chesapeake Bay and Pat uxent River Watersheds

Gunpowder River Basin

Patapsco /Back River Basin

Patuxent River Basin West Chesapeake Bay Basin

TABLE OF CONTENTS

INTRODUCTION...... 3 GUNPOWDER RIVER SUB-BASIN ...... 9 GUNPOWDER RIVER...... 10 LOWER BIG GUNPOWDER FALLS ...... 16 BIRD RIVER...... 22 LITTLE GUNPOWDER FALLS ...... 28 MIDDLE RIVER – BROWNS...... 34 PATAPSCO RIVER SUB-BASIN...... 41 BACK RIVER ...... 43 BODKIN CREEK ...... 49 JONES FALLS ...... 55 GWYNNS FALLS ...... 65 PATAPSCO RIVER – LOWER NORTH BRANCH...... 75 LIBERTY RESERVOIR ...... 85 SOUTH BRANCH PATAPSCO RIVER...... 96 WEST CHESAPEAKE AREA...... 103 MAGOTHY RIVER ...... 104 SEVERN RIVER...... 110 SOUTH RIVER...... 116 WEST RIVER ...... 122 PATUXENT RIVER SUB-BASIN ...... 129 UPPER, LOWER PATUXENT RIVER AND WESTERN BRANCH MONITORING STATIONS .. 131 LITTLE PATUXENT RIVER...... 137 MIDDLE PATUXENT RIVER...... 148 ROCKY GORGE DAM...... 154 BRIGHTON DAM...... 160

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 2 Document version: August 22, 2007 Introduction

Section 303(d) of the federal Clean Water Act directs states to identify and list waters, known as water quality limited segments (WQLSs), for which technology-based effluent controls of a specified substance are inadequate to achieve water quality standards (40 Code of Federal Regulations 130.7(b)(i - iii)). For each WQLS each state must establish a Total Maximum Daily Load (TMDL). A TMDL is an estimate of the maximum amount of the pollutant that a waterbody can assimilate and still meet water quality standards.

As a coordinating framework for Maryland’s TMDL program, the Maryland Department of the Environment has developed a watershed cycling approach. This approach focuses on protecting Maryland’s water quality by developing and implementing TMDLs in a comprehensive fashion by drainage basin (watershed). By adopting watersheds as the primary management units, MDE addresses the appropriate natural spatial domain and is able to consolidate the necessary resources with sufficient spatial focus. This report compiles data collected in 2000 from Maryland’s Upper And Lower Western Shores, Patapsco/Back and Patuxent River Basins.

Maryland’s Watershed Cycling Strategy

Under the watershed cycling strategy, the State is divided into five regions. Monitoring activities are cycled through these regions over a five-year period (Figure 1). (The cycling process was initiated in the Lower Delmarva Peninsula region in 1998.) This approach allows a significant amount of resources to be concentrated in 20% of the State at any given time increasing resource efficiency and water quality evaluation intensity.

In each region, MDE collects water quality data for three wet periods (March, April, May) and three dry periods (July, August, September) for use in estimating watershed model loading rates and for water quality model calibration and validation. Note that these data collection efforts currently focus on characterizing the waterbody systems (flow, geometry, etc.) and water quality attributes associated with eutrophication problems (i.e., over- enrichment with nutrients, causing excessive algal growth leading to loss of water clarity and the potential for low dissolved oxygen levels).

The State’s watershed cycling strategy establishes a natural evaluation framework. As the cycle is completed for a given watershed, field monitoring will be repeated where it was conducted five-years before. This will provide an opportunity to assess the initial results of the TMDL and implementation activities. This watershed cycling framework is endorsed by the federal Environmental Protection Agency (EPA). A similar framework is used by many other states (e.g., Delaware has been using a similar approach for about 4 years).

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 3 Document version: August 22, 2007 2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 4

Document version: August 22, 2007 Data Collection Methodology

Field: A network of monitoring sites located on all major tributaries in each watershed was sampled during both high and low flow periods by MDE’s Field Monitoring Program to obtain a broad characterization of water quality conditions. Measurements of stream flow were made at the time of each sampling event, using either U.S. Geological Survey gages or in-situ measurements of flow velocity and cross-sectional area.

Laboratory: Standard laboratory methods were used to analyze samples for the constituents included above. All collections are discrete grab samples interval collections using multiple laboratories. Nutrient chemistry is analyzed by the University of Maryland, Chesapeake Biological Laboratory, using their protocols. BOD5, active chlorophyll a, pheophytin are analyzed by the Department of Health and Mental Hygiene. Physical in-situ measurements are done for water and air temperature, dissolved oxygen, conductivity, salinity and pH. Flows are measured at all free flowing “watershed” sites using standard hydrological techniques, primarily the stream segmentation method.

Data Management: The monitoring effort was coordinated with parallel data management activities. The data collected in the field was assembled and verified using standard software maintained for this purpose by the MDE-TARSA Computer Modeling Program. After the data has gone through data QA/QC process it is archived in SAS data sets for future use.

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 5 Document version: August 22, 2007

Table 1: Key Parameters Ascertained by Monitoring within the Watershed Cycling Strategy

Parameter Units Total Organic Carbon mg/l as C Dissolved Organic Carbon filtered mg/as C Particulate Carbon mg/l as C Total Suspended Solids mg/l N Total Dissolved Nitrogen filtered mg/l as N Particulate Nitrogen filtered mg/l as N Ammonia mg/l as N Nitrate and Nitrite filtered mg/l as N Nitrite filtered mg/l N Total Phosphorus mg/l as P Dissolved Phosphorus mg/l as P Orthophosphate mg/l as P Particulate Phosphorus mg/l as P Particulate Inorganic Phosphorus mg/l as P Silicate mg/l BOD 5 day1 mg/l Chlorophyll a mg/l Secchi Depth m pH std unit Dissolved Oxygen mg/l Conductivity ms/cm

1 BOD was not collected at all stations because of lab constraints. 2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 6 Document version: August 22, 2007 Report Organization

The report is organized by geographic region delineated by four major drainage basins. The Upper Western Shore drainage basin consists of the Gunpowder River, Lower Gunpowder Falls, Bird River, Little Gunpowder Falls and Middle River-Browns. The Patapsco River/Back drainage basin consists of Back River, Bodkin Creek, Baltimore Harbor, Jones and Gwynn Falls, Patapsco River Lower and North Branch, Liberty Reservoir and South Branch Patapsco. The Lower Western Shore drainage basin consists of the Magothy, Severn, South and West Rivers. And the Patuxent drainage basin consists of the Patuxenet River Middle, Western Branch and the Patuxent River Upper, the Little and Middle Patuxent Rivers, and the Rocky Gorge and Brighton Dams. (see cover page). The cover page shows the smaller 8-digit basins contained within the larger 6-digit basins for which data was collected. This organization is reflected in the Table of Contents.

For each 8-digit basin there is a map with stations, graphical presentations of data, and a station description list. The graphs include the parameters of most interest: chlorophyll a, dissolved oxygen, total suspended solids, BOD, dissolved inorganic nitrogen, dissolved inorganic phosphorus, total nitrogen and total phosphorus. Data is presented for the mainstem of the river, high flow (January-May) first and then low flow (July-October) followed by the same presentation for the tributaries. The graphs present data from the mouth of the water body progressively upstream. The data available in STORET at http://www.epa.gov/storet.

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 7 Document version: August 22, 2007

Gunpowder River Watershed

Gunpowder River

Lower Gunpowder Falls

Bird River

Little Gunpowder Falls

Middle River - Browns

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 8 Document version: August 22, 2007 Gunpowder River Sub-Basin (Sub-basin 02-13-08)

General Description (from 1998, 305 (b) Report) Water quality at the ambient water quality monitoring stations on the non-tidal Gunpowder River above and below Prettyboy and Loch Raven Reservoirs and water quality data from the MBSS program showed that water quality criteria were not exceeded and no use impairments were noted.

Two areas of use impairment were reported in the estuarine portion of the Bush River watershed. The Baltimore County Health Department reported on a three-month long closure in the Miami Beach/Bowley's Quarters area of Middle River because of excessive bacterial levels due to high waterfowl densities in the area. A study of ambient toxicity in Middle River identified nickel and copper as the source of impacts observed near Wilson Point.

There are two significant, publicly-owned impoundments in this basin, both of which are part of a drinking water supply reservoir for the Baltimore metropolitan area. Loch Raven Reservoir (2,400.0 acres) and Prettyboy Reservoir (1,500.0 acres) are located on the mainstem Gunpowder River. Both reservoirs are listed as having some partial use impairment as a result of low oxygen levels in the deeper portions of these lakes. The source of the hypoxic conditions there is considered to be a result of accelerated eutrophication due to nutrients entering the lake from the watershed (source unknown) and excessive sediment-oxygen demand by bacteria in the organic - rich sediments.

Water Quality Summary Nutrient impairments to water quality in the Lower Gunpowder Falls (02130802), the Little Gunpowder Falls (02130804) and the Gunpowder River will be addressed at a future date. Middle River-Browns (02130807) will be addressed by a cooperative effort by the Bay States, with the EPA Chesapeake Bay Program taking the lead. A Water Quality Analysis indicating no nutrient impairments in the Bird River (02130803) received a concurrence from EPA on May 5, 2005.

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 9 Document version: August 22, 2007 Gunpowder River

Gunpowder River Monitoring Stations

Map Prepared by the Maryland Department of the Environment Science Services Administration Montgomery Park Business Center 1800 Washington Boulevard, Suite 540 Baltimore, Maryland 21230-1718

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 10 Document version: August 22, 2007 Gunpowder River High Flow Conditions (December-May) Stations are presented from left to right from downstream to upstream

Chlorophyll a Dissolved Oxygen

60 20

45 15

30 10 µg/liter mg/liter 15 5

0 0 Route 6 Battery Point Mid-River FG 13 Route 6 Battery Point Mid-River FG 13

XIG8816 XIF9996 XJG0410 XJF2500 XIG8816 XIF9996 XJG0410 XJF2500

Total Suspended Solids Biological Oxygen Demand

100 12

75 9

50 6 mg/liter mg/liter 25 3

0 0 Route 6 Battery Point Mid-River FG 13 Route 6 Battery Point Mid-River FG 13

XIG8816 XIF9996 XJG0410 XJF2500 XIG8816 XIF9996 XJG0410 XJF2500

Biological Oxygen Demand

0 12/13/99 01/12/00 02/22/00 02/28/00 03/07/00 04/05/00 05/02/00 05/23/00

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 11 Document version: August 22, 2007 Gunpowder River High Flow Conditions (December-May) Stations are presented from left to right from downstream to upstream

Dissolved Inorganic Nitrogen Dissolved Inorganic Phosphorus

1.6 0.04

1.2 0.03

0.8 0.02 mg/liter mg/liter 0.4 0.01

0 0 Route 6 Battery Point Mid-River FG 13 Route 6 Battery Point Mid-River FG 13

XIG8816 XIF9996 XJG0410 XJF2500 XIG8816 XIF9996 XJG0410 XJF2500

Total Nitrogen Total Phosphorus

3.2 0.16

2.4 0.12

1.6 0.08 mg/liter mg/liter 0.8 0.04

0 0 Route 6 Battery Point Mid-River FG 13 Route 6 Battery Point Mid-River FG 13

XIG8816 XIF9996 XJG0410 XJF2500 XIG8816 XIF9996 XJG0410 XJF2500

Gunpowder River

20 12/13/99 01/12/00 02/22/00 02/28/00 03/07/00 04/05/00 05/02/00 05/23/00 0 Route 6 BatteryPoint

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 12 Document version: August 22, 2007 Gunpowder River Low Flow Conditions (June to November) Stations are presented from left to right from downstream to upstream

Chlorophyll a Dissolved Oxygen

20 12

15 9

10 6 µg/liter mg/liter 5 3

0 0 XIG8816 XIF9996 XJG0410 XJF2500 XIG8816 XIF9996 XJG0410 XJF2500 Route 6 Battery Point Mid-River FG 13 Route 6 Battery Point Mid-River FG 13

Total Suspended Solids Biological Oxygen Demand

40 6

30 4.5

20 3 mg/liter mg/liter 10 1.5

0 0 XIG8816 XIF9996 XJG0410 XJF2500 XIG8816 XIF9996 XJG0410 XJF2500

Route 6 Battery Point Mid-River FG 13 Route 6 Battery Point Mid-River FG 13

15 10 5 0 06/05/00 07/11/00 XIG8816 08/01/00 08/30/00 10/12/99 10/25/99XIF9996 11/15/99 11/29/99 Route 6 BatteryPoint

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 13 Document version: August 22, 2007 Gunpowder River Low Flow Conditions (June to November) Stations are presented from left to right from downstream to upstream

Dissolved Inorganic Nitrogen Dissolved Inorganic Phosphorus

1.2 0.04

0.9 0.03

0.6 0.02 mg/liter mg/liter 0.3 0.01

0 0 XIG8816 XIF9996 XJG0410 XJF2500 XIG8816 XIF9996 XJG0410 XJF2500

Route 6 Battery Point Mid-River FG 13 Route 6 Battery Point Mid-River FG 13

Total Nitrogen Total Phosphorus

1.6 0.08

1.2 0.06

0.8 0.04

mg/liter 0.4 mg/liter 0.02

0 0 XIG8816 XIF9996 XJG0410 XJF2500 XIG8816 XIF9996 XJG0410 XJF2500

Route 6 Battery Point Mid-River FG 13 Route 6 Battery Point Mid-River FG 13

15 10 5 0 06/05/00 08/01/00XIG8816 08/30/00 10/12/99 10/25/99 XIF999611/15/99 11/29/99

Route 6 BatteryPoint

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 14 Document version: August 22, 2007 GUNPOWDER RIVER STATION LIST

Station Station Lat/Long Description Code Names GUNPOWDER RIVER 39 18.360 In channel, near R 6. Depth ~35 ft. XIG8816 Route 6 76 18.914 39 19.871 SW of Battery Point. Depth ~ 6 ft. XIF9996 Battery Point 76 20.404 39 20.370 Mid-river. Depth ~ 7 ft. XJG0410 Mid-River 76 18.969 39 22.557 East of FG 13. Depth ~ 7 ft. XJF2500 FG 13 76 19.990

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 15 Document version: August 22, 2007 Lower Big Gunpowder Falls

Lower Big Gunpowder Falls Monitoring Stations

Map Prepared by the Maryland Department of the Environment Science Services Administration Montgomery Park Business Center 1800 Washington Boulevard, Suite 540 Baltimore, Maryland 21230-1718

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 16 Document version: August 22, 2007 Lower Big Gunpowder Falls High Flow Conditions (December-May) Stations are presented from left to right from downstream to upstream

Chlorophyll a Dissolved Oxygen

8 16

6 12

4 8 µg/liter

2 4

0 0 Route 7 Gunpowder Falls Long Green Creek Harford Road Cromwell Bridge Rd Route 7 Gunpowder Falls Long Green Harford Road Cromwell Bridge State Park State Park Creek Rd

GUN0036 GUN0059 LOG0011 GUN0109 GUN0125 GUN0036 GUN0059 LOG0011 GUN0109 GUN0125

Total Suspended Solids Biological Oxygen Demand

24 200 150 18 100 12 mg/liter mg/liter 50 6 0 0 Route 7 Gunpowder Long Green Harford Cromwell Route 7 Gunpowder Long Green Harford Road Cromwell Falls State Creek Road Bridge Rd Falls State Creek Bridge Rd Park Park

GUN0036 GUN0059 LOG0011 GUN0109 GUN0125 GUN0036 GUN0059 LOG0011 GUN0109 GUN0125

0.2 0.15 0.1 0.05 0

12/14/99Route 7 01/11/00 Gunpowder Falls01/24/00 State Park 02/23/00Long Green Creek 02/29/00 Harford03/06/00 Road 03/07/00CromwellBridge Rd 04/03/00 Cowen05/01/00 Run

GUN0036 GUN0059 LOG0011 GUN0109 GUN0125 CWE0013

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 17 Document version: August 22, 2007 Lower Big Gunpowder Falls High Flow Conditions (December-May) Stations are presented from left to right from downstream to upstream

Dissolved Inorganic Nitrogen Dissolved Inorganic Phosphorus

6 0.2 4.5 0.15 3 0.1 mg/liter 1.5 mg/liter 0.05 0 0 Route 7 Gunpowder Long Green Harford Cromwell Route 7 Gunpowder Long Green Harford Cromwell Falls State Creek Road Bridge Rd Falls State Creek Road Bridge Rd Park Park

GUN0036 GUN0059 LOG0011 GUN0109 GUN0125 GUN0036 GUN0059 LOG0011 GUN0109 GUN0125

Total Nitrogen Total Phosphorus

6 1.2 4.5 0.9 3 0.6

mg/liter 1.5 mg/liter 0.3 0 0 Route 7 Gunpowder Long Green Harford Road Cromwell Route 7 Gunpowder Long Green Harford Road Cromwell Falls State Creek Bridge Rd Falls State Creek Bridge Rd Park Park

GUN0036 GUN0059 LOG0011 GUN0109 GUN0125 GUN0036 GUN0059 LOG0011 GUN0109 GUN0125

0.2 0.15 0.1 0.05 0

12/14/99 Route 7 01/11/00 Gunpowder01/24/00 Falls State Park 02/23/00Long Green Creek 02/29/00 Harford03/06/00 Road 03/07/00CromwellBridge Rd 04/03/00 Cowen05/01/00 Run

GUN0036 GUN0059 LOG0011 GUN0109 GUN0125 CWE0013

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 18 Document version: August 22, 2007 Lower Big Gunpowder Falls Low Flow Conditions (June to November) Stations are presented from left to right from downstream to upstream

Chlorophyll a Dissolved Oxygen

16 20 12 15 8 10

µg/liter 4 mg/liter 5 0 0 Road Road Route 7 Harford Route 7 Harford Park Park Creek Creek Cromwell Cromwell Bridge Rd Bridge Rd Falls State Falls State Long Green Cowen Run Long Green Cowen Run Gunpowder Gunpowder GUN0036 GUN0059 LOG0011 GUN0109 GUN0125 CWE0013 GUN0036 GUN0059 LOG0011 GUN0109 GUN0125 CWE0013

Total Suspended Solids Biological Oxygen Demand

40 6

30 4.5

20 3 mg/liter 10 mg/liter 1.5

0 0 Run Run Long Long Creek Creek Green Green Road Road Cowen Cowen Harford Harford Route 7 Route 7 Park Park Cromwell Cromwell Bridge Rd Bridge Rd Falls State Falls State Gunpowder Gunpowder GUN0036 GUN0059 LOG0011 GUN0109 GUN0125 CWE0013 GUN0036 GUN0059 LOG0011 GUN0109 GUN0125 CWE0013

5

0 06/20/00Route 7 07/10/00Gunpowder Falls State Park 07/31/00Long Green Creek 08/29/00Harford Road 11/16/99CromwellBridge Rd Cowen11/30/99 Run

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 19 Document version: August 22, 2007 Lower Big Gunpowder Falls Low Flow Conditions (June to November) Stations are presented from left to right from downstream to upstream

Dissolved Inorganic Nitrogen Dissolved Inorganic Phosphorus

4.8 0.06 3.6 0.045 2.4 0.03 1.2 0.015 mg/liter mg/liter 0 0 Road Road Route 7 Harford Route 7 Harford Park Park Creek Creek Cromwell Cromwell Bridge Rd Bridge Rd Falls State Falls State Long Green Cowen Run Long Green Cowen Run Gunpowder Gunpowder GUN0036 GUN0059 LOG0011 GUN0109 GUN0125 CWE0013 GUN0036 GUN0059 LOG0011 GUN0109 GUN0125 CWE0013

Total Nitrogen Total Phosphorus

4.8 1.2 3.6 0.9 2.4 0.6

mg/liter 1.2 mg/liter 0.3 0 0 Road Road Route 7 Harford Route 7 Harford Park Park Creek Creek Cromwell Cromwell Bridge Rd Bridge Rd Falls State Falls State Long Green Cowen Run Long Green Cowen Run Gunpowder Gunpowder GUN0036 GUN0059 LOG0011 GUN0109 GUN0125 CWE0013 GUN0036 GUN0059 LOG0011 GUN0109 GUN0125 CWE0013

6

4

2

0 06/20/00 07/10/00 07/31/00 11/16/99 11/30/99

Route 7 Gunpowder Falls State Park Long Green Creek Harford Road CromwellBridge Rd Cowen Run

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 20 Document version: August 22, 2007 LOWER BIG GUNPOWDER FALLS STATION LIST

Station Station Lat/Long Description Code Names

LOWER BIG GUNPOWDER FALLS (below reservoir) GUN0036 Route 7 39 24.836 Rte 7 crossing. 76 24.338 GUN0059 Gunpowder 39 25.293 Richlyn Drive – downstream of Richlyn Manor Falls State 76 26.227 WWTP. From Rte 1 North (Belair Rd) make right at Park Forge Road; follow to left on Richlyn Drive. Follow to gate to Gunpowder Falls State Park and proceed down to WWTP. GUN0109 Harford Road 39 25.326 Harford Road crossing. Follow trail downstream of 76 30.130 bridge to collect bank sample. GUN0125 Cromwell 39 25.539 Cromwell Bridge Road/Glenarm Road bridge Bridge Rd 76 31.765 crossing. LONG GREEN CREEK (tributary of Lower Big Gunpowder) LOG0011 Long Green 39 26.925 Harford Road crossing. No good pull-off area; use Creek 76 28.325 Hartley Mill Road to park and walk to Harford Rd bridge crossing. There is a staff gage ~0.3 miles upstream on Hartley Mill Rd. Staff is located above Hillrise Rd and below Glen Arm Rd. COWEN RUN CWE0013 Cowen Run 39 26.612 76 30.593

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 21 Document version: August 22, 2007 Bird River Bird River Monitoring Stations

Map Prepared by the Maryland Department of the Environment Science Services Administration Montgomery Park Business Center 1800 Washington Boulevard, Suite 540 Baltimore, Maryland 21230-1718

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 22 Document version: August 22, 2007 Bird River High Flow Conditions (December-May) Stations are presented from left to right from downstream to upstream

Chlorophyll a Dissolved Oxygen

16 32 12 24 8 16

mg/liter 4 µg/liter 8 0 0 XJF3189 XJF2778 WNN0012 WHR0006 XJF3189 XJF2778 WNN0012 WHR0006

Amtrak Bridge Harwood Park Windlass Run White Marsh Amtrak Bridge Harwood Park Windlass Run White Marsh Run Run

Total Suspended Solids Biological Oxygen Demand

120 8

90 6

60 4 mg/liter mg/liter 30 2

0 0 XJF3189 XJF2778 WNN0012 WHR0006 XJF3189 XJF2778 WNN0012 WHR0006 Amtrak Bridge Harwood Park Windlass Run White Marsh Amtrak Bridge Harwood Park Windlass Run White Marsh Run Run

15 10 5 0 12/13/99 XJF3189 01/12/00 02/22/00 XJF2778 02/28/00 03/07/00 WNN0012 04/05/00 05/02/00 WHR0006 05/23/00

AmtrakBridge HarwoodPark Windlass Run White Marsh Run

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 23 Document version: August 22, 2007 Bird River High Flow Conditions (December-May) Stations are presented from left to right from downstream to upstream

Dissolved Inorganic Nitrogen Dissolved Inorganic Phosphorus

1.6 0.016

1.2 0.012

0.8 0.008 mg/liter mg/liter 0.4 0.004

0 0 XJF3189 XJF2778 WNN0012 WHR0006 XJF3189 XJF2778 WNN0012 WHR0006

Amtrak Bridge Harwood Park Windlass Run White Marsh Amtrak Bridge Harwood Park Windlass Run White Marsh Run Run

Total Nitrogen Total Phosphorus

2.5 0.16 2 0.12 1.5 1 0.08 mg/liter mg/liter 0.5 0.04 0 0 XJF3189 XJF2778 WNN0012 WHR0006 XJF3189 XJF2778 WNN0012 WHR0006

Amtrak Bridge Harwood Park Windlass Run White Marsh Amtrak Bridge Harwood Park Windlass Run White Marsh Run Run

15 10 5 0 12/13/99 XJF3189 01/12/00 02/22/00 XJF2778 02/28/00 03/07/00 WNN0012 04/05/00 05/02/00 WHR0006 05/23/00

AmtrakBridge HarwoodPark Windlass Run White Marsh Run

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 24 Document version: August 22, 2007 Bird River Low Flow Conditions (June to November) Stations are presented from left to right from downstream to upstream

Chlorophyll a Dissolved Oxygen

12.0 40.0

30.0 9.0 20.0

µg/liter 10.0 6.0

0.0 mg/liter 3.0

0.0 XJF3189 XJF2778 XJF3154 XJF2866 WNN0012 WHR0006 XJF3189 XJF2778 XJF3154 XJF2866 WNN0012 WHR0006 Amtrak Harwood Bird Bird Windlass White Amtrak Harwood Bird River Bird River Windlass White Bridge Park River 2 River 1 Run Marsh Bridge Park 2 1 Run Marsh

Total Suspended Solids Biological Oxygen Demand

160 4.8 120 80 3.6

mg/liter 40 2.4 0 mg/liter 1.2 0.0

XJF3189 XJF2778 XJF3154 XJF2866 XJF3189 XJF2778 XJF3154 XJF2866 WNN0012 WHR0006 WNN0012 WHR0006 Amtrak Harwood Bird River Bird River Windlass White Amtrak Harwood Bird River Bird River Windlass White Bridge Park 2 1 Run Marsh Bridge Park 2 1 Run Marsh

160 120 80 40 0 06/05/00XJF3189 07/11/00 XJF2778 08/01/00 XJF315408/30/00 10/12/99XJF2866 10/25/99 WNN0012 11/15/99 WHR0006 11/29/99 AmtrakBridge HarwoodPark BirdRiver 2 BirdRiver 1 Windlass Run White Marsh Run

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 25 Document version: August 22, 2007 Bird River Low Flow Conditions (June to November) Stations are presented from left to right from downstream to upstream

Dissolved Inorganic Nitrogen Dissolved Inorganic Phosphorus

2.0 0.020 0.015 1.5 0.010 0.005

1.0 mg/liter 0.000 mg/liter 0.5 0.0

XJF3189 XJF2778 XJF3154 XJF2866 WNN0012 WHR0006 XJF3189 XJF2778 XJF3154 XJF2866 WNN0012 WHR0006 Amtrak Harwood Bird River Bird River Windlass White Amtrak Harwood Bird River Bird River Windlass White Bridge Park 2 1 Run Marsh Bridge Park 2 1 Run Marsh

Total Nitrogen Total Phosphorus

2.50 0.20

2.00 0.15 1.50 0.10 1.00 mg/liter mg/liter 0.50 0.05

0.00 0.00 XJF3189 XJF2778 XJF3154 XJF2866 WNN0012 WHR0006 XJF3189 XJF2778 XJF3154 XJF2866 WNN0012 WHR0006 Amtrak Harwood Bird River Bird River Windlass White Bridge Park 2 1 Run Marsh Amtrak Harwood Bird River Bird River Windlass White Run Bridge Park 2 1 Run Marsh

160 120 80 40 0 06/05/00XJF3189 07/11/00 XJF2778 08/01/00 XJF315408/30/00 10/12/99XJF2866 10/25/99 WNN0012 11/15/99 WHR000611/29/99

AmtrakBridge HarwoodPark BirdRiver 2 BirdRiver 1 Windlass Run White Marsh Run

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 26 Document version: August 22, 2007 BIRD RIVER STATION LIST

Station Station Code Lat/Long Description Names BIRD RIVER XJF3189 Amtrak 39 23.185 -- Immediately NW of Amtrak bridge in very shallow (2 bridge 76 21.112 FT) water. Not in dredged channel. XJF2778 Harwood 39 22.729 Close to un-named point on south shore of river. Off Park -76 22.221 Harwood Park. 4 FT. XJF2866 Bird River 1 39 22.830 -76 23.354 XJF3154 Bird River 2 39 23.121 -76 24.568 WINDLASS RUN (tributary of Bird River) WNN0012 Windlass 39 21.990 Bird River Road crossing. Road construction MB-22 Run -76 24.812 currently underway, but station can be accessed. Baltimore County ADC map 30 – B12. WHITE MARSH RUN (tributary of Bird River) WHR0006 White Marsh 39 22.678 Ebenezer Road crossing. MB-23 Run -76 25.466

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 27 Document version: August 22, 2007 Little Gunpowder Falls

Little Gunpowder Falls Monitoring Stations

Map Prepared by the Maryland Department of the Environment Science Services Administration Montgomery Park Business Center 1800 Washington Boulevard, Suite 540 Baltimore, Maryland 21230-1718

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 28 Document version: August 22, 2007 Little Gunpowder Falls High Flow Conditions (December-May) Stations are presented from left to right from downstream to upstream

Chlorophyll a Dissolved Oxygen

32 16 24 16 12

µg/liter 8 8

0 mg/liter 4

0 Rd Rd Route 7 Branch USGS Wild Cat Bridge Covered Bottom Rd Rd Jericho Rd Pocock Rd Rd Greene Rd Route 7 Bridge USGS Jarrettsville Covered Pleasantville Jericho Rd Bottom Rd Greene Rd Pocock Rd Jarrettsville Pleasantville LGU0024LGU0048LGU0107LGU0127LGU0153LGU0191LGU0205WDC0006 LGU0024 LGU0048 LGU0107 LGU0127 LGU0153 LGU0191 LGU0205

Biological Oxygen Demand Total Suspended Solids

3.2 240 2.4 180 120 1.6 mg/liter

mg/liter 60 0.8 0 0.0 Rd Rd Route 7 Rd Branch Rd Route 7 Branch USGS Bridge Wild Cat USGS Wild Cat Bridge Covered Covered Jericho Rd Bottom Rd Bottom Rd Greene Rd Pocock Rd Jericho Rd Pocock Rd Greene Rd Jarrettsville Jarrettsville Pleasantville Pleasantville LGU0024LGU0048LGU0107LGU0127LGU0153LGU0191LGU0205WDC0006 LGU0024LGU0048LGU0107LGU0127LGU0153LGU0191LGU0205WDC0006

01/03/00 01/02/00 12/14/99 01/11/00 01/24/00 02/23/00 02/29/00 03/06/00 04/03/00

01/01/00

01/00/00

Route 7 JerichoRd Covered Bridge BottomRd USGS Pleasantville Rd GreeneRd JarrettsvilleRd PocockRd Wild Cat Branch 05/01/00 05/24/00

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 29 Document version: August 22, 2007 Little Gunpowder Falls High Flow Conditions (December-May) Stations are presented from left to right from downstream to upstream

Dissolved Inorganic Nitrogen Dissolved Inorganic Phosphorus

4.8 0.16 3.6 0.12 2.4 0.08 1.2

mg/liter 0.04 mg/liter 0 0 Rd Rd Rd Rd Route 7 Branch Route 7 Branch USGS Wild Cat USGS Wild Cat Bridge Bridge Covered Covered Bottom Rd Bottom Rd Jericho Rd Pocock Rd Jericho Rd Pocock Rd Greene Rd Greene Rd Jarrettsville Jarrettsville Pleasantville Pleasantville LGU0024LGU0048LGU0107LGU0127LGU0153LGU0191LGU0205WDC0006 LGU0024LGU0048LGU0107LGU0127LGU0153LGU0191LGU0205WDC0006

Total Nitrogen Total Phosphorus

0.8 4 0.6 3 2 0.4 mg/liter mg/liter 1 0.2 0 0 Rd Rd Route 7 Rd Branch Rd Route 7 Branch USGS Wild Cat Bridge USGS Wild Cat Bridge Covered Covered Bottom Rd Jericho Rd Bottom Rd Greene Rd Pocock Rd Jericho Rd Pocock Rd Jarrettsville Greene Rd Jarrettsville Pleasantville Pleasantville LGU0024LGU0048LGU0107LGU0127LGU0153LGU0191LGU0205WDC0006 LGU0024LGU0048LGU0107LGU0127LGU0153LGU0191LGU0205WDC0006

01/03/00 01/02/00 12/14/99 01/11/00 01/24/00 02/23/00 02/29/00 03/06/00 04/03/00 01/01/00 01/00/00

Route 7 JerichoRd Covered Bridge BottomRd USGS Pleasantville Rd GreeneRd JarrettsvilleRd PocockRd Wild Cat Branch 05/01/00 05/24/00

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 30 Document version: August 22, 2007 Little Gunpowder Falls Low Flow Conditions (June to November) Stations are presented from left to right from downstream to upstream

Chlorophyll a Dissolved Oxygen

4 16 3 12 2 8

µg/liter 1

mg/liter 4 0 0 Rd Rd Rd Rd Route 7 Branch Route 7 Branch USGS Wild Cat USGS Wild Cat Bridge Bridge Covered Covered Bottom Rd Bottom Rd Jericho Rd Pocock Rd Jericho Rd Pocock Rd Greene Rd Greene Rd Jarrettsville Jarrettsville Pleasantville Pleasantville LGU0024LGU0048LGU0107LGU0127LGU0153LGU0191LGU0205WDC0006 LGU0024LGU0048LGU0107LGU0127LGU0153LGU0191LGU0205WDC0006

Total Suspended Solids Bological Oxygen Demand

20 6 15 4.5 10 3

mg/liter 5 mg/liter 1.5 0 0 Rd Rd Rd Rd Route 7 Branch Route 7 Branch USGS Wild Cat USGS Wild Cat Bridge Bridge Covered Covered Bottom Rd Bottom Rd Jericho Rd Pocock Rd Jericho Rd Pocock Rd Greene Rd Greene Rd Jarrettsville Jarrettsville Pleasantville Pleasantville LGU0024LGU0048LGU0107LGU0127LGU0153LGU0191LGU0205WDC0006 LGU0024LGU0048LGU0107LGU0127LGU0153LGU0191LGU0205WDC0006

6

4 2 06/20/00 07/10/00 07/31/00 08/29/00 10/13/99 10/26/99 11/16/99 11/30/99 0

Route 7 JerichoRd Covered Bridge BottomRd USGS Pleasantville Rd GreeneRd JarrettsvilleRd PocockRd Wild Cat Branch

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 31 Document version: August 22, 2007 Little Gunpowder Falls Low Flow Conditions (June to November) Stations are presented from left to right from downstream to upstream

Dissolved Inorganic Nitrogen Dissolved Inorganic Phosphorus

0.04 4 3 0.03 2 0.02 1 mg/liter 0.01 mg/liter 0 0 Rd Rd Route 7 Branch Rd USGS Wild Cat Bridge Rd Route 7 Branch USGS Wild Cat Covered Bridge Bottom Rd Covered Jericho Rd Pocock Rd Greene Rd Jarrettsville Bottom Rd Jericho Rd Pocock Rd Greene Rd Pleasantville Jarrettsville Pleasantville LGU0024LGU0048LGU0107LGU0127LGU0153LGU0191LGU0205WDC0006 LGU0024LGU0048LGU0107LGU0127LGU0153LGU0191LGU0205WDC0006

Total Nitrogen Total Phosphorus

4 1.2 3 0.9 2 0.6 mg/liter mg/liter 1 0.3 0 0 Rd Rd Rd Route 7 Branch Rd USGS Wild Cat Route 7 Branch Bridge USGS Wild Cat Bridge Covered Covered Bottom Rd Jericho Rd Pocock Rd Greene Rd Bottom Rd Jericho Rd Pocock Rd Greene Rd Jarrettsville Jarrettsville Pleasantville Pleasantville LGU0024LGU0048LGU0107LGU0127LGU0153LGU0191LGU0205WDC0006 LGU0024LGU0048LGU0107LGU0127LGU0153LGU0191LGU0205WDC0006

6

4 2 06/20/00 07/10/00 07/31/00 08/29/00 10/13/99 10/26/99 11/16/99 11/30/99 0

Route 7 JerichoRd Covered Bridge BottomRd USGS Pleasantville Rd GreeneRd JarrettsvilleRd PocockRd Wild Cat Branch

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 32 Document version: August 22, 2007 LITTLE GUNPOWDER FALLS STATION LIST

Station Station Lat/Long Description Code Names LITTLE GUNPOWDER FALLS LGU0024 Route 7 39 25.422 Rte 7 crossing. Sample bank from fisherman’s 76 22.709 path.

LGU0048 Jericho Rd. 39 27.578 Jericho Road crossing at covered bridge. . Take Covered 76 23.256 Jericho south off of Jerusalem Road. Bank sample. Bridge Baltimore County ADC map 22 – F8/9 LGU0107 Bottom Rd. 39 30.303 Bottom Road crossing. USGS Gage upstream of USGS 76 25.962 road crossing.

LGU0127 Pleasantville 39 30.450 Pleasantville Road crossing. Rd. 76 27.562

LGU0153 Greene Rd. 39 31.488 Greene Road crossing. Make sure you are getting 76 29.848 the Little Gunpowder and not the small tributary entering the LGF. There are two crossings on Greene Road. Harford County ADC map 15 – D10. LGU0191 Jarrettsville 39 32.615 Jarrettsville Road (Rte 146) crossing. Rd. 76 31.849

LGU0205 Pocock Rd. 39 34.312 Pocock Road crossing. 76 32.450

WILD CAT BRANCH (tributary of Little Gunpowder) WDC0006 Wild Cat 39 28.860 Reckord Road crossing. Harford County ADC map Branch 76 24.105 22 – H5. Rocky streambed, but flow is possible.

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 33 Document version: August 22, 2007 Middle River – Browns

Middle River – Browns Monitoring Stations

Map Prepared by the MD Department of the Environment Science Services Administration Montgomery Park Business Center 1800 Washington Boulevard, Suite 540 Baltimore, Maryland 21230-1718

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 34 Document version: August 22, 2007 Middle River-Browns High Flow Conditions (December-May) Stations are presented from left to right from downstream to upstream

Chlorophyll a Dissolved Oxygen

80 16

60 12

40 8 µg/liter 20 mg/liter 4

0 0 Browns Bowley Point Lighted Frog Mortar Hawthorn Browns Bowley Lighted Frog Mortar Hawthorn Creek Becon Creek Park Creek Point Becon Creek Park

XIF6466 XIF7768 XIF8454 XIF8958 XIF9536 XIF6466 XIF7768 XIF8454 XIF8958 XIF9536

Total Suspended Solids Biological Oxygen Demand

60 12

45 9

30 6 mg/liter mg/liter 15 3

0 0 Browns Bowley Lighted Frog Mortar Hawthorn Browns Bowley Lighted Frog Mortar Hawthorn Creek Point Becon Creek Park Creek Point Becon Creek Park

XIF6466 XIF7768 XIF8454 XIF8958 XIF9536 XIF6466 XIF7768 XIF8454 XIF8958 XIF9536

01/10/00 01/05/00 01/00/00 12/13/99BrownsCreek 01/12/00 02/22/00BowleyPoint 02/28/00 LightedBecon 03/07/00 04/05/00FrogMortar Creek 05/02/00 Hawthorn Park 05/23/00

XIF6466 XIF7768 XIF8454 XIF8958 XIF9536

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 35 Document version: August 22, 2007 Middle River-Browns High Flow Conditions (December-May) Stations are presented from left to right from downstream to upstream

Dissolved Inorganic Nitrogen Dissolved Inorganic Phosphorus

1.60 0.03

1.20 0.02

0.80 0.01 mg/liter 0.40 mg/liter 0.01 0.00 0.00 Browns Bowley Lighted Frog Mortar Hawthorn Browns Bowley Point Lighted Frog Mortar Hawthorn Creek Point Becon Creek Park Creek Becon Creek Park

XIF6466 XIF7768 XIF8454 XIF8958 XIF9536 XIF6466 XIF7768 XIF8454 XIF8958 XIF9536

Total Nitrogen Total Phosphorus

2.4 0.16

1.8 0.12

1.2 0.08

mg/liter 0.6 mg/liter 0.04

0.0 0.00 Browns Bowley Lighted Frog Mortar Hawthorn Browns Bowley Lighted Frog Mortar Hawthorn Creek Point Becon Creek Park Creek Point Becon Creek Park

XIF6466 XIF7768 XIF8454 XIF8958 XIF9536 XIF6466 XIF7768 XIF8454 XIF8958 XIF9536

01/10/00 01/05/00 01/00/00 12/13/99BrownsCreek 01/12/00 02/22/00BowleyPoint 02/28/00 LightedBecon 03/07/00 04/05/00FrogMortar Creek 05/02/00 Hawthorn Park 05/23/00 XIF6466 XIF7768 XIF8454 XIF8958 XIF9536

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 36 Document version: August 22, 2007 Middle River-Browns Low Flow Conditions (June to November) Stations are presented from left to right from downstream to upstream

Chlorophyll a Dissolved Oxygen

100 16

75 12

50 8 µg/liter 25 mg/liter 4

0 0 Browns Bowley Point Lighted Frog Mortar Hawthorn Browns Bowley Lighted Frog Mortar Hawthorn Creek Becon Creek Park Creek Point Becon Creek Park

XIF6466 XIF7768 XIF8454 XIF8958 XIF9536 XIF6466 XIF7768 XIF8454 XIF8958 XIF9536

Total Suspended Solids Biological Oxygen Demand

12 60 9 45 6 30

15 mg/liter 3 mg/liter 0 0 Browns Bowley Lighted Frog Mortar Hawthorn Browns Bowley Lighted Frog Mortar Hawthorn Creek Point Becon Creek Park Creek Point Becon Creek Park

XIF6466 XIF7768 XIF8454 XIF8958 XIF9536 XIF6466 XIF7768 XIF8454 XIF8958 XIF9536

100 50 0 06/05/00BrownsCreek 07/11/00 08/01/00BowleyPoint 08/30/00LightedBecon 10/12/99 10/25/99FrogMortar Creek 11/15/99 Hawthorn Park 11/29/99

XIF6466 XIF7768 XIF8454 XIF8958 XIF9536

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 37 Document version: August 22, 2007 Middle River-Browns Low Flow Conditions (June to November) Stations are presented from left to right from downstream to upstream

Dissolved Inorganic Nitrogen Dissolved Inorganic Phosphorus

1.2 0.04 0.9 0.03 0.6 0.02

mg/liter 0.3 mg/liter 0.01 0 0 Browns Bowley Lighted Frog Mortar Hawthorn Browns Bowley Lighted Frog Mortar Hawthorn Creek Point Becon Creek Park Creek Point Becon Creek Park

XIF6466 XIF7768 XIF8454 XIF8958 XIF9536 XIF6466 XIF7768 XIF8454 XIF8958 XIF9536

Total Nitrogen Total Phosphorus

1.6 1.2 0.16 0.12 0.8 0.08 mg/liter

0.4 mg/liter 0.04 0 0 Browns Bowley Lighted Frog Mortar Hawthorn Browns Bowley Lighted Frog Mortar Hawthorn Creek Point Becon Creek Park Creek Point Becon Creek Park XIF6466 XIF7768 XIF8454 XIF8958 XIF9536 XIF6466 XIF7768 XIF8454 XIF8958 XIF9536

100 50 0

BrownsCreek BowleyPoint LightedBecon FrogMortar Creek Hawthorn Park

06/05/00XIF6466 07/11/00 08/01/00XIF7768 08/30/00 XIF8454 10/12/99 10/25/99XIF8958 11/15/99 XIF9536 11/29/99

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 38 Document version: August 22, 2007 MIDDLE RIVER – BROWNS STATION LIST

Station Code Station Names Lat/Long Description

MIDDLE RIVER XIF7768 39 17.610 West of DM R6, south of Bowley Point. Bowley Point 76 23.326 Depth ~ 10 ft. XIF8454 39 18.375 Middle of marked channel, SW of lighted Lighted Beacon 76 24.636 beacon. Depth ~ 7-10 ft. XIF9536 39 19.475 At end of Midthorn Road. Sample from pier Hawthorn Park 76 26.381 at Hawthorn Park. FROG MORTAR CR. (TRIBUTARY OF MIDDLE RIVER) XIF8958 Frog Mortar Creek 39 18.892 SE of Martin State Airport. Depth ~ 12 ft. 76 24.230 BROWNS CR. (TRIBUTARY OF MIDDLE RIVER) XIF6466 Browns Creek 39 16.440 Between Balliston Point and Wells Point. 76 23.432 Depth ~ 6 ft.

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 39 Document version: August 22, 2007

Patapsco/Back River Watersheds

Back River

Bodkin Creek

Jones Falls

Gwynn Falls

Patapsco River Lower North Branch

Liberty Reservior

Patapsco River South Branch

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 40 Document version: August 22, 2007 Patapsco River Sub-Basin (Sub-basin 02-13-09)

General Description (from 1998, 305 (b) Report) The Patapsco/Back Rivers sub-basin drains 635 square miles of Baltimore City and portions of Anne Arundel, Baltimore, Carroll, and Howard Counties.

Except for the immediate area surrounding the Baltimore Harbor area, most of the sub-basin lies in the Piedmont Province; the remaining area lies in the Coastal Plain Province. Large water bodies include Back River, Gwynns and Jones Falls, the South and North Branches of the Patapsco River, Lake Roland, Piney Run Reservoir, Liberty Reservoir, and Baltimore Harbor, a tidal embayment formed at the confluence of the Patapsco River and the Jones and Gwynns Falls.

Land in the Patapsco River sub-basin is primarily developed (47 percent of the drainage land area) although there are significant forest and agricultural areas (29 and 23 percent), particularly in the western portion of the watershed. The City of Baltimore is the sub-basin's largest city with suburban communities extending outward in all directions. Other major communities in this sub- basin include Ellicott City, Towson and Glen Burnie.

Most surface waters in the sub-basin are classified as Use I (water contact recreation and aquatic life), Use III (natural trout) or Use IV (put-and-take trout). Above Liberty Reservoir dam or above the Springfield intake, surface waters are classified as Use I-P (water contact recreation, aquatic life and public water supply) or Use III-P (natural trout and public water supply) or IV-P (put-and-take trout and public water supply) (COMAR '26.08.02.08J). For the most recent information regarding specific use classes in this watershed, the reader is referred to the Code of Maryland Regulations. One small creek, located in North Point State Park (Shallow Creek) is classified as a Use II water and is technically located in this sub-basin, even though it empties directly into the Bay. This creek is closed to shellfish harvesting because of the lack of a monitoring program rather than having poor water quality (Kathy Brohawn, 1998, pers. comm.).

The State routinely monitors water quality at two Bay Tributary stations and at five additional CORE/Trend stations located in the free-flowing and tidal Patapsco River and in Jones and Gwynns Falls. In addition to chemical sampling, phytoplankton and microzooplankton (one station) and mesozooplankton (one station) communities are monitored. Five fixed Long Term Benthic Macroinvertebrate program stations are monitored for estuarine benthos in addition to randomly selected Long Term Benthic Macroinvertebrate program sites. The Maryland Biological Stream Survey (MBSS) collected water quality samples at 61 stations in 1995 and at 69 stations in 1996.

Because of sediment, nutrient and bacterial problems in urban and developing areas in this basin, four areas have been designated for special water quality restoration projects under the State's Targeted Watershed or MDE's Program. These include Sawmill Creek.

Water Quality Summary Bodkin Creek (02130902) will be addressed by a cooperative effort by the Bay States with the EPA Chesapeake Bay Program taking the lead. Jones Falls (02130904), Gwynn Falls (02130905) , Patapsco River Lower N. Branch (02130906), and Liberty Reservoir (02130907) will be addressed at a future date. South Branch Patapsco (02130908) received a Water Quality Analysis concurrence from EPA on January 20, 2005, and Carroll County has agreed to do a watershed protection plan. TMDLs to address the nutrient impairments in Back River (02130901), and the

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 41 Document version: August 22, 2007 Baltimore Harbor (02130903), were developed by MDE. The Back River Nutrient TMDL was approved by EPA June 29, 2005 and the Baltimore Harbor Nutrient TMDL was submitted to EPA December 14, 2006.

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 42 Document version: August 22, 2007 Back River Back River Monitoring Stations

Map Prepared by the Maryland Department of the Environment Science Services Administration Montgomery Park Business Center 1800 Washington Boulevard, Suite 540 Baltimore, Maryland 21230-1718

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 43 Document version: August 22, 2007 Back River High Flow Conditions (December-May) Stations are presented from left to right from downstream to upstream

Chlorophyll a Dissolved Oxygen

6.0 16

4.5 12 8 3.0 mg/liter µg/liter 4 1.5 0 0.0 Moore's Run Moore's Run Herring Run Red House Northeast Moore's Run Moore's Run Herring Run Red House Northeast 1 2 Run Creek 1 2 Run Creek

HRR0002 MOO0002 HRR0017 RDH0007 NEC0020 HRR0002 MOO0002 HRR0017 RDH0007 NEC0020

Total Suspended Solids Biological Oxygen Demand

48 16

36 12

24 8

mg/liter 12 mg/liter 4

0 0 Moore's Run Moore's Run Herring Run Red House Northeast Moore's Run Moore's Run Herring Run Red House Northeast 1 2 Run Creek 1 2 Run Creek

HRR0002 MOO0002 HRR0017 RDH0007 NEC0020 HRR0002 MOO0002 HRR0017 RDH0007 NEC0020

01/00/1900

01/00/1900

01/00/1900 12/14/1999 01/11/2000 01/24/2000 02/23/2000 02/29/2000 03/06/2000 04/03/2000 05/01/2000 05/24/2000

01/00/1900

Moore's Run 1 Moore's Run 2 Herring Run Red House Run Northeast Creek

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 44 Document version: August 22, 2007 Back River High Flow Conditions (December-May) Stations are presented from left to right from downstream to upstream

Dissolved Inorganic Nitrogen Dissolved Inorganic Phosphorus

3.2 0.12

2.4 0.09

1.6 0.06 mg/liter mg/liter 0.8 0.03

0.0 0.00 Moore's Run Moore's Run Herring Run Red House Northeast Moore's Run Moore's Run Herring Run Red House Northeast 1 2 Run Creek 1 2 Run Creek HRR0002 MOO0002 HRR0017 RDH0007 NEC0020 HRR0002 MOO0002 HRR0017 RDH0007 NEC0020

Total Nitrogen Total Phosphorus

4 0.24

3 0.18

2 0.12 mg/liter mg/liter 1 0.06

0 0.00 Moore's Run Moore's Run Herring Run Red House Northeast Moore's Run Moore's Run Herring Run Red House Northeast 1 2 Run Creek 1 2 Run Creek HRR0002 MOO0002 HRR0017 RDH0007 NEC0020 HRR0002 MOO0002 HRR0017 RDH0007 NEC0020

01/00/1900

01/00/1900

01/00/1900 12/14/1999 01/11/2000 01/24/2000 02/23/2000 02/29/2000 03/06/2000 04/03/2000 05/01/2000 05/24/2000

01/00/1900

Moore's Run 1 Moore's Run 2 Herring Run Red House Run Northeast Creek

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 45 Document version: August 22, 2007 Back River Low Flow Conditions (June to November) Stations are presented from left to right from downstream to upstream

Chlorophyll a Dissolved Oxygen

12 16

9 12

6 8 µg/liter mg/liter 3 4

0 0 Moore's Run Moore's Run Herring Run Red House Northeast Moore's Run Moore's Run Herring Run Red House Northeast 1 2 Run Creek 1 2 Run Creek HRR0002 MOO0002 HRR0017 RDH0007 NEC0020 HRR0002 MOO0002 HRR0017 RDH0007 NEC0020

Total Suspended Solids Biological Oxygen Demand

28 8

21 6

14 4

mg/liter 7 mg/liter 2

0 0 Moore's Run Moore's Run Herring Run Red House Northeast Moore's Run Moore's Run Herring Run Red House Northeast 1 2 Run Creek 1 2 Run Creek

HRR0002 MOO0002 HRR0017 RDH0007 NEC0020 HRR0002 MOO0002 HRR0017 RDH0007 NEC0020

01/03/1900

01/02/1900

01/01/1900 01/00/1900 06/20/2000 07/10/2000 07/31/2000 08/29/2000 10/13/1999 10/26/1999 11/16/1999 11/30/1999 Moore'sRun 1 Moore'sRun 2 HerringRun RedHouse Run NortheastCreek

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 46 Document version: August 22, 2007 Back River Low Flow Conditions (June to November) Stations are presented from left to right from downstream to upstream

Dissolved Inorganic Nitrogen Dissolved Inorganic Phosphorus

2.4 0.04

1.8 0.03

1.2 0.02 mg/liter 0.6 mg/liter 0.01 0.0 0.00 Moore's Run Moore's Run Herring Run Red House Northeast Moore's Run Moore's Run Herring Run Red House Northeast 1 2 Run Creek 1 2 Run Creek

HRR0002 MOO0002 HRR0017 RDH0007 NEC0020 HRR0002 MOO0002 HRR0017 RDH0007 NEC0020

Total Nitrogen Total Phosphorus

3.2 0.12

2.4 0.09

1.6 0.06 mg/liter 0.8 mg/liter 0.03

0.0 0.00 Moore's Run Moore's Run Herring Run Red House Northeast Moore's Run Moore's Run Herring Run Red House Northeast 1 2 Run Creek 1 2 Run Creek

HRR0002 MOO0002 HRR0017 RDH0007 NEC0020 HRR0002 MOO0002 HRR0017 RDH0007 NEC0020

01/03/1900

01/02/1900

01/01/1900 01/00/1900 06/20/2000 07/10/2000 07/31/2000 08/29/2000 10/13/1999 10/26/1999 11/16/1999 11/30/1999 Moore'sRun 1 Moore'sRun 2 HerringRun RedHouse Run NortheastCreek

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 47 Document version: August 22, 2007 BACK RIVER STATION LIST

Station Station Lat/Long Description Code Names

HERRING RUN HRR0017 Herring Run 39 18.375 Rte 40 crossing. Pull into Baltimore City Towing 76 32.306 Division and collect bank sample. HRR0002 Moore’s Run 1 39 18.477 Actually named Moores Run according to ADC map. 76 30.991 From Baltimore City Towing Division, take Rte 40 West, make left onto North Pt Boulevard. Go through light at Quad Ave. Make left at industrial building on left near 500 block of North Pt Blvd; you are now on an unnamed gravel access road. Follow gravel road under the Rte 95 over-pass and over the first set of train tracks. Follow dirt road along second, larger set of train tracks until you reach a large concrete/steel pipe crossing over Moores Run. The site looks like a dumping grounds for concrete rubble and trash. The station will be obvious once found; no flow due to tidal influence. Baltimore County ADC map 36 – G10. MOORE’S RUN MOO0002 Moore’s Run 2 39 18.416 From Rte 40 take 64th or 65th Street and follow to 76 31.762 Biddle Street. Make right on Biddle and follow to corner of 62nd Street and Biddle Street. There is a “Road End” sign here and a guard rail blocking where Biddle St used to continue. Walk along old existing Biddle St down to stream. Baltimore County ADC map 36 – E10. RED HOUSE RUN RDH0007 Red House 39 19.020 Red House Run at Rte 40 crossing. West bound Rte Run 76 30.951 40 has a good pull off location on bridge. Baltimore County ADC map 36 – G8. NORTHEAST CREEK NEC0020 Northeast 39 19.799 Northeast Creek / Stemmers Run at Golden Ring Creek 76 28.446 Road bridge crossing. Good pull off in Kelly’s Bar parking lot directly across from station. . Baltimore County ADC map 37 – C6.

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 48 Document version: August 22, 2007 Bodkin Creek Bodkin Creek Monitoring Stations

Map Prepared by the Maryland Department of the Environment Science Services Administration Montgomery Park Business Center 1800 Washington Boulevard, Suite 540 Baltimore, Maryland 21230-1718 2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 49 Document version: August 22, 2007 Bodkin Creek High Flow Conditions (December-May) Stations are presented from left to right from downstream to upstream

Chlorophyll a Dissolved Oxygen

100 16 75 12 50 8 4 µg/liter 25 mg/liter 0 0 Bodkin Mail Main Wharf Back Bodkin Mail Main Wharf Back Creek Creek at Creek at Creek Creek Creek Creek at Creek at Creek Creek Mid Fork Mid Fork

XHF8139 XHF7730 XHF7512 XHF7432 XHF8026 XHF8139 XHF7730 XHF7512 XHF7432 XHF8026

Total Suspended Solids Biological Oxygen Demand

40 10 30 8 20 5

mg/liter 10

mg/liter 3 0 0 Bodkin Mail Creek Main Wharf Back Bodkin Mail Creek Main Creek Wharf Back Creek Creek at Mid Creek at Creek Creek Creek at Mid at Fork Creek Fork

XHF8139 XHF7730 XHF7512 XHF7432 XHF8026 XHF8139 XHF7730 XHF7512 XHF7432 XHF8026

2 1.5 1 0.5 0

12/13/99 Bodkin Creek 01/12/00 02/22/00 MailCreek at Mid 02/28/00 03/15/00 MainCreek at Fork 04/12/00 05/10/00 WharfCreek 05/23/00

XHF8139 XHF7730 XHF7512 XHF7432

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 50 Document version: August 22, 2007 Bodkin Creek High Flow Conditions (December-May) Stations are presented from left to right from downstream to upstream

Dissolved Inorganic Nitrogen Dissolved Inroganic Phosphorus

1.6 0.024 1.2 0.018

0.8 0.012 mg/liter 0.4 mg/liter 0.006

0 0 Bodkin Mail Creek Main Creek Wharf Back Creek Bodkin Mail Creek Main Creek Wharf Back Creek Creek at Mid at Fork Creek Creek at Mid at Fork Creek

XHF8139 XHF7730 XHF7512 XHF7432 XHF8026 XHF8139 XHF7730 XHF7512 XHF7432 XHF8026

Total Nitrogen Total Phosphorus

2 0.1

1.5 0.075

1 0.05 mg/liter 0.5 mg/liter 0.025

0 0 Bodkin Mail Creek Main Creek Wharf Back Creek Bodkin Mail Creek Main Creek Wharf Back Creek Creek at Mid at Fork Creek Creek at Mid at Fork Creek

XHF8139 XHF7730 XHF7512 XHF7432 XHF8026 XHF8139 XHF7730 XHF7512 XHF7432 XHF8026

2 1.5

1 0.5 0 12/13/99 01/12/00 02/22/00 02/28/00 03/15/00 04/12/00 05/10/00 Bodkin Creek Mail Creek at Mid Main Creek at Fork Wharf Creek XHF8139 XHF7730 XHF7512 XHF7432

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 51 Document version: August 22, 2007 Bodkin Creek Low Flow Conditions (June to November) Stations are presented from left to right from downstream to upstream

Chlorophyll a Dissolved Oxygen

160 12

120 9

80 6 µg/liter 40 mg/liter 3

0 0 Bodkin Mail Creek at Main Creek Wharf Creek Back Creek Bodkin Mail Creek at Main Creek Wharf Creek Back Creek Creek Mid at Fork Creek Mid at Fork

XHF8139 XHF7730 XHF7512 XHF7432 XHF8026 XHF8139 XHF7730 XHF7512 XHF7432 XHF8026

Toal Suspended Solids Biological Oxygen Demand

80 16 60 12 40 8 mg/liter mg/liter 20 4 0 0 Bodkin Mail Creek at Main Creek Wharf Creek Back Creek Bodkin Creek Mail Creek at Main Creek Wharf Creek Back Creek Creek Mid at Fork Mid at Fork

XHF8139 XHF7730 XHF7512 XHF7432 XHF8026 XHF8139 XHF7730 XHF7512 XHF7432 XHF8026

0.02 0.01 0

Bodkin Creek MailCreek at Mid MainCreek at Fork WharfCreek Back Creek 06/05/00 08/09/00 09/07/00 10/12/99 10/25/99 11/15/99 11/29/99

XHF8139 XHF7730 XHF7512 XHF7432 XHF8026

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 52 Document version: August 22, 2007 Bodkin Creek Low Flow Conditions (June to November) Stations are presented from left to right from downstream to upstream

Dissolved Inorganic Nitrogen Dissolved Inorganic Phosphorus

1 0.02 0.75 0.015

0.5 0.01 mg/liter mg/liter 0.25 0.005 0 0 Bodkin Creek Mail Creek at Main Creek at Wharf Creek Bodkin Creek Mail Creek at Main Creek Wharf Creek Back Creek Mid Fork Mid at Fork

XHF8139 XHF7730 XHF7512 XHF7432 XHF8139 XHF7730 XHF7512 XHF7432 XHF8026

Total Phosphorus Total Nitrogen

0.2 3.2 0.15 2.4 1.6 0.1 mg/liter

mg/liter 0.8 0.05 0 0 Bodkin Mail Creek Main Creek Wharf Back Creek Bodkin Creek Mail Creek at Main Creek at Wharf Creek Back Creek Creek at Mid at Fork Creek Mid Fork

XHF8139 XHF7730 XHF7512 XHF7432 XHF8026 XHF8139 XHF7730 XHF7512 XHF7432 XHF8026

0.02 0.01 06/05/00 08/09/00 09/07/00 10/12/99 10/25/99 11/15/99 11/29/99 0

Bodkin Creek MailCreek at Mid MainCreek at Fork WharfCreek Back Creek XHF8139 XHF7730 XHF7512 XHF7432 XHF8026

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 53 Document version: August 22, 2007 BODKIN CREEK STATION LIST

Station Station Code Lat/Long Description Names

BODKIN CREEK XHF8139 Bodkin Creek 39 08.099 Approx. 350 ft east of markers G 9 and R 10. 76 26.078 Depth ~ 9 ft. MAIN CREEK XHF7730 Main Creek 39 07.720 Mid-channel, off Graveyard Point (Ventnor Marina). mid 76 26.986 Depth ~ 9 ft. XHF7512 Main Creek at 39 07.455 Head of creek, at confluence of forks. Forks 76 28.742 Depth ~ 4-5 ft. WHARF CREEK XHF7432 Wharf Creek 39 07.385 Mouth of creek between Old Bee Point and Orchard 76 26.758 Point. Depth ~ 8 ft. BACK CREEK XHF8026 Back Creek 39 07.854 Depth ~ 8 ft. 76 27.556

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 54 Document version: August 22, 2007 Jones Falls Jones Falls Monitoring Stations

Map Prepared by the Maryland Department of the Environment Science Services Administration Montgomery Park Business Center 1800 Washington Boulevard, Suite 540 Baltimore, Maryland 21230-1718

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 55 Document version: August 22, 2007 Jones Falls (main) High Flow Conditions (December-May) Stations are presented from left to right from downstream to upstream

Chlorophyll a Dissolved Oxygen

20 20 15 15 10 10

µg/liter 5 5 0 mg/liter 0 Rd. Rd. Falls Rd. Ave. Falls Rd. Ave. Sorrento Sorrento footbridge footbridge Ash Street Smith Ave. Stevenson Ash Street Smith Ave. Stevenson below dam below dam Run Comm. Run Comm. Brand Ave. Brand Ave. Inner Harbor Greenspring Inner Harbor Greenspring JON0001JON0039JON0054JON0071JON0082JON0184JON0124JON0135JON0149 JON0001JON0039JON0054JON0071JON0082JON0184JON0124JON0135JON0149

Total Suspended Solids Biological Oxygen Demand

160 6.0 120 4.5 80 3.0 mg/liter 40 mg/liter 1.5 0 0.0 Inner Rd. Harbor Rd. Falls Rd. Ave. Ave. Falls Rd. Sorrento footbridge Ash Street Smith Ave. Stevenson footbridge Sorrento below dam Ash Street Stevenson Run Comm. Brand Ave. Smith Ave. below dam Brand Ave. Inner Harbor Greenspring Run Comm. Greenspring JON0001JON0039JON0054JON0071JON0082JON0184JON0124JON0135JON0149 JON0001JON0039JON0054JON0071JON0082JON0184JON0124JON0135JON0149

01/06/1900

01/04/1900 12/14/1999 01/11/2000 01/24/2000 02/23/2000 02/29/2000 03/07/2000 03/08/2000 04/05/2000 01/02/1900

01/00/1900

Inner Harbor AshStreet Brand Ave. Smith Ave. footbridge below dam SorrentoRun Comm. FallsRd. GreenspringAve. Stevenson Rd. 05/02/2000 05/03/2000 05/24/2000

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 56 Document version: August 22, 2007 Jones Falls (main) High Flow Conditions (December-May) Stations are presented from left to right from downstream to upstream

Dissolved Inorganic Nitrogen Dissolved Inorganic Phosphorus

0.06 2.8 0.05 2.1 0.03 1.4

mg/liter 0.02

mg/liter 0.7 0.0 0.00 Inner Harbor Rd. Rd. Ave. Falls Rd. Ave. Falls Rd. Sorrento footbridge Sorrento Ash Street Stevenson footbridge below dam Ash Street Smith Ave. Stevenson Smith Ave. below dam Brand Ave. Run Comm. Brand Ave. Run Comm. Greenspring Inner Harbor Greenspring JON0001JON0039JON0054JON0071JON0082JON0184JON0124JON0135JON0149 JON0001JON0039JON0054JON0071JON0082JON0184JON0124JON0135JON0149

Total Nitrogen Total Phosphorus

2.8 0.28 2.1 0.21 1.4 0.14 mg/liter 0.7 mg/liter 0.07 0.0 0.00 Rd. Rd. Falls Rd. Ave. Falls Rd. Ave. Sorrento Sorrento footbridge footbridge Ash Street Smith Ave. Stevenson Ash Street Smith Ave. Stevenson below dam below dam Run Comm. Run Comm. Brand Ave. Brand Ave. Inner Harbor Greenspring Inner Harbor Greenspring JON0001JON0039JON0054JON0071JON0082JON0184JON0124JON0135JON0149 JON0001JON0039JON0054JON0071JON0082JON0184JON0124JON0135JON0149

01/06/1900 12/14/1999 01/11/2000 01/24/2000 02/23/2000 02/29/2000 03/07/2000 03/08/2000 04/05/2000 01/04/1900

01/02/1900 01/00/1900

Inner Harbor AshStreet Brand Ave. Smith Ave. footbridge below dam SorrentoRun Comm. FallsRd. GreenspringAve. Stevenson Rd. 05/02/2000 05/03/2000 05/24/2000

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 57 Document version: August 22, 2007 Jones Falls (main) Low Flow Conditions (June to November) Stations are presented from left to right from downstream to upstream

Chloropyll a Dissolved Oxygen

24 16 18 12 12 8

µg/liter 6 mg/liter 4 0 0 Rd. Rd. Falls Rd. Ave. Falls Rd. Ave. Sorrento Sorrento footbridge footbridge Ash Street Smith Ave. Stevenson Ash Street Smith Ave. Stevenson below dam below dam Run Comm. Run Comm. Brand Ave. Brand Ave. Inner Harbor Greenspring Inner Harbor Greenspring JON0001JON0039JON0054JON0071JON0082JON0184JON0124JON0135JON0149 JON0001JON0039JON0054JON0071JON0082JON0184JON0124JON0135JON0149

Total Suspended Solids Biological Oxygen Demand

24 6 18 5 12 3 mg/liter 6 mg/liter 2 0 0 Rd. Rd. Falls Rd. Ave. Falls Rd. Ave. Sorrento Sorrento footbridge footbridge Ash Street Smith Ave. Stevenson Ash Street Smith Ave. Stevenson below dam below dam Run Comm. Run Comm. Brand Ave. Brand Ave. Inner Harbor Greenspring Inner Harbor Greenspring JON0001JON0039JON0054JON0071JON0082JON0184JON0124JON0135JON0149 JON0001JON0039JON0054JON0071JON0082JON0184JON0124JON0135JON0149

01/06/1900 10/13/1999 10/26/1999 11/16/1999 11/30/1999 06/20/2000 07/11/2000 07/12/2000 08/01/2000 01/04/1900

01/02/1900

01/00/1900

Inner Harbor AshStreet Brand Ave. Smith Ave. footbridge below dam SorrentoRun Comm. FallsRd. GreenspringAve. Stevenson Rd. 08/02/2000 08/30/2000 08/31/2000

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 58 Document version: August 22, 2007 Jones Falls (main) Low Flow Conditions (June to November) Stations are presented from left to right from downstream to upstream

Dissolved Inorganic Nitrogen Dissolved Inorganic Phosphorus

2.2 0.04 1.7 0.03 1.1 0.02 0.6 0.01 mg/liter mg/liter 0.0 0.00 Rd. Rd. Falls Rd. Ave. Falls Rd. Ave. Sorrento Sorrento footbridge footbridge Ash Street Smith Ave. Stevenson Ash Street Smith Ave. Stevenson below dam below dam Run Comm. Run Comm. Brand Ave. Brand Ave. Inner Harbor Greenspring Inner Harbor Greenspring JON0001JON0039JON0054JON0071JON0082JON0184JON0124JON0135JON0149 JON0001JON0039JON0054JON0071JON0082JON0184JON0124JON0135JON0149

Total Nitrogen Total Phosphorus

2.8 0.10

2.1 0.08

1.4 0.05 mg/liter mg/liter 0.7 0.03

0.0 0.00 Rd. Rd. Falls Rd. Ave. Falls Rd. Ave. Sorrento footbridge Ash Street Smith Ave. Stevenson Sorrento below dam Run Comm. Brand Ave. footbridge Ash Street Smith Ave. Stevenson below dam Run Comm. Brand Ave. Inner Harbor Greenspring Inner Harbor Greenspring JON0001JON0039JON0054JON0071JON0082JON0184JON0124JON0135JON0149 JON0001JON0039JON0054JON0071JON0082JON0184JON0124JON0135JON0149

01/06/1900 10/13/1999 10/26/1999 11/16/1999 11/30/1999 06/20/2000 07/11/2000 07/12/2000 08/01/2000 01/04/1900

01/02/1900

01/00/1900

Inner Harbor AshStreet Brand Ave. Smith Ave. footbridge below dam SorrentoRun Comm. FallsRd. GreenspringAve. Stevenson Rd. 08/02/2000 08/30/2000 08/31/2000

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 59 Document version: August 22, 2007 Jones Falls (tributaries) High Flow Conditions (December-May) Stations are presented from left to right from downstream to upstream

Dissolved Oxygen Chlorophyll a

16 12 12 9 8 6 mg/liter 4 µg/liter 3 0 0 Stoney Run West Run Towson Run Roland Run Greenspring Stoney Run West Run Towson Roland Run Greenspring Valley Rd Run Valley Rd

SRU0005 WST0000 TOH0002 UQQ0005 UQM0008 SRU0005 WST0000 TOH0002 UQQ0005 UQM0008

Total Suspended Solids Biological Oxygen Demand

40 6

30 5

20 3 mg/liter mg/liter 10 2

0 0 Stoney Run West Run Towson Run Roland Run Greenspring Stoney Run West Run Towson Run Roland Run Greenspring Valley Rd Valley Rd

SRU0005 WST0000 TOH0002 UQQ0005 UQM0008 SRU0005 WST0000 TOH0002 UQQ0005 UQM0008

01/06/1900 01/04/1900 01/02/1900 01/00/1900

03/07/2000 Stoney Run 03/08/2000 West Run 04/04/2000 Towson Run 04/05/2000 Roland Run 05/02/2000 Greenspring Valley05/03/2000 Rd

SRU0005 WST0000 TOH0002 UQQ0005 UQM0008

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 60 Document version: August 22, 2007 Jones Falls (tributaries) High Flow Conditions (December-May) Stations are presented from left to right from downstream to upstream

Dissolved Inorganic Nitrogen Dissolved Inorganic Phosphorus

4 0

3 0

2 0 mg/liter 1 mg/liter 0 0 0 Stoney Run West Run Towson Roland Run Greenspring Stoney Run West Run Towson Run Roland Run Greenspring Run Valley Rd Valley Rd SRU0005 WST0000 TOH0002 UQQ0005 UQM0008 SRU0005 WST0000 TOH0002 UQQ0005 UQM0008

Total Nitrogen Total Phosphorus

4 1.2

3 0.9

2 0.6 mg/liter mg/liter 1 0.3

0 0.0 Stoney Run West Run Towson Run Roland Run Greenspring Stoney Run West Run Towson Run Roland Run Greenspring Valley Rd Valley Rd SRU0005 WST0000 TOH0002 UQQ0005 UQM0008 SRU0005 WST0000 TOH0002 UQQ0005 UQM0008

01/06/1900 01/04/1900 01/02/1900 01/00/1900

03/07/2000 Stoney Run 03/08/2000 West Run 04/04/2000 Towson Run 04/05/2000 Roland Run 05/02/2000 Greenspring Valley05/03/2000 Rd

SRU0005 WST0000 TOH0002 UQQ0005 UQM0008

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 61 Document version: August 22, 2007 Jones Falls (tributaries) Low Flow Conditions (June to November) Stations are presented from left to right from downstream to upstream

Chlorophyll a Dissolved Oxygen

24 16

18 12

12 8 µg/liter 6 mg/liter 4

0 0 Stoney Run West Run Roland Run Greenspring Stoney Run West Run Roland Run Greenspring Valley Rd Valley Rd

SRU0005 WST0000 UQM0005 UQM0008 SRU0005 WST0000 UQM0005 UQM0008

Total Suspended Solids Biological Oxygen Demand

8 8

6 6

4 4

mg/liter 2 mg/liter 2

0 0 Stoney Run West Run Roland Run Greenspring Stoney Run West Run Roland Run Greenspring Valley Rd Valley Rd

SRU0005 WST0000 UQM0005 UQM0008 SRU0005 WST0000 UQM0005 UQM0008

01/06/1900 10/13/1999 10/26/1999 11/16/1999 11/30/1999 06/20/2000 07/11/2000 07/12/2000 08/01/2000 01/04/1900

01/02/1900

01/00/1900

Inner Harbor AshStreet Brand Ave. Smith Ave. footbridge below dam SorrentoRun Comm. FallsRd. GreenspringAve. Stevenson Rd. 08/02/2000 08/30/2000 08/31/2000

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 62 Document version: August 22, 2007 Jones Falls (tributaries) Low Flow Conditions (June to November) Stations are presented from left to right from downstream to upstream

Dissolved Inorganic Nitrogen Dissolved Inorganic Phosphorus

2.8 0.06

2.1 0.05

1.4 0.03 mg/liter mg/liter 0.7 0.02

0.0 0.00 Stoney Run West Run Roland Run Greenspring Stoney Run West Run Roland Run Greenspring Valley Rd Valley Rd

SRU0005 WST0000 UQM0005 UQM0008 SRU0005 WST0000 UQM0005 UQM0008

Total Nitrogen Total Phosphorus

3.2 0.08

2.4 0.06

1.6 0.04 mg/liter mg/liter 0.8 0.02

0.0 0.00 Stoney Run West Run Roland Run Greenspring Stoney Run West Run Roland Run Greenspring Valley Rd Valley Rd

SRU0005 WST0000 UQM0005 UQM0008 SRU0005 WST0000 UQM0005 UQM0008

01/06/1900 10/13/1999 10/26/1999 11/16/1999 11/30/1999 06/20/2000 07/11/2000 07/12/2000 08/01/2000 01/04/1900

01/02/1900

01/00/1900

Inner Harbor AshStreet Brand Ave. Smith Ave. footbridge below dam SorrentoRun Comm. FallsRd. GreenspringAve. Stevenson Rd. 08/02/2000 08/30/2000 08/31/2000

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 63 Document version: August 22, 2007 JONES FALLS STATION LIST

Station Station Lat/Long Description Code Names

UPPER JONES FALLS JON0001 Inner Harbor 39 17.163 Bridge sample from Eastern Ave. extension near Baltimore 76 36.260 City historic pump house and Pier 6 Pavillion. Tidal. Station dropped after 4/14/00. JON0039 Ash Street 39 19.649 Sample at end of Ash Street (off Clipper Mill Road). 76 38.415 JON0054 Brand Ave 39 20.727 Bridge sample from driveway to Brand Ave (driveway to 76 38.966 Fleishmanns vinegar plant). Driveway is off west-bound Coldspring Lane. JON0071 Smith Ave. 39 22.065 Bridge sample off Smith Ave. in Mt. Washington. Site is 76 38.880 above confluence with Western Run. JON0082 footbridge 39 22.692 Take sample from footbridge below dam (off Lakeside Dr). below dam 76 38.661 Measure flow in one of three flumes below dam. JON0184 Sorrento Run 39 23.466 Take bank sample along Falls Road opposite Sorrento Run comm. 76 39.662 community. JON0124 Falls Rd 39 24.863 Bridge sample from Falls Rd., just outside beltway. 76 40.071 JON0135 Greenspring 39 24.885 Bridge sample from Greenspring Ave. Ave. 76 41.315 JON0149 Stevenson 39 24.738 Bridge sample from Stevenson Rd. Rd. 76 42.823 STONEY RUN SRU0005 Stoney Run 39 19.550 Bank sample at bottom of paved jogging trail starting at 76 37.562 west side of Remington Ave. bridge. Park on trail. Measure flow and record staff height under bridge. WEST RUN WST0000 West Run 39 22.042 Bridge sample at Cottonworth Ave. Measure flow and 76 38.941 record staff height under JFX bridge. Need to drive up and park in framing shop parking lot (just before Smith St. curves around). Walk down steps and under bridge to find staff. TOWSON RUN TOH0002 Towson Run 39 23.373 Bank sample near Bellona Ave. bridge. Station dropped after 76 38.459 4/14/00. ROLAND RUN UQQ0005 Roland Run 30 23.918 Bridge sample at Circle Rd. Station dropped after 4/14/00. 76 38.927 NORTH BRANCH (tributary of Jones Falls) UQM0008 Greenspring 39 25.345 Bridge sample at Greenspring Valley Rd. Valley Rd. 76 42.633

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 64 Document version: August 22, 2007 Gwynns Falls Gwynns Falls Monitoring Stations

Map Prepared by the Maryland Department of the Environment Science Services Administration Montgomery Park Business Center 1800 Washington Boulevard, Suite 540 Baltimore, Maryland 21230-1718

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 65 Document version: August 22, 2007 Gwynns Falls (main) High Flow Conditions (December-May) Stations are presented from left to right from downstream to upstream

Chlorophyll a Dissolved Oxygen

16 16 12 12 8 8 µg/liter 4 mg/liter 4 0 0

Essex Rd Essex Rd Wilkens Ave Wilkens Ave Annapolis Rd Milford Mill Rd Annapolis Rd Milford Mill Rd Gwynn Oak Rd McDonough Rd Gwynn Oak Rd McDonough Rd Franklintown Rd ReisterstownGwynnbrook Rd Ave Franklintown Rd ReisterstownGwynnbrook Rd Ave Carroll Park USGS Carroll Park USGS

Total Suspended Solids Biological Oxygen Demand

160 8 120 6 80 4 mg/liter 40 mg/liter 2 0 0

Essex Rd Essex Rd Wilkens Ave Wilkens Ave Annapolis Rd Milford Mill Rd Annapolis Rd Milford Mill Rd Gwynn Oak Rd McDonough Rd Gwynn Oak Rd McDonough Rd Franklintown Rd Reisterstown Rd Franklintown Rd Reisterstown Rd Carroll Park USGS Gwynnbrook Ave Carroll Park USGS Gwynnbrook Ave

15 10 5 0

Annapolis12/14/1999 Rd Carroll Park USGS 01/11/2000 Wilkens Ave Franklintown01/24/2000 Rd GwynnOak Rd 02/23/2000 EssexRd 02/29/2000 Milford Mill Rd McDonough Rd 03/08/2000 ReisterstownRd 05/03/2000 Gwynnbrook Ave

GWN0004 GWN0015 GWN0024 GWN0050 GWN0080 GWN0115 GWN0125 GWN0160 GWN0186 GWN0215

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 66 Document version: August 22, 2007 Gwynns Falls (main) High Flow Conditions (December-May) Stations are presented from left to right from downstream to upstream

Dissolved Inorganic Nitrogen Dissolved Inorganic Phosphorus

3.2 0.08 2.4 0.06 1.6 0.04 mg/liter

0.8 mg/liter 0.02 0.0 0.00

Essex Rd Essex Rd Wilkens Ave Wilkens Ave Annapolis Rd Milford Mill Rd Annapolis Rd Milford Mill Rd Gwynn Oak Rd McDonough Rd Gwynn Oak Rd McDonough Rd Franklintown Rd Reisterstown Rd Franklintown Rd Reisterstown Rd Carroll Park USGS Gwynnbrook Ave Carroll Park USGS Gwynnbrook Ave

Total Nitrogen Total Phosphorus

3.2 1.2 2.4 0.9 1.6 0.6 mg/liter

0.8 mg/liter 0.3 0.0 0.0

Essex Rd Essex Rd Wilkens Ave Annapolis Rd Annapolis Rd Wilkens Ave Gwynn Oak Rd Milford Mill Rd Milford Mill Rd Franklintown Rd McDonough Rd Gwynn Oak Rd McDonough Rd ReisterstownGwynnbrook Rd Ave Franklintown Rd Reisterstown Rd Carroll Park USGS Carroll Park USGS Gwynnbrook Ave

15 10 5 0

Annapolis12/14/1999 Rd Carroll Park USGS 01/11/2000 Wilkens Ave Franklintown01/24/2000 Rd GwynnOak Rd 02/23/2000 EssexRd 02/29/2000 Milford Mill Rd McDonough Rd 03/08/2000 ReisterstownRd 05/03/2000 Gwynnbrook Ave

GWN0004 GWN0015 GWN0024 GWN0050 GWN0080 GWN0115 GWN0125 GWN0160 GWN0186 GWN0215

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 67 Document version: August 22, 2007 Gwynns Falls (main) Low Flow Conditions (June to November) Stations are presented from left to right from downstream to upstream

Dissolved Oxygen Chlorophyll a

16 3.2 2.4 12 1.6 8

µg/liter 0.8 mg/liter 4 0.0 0

Essex Rd Essex Rd Milford Mill Rd Milford Mill Rd Gwynn Oak Rd McDonough Rd Gwynn Oak Rd McDonough Rd Franklintown Rd Reisterstown Rd Franklintown Rd Reisterstown Rd Carroll Park USGS Gwynnbrook Ave Carroll Park USGS Gwynnbrook Ave

Total Suspended Solids Biological Oxygen Demand

32 8 24 6 16 4 mg/liter mg/liter 8 2 0 0

Essex Rd Essex Rd Milford Mill Rd Milford Mill Rd Gwynn Oak Rd McDonough Rd Gwynn Oak Rd McDonough Rd Franklintown Rd Reisterstown Rd Franklintown Rd Reisterstown Rd Carroll Park USGS Gwynnbrook Ave Carroll Park USGS Gwynnbrook Ave

15 10 5 0

Carroll Park USGS FranklintownRd GwynnOak Rd EssexRd Milford Mill Rd McDonough Rd ReisterstownRd Gwynnbrook Ave 06/20/2000 07/12/2000 08/02/2000 08/31/2000 10/13/1999 10/26/1999 11/16/1999 11/30/1999

GWN0015 GWN0050 GWN0080 GWN0115 GWN0125 GWN0160 GWN0186 GWN0215

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 68 Document version: August 22, 2007 Gwynns Falls (main) Low Flow Conditions (June to November) Stations are presented from left to right from downstream to upstream

Dissolved Inorganic Nitrogen Dissolved Inorganic Phosphorus

3.2 0.04 2.4 0.03 1.6 0.02 mg/liter mg/liter 0.8 0.01 0 0

Essex Rd Essex Rd Milford Mill Rd Milford Mill Rd Gwynn Oak Rd McDonough Rd Gwynn Oak Rd McDonough Rd Franklintown Rd Reisterstown Rd Franklintown Rd Reisterstown Rd Carroll Park USGS Gwynnbrook Ave Carroll Park USGS Gwynnbrook Ave

Total Nitrogen Total Phosphorus

3.2 1.2 2.4 0.9 1.6 0.6

mg/liter 0.8 mg/liter 0.3 0 0

Essex Rd Essex Rd Milford Mill Rd Milford Mill Rd Gwynn Oak Rd McDonough Rd Gwynn Oak Rd McDonough Rd Franklintown Rd Reisterstown Rd Franklintown Rd Reisterstown Rd Carroll Park USGS Gwynnbrook Ave Carroll Park USGS Gwynnbrook Ave

15 10 5 0

Carroll Park USGS FranklintownRd GwynnOak Rd EssexRd Milford Mill Rd McDonough Rd ReisterstownRd Gwynnbrook Ave 06/20/2000 07/12/2000 08/02/2000 08/31/2000 10/13/1999 10/26/1999 11/16/1999 11/30/1999

GWN0015 GWN0050 GWN0080 GWN0115 GWN0125 GWN0160 GWN0186 GWN0215

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 69 Document version: August 22, 2007 Gwynns Falls (tributaries) High Flow Conditions (December-May) Stations are presented from left to right from downstream to upstream

Dissolved Oxygen Chlorophyll a

16 16 12 12 8 8 mg/liter µg/liter 4 4 0 0 Maidens Choice Dead Run Scotts Level Red Run Maidens Choice Dead Run Scotts Level Red Run Branch Branch MRC0001 DDR0001 UHX0001 RDR0001 MRC0001 DDR0001 UHX0001 RDR0001

Total Suspended Solids Biological Oxygen Demand

32 16 24 12 16 8 mg/liter 8 mg/liter 4 0 0 Maidens Choice Dead Run Scotts Level Red Run Maidens Choice Dead Run Scotts Level Red Run Branch Branch

MRC0001 DDR0001 UHX0001 RDR0001 MRC0001 DDR0001 UHX0001 RDR0001

15 10 5 0

MaidensChoice 03/08/2000 Dead Run 04/04/2000 ScottsLevel Branch 05/03/2000RedRun

MRC0001 DDR0001 UHX0001 RDR0001

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 70 Document version: August 22, 2007 Gwynns Falls (tributaries) High Flow Conditions (December-May) Stations are presented from left to right from downstream to upstream

Dissolved Inorganic Nitrogen Dissolved Inorganic Phosphorus

2 0.08 1.5 0.06

1 0.04 mg/liter 0.5 mg/liter 0.02

0 0 Maidens Choice Dead Run Scotts Level Red Run Maidens Choice Dead Run Scotts Level Red Run Branch Branch

MRC0001 DDR0001 UHX0001 RDR0001 MRC0001 DDR0001 UHX0001 RDR0001

Total Nitrogen Total Phosphorus

2.8 0.16

2.1 0.12

1.4 0.08 mg/liter mg/liter 0.7 0.04

0 0 Maidens Choice Dead Run Scotts Level Red Run Maidens Choice Dead Run Scotts Level Red Run Branch Branch

MRC0001 DDR0001 UHX0001 RDR0001 MRC0001 DDR0001 UHX0001 RDR0001

15 10 5 0

MaidensChoice 03/08/2000 Dead Run 04/04/2000 ScottsLevel Branch 05/03/2000RedRun

MRC0001 DDR0001 UHX0001 RDR0001

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 71 Document version: August 22, 2007 Gwynns Falls (tributaries) Low Flow Conditions (June to November) Stations are presented from left to right from downstream to upstream

Dissolved Oxygen Chlorophyl a

2.4 10

1.8 7.5

1.2 5 µg/liter mg/liter 0.6 2.5

0 0 Dead Run Scotts Level Branch Red Run Dead Run Scotts Level Branch Red Run

DDR0001 UHX0001 RDR0001 DDR0001 UHX0001 RDR0001

Total Suspended Solids Biological Oxygen Demand

16 8

12 6

8 4 mg/liter mg/liter 4 2

0 0 Dead Run Scotts Level Branch Red Run Dead Run Scotts Level Branch Red Run

DDR0001 UHX0001 RDR0001 DDR0001 UHX0001 RDR0001

10

5 0 07/12/2000Dead Run 08/02/2000ScottsLevel Branch 08/31/2000RedRun

DDR0001 UHX0001 RDR0001

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 72 Document version: August 22, 2007 Gwynns Falls (tributaries) Low Flow Conditions (June to November) Stations are presented from left to right from downstream to upstream

Dissolved Inorganic Phosphorus Dissolved Inorganic Nitrogen

0.12 4 0.09 3 0.06 2 mg/liter mg/liter 0.03 1

0 0 Dead Run Scotts Level Branch Red Run Dead Run Scotts Level Branch Red Run DDR0001 UHX0001 RDR0001 DDR0001 UHX0001 RDR0001

Total Nitrogen Total Phosphorus

6 0.28

4.5 0.21

3 0.14 mg/liter mg/liter 1.5 0.07

0 0 Dead Run Scotts Level Branch Red Run Dead Run Scotts Level Branch Red Run DDR0001 UHX0001 RDR0001 DDR0001 UHX0001 RDR0001

10

5 0 07/12/2000Dead Run 08/02/2000ScottsLevel Branch 08/31/2000RedRun

DDR0001 UHX0001 RDR0001

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 73 Document version: August 22, 2007 GWYNNS FALLS STATION LIST

Station Station Lat/Long Description Code Names GWYNNS FALLS GWN0004 Annapolis Rd 39 16.140 Bridge sample from Annapolis Rd. Take 295N (Russell St) 76 37.800 and turn near RESCO plant onto Annapolis Rd. Tidal. Station dropped after 4/14/00. GWN0015 Carroll Park 39 16.252 In Carroll Park Golf Course, off Washington Blvd. Sample off USGS 76 38.897 golf cart path which parallels river. USGS gage. GWN0024 Wilkens Ave. 39 16.140 Bridge sample (bring milk crate and 2 ropes) or bank sample 76 39.705 at Wilkens Ave. Station dropped after 4/14/00. GWN0050 Franklintown 39 18.365 Bridge sample at Franklintown Rd. Rd. 76 40.726

GWN0080 Gwynn Oak 39 19.515 Bridge sample at Gwynn Oak Rd. Try to read staff gage on Rd. 76 42.870 Purnell Dr. GWN0115 Essex Road 39 20.759 Bridge sample at Essex Road. Located inside beltway (695) 76 44.048 off Liberty Road (Rte 26). GWN0125 Milford Mill 39 21.595 Bridge sample at Milford Mill Rd. Wier upstream is 50 ft Rd. 76 44.705 wide.

GWN0160 McDonough 39 23.493 Bridge sample at McDonough Rd. Park on west-bound side Rd 76 45.915 pull-off. GWN0186 Reisterstown 39 25.279 Bridge sample at Reisterstown Rd. Rd. 76 46.910

GWN0215 Gwynnbrook 39 26.587 Bridge sample at Gwynnbrook Ave. Ave 76 46.990 MAIDEN’S CHOICE MCR0001 Maiden’s 39 16.579 Sample from top of concrete tunnel passing under Dukeland Choice 76 39.737 St. Try to read staff gage 75’ upstream of Wilkens Ave crossing. Station dropped after 4/14/00. DEAD RUN DDR0001 Dead Run 39 18.318 Bridge sample at Wethersfield Rd (closed to traffic). Good 76 41.185 flow site 50 yds. upstream of bridge. Read staff under footbridge and take flow (no staff conversion). SCOTTS LEVEL BRANCH UHX0001 Scotts Level 39 21.610 Bridge sample at Scotts Hill Rd (not Scotts Level Rd.). May Branch 76 44.773 be too rocky for flow. RED RUN RDR0001 Red Run 39 24.270 Bank sample at Painters Mill Rd. Park in ”South Station 76 46.755 General Parking” for the Metro. Good flow site under bridge.

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 74 Document version: August 22, 2007 Patapsco River – Lower North Branch

Patapsco River Lower North Branch Monitoring Stations

Map Prepared by the Maryland Department of the Environment Science Services Administration Montgomery Park Business Center 1800 Washington Boulevard, Suite 540 Baltimore, Maryland 21230-1718

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 75 Document version: August 22, 2007 Patapsco River Lower North Branch (main) High Flow Conditions (December-May) Stations are presented from left to right from downstream to upstream

Chlorophyll a Dissolved Oxygen

12 16 9 6 12 3 µg/liter 0 8 mg/liter 4 Blvd Rd Ferry Rd Ct Rd

Hammonds 0 Washington Ilchester Rd

Old Frederick Hammonds Washington Ilchester Rd Old Old Ct Rd Woodstock/Old Ferry Rd Blvd Frederick Rd PAT0148 PAT0176 PAT0222 PAT0285 PAT0347 PAT0148 PAT0176 PAT0222 PAT0285 PAT0347

Total Suspended Solids Biological Oxygen Demand

80 6 5 60 3

mg/liter 2 40 0 mg/liter 20 Rd 0 Blvd Ferry Rd Ct Rd Hammonds Hammonds Washington Ilchester Rd Old Old Ct Rd Washington Ilchester Rd Old Frederick

Ferry Rd Blvd Frederick Rd Woodstock/Old PAT0148 PAT0176 PAT0222 PAT0285 PAT0347 PAT0148 PAT0176 PAT0222 PAT0285 PAT0347

01/10/1900 01/05/1900 01/00/1900

12/14/1999 Hammonds Ferry Rd 01/11/2000 01/24/2000 Washington Blvd 02/23/2000 02/29/2000 Ilchester Rd 03/15/2000 Old Frederick04/12/2000 Rd 05/10/2000 Woodstock/OldCt Rd 05/24/2000

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 76 Document version: August 22, 2007 Patapsco River Lower North Branch (main) High Flow Conditions (December-May) Stations are presented from left to right from downstream to upstream

Dissolved Inorganic Nitrogen Dissolved Inorganic Phosphorus

4.0 0.06 3.0 0.05 2.0 0.03

mg/liter 1.0 0.02 0.0 mg/liter 0.00 Blvd Rd Blvd Rd Ferry Rd Ferry Rd Ct Rd Ct Rd Hammonds Hammonds Washington Ilchester Rd Washington Ilchester Rd Old Frederick Old Frederick Woodstock/Old Woodstock/Old PAT0148 PAT0176 PAT0222 PAT0285 PAT0347 PAT0148 PAT0176 PAT0222 PAT0285 PAT0347

Total Nitrogen Total Phosphorus

4.0 0.12 3.0 0.09 2.0 0.06 mg/liter 1.0 mg/liter 0.0 0.03

0.00 Hammonds Washington Ilchester Rd Old Old Ct Rd Blvd Rd Ferry Rd Ct Rd Ferry Rd Blvd Frederick Hammonds Washington Ilchester Rd

Old Frederick Rd Woodstock/Old PAT0148 PAT0176 PAT0222 PAT0285 PAT0347 PAT0148 PAT0176 PAT0222 PAT0285 PAT0347

01/10/1900 01/05/1900 01/00/1900

12/14/1999 Hammonds Ferry Rd 01/11/2000 01/24/2000 Washington Blvd 02/23/2000 02/29/2000 Ilchester Rd 03/15/2000 Old Frederick04/12/2000 Rd 05/10/2000 Woodstock/OldCt Rd 05/24/2000

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 77 Document version: August 22, 2007 Patapsco River Lower North Branch (main) Low Flow Conditions (June to November) Stations are presented from left to right from downstream to upstream

Dissolved Oxygen Chlorophyll a

8 16 6 12 8 4 4 mg/liter µg/liter 2 0 0 Rd Blvd Blvd Rd Ferry Rd Ct Rd Hammonds Ferry Rd Ct Rd Washington Ilchester Rd Hammonds Washington Ilchester Rd Old Frederick Old Frederick Woodstock/Old Woodstock/Old PAT0148 PAT0176 PAT0222 PAT0285 PAT0347 PAT0148 PAT0176 PAT0222 PAT0285 PAT0347

Total Suspended Solids Biological Oxygen Demand

32 5 24 4 16 2 mg/liter mg/liter 8 1 0 0 Blvd Rd Blvd Rd Ferry Rd Ferry Rd Ct Rd Ct Rd Hammonds Hammonds Washington Ilchester Rd Washington Ilchester Rd Old Frederick Old Frederick Woodstock/Old Woodstock/Old PAT0148 PAT0176 PAT0222 PAT0285 PAT0347 PAT0148 PAT0176 PAT0222 PAT0285 PAT0347

01/00/1900 01/00/1900 01/00/1900 01/00/1900 Hammonds Ferry Rd Washington Blvd Ilchester Rd Old Frederick Rd Woodstock/Old Ct Rd

06/20/2000 PAT0148 08/09/2000 PAT0176 09/07/2000 10/13/1999 PAT0222 10/26/1999 PAT0285 11/16/1999 PAT0347 11/30/1999

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 78 Document version: August 22, 2007 Patapsco River Lower North Branch (main) Low Flow Conditions (June to November) Stations are presented from left to right from downstream to upstream

Dissolved Inorganic Nitrogen Dissolved Inorganic Phosphorus

3.2 0.06 2.4 0.05 1.6 0.03 0.8 mg/liter

mg/liter 0.02 0.0 0.00 Blvd Rd Blvd Rd Ferry Rd Ct Rd Ferry Rd Ct Rd Hammonds Washington Ilchester Rd Hammonds Washington Ilchester Rd Old Frederick Old Frederick Woodstock/Old Woodstock/Old PAT0148 PAT0176 PAT0222 PAT0285 PAT0347 PAT0148 PAT0176 PAT0222 PAT0285 PAT0347

Total Nitrogen Total Phosphorus

3.2 0.12 2.4 0.09 1.6 0.06 mg/liter mg/liter 0.8 0.03 0.0 0.00 Blvd Rd Blvd Rd Ferry Rd Ferry Rd Ct Rd Ct Rd Hammonds Hammonds Washington Ilchester Rd Washington Ilchester Rd Old Frederick Old Frederick Woodstock/Old Woodstock/Old PAT0148 PAT0176 PAT0222 PAT0285 PAT0347 PAT0148 PAT0176 PAT0222 PAT0285 PAT0347

01/00/1900 01/00/1900 01/00/1900 01/00/1900 Hammonds Ferry Rd Washington Blvd Ilchester Rd Old Frederick Rd Woodstock/Old Ct Rd

06/20/2000 PAT0148 08/09/2000 PAT0176 09/07/2000 10/13/1999 PAT0222 10/26/1999 PAT0285 11/16/1999 PAT0347 11/30/1999

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 79 Document version: August 22, 2007 Patapsco River Lower North Branch (tributaries) High Flow Conditions (December-May) Stations are presented from left to right from downstream to upstream

Chlorophyll a Dissolved Oxygen

16 12

9 12

6 8 µg/liter mg/liter 3 4

0 0 Stony Run Deep Run Herbert Dogwood Brices North Stony Deep Run Herbert Dogwood Brices North Run Run Run Branch P. Run Run Run Run Branch P. SRX0002 DXC0004 EBH0005 DGW0002 BCN0003 NPA0026 SRX0002 DXC0004 EBH0005 DGW0002 BCN0003 NPA0026

Total Suspended Solids Bological Oxygen Demand

8 6

6 5

4 3 mg/liter 2 mg/liter 2

0 0 Stony Run Deep Run Herbert Dogwood Brices North Deep Run Herbert Run Dogwood Brices Run North Run Run Run Branch P. Run Branch P.

SRX0002 DXC0004 EBH0005 DGW0002 BCN0003 NPA0026 DXC0004 EBH0005 DGW0002 BCN0003 NPA0026

01/15/1900 01/10/1900 01/05/1900 01/00/1900

StonyRun Deep Run HerbertRun Dogwood Run Brices Run NorthBranch P. 12/14/1999 01/11/2000 01/24/2000 02/23/2000 02/29/2000 03/15/2000 04/12/2000 05/10/2000 05/24/2000

SRX0002 DXC0004 EBH0005 DGW0002 BCN0003 NPA0026

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 80 Document version: August 22, 2007 Patapsco River Lower North Branch (tributaries) High Flow Conditions (December-May) Stations are presented from left to right from downstream to upstream

Dissolved Inorganic Nitrogen Dissolved Inorganic Phosphorus

2.8 0.012

2.1 0.009 1.4 0.006 mg/liter 0.7 mg/liter 0.003 0.0 0.000 Stony Run Deep Run Herbert Dogwood Brices North Stony Run Deep Run Herbert Dogwood Brices North Run Run Run Branch P. Run Run Run Branch P. SRX0002 DXC0004 EBH0005 DGW0002 BCN0003 NPA0026 SRX0002 DXC0004 EBH0005 DGW0002 BCN0003 NPA0026

Total Nitrogen Total Phosphorus

3.2 1.2

2.4 0.9

1.6 0.6

mg/liter 0.8 mg/liter 0.3

0.0 0.0 Stony Run Deep Run Herbert Dogwood Brices North Stony Run Deep Run Herbert Dogwood Brices North Run Run Run Branch P. Run Run Run Branch P.

SRX0002 DXC0004 EBH0005 DGW0002 BCN0003 NPA0026 SRX0002 DXC0004 EBH0005 DGW0002 BCN0003 NPA0026

01/15/1900 01/10/1900 01/05/1900 01/00/1900

StonyRun Deep Run HerbertRun Dogwood Run Brices Run NorthBranch P. 12/14/1999 01/11/2000 01/24/2000 02/23/2000 02/29/2000 03/15/2000 04/12/2000 05/10/2000 05/24/2000

SRX0002 DXC0004 EBH0005 DGW0002 BCN0003 NPA0026

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 81 Document version: August 22, 2007 Patapsco River Lower North Branch (tributaries) Low Flow Conditions (June to November) Stations are presented from left to right from downstream to upstream

Chlorophyll a Dissolved Oxygen

2.0 12

1.5 9

1.0 6 µg/liter 0.5 mg/liter 3

0.0 0 Stoney Deep Run Herbert Dogwood Brices North Stoney Deep Run Herbert Dogwood Brices North Run Run Run Run Branch P. Run Run Run Run Branch P.

SXR0002 DXC0004 EBH0005 DGW0002 BCN0003 NPA0026 SXR0002 DXC0004 EBH0005 DGW0002 BCN0003 NPA0026

Total Suspended Solids Biological Oxygen Demand

10 4

8 3

5 2 mg/liter mg/liter 3 1

0 0 Stoney Deep Run Herbert Dogwood Brices North Deep Run Herbert Run Dogwood Brices Run North Run Run Run Run Branch P. Run Branch P.

SXR0002 DXC0004 EBH0005 DGW0002 BCN0003 NPA0026 DXC0004 EBH0005 DGW0002 BCN0003 NPA0026

01/12/1900 01/10/1900 01/08/1900 01/06/1900 01/04/1900 01/02/1900

01/00/1900 06/20/2000 08/09/2000 09/07/2000 10/13/1999 10/26/1999 11/16/1999 11/30/1999 Stoney Run Deep Run Herbert Run Dogwood Run Brices Run North Branch P.

SXR0002 DXC0004 EBH0005 DGW0002 BCN0003 NPA0026

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 82 Document version: August 22, 2007 Patapsco River Lower North Branch (tributaries) Low Flow Conditions (June to November) Stations are presented from left to right from downstream to upstream

Dissolved Inorganic Nitrogen Dissolved Inorganic Phosphorus

2.8 0.028 2.1 0.021 1.4 0.014

mg/liter 0.7 mg/liter 0.007 0.0 0.000 Stoney Deep Run Herbert Dogwood Brices North Stoney Deep Run Herbert Dogwood Brices North Run Run Run Run Branch P. Run Run Run Run Branch P.

SXR0002 DXC0004 EBH0005 DGW0002 BCN0003 NPA0026 SXR0002 DXC0004 EBH0005 DGW0002 BCN0003 NPA0026

Total Nitrogen Total Phosphorus

2.8 0.06

2.1 0.05 1.4 0.03

mg/liter 0.7 mg/liter 0.02 0.0 0.00 Stoney Deep Run Herbert Dogwood Brices North Stoney Deep Run Herbert Dogwood Brices North Run Run Run Run Branch P. Run Run Run Run Branch P.

SXR0002 DXC0004 EBH0005 DGW0002 BCN0003 NPA0026 SXR0002 DXC0004 EBH0005 DGW0002 BCN0003 NPA0026

01/12/1900 01/10/1900 01/08/1900 01/06/1900 01/04/1900 01/02/1900

01/00/1900 06/20/2000 08/09/2000 09/07/2000 10/13/1999 10/26/1999 11/16/1999 11/30/1999 Stoney Run Deep Run Herbert Run Dogwood Run Brices Run North Branch P.

SXR0002 DXC0004 EBH0005 DGW0002 BCN0003 NPA0026

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 83 Document version: August 22, 2007 LOWER NORTH BRANCH PATAPSCO STATION LIST

Station Station Code Lat/Long Description Names PATAPSCO RIVER PAT0148 Hammonds 39 13.864 Hammonds Ferry Road Crossing Ferry Rd. 76 39.872 Baltimore ADC Map 42 E-11 PAT0176 Wash. Blvd 39 13.059 Route 1 (Washington Boulevard) Crossing 76 42.394 Baltimore ADC Map 41 J-13 PAT0222 Ilchester Rd 39 15.052 Ilchester Road Crossing. Park on south side near RR 76 45.852 tracks. Bank sample. PAT0285 Old Frederick 39 18.609 Old Frederick Road Crossing. Bank sample. Rd. 76 47.549 Baltimore ADC Map 32 F-9 PAT0347 Old Court Road 39 19.908 Woodstock/Old Court Road Crossing. Bank sample under 76 52.197 bridge from RR track side. HERBERT RUN EBH0005 Herbert Run 39 13.877 Route 1 – heading north on Route 1 (Southwestern 76 41.527 Boulevard) Crossing. Try flow upstream - you may have electrical interference. STONY RUN SXR0002 Stony Run 39 12.730 Furnace Avenue Crossing. Try to take flow – may have 76 41.698 electrical interference. Anne Arundel ADC Map 1 J-6 DEEP RUN DXC0004 Deep Run 39 12.651 Furnace Avenue Crossing 76 42.124 Anne Arundel ADC Map 1 J-6 DOGWOOD RUN DGW0002 Dogwood Run 39 18.931 Dogwood Road Crossing 76 47.599 Baltimore ADC Map 32 F-8 BRICE’S RUN BCN0003 Brice’s Run 39 19.350 Wrights Mill Road Crossing 76 49.461 Baltimore ADC Map 32 A-7 NORTH BRANCH PATAPSCO NPA0026 Marriotsville 39 21.879 Marriotsville Road Crossing Rd 76 53.104 Baltimore ADC Map 23 B-12

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 84 Document version: August 22, 2007 Liberty Reservoir

Liberty Reservoir Monitoring Stations

Map Prepared by the Maryland Department of the Environment Science Services Administration Montgomery Park Business Center 1800 Washington Boulevard, Suite 540 Baltimore, Maryland 21230-1718

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 85 Document version: August 22, 2007 Liberty Reservoir (main) High Flow Conditions (December-May) Stations are presented from left to right from downstream to upstream

Chlorophyll a Dissolved Oxygen

12 16 9 12 6 8 µg/liter 3 mg/liter 4 0 0 nr. nr. Bridge Bridge nr OM Liberty Liberty Liberty Beaver nr OM Liberty Liberty Liberty Beaver nr Cove nr Cove Liberty R. Liberty R. Liberty R. Liberty R. Liberty R. Liberty R. Liberty R. Liberty R. Liberty R. Liberty R. Reservoir Reservoir Reservoir Reservoir Reservoir Reservoir Liberty R. Liberty R. H20 Intake H20 Intake NPA0038NPA0059NPA0071NPA0085NPA0101NPA0116NPA0130NPA0155NPA0164 NPA0038NPA0059NPA0071NPA0085NPA0101NPA0116NPA0130NPA0155NPA0164

Total Suspended Solids Biological Oxygen Demand

12 2.8 9 2.1 6 1.4 mg/liter

3 mg/liter 0.7 0 0 nr. 1 2 3 nr. Bridge nr OM Liberty Liberty Liberty Beaver H20 Run nr Cove Point Intake Bridge Liberty R. Liberty R. Liberty R. Liberty R. Liberty R. Liberty Liberty Liberty Reservoir Reservoir Reservoir nr OM Beaver Liberty R. nr Cove H20 Intake Crossing Liberty R. Liberty R. Liberty R. Liberty R. Liberty R. Liberty R. Reservoir Reservoir Reservoir NPA0038NPA0059NPA0071NPA0085NPA0101NPA0116NPA0130NPA0155NPA0164 NPA0038NPA0059NPA0071NPA0085NPA0101NPA0116NPA0130NPA0155NPA0164

5 4 3 2 1 0 Liberty R. H20 Intake Liberty R. Bridge Liberty R. nr Cove Liberty R. nr OM Point Liberty Reservoir 1 Liberty Reservoir 2 Liberty R. nr. Crossing Liberty Reservoir 3 Liberty R. Beaver Run

NPA0038 03/14/2000 NPA0059 NPA0071 NPA0085 04/11/2000 NPA0101 NPA0116 NPA0130 05/09/2000 NPA0155 NPA0164

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 86 Document version: August 22, 2007 Liberty Reservoir (main) High Flow Conditions (December-May) Stations are presented from left to right from downstream to upstream

Dissolved Inorganic Phosphorus Dissolved Inorganic Nitrogen

0.0022 4.8 3.6 0.00165 2.4 0.0011

1.2 mg/liter mg/liter 0.00055 0 0 nr. 1 2 3 nr. Bridge nr OM Liberty Liberty Liberty Beaver H20 Run nr Cove Point Intake Bridge Liberty R. Liberty R. Liberty R. Liberty R. Liberty R. Liberty Liberty Liberty Reservoir Reservoir Reservoir nr OM Beaver Liberty R. nr Cove H20 Intake Crossing Liberty R. Liberty R. Liberty R. Liberty R. Liberty R. Liberty R. Reservoir Reservoir Reservoir NPA0038NPA0059NPA0071NPA0085NPA0101NPA0116NPA0130NPA0155NPA0164 NPA0038NPA0059NPA0071NPA0085NPA0101NPA0116NPA0130NPA0155NPA0164

Total Nitrogen Total Phosphorus

4.8 1.2 3.6 0.9 2.4 0.6

mg/liter 1.2 mg/liter 0.3 0 0 nr. nr. Bridge Bridge nr OM Liberty Liberty Liberty Beaver nr OM Liberty Liberty Liberty Beaver nr Cove nr Cove Liberty R. Liberty R. Liberty R. Liberty R. Liberty R. Liberty R. Liberty R. Liberty R. Liberty R. Liberty R. Reservoir Reservoir Reservoir Reservoir Reservoir Reservoir Liberty R. Liberty R. H20 Intake H20 Intake NPA0038NPA0059NPA0071NPA0085NPA0101NPA0116NPA0130NPA0155NPA0164 NPA0038NPA0059NPA0071NPA0085NPA0101NPA0116NPA0130NPA0155NPA0164

5 4 3 2 1 0 Liberty R. H20 Intake Liberty R. Bridge Liberty R. nr Cove Liberty R. nr OM Point Liberty Reservoir 1 Liberty Reservoir 2 Liberty R. nr. Crossing Liberty Reservoir 3 Liberty R. Beaver Run

NPA0038 03/14/2000 NPA0059 NPA0071 NPA0085 04/11/2000 NPA0101 NPA0116 NPA0130 05/09/2000 NPA0155 NPA0164

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 87 Document version: August 22, 2007 Liberty Reservoir (main) Low Flow Conditions (June to November) Stations are presented from left to right from downstream to upstream

Chlorophyll a Dissolved Oxygen

40 12 30 9 20 6 µg/liter 10 mg/liter 3 0 0 1 2 3 1 2 3 nr nr H20 Run H20 Run Point Point Intake Intake Bridge Bridge Liberty Liberty Liberty Liberty Liberty Liberty Liberty Liberty Beaver Beaver nr OM nr OM nr Cove nr Cove Liberty R. Liberty R. Liberty R. Liberty R. Reservoir Reservoir Reservoir Reservoir Liberty R. Liberty R. Liberty R. Liberty R. Liberty R. Reservoir Reservoir Reservoir Reservoir Liberty R. NPA0038NPA0059NPA0071NPA0085NPA0101NPA0116NPA0130NPA0155NPA0164 NPA0038NPA0059NPA0071NPA0085NPA0101NPA0116NPA0130NPA0155NPA0164

Total Suspended Solids Biological Oxygen Demand

12 4

9 3 6 2 mg/liter mg/liter 3 1 0 0 Bridge Bridge nr OM Liberty Liberty Liberty Liberty Beaver nr OM Liberty Liberty Liberty Liberty Beaver nr Cove nr Cove Liberty R. Liberty R. Liberty R. Liberty R. Liberty R. Liberty R. Liberty R. Liberty R. Reservoir Reservoir Reservoir Reservoir Reservoir Reservoir Reservoir Reservoir Liberty R. Liberty R. H20 Intake H20 Intake NPA0038NPA0059NPA0071NPA0085NPA0101NPA0116NPA0130NPA0155NPA0164 NPA0038NPA0059NPA0071NPA0085NPA0101NPA0116NPA0130NPA0155NPA0164

2

0

Liberty R. H20 Intake Liberty R. Bridge LibertyR. nr Cove Liberty R. nr OM Point Liberty Reservoir 1 Liberty Reservoir 2 LibertyReservoir nr Crossing Liberty Reservoir 3 LibertyR. Beaver Run 07/25/2000 08/08/2000 08/08/2000

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 88 Document version: August 22, 2007 Liberty Reservoir (main) Low Flow Conditions (June to November) Stations are presented from left to right from downstream to upstream

Dissolved Inorganic Nitrogen Dissolved Inorganic Phosphorus

2.2 0.004 1.65 0.003 1.1 0.002

mg/liter 0.55 mg/liter 0.001 0 0 Bridge Bridge nr OM Liberty Liberty Liberty Liberty Beaver nr OM Liberty Liberty Liberty Liberty Beaver nr Cove nr Cove Liberty R. Liberty R. Liberty R. Liberty R. Liberty R. Liberty R. Liberty R. Liberty R. Reservoir Reservoir Reservoir Reservoir Reservoir Reservoir Reservoir Reservoir Liberty R. Liberty R. H20 Intake H20 Intake NPA0038NPA0059NPA0071NPA0085NPA0101NPA0116NPA0130NPA0155NPA0164 NPA0038NPA0059NPA0071NPA0085NPA0101NPA0116NPA0130NPA0155NPA0164

Total Nitrogen Total Phosphorus

3.2 1.2 2.4 0.9 1.6 0.6 mg/liter 0.8 mg/liter 0.3 0 0 Bridge Bridge nr OM Liberty Liberty Liberty Liberty Beaver nr OM Liberty Liberty Liberty Liberty Beaver nr Cove nr Cove Liberty R. Liberty R. Liberty R. Liberty R. Liberty R. Liberty R. Liberty R. Liberty R. Reservoir Reservoir Reservoir Reservoir Reservoir Reservoir Reservoir Reservoir Liberty R. Liberty R. H20 Intake H20 Intake NPA0038NPA0059NPA0071NPA0085NPA0101NPA0116NPA0130NPA0155NPA0164 NPA0038NPA0059NPA0071NPA0085NPA0101NPA0116NPA0130NPA0155NPA0164

2

0

Liberty R. H20 Intake Liberty R. Bridge LibertyR. nr Cove Liberty R. nr OM Point Liberty Reservoir 1 Liberty Reservoir 2 LibertyReservoir nr Crossing Liberty Reservoir 3 LibertyR. Beaver Run 07/25/2000 08/08/2000 08/08/2000

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 89 Document version: August 22, 2007 Liberty Reservoir (tributaries) High Flow Conditions (December-May) Stations are presented from left to right from downstream to upstream

Chlorophyll a Dissolved Oxygen

10 16 8 12 5 8 µg/liter 3 mg/liter 4 0 0 Run Run Run Little Run Run Run Middle Little Run Run Branch Beaver North Middle Morgan Morgan Branch Beaver North Morgan Morgan Branch Branch Patapsco Snowden Bond Run Snowden Patapsco Bond Run UOL0004LMR0015MOR0040MDE0026BEA0016NPA0167UZP0002 UOL0004 LMR0015 MOR0040MDE0026 BEA0016 NPA0167 UZP0002

Total Suspended Solids Biological Oxygen Demand

60 4.0

45 3.0

30 2.0 mg/liter mg/liter 15 1.0

0 0.0 Run Run Run Run Little Run Run Little Middle Run Run Middle Branch Beaver North Branch Beaver Morgan Morgan North Morgan Morgan Branch Branch Patapsco Snowden Patapsco Snowden Bond Run Bond Run UOL0004LMR0015MOR0040MDE0026BEA0016NPA0167 UZP0002 UOL0004 LMR0015 MOR0040 MDE0026 BEA0016 NPA0167 UZP0002

01/06/1900

01/04/1900

01/02/1900

01/00/1900 12/14/1999 01/11/2000 01/24/2000 02/23/2000 02/29/2000 03/14/2000 04/11/2000 05/09/2000 05/24/2000

SnowdenRun Little Morgan Run MorganRun MiddleBranch Beaver Run North Branch Patapsco Bond Run

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 90 Document version: August 22, 2007 Liberty Reservoir (tributaries) High Flow Conditions (December-May) Stations are presented from left to right from downstream to upstream

Dissolved Inorganic Nitrogen Dissolved Inorganic Phosphorus

6 0.032

5 0.024

3 0.016 mg/liter 2 mg/liter 0.008

0 0.000 Run Run Run Run Run Run Little Little Middle Middle Run Run Branch Beaver North Branch Beaver North Morgan Morgan Morgan Morgan Branch Branch Patapsco Patapsco Snowden Bond Run Snowden Bond Run UOL0004LMR0015MOR0040MDE0026BEA0016 NPA0167UZP0002 UOL0004LMR0015MOR0040MDE0026BEA0016NPA0167UZP0002

Total Nitrogen Total Phosphorus

6.0 1.2 4.5 0.9 3.0 0.6 mg/liter mg/liter 1.5 0.3 0.0 0.0 Run Run Run Little Run Run Run Middle Little Run Run Branch Beaver North Middle Morgan Morgan Branch Beaver North Morgan Morgan Branch Branch Patapsco Snowden Bond Run Snowden Patapsco Bond Run UOL0004LMR0015MOR0040MDE0026BEA0016NPA0167UZP0002 UOL0004LMR0015MOR0040MDE0026BEA0016NPA0167UZP0002

01/06/1900

01/04/1900

01/02/1900

01/00/1900 12/14/1999 01/11/2000 01/24/2000 02/23/2000 02/29/2000 03/14/2000 04/11/2000 05/09/2000 05/24/2000

SnowdenRun Little Morgan Run MorganRun MiddleBranch Beaver Run North Branch Patapsco Bond Run

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 91 Document version: August 22, 2007 Liberty Reservoir (tributaries) Low Flow Conditions (June to November) Stations are presented from left to right from downstream to upstream

Chlorophyll a Dissolved Oxygen

3.2 16 2.4 12 1.6 8 µg/liter

0.8 mg/liter 4 0.0 0 Run Run Run Run Run Run Little Little Middle Middle Run Run Branch Beaver North Branch Beaver North Morgan Morgan Morgan Morgan Branch Branch Patapsco Patapsco Snowden Bond Run Snowden Bond Run UOL0004 LMR0015MOR0040MDE0026BEA0016 NPA0167 UZP0002 UOL0004LMR0015MOR0040MDE0026BEA0016NPA0167UZP0002

Total Suspended Solids Biological Oxygen Demand

20 3.2 15 2.4 10 1.6 mg/liter 5 mg/liter 0.8 0 0.0 Run Run Run Run Run Run Little Little Middle Middle Run Run Branch Beaver North Branch Beaver North Morgan Morgan Morgan Morgan Branch Branch Patapsco Patapsco Snowden Bond Run Snowden Bond Run UOL0004 LMR0015MOR0040 MDE0026 BEA0016 NPA0167 UZP0002 UOL0004LMR0015MOR0040MDE0026BEA0016NPA0167UZP0002

01/03/1900

01/02/1900

01/01/1900

01/00/1900 06/20/2000 07/25/2000 08/08/2000 09/06/2000 10/13/1999 10/26/1999 11/16/1999 11/30/1999 SnowdenRun Little Morgan Run MorganRun MiddleBranch Beaver Run North Branch Patapsco Bond Run

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 92 Document version: August 22, 2007 Liberty Reservoir (tributaries) Low Flow Conditions (June to November) Stations are presented from left to right from downstream to upstream

Dissolved Inorganic Nitrogen Dissolved Inorganic Phorsphorus

6 0.012 5 0.009 3 0.006

mg/liter 2 mg/liter 0.003 0 0.000 Run Run Run Run Run Run Little Little Run Run Middle Middle Branch Beaver Branch Beaver North North Morgan Morgan Morgan Morgan Branch Branch Snowden Patapsco Snowden Patapsco Bond Run Bond Run UOL0004 LMR0015MOR0040MDE0026 BEA0016 NPA0167 UZP0002 UOL0004LMR0015MOR0040MDE0026BEA0016NPA0167UZP0002

Total Nitrogen Total Phosphorus

6 1.2 5 0.9 3 0.6 mg/liter

2 mg/liter 0.3 0 0.0 Run Run Run Run Run Run Little Little Middle Middle Run Run Branch Beaver North Branch Beaver North Morgan Morgan Morgan Morgan Branch Branch Patapsco Patapsco Snowden Bond Run Snowden Bond Run UOL0004 LMR0015 MOR0040 MDE0026 BEA0016 NPA0167 UZP0002 UOL0004 LMR0015MOR0040MDE0026 BEA0016NPA0167 UZP0002

01/03/1900

01/02/1900

01/01/1900

01/00/1900 06/20/2000 07/25/2000 08/08/2000 09/06/2000 10/13/1999 10/26/1999 11/16/1999 11/30/1999 SnowdenRun Little Morgan Run MorganRun MiddleBranch Beaver Run North Branch Patapsco Bond Run

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 93 Document version: August 22, 2007 LIBERTY RESERVOIR STATION LIST

Station Station Code Lat/Long Description Name LIBERTY RESERVIOR NPA0038 Liberty R. H20 39 22.821 Center reservoir near drinking water intake Intake 76 53.535 114 ft. NPA0059 Liberty R. Bridge 39 23.808 Center reservoir route 26 bridge crossing 76 53.129 85 ft. NPA0071 Liberty R. nr Cove 39 24.522 Center reservoir just northwest of Locust 76 53.005 Run Cove 90 ft. NPA0085 Liberty R. nr OM 39 25.208 Center reservoir Northeast of Oakland Mill Point 76 52.679 Point 85 ft. NPA0101 Liberty Reservoir 1 39 25.714 Center reservoir after bend 76 53.814 70 ft. NPA0116 Liberty Reservoir 2 39 26.448 Center reservoir after second sharp bend 76 53.256 just starting to turn back north. 56 ft. NPA0130 Liberty Reservoir 39 26.930 Center reservoir Deer Park Road crossing nr Crossing 76 52.666 48 ft. NPA0155 Liberty Reservoir 3 39 27.687 Center reservoir on sharp bend 76 53.498 24 ft. NPA0164 Liberty R. Beaver 39 28.170 Center reservoir confluence of Beaver Run Run 76 53.227 and North Branch Patapsco. SNOWDEN RUN UOL0004 Snowden Run 39 24.506 Snowdens Run Road crossing. Good parking 76 54.814 near some type of pumping station looking building. LITTLE MORGAN RUN LMR0015 Little Morgan Run 39 25.524 Bartholow Road Crossing. Staff gage. Take 76 57.638 flow and read staff. ADC Carroll County MAP 30 B-5 MORGAN RUN MOR0040 Morgan Run 39 27.142 London Bridge Road crossing. USGS Gage. USGS 76 57.310 ADC Carroll County MAP 30 C-1 MIDDLE BRANCH MDE0026 Middle Branch 39 27.754 Louisville Road crossing. Good parking and 76 54.454 access. Flow site. ADC Carroll County MAP 30 J-1 BEAVER RUN BEA0016 Beaver Run USGS 39 29.359 Hughes Road crossing. USGS Gage. 76 54.212 ADC Carroll County MAP 26 A-7

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 94 Document version: August 22, 2007

NORTH BRANCH PATAPSCO NPA0165 No. Br. Patapsco 39 30.032 Take Industrial Park Drive (off Rte 91) – 76 53.000 sample off foot bridge in Congoleum plant. Check in at office. BOND RUN UZP0002 Bond Run USGS 39 29.783 Hollingsworth Road Crossing. Old USGS 76 52.203 gage house. Good access and flow site.

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 95 Document version: August 22, 2007 South Branch Patapsco River

South Branch Patapsco Monitoring Stations

Map Prepared by the Maryland Department of the Environment Science Services Administration Montgomery Park Business Center 1800 Washington Boulevard, Suite 540 Baltimore, Maryland 21230-1718

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 96 Document version: August 22, 2007 South Branch Patapsco River High Flow Conditions (December-May) Stations are presented from left to right from downstream to upstream

Chlorophyll a Dissolved Oxygen

20 20 15 15 10 10 µg/liter 5 mg/liter 5 0 0 Rd Rd Area Area Rd 2 Rd 1 Rd 2 Rd 1 Rd 1 Rd 2 Rd 1 Rd 2 Route 32 Route 32 Near Dam Near Dam Restricted Restricted Watersville Watersville White Rock White Rock White Rock White Rock Large Cove Large Cove Marriottsville Marriottsville Marriottsville Marriottsville VAA0002PIR0083PIR0078PIR0070PIR0064PIR0056PIR0002SBP0013SBP0149 VAA0002PIR0083PIR0078PIR0070PIR0064PIR0056PIR0002SBP0013SBP0149

Total Suspended Solids Biological Oxygen Demand

240 4 180 3 120 2 mg/liter mg/liter 60 1 0 0 Rd Area Rd Rd 2 Rd 1 Area Rd 1 Rd 2 Rd 2 Rd 1 Route 32 Rd 1 Rd 2 Route 32 Near Dam Restricted Restricted Near Dam Watersville White Rock White Rock Watersville Large Cove White Rock White Rock Large Cove Marriottsville Marriottsville Marriottsville Marriottsville VAA0002PIR0083PIR0078PIR0070PIR0064PIR0056PIR0002SBP0013SBP0149 VAA0002PIR0083PIR0078PIR0070PIR0064PIR0056PIR0002SBP0013SBP0149

8 6

4 2 0 12/14/1999 01/11/2000 01/24/2000 02/23/2000 02/29/2000 03/13/2000 04/10/2000 05/08/2000 05/24/2000 White Rock Rd 2 White Rock Rd 1 Restricted Area Large Cove Near Dam Route 32 Marriottsville Rd 1 Marriottsville Rd 2 Watersville Rd

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 97 Document version: August 22, 2007 South Branch Patapsco River High Flow Conditions (December-May) Stations are presented from left to right from downstream to upstream

Dissolved Inorganic Nitrogen Dissolved Inorganic Phosphorus

8 0.16 6 0.12 4 0.08 mg/liter mg/liter 2 0.04 0 0 Rd Rd Area Area Rd 2 Rd 1 Rd 2 Rd 1 Rd 1 Rd 2 Rd 1 Rd 2 Route 32 Route 32 Near Dam Restricted Restricted Near Dam Watersville Watersville White Rock White Rock White Rock White Rock Large Cove Large Cove Marriottsville Marriottsville Marriottsville Marriottsville VAA0002PIR0083PIR0078PIR0070PIR0064PIR0056PIR0002SBP0013SBP0149 VAA0002PIR0083PIR0078PIR0070PIR0064PIR0056PIR0002SBP0013SBP0149

Total Nitrogen Total Phosphorus

8 1.2 6 0.9 4 0.6 mg/liter mg/liter 2 0.3 0 0 Rd Area Rd Rd 2 Rd 1 Area Rd 1 Rd 2 Rd 2 Rd 1 Route 32 Rd 1 Rd 2 Route 32 Near Dam Restricted Restricted Near Dam Watersville White Rock White Rock Watersville Large Cove White Rock White Rock Large Cove Marriottsville Marriottsville Marriottsville Marriottsville VAA0002PIR0083PIR0078PIR0070PIR0064PIR0056PIR0002SBP0013SBP0149 VAA0002PIR0083PIR0078PIR0070PIR0064PIR0056PIR0002SBP0013SBP0149

8 6

4 2 0 12/14/1999 01/11/2000 01/24/2000 02/23/2000 02/29/2000 03/13/2000 04/10/2000 05/08/2000 05/24/2000 White Rock Rd 2 White Rock Rd 1 Restricted Area Large Cove Near Dam Route 32 Marriottsville Rd 1 Marriottsville Rd 2 Watersville Rd

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 98 Document version: August 22, 2007 Patapsco River Lower North Branch Low Flow Conditions (June to November) Stations are presented from left to right from downstream to upstream

Chlorophyll a Dissolved Oxygen

20 16 15 12 10 8

µg/liter 5

mg/liter 4 0 0 Rd Rd Area Area Rd 2 Rd 1 Rd 2 Rd 1 Rd 1 Rd 2 Rd 1 Rd 2 Route 32 Route 32 Restricted Restricted Near Dam Near Dam Watersville Watersville White Rock White Rock Large Cove White Rock White Rock Large Cove Marriottsville Marriottsville Marriottsville Marriottsville VAA0002PIR0083PIR0078PIR0070PIR0064PIR0056PIR0002SBP0013SBP0149 VAA0002PIR0083PIR0078PIR0070PIR0064PIR0056PIR0002SBP0013SBP0149

Total Suspended Solids Biological Oxygen Demand

80 4.8 60 3.6 40 2.4

mg/liter 1.2

mg/liter 20 0 0 Rd Rd Area Area Rd 2 Rd 1 Rd 2 Rd 1 Rd 1 Rd 2 Rd 1 Rd 2 Route 32 Route 32 Near Dam Near Dam Restricted Restricted Watersville Watersville White Rock White Rock White Rock White Rock Large Cove Large Cove Marriottsville Marriottsville Marriottsville Marriottsville VAA0002PIR0083PIR0078PIR0070PIR0064PIR0056PIR0002SBP0013SBP0149 VAA0002PIR0083PIR0078PIR0070PIR0064PIR0056PIR0002SBP0013SBP0149

01/12/1900 01/10/1900 01/08/1900 01/06/1900 01/04/1900 01/02/1900

01/00/1900 06/20/2000 08/09/2000 09/07/2000 10/13/1999 10/26/1999 11/16/1999 11/30/1999 Stoney Run Deep Run Herbert Run Dogwood Run Brices Run North Branch P.

SXR0002 DXC0004 EBH0005 DGW0002 BCN0003 NPA0026

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 99 Document version: August 22, 2007 Patapsco River Lower North Branch Low Flow Conditions (June to November) Stations are presented from left to right from downstream to upstream

Dissolved Inorganic Nitrogen Dissolved Inorganic Phosphorus

6 0.16 4.5 0.12 3 0.08 1.5 0.04 mg/liter 0 mg/liter 0 Rd Rd Area Area Rd 2 Rd 1 Rd 2 Rd 1 Rd 1 Rd 2 Rd 1 Rd 2 Route 32 Route 32 Near Dam Near Dam Restricted Restricted Watersville Watersville White Rock White Rock White Rock White Rock Large Cove Large Cove Marriottsville Marriottsville Marriottsville Marriottsville VAA0002PIR0083PIR0078PIR0070PIR0064PIR0056PIR0002SBP0013SBP0149 VAA0002PIR0083PIR0078PIR0070PIR0064PIR0056PIR0002SBP0013SBP0149

Total Nitrogen Total Phosphorus

8 1.2 6 0.9 4 0.6 2 mg/liter 0 mg/liter 0.3 0 Rd Area Rd Rd 2 Rd 1 Area Rd 1 Rd 2 Rd 2 Rd 1 Route 32 Rd 1 Rd 2 Route 32 Restricted Near Dam Near Dam Restricted Watersville White Rock White Rock Large Cove Watersville White Rock White Rock Large Cove Marriottsville Marriottsville Marriottsville Marriottsville VAA0002PIR0083PIR0078PIR0070PIR0064PIR0056PIR0002SBP0013SBP0149 VAA0002PIR0083PIR0078PIR0070PIR0064PIR0056PIR0002SBP0013SBP0149

01/12/1900 01/10/1900 01/08/1900 01/06/1900 01/04/1900 01/02/1900

01/00/1900 06/20/2000 08/09/2000 09/07/2000 10/13/1999 10/26/1999 11/16/1999 11/30/1999 Stoney Run Deep Run Herbert Run Dogwood Run Brices Run North Branch P.

SXR0002 DXC0004 EBH0005 DGW0002 BCN0003 NPA0026

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 100 Document version: August 22, 2007 SOUTH BRANCH PATAPSCO STATION LIST

Station Station Lat/Long Description Code Names PINEY RUN RESERVIOR PIR0078 Restricted 39 24.383 At line of restricted area. Area maybe floats across Area 76 59.416 this area. Use GPS and take descriptions. PIR0070 Large Cove 39 23.850 Mid-reservoir. Down reservoir from boat ramps on 76 59.000 right and large cove on left when facing down reservoir. PIR0064 Near Dam 39 23.300 Mid-reservoir near dam across from cove on left when 76 58.600 facing the dam. PINEY RUN RESERVIOR INPUTS PIR0002 Marriottsville 39 21.186 Marriottsville Road Crossing, flow site upstream. Rd. 1 76 53.818 ADC Carroll County MAP 36 A-6 PIR0056 Route 32 39 22.925 Route 32 Road crossing, flow site. 76 58.015 ADC Carroll County MAP 30 A-13 PIR0083 White Rock 39 24.287 White Rock Road crossing, flow site upstream. Rd. 1 76 59.849 ADC Carroll County MAP 29 G-9 VAA0002 White Rock 39 24.568 White Rock Road crossing, flow site. Rd. 2 76 59.610 ADC Carroll County MAP 29 G-8 SOUTH BRANCH PATAPSCO SBP0013 Marriottsville 39 21.084 Marriottsville Road Crossing, flow site if possible. Rd. 2 76 53.902 ADC Carroll County MAP A-6 SBP0149 Watersville 39 22.078 Watersville Road crossing, flow site upstream. Rd. 77 06.242 ADC Carroll County MAP 33 A-3

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 101 Document version: August 22, 2007

West Chesapeake Bay Watershed

Magothy River

Severn River

South River

West River

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 102 Document version: August 22, 2007 WEST CHESAPEAKE AREA (Sub-basin 02-13-10)

General Description (from 1998, 305 (b) Report) The West Chesapeake sub-basin drains 267 square miles of Anne Arundel County and portions of Calvert County on the Western Shore of the Chesapeake Bay. The entire sub-basin lies in the Coastal Plain Province. In many areas near tidal waters, the hill-terrain forms cliffs alo ng the shoreline. Large water bodies include Lake Waterford and the Magothy, Severn, South, West, and Rhode Rivers.

Most land in the West Chesapeake sub-basin is forested (49 percent), however, 34 percent of the drainage land area is developed. Less than 16 percent of the drainage is agricultural land. The only city in the sub-basin is Annapolis but other communities include Pasadena, Severna Park, Edgewater, Highland Beach, and Chesapeake Beach.

Surface waters are classified as Use I (water contact recreation and aquatic life), Use II (shellfish harvesting) or, in some free-flowing areas of Severn River, Use III (natural trout) or Use IV (put-and- take trout) (COMAR '26.08.02.08K). For the most recent information regarding specific use classes in this watershed, the reader is referred to the Code of Maryland Regulations.

The Severn River was identified as one of the State's Scenic Rivers; this designation is designed to preserve and protect the rivers natural values. One stream (Jabez Branch) supports a natural brook trout population for a total of 0.5 miles of stream length.

The State routinely monitors water quality at five Bay Tributary stations. One fixed Long Term Benthic Macroinvertebrate program station is monitored for estuarine benthos in addition to randomly selected Long Term Benthic Macroinvertebrate program sites. The Maryland Biological Stream Survey (MBSS) collected water quality samples at 45 stations in 1994 and at 32 stations in 1997. In addition, water quality data are available from MDE's shellfish sanitation program for most tidal areas.

Water Quality Summary The Magothy (02131001), Severn (02131002), South (02131003), and West Rivers (02131004), will be addressed by a cooperative effort by the Bay States with the EPA Chesapeake Bay Program taking the lead.

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 103 Document version: August 22, 2007 Magothy River Magothy River Monitoring Stations

Map Prepared by the Maryland Department of the Environment Science Services Administration Montgomery Park Business Center 1800 Washington Boulevard, Suite 540 Baltimore, Maryland 21230-1718

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 104 Document version: August 22, 2007 Magothy River High Flow Conditions (December-May) Stations are presented from left to right from downstream to upstream

Chlorophyll a Dissolved Oxygen

100 16 75 12 50 8

µg/liter 25

mg/liter 4 0 0 Ave Ave East of East of Ferry Pt Ferry Pt Flashing Flashing Creeks Bridge Crossing Creeks Bridge Crossing Catherine Catherine Sillery Bay Sillery Bay Confluence Confluence River Mouth Magothy Rd River Mouth Magothy Rd XHF3634 XHF4119 XHF5229 XHE4598 XHE5185 XHE6675MAG0080 XHF3634 XHF4119 XHF5229 XHE4598 XHE5185 XHE6675MAG0080

Total Suspended Solids Biological Oxygen Demand

80 12 60 9 6 40

mg/liter 3 mg/liter 20 0 0 River Ave Mouth East of Ave Ferry Pt Flashing East of Ferry Pt Creeks Bridge Crossing Flashing Catherine Creeks Magothy Crossing Sillery Bay Catherine Rd Bridge Confluence Sillery Bay River Mouth Magothy Rd Confluence XHF3634 XHF4119 XHF5229 XHE4598XHE5185 XHE6675MAG0080 XHF3634 XHF4119 XHF5229 XHE4598 XHE5185 XHE6675MAG0080

0.01 0.01 0 0 0 12/13/1999RiverMouth 01/12/2000East of Flashing 02/22/2000Sillery Bay 02/28/2000FerryPt 03/28/2000CreeksConfluence 05/17/2000Magothy Rd Bridge 05/23/2000Catherine Ave Crossing

XHF3634 XHF4119 XHF5229 XHE4598 XHE5185 XHE6675 MAG0080

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 105 Document version: August 22, 2007 Magothy River High Flow Conditions (December-May) Stations are presented from left to right from downstream to upstream

Dissolved Inorganic Nitrogen Dissolved Inorganic Phosphorus

2 0.008 1.5 0.006 1 0.004 mg/lter

mg/liter 0.5 0.002 0 0 Ave Ave East of East of Ferry Pt Ferry Pt Flashing Flashing Creeks Bridge Crossing Creeks Bridge Crossing Catherine Catherine Sillery Bay Sillery Bay Confluence Confluence River Mouth Magothy Rd River Mouth Magothy Rd XHF3634 XHF4119 XHF5229 XHE4598 XHE5185 XHE6675MAG0080 XHF3634XHF4119XHF5229XHE4598XHE5185XHE6675MAG0080

Total Nitrogen Total Phosphorus

3.2 0.12 2.4 0.09 1.6 0.06

mg/liter 0.8 mg/liter 0.03 0 0 Ave Ave East of East of Ferry Pt Ferry Pt Flashing Flashing Creeks Bridge Crossing Creeks Bridge Crossing Catherine Catherine Sillery Bay Sillery Bay Confluence Confluence River Mouth Magothy Rd River Mouth Magothy Rd XHF3634XHF4119XHF5229XHE4598XHE5185XHE6675MAG0080 XHF3634XHF4119XHF5229XHE4598XHE5185XHE6675MAG0080

0.01 0.01 0 0 0 12/13/1999RiverMouth 01/12/2000East of Flashing 02/22/2000Sillery Bay 02/28/2000FerryPt 03/28/2000CreeksConfluence 05/17/2000Magothy Rd Bridge 05/23/2000Catherine Ave Crossing

XHF3634 XHF4119 XHF5229 XHE4598 XHE5185 XHE6675 MAG0080

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 106 Document version: August 22, 2007 Magothy River Low Flow Conditions (June to November) Stations are presented from left to right from downstream to upstream

Chlorophyll a Dissolved Oxygen

80 12 60 9 40 6 µg/liter 20 mg/liter 3 0 0 River River Mouth Mouth Ave Ave East of East of Ferry Pt Ferry Pt Flashing Flashing Creeks Creeks Magothy Crossing Magothy Crossing Catherine Catherine Rd Bridge Rd Bridge Sillery Bay Sillery Bay Confluence Confluence XHF3634XHF4119XHF5229XHE4598XHE5185XHE6675MAG0080 XHF3634XHF4119XHF5229XHE4598XHE5185XHE6675MAG0080

Total Suspended Solids Biological Oxygen Demand

40 20 30 15 20 10 mg/liter 10 mg/liter 5 0 0 River Mouth Ave Ave East of Ferry Pt East of Flashing Ferry Pt Flashing Creeks Bridge Crossing Catherine Creeks Magothy Crossing Catherine Rd Bridge Sillery Bay Sillery Bay Confluence Confluence River Mouth Magothy Rd XHF3634 XHF4119 XHF5229 XHE4598 XHE5185 XHE6675MAG0080 XHF3634XHF4119XHF5229XHE4598XHE5185XHE6675MAG0080

0.15 0.1 0.05 06/05/2000 07/19/2000 08/16/2000 09/20/2000 10/12/1999 10/25/1999 0

Rt. 450 Rt. 50 East of Flashing G "5" RoundBay Cedar Point IndianLanding Rd DicusRoad 11/15/1999XGF9708 XHE049711/29/1999 XHE1982 XHE2362 XHE3659 XHE4737 SER0011

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 107 Document version: August 22, 2007 Magothy River Low Flow Conditions (June to November) Stations are presented from left to right from downstream to upstream

Dissolved Inorganic Nitrogen Dissolved Inorganic Phosphorus

2 0.016 1.5 0.012 1 0.008

mg/liter 0.5 mg/liter 0.004 0 0 Ave River Mouth East of Ferry Pt Ave Flashing East of Ferry Pt Creeks Bridge Crossing Catherine Flashing Creeks Magothy Crossing Sillery Bay Catherine Rd Bridge Confluence Sillery Bay River Mouth Magothy Rd Confluence XHF3634 XHF4119 XHF5229 XHE4598 XHE5185 XHE6675MAG0080 XHF3634XHF4119XHF5229XHE4598XHE5185XHE6675MAG0080

Total Nitrogen Total Phosphorus

3.2 0.12 2.4 0.09 1.6 0.06 mg/liter 0.8 mg/liter 0.03 0 0 Ave Ave East of East of Ferry Pt Ferry Pt Flashing Flashing Creeks Bridge Crossing Creeks Bridge Crossing Catherine Catherine Sillery Bay Sillery Bay Confluence Confluence River Mouth Magothy Rd River Mouth Magothy Rd XHF3634 XHF4119 XHF5229 XHE4598 XHE5185 XHE6675MAG0080 XHF3634 XHF4119 XHF5229 XHE4598XHE5185 XHE6675MAG0080

0.15 0.1 0.05 06/05/2000 07/19/2000 08/16/2000 09/20/2000 10/12/1999 10/25/1999 0

Rt. 450 Rt. 50 East of Flashing G "5" RoundBay Cedar Point IndianLanding Rd DicusRoad 11/15/1999XGF9708 XHE049711/29/1999 XHE1982 XHE2362 XHE3659 XHE4737 SER0011

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 108 Document version: August 22, 2007 MAGOTHY RIVER STATION LIST

Station Station Lat/Long Description Code Name MAGOTHY RIVER XHF3634 39 03.586 Mid-channel, inside mouth. 15 ft. River 76 26.611 Mouth XHF4119 39 04.094 East of flashing G”9”. 13 ft. East of 76 28.129 Flashing XHE4598 39 04.501 Mid-channel between R”12” and G”11” between Ferry Pt. 76 30.189 North Ferry Pt and South Ferry Pt. XHE5185 39 05.147 Confluence of Cattail Creek and Corkey Creek near Creeks 76 31.450 DM “MR”. 15 ft. Confluen ce XHE6675 Magothy 39 06.606 Bridge crossing on Magothy Road. Road 76 32.506 Bridge

MAG0080 39 06.942 Catherine Avenue crossing. Catherine 76 32.990 Ave. Crossing SILLERY BAY XHF5229 39 05.202 Southeast of Hickory Pt. 12 Ft. 76 27.061

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 109 Document version: August 22, 2007 Severn River Severn River Monitoring Stations

Map Prepared by the Maryland Department of the Environment Technical and Regulatory Services Administration Montgomery Park Business Center 1800 Washington Boulevard, Suite 540 Baltimore, Maryland 21230-1718 2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 110 Document version: August 22, 2007 Severn River High Flow Conditions (December-May) Stations are presented from left to right from downstream to upstream

Chlorophyll a Dissolved Oxygen

800 16 600 12 400 8 µg/liter 200 mg/liter 4 0 0 Bay Rd Point Road Dicus Rt. 50 Cedar Bay Pt Rd Road Round Point Dicus "5" Rt. 50 Indian Cedar Rt. 450 Pt Round G "5" Indian Landing Rt. 450 East of East of Landing Flashing Flashing G Greenbury Greenbury XGF7729XGF9708XHE0497XHE1982XHE2362XHE3659XHE4737SER0011 XGF7729XGF9708XHE0497XHE1982XHE2362XHE3659XHE4737SER0011

Total Suspended Solids Biological Oxygen Demand

200 32

150 24

100 16 mg/liter 50 mg/liter 8

0 0 Bay Rd Bay Rd Point Road Point Road Dicus Dicus Rt. 50 Rt. 50 Cedar Cedar Pt Pt Round Round "5" "5" Indian Indian Rt. 450 Rt. 450 Landing Landing East of East of Flashing G Flashing G Greenbury Greenbury XGF7729XGF9708XHE0497XHE1982XHE2362XHE3659XHE4737SER0011 XGF7729XGF9708XHE0497XHE1982XHE2362XHE3659XHE4737SER0011

0.8 0.6 0.4 0.2 0 12/13/1999Rt. 450 01/12/2000Rt. 50 02/22/2000East of Flashing G "5" 02/28/2000RoundBay 03/28/2000Cedar Point Indian05/17/2000Landing Rd Dicus05/23/2000Road XGF9708 XHE0497 XHE1982 XHE2362 XHE3659 XHE4737 SER0011

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 111 Document version: August 22, 2007 Severn River High Flow Conditions (December-May) Stations are presented from left to right from downstream to upstream

Dissolved Inorganic Nitrogen Dissolved Inorganic Phosphorus

1.6 0.08 1.2 0.06 0.8 0.04 mg/liter 0.4 mg/liter 0.02 0 0 Bay Rd Bay Rd Point Road Point Road Dicus Dicus Rt. 50 Rt. 50 Cedar Cedar Pt Pt Round Round "5" "5" Indian Indian Rt. 450 Rt. 450 Landing Landing East of East of Flashing G Flashing G Greenbury Greenbury XGF7729XGF9708XHE0497XHE1982XHE2362XHE3659XHE4737SER0011 XGF7729XGF9708XHE0497XHE1982XHE2362XHE3659XHE4737SER0011

Total Phosphorus Total Nitrogen 0.8 12 0.6 9 6 0.4 mg/lter

mg/liter 3 0.2

0 0 Bay Rd Point Road Dicus Rt. 50 Cedar Bay Pt Rd Road Round Point Dicus "5" Rt. 50 Indian Cedar Rt. 450 Pt Round G "5" Indian Landing Rt. 450 East of East of Landing Flashing Flashing G Greenbury Greenbury XGF7729XGF9708XHE0497XHE1982XHE2362XHE3659XHE4737SER0011 XGF7729XGF9708XHE0497XHE1982XHE2362XHE3659XHE4737SER0011

0.8 0.6 0.4 0.2 0 12/13/1999Rt. 450 01/12/2000Rt. 50 02/22/2000East of Flashing G "5" 02/28/2000RoundBay 03/28/2000Cedar Point 05/17/2000IndianLanding Rd 05/23/2000DicusRoad XGF9708 XHE0497 XHE1982 XHE2362 XHE3659 XHE4737 SER0011

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 112 Document version: August 22, 2007 Severn River Low Flow Conditions (June to November) Stations are presented from left to right from downstream to upstream

Chlorophyll a Dissolved Oxygen

60 12 45 9 30 6 µg/liter

15 mg/liter 3 0 0 Bay Rd Point Road Dicus Rt. 50 Bay Cedar Rd Road Pt Point Dicus Round Rt. 50 "5" Cedar Indian Pt Rt. 450 Round G "5" Indian Rt. 450 Landing East of Landing East of Flashing Flashing G Greenbury Greenbury XGF7729XGF9708XHE0497XHE1982XHE2362XHE3659XHE4737SER0011 XGF7729XGF9708XHE0497XHE1982XHE2362XHE3659XHE4737SER0011

Total Suspended Solids Biological Oxygen Demand

40 12 30 9 20 6 mg/liter 10 mg/liter 3 0 0 Bay Rd Point Road Dicus Rt. 50 Bay Cedar Rd Road Pt Point Dicus Round Rt. 50 "5" Cedar Indian Pt Rt. 450 Round G "5" Indian Rt. 450 Landing East of Landing East of Flashing Flashing G Greenbury Greenbury XGF7729XGF9708XHE0497XHE1982XHE2362XHE3659XHE4737SER0011 XGF7729XGF9708XHE0497XHE1982XHE2362XHE3659XHE4737SER0011

0.15 0.1 0.05 06/05/2000 07/19/2000 08/16/2000 09/20/2000 10/12/1999 10/25/1999 0

Rt. 450 Rt. 50 East of Flashing G "5" RoundBay Cedar Point IndianLanding Rd DicusRoad 11/15/1999XGF9708 XHE049711/29/1999 XHE1982 XHE2362 XHE3659 XHE4737 SER0011

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 113 Document version: August 22, 2007 Severn River Low Flow Conditions (June to November) Stations are presented from left to right from downstream to upstream

Dissolved Inorganic Phosphorus Dissolved Inorganic Nitrogen

0.048 1.6 1.2 0.036 0.8 0.024

mg/liter 0.012

mg/liter 0.4 0 0 Bay Rd Bay Rd Point Road Point Road Dicus Dicus Rt. 50 Rt. 50 Cedar Cedar Pt Pt Round Round "5" "5" Indian Indian Rt. 450 Rt. 450 Landing Landing East of East of Flashing G Flashing G Greenbury Greenbury XGF7729XGF9708XHE0497XHE1982XHE2362XHE3659XHE4737SER0011 XGF7729XGF9708XHE0497XHE1982XHE2362XHE3659XHE4737SER0011

Total Nitrogen Total Phosphorus

2 0.16 1.5 0.12 1 0.08 mg/liter

0.5 mg/liter 0.04 0 0 Bay Rd Bay Rd Point Road Point Road Dicus Dicus Rt. 50 Rt. 50 Cedar Cedar Pt Pt Round Round "5" "5" Indian Indian Rt. 450 Rt. 450 Landing Landing East of East of Flashing G Flashing G Greenbury Greenbury XGF7729XGF9708XHE0497XHE1982XHE2362XHE3659XHE4737SER0011 XGF7729XGF9708XHE0497XHE1982XHE2362XHE3659XHE4737SER0011

0.15 0.1 0.05 06/05/2000 07/19/2000 08/16/2000 09/20/2000 10/12/1999 10/25/1999 0

Rt. 450 Rt. 50 East of Flashing G "5" RoundBay Cedar Point IndianLanding Rd DicusRoad 11/15/1999XGF9708 XHE049711/29/1999 XHE1982 XHE2362 XHE3659 XHE4737 SER0011

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 114 Document version: August 22, 2007 SEVERN RIVER STATION LIST

Station Station Lat/Long Description Code Names SEVERN RIVER XGF7729 Greenbury Pt. 38 57.684 1500 yds south of Greenbury Pt. Depth ~ 20 ft. 76 27.077 XGF9708 Rte 450 38 59.653 Near old Rte 450 bridge. 76 29.185 XHE0497 Rt. 50 39 00.417 Just northwest of Rt. 50 bridge off A-frame house. 35 76 30.265 Ft. XHE1982 East of 39 01.854 East of flashing G “5”. 35 FT. flashing G 76 31.835 “5”. XHE3659 Cedar point 39 03.649 Southwest of Cedar point and southwest of flashing R 76 34.050 “12”. 20 FT. XHE4737 Indian 39 04.667 Arlington Echo Education Center. At end of Indian Landing Rd 76 36.309 Landing Rd, veer right. Park in lot and walk down road and hill to get dock sample. Long walk. SER0011 Dicus Road 39 05.109 Dicus Road crossing. Take flow upstream. 76 37.993 ROUND BAY XHE2362 39 02.292 Southeast end of St. Helena island and east of R “2”. 76 33.778 20 FT.

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 115 Document version: August 22, 2007 South River South River Monitoring Stations

Map Prepared by the Maryland Department of the Environment Science Services Administration Montgomery Park Business Center 1800 Washington Boulevard, Suite 540 Baltimore, Maryland 21230-1718

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 116 Document version: August 22, 2007 South River High Flow Conditions (December-May) Stations are presented from left to right from downstream to upstream

Chlorophyll a Dissolved Oxygen

100 16 75 12 50 8 µg/liter 25 mg/liter 4 0 0 R Mid- North Mid- North Ridge Point Ridge Point Bacon Bacon Branch Branch Branch Branch Shadow Channel Channel Flashing Shadow Station Station Riva Road Flashing R Calibration Riva Road Calibration XGF4805 XGE5790 XGE6972 XGE7456 XGE7942 BRB0013 NTH0008 XGF4805 XGE5790 XGE6972 XGE7456 XGE7942 BRB0013 NTH0008

Total Suspended Solids Biological Oxygen Demand

60 20 45 15 30 10 mg/liter

mg/liter 15 5 0 0 Mid- North Ridge Mid- North Point Point Ridge Bacon Bacon Branch Branch Branch Branch Channel Shadow Shadow Station Channel Station Riva Road Flashing R Calibration Riva Road Flashing R Calibration XGF4805 XGE5790 XGE6972 XGE7456 XGE7942 BRB0013 NTH0008 XGF4805 XGE5790 XGE6972 XGE7456 XGE7942 BRB0013 NTH0008

0.2 0.15 0.1 12/13/1999 01/12/2000 02/22/2000 02/28/2000 03/27/2000 03/28/2000 0.05 0

Mid-Channel Flashing R Shadow Point RivaRoad Calibration Station Bacon Ridge Branch NorthBranch 05/16/2000XGF4805 XGE579005/17/2000 XGE6972 05/23/2000 XGE7456 XGE7942 BRB0013 NTH0008

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 117 Document version: August 22, 2007 South River High Flow Conditions (December-May) Stations are presented from left to right from downstream to upstream

Dissolved Inorganic Nitrogen Dissolved Inorganic Phosphorus

1.2 0.04 0.9 0.03 0.6 0.02 mg/liter

0.3 mg/liter 0.01 0 0 Mid- North Ridge Mid- Ridge North Point Point Bacon Bacon Branch Branch Branch Branch Channel Shadow Channel Shadow Station Station Riva Road Flashing R Calibration Riva Road Flashing R Calibration XGF4805 XGE5790XGE6972 XGE7456 XGE7942BRB0013 NTH0008 XGF4805XGE5790XGE6972XGE7456XGE7942BRB0013NTH0008

Total Nitrogen Total Phosphorus

2 0.2 1.5 0.15

1 0.1 mg/liter mg/liter 0.5 0.05

0 0 Mid- North Ridge North Point Mid- Ridge Bacon Point Bacon Branch Branch Branch Branch Channel Shadow Shadow Station Channel Station Riva Road Flashing R Calibration Riva Road Flashing R Calibration XGF4805 XGE5790 XGE6972 XGE7456 XGE7942 BRB0013 NTH0008 XGF4805XGE5790XGE6972XGE7456XGE7942BRB0013NTH0008

0.2 0.15 0.1 12/13/1999 01/12/2000 02/22/2000 02/28/2000 03/27/2000 03/28/2000 0.05 0

Mid-Channel Flashing R Shadow Point RivaRoad Calibration Station Bacon Ridge Branch NorthBranch 05/16/2000XGF4805 XGE579005/17/2000 XGE6972 05/23/2000 XGE7456 XGE7942 BRB0013 NTH0008

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 118 Document version: August 22, 2007 South River Low Flow Conditions (June to November) Stations are presented from left to right from downstream to upstream

Chlorophyll a Dissolved Oxygen

60 12 45 9 30 6 mg/liter µg/liter 15 3

0 0 Mid- North Ridge Mid- North Point Point Ridge Bacon Bacon Branch Branch Branch Branch Channel Shadow Shadow Station Channel Station Riva Road Flashing R Calibration Riva Road Flashing R Calibration XGF4805 XGE5790 XGE6972 XGE7456 XGE7942 BRB0013 NTH0008 XGF4805 XGE5790 XGE6972 XGE7456 XGE7942 BRB0013 NTH0008

Total Suspended Solids Biological Oxygen Demand

60 10 45 7.5 30 5

mg/liter 15 mg/liter 2.5

0 0 Mid- North Mid- North Point Ridge Point Ridge Bacon Bacon Branch Branch Branch Branch Shadow Shadow Channel Channel Station Station Riva Road Riva Road Flashing R Calibration Flashing R Calibration XGF4805 XGE5790 XGE6972 XGE7456 XGE7942 BRB0013 NTH0008 XGF4805 XGE5790 XGE6972 XGE7456 XGE7942 BRB0013 NTH0008

10 5 06/05/2000 07/18/2000 07/19/2000 08/15/2000 08/16/2000 09/19/2000 0

Mid-Channel Flashing R Shadow Point RivaRoad Calibration Station Bacon Ridge Branch NorthBranch 09/20/2000XGF4805 XGE579010/12/1999 XGE6972 10/25/1999 XGE7456 11/15/1999XGE7942 11/29/1999BRB0013 NTH0008

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 119 Document version: August 22, 2007 South River Low Flow Conditions (June to November) Stations are presented from left to right from downstream to upstream

Dissolved Inorganic Nitrogen Dissolved Inorganic Phosphorus

1.2 0.04 0.9 0.03 0.6 0.02 mg/liter

0.3 mg/liter 0.01 0 0 Mid- North Mid- North Ridge Point Ridge Point Bacon Bacon Branch Branch Branch Branch Channel Shadow Channel Shadow Station Station Riva Road Flashing R Calibration Riva Road Flashing R Calibration XGF4805 XGE5790 XGE6972 XGE7456 XGE7942 BRB0013 NTH0008 XGF4805 XGE5790 XGE6972 XGE7456 XGE7942 BRB0013 NTH0008

Total Nitrogen Total Phosphorus

1.2 0.16 0.9 0.12 0.6 0.08

mg/liter 0.3 mg/lter 0.04 0 0 Mid- Mid- North North Ridge Ridge Point Point Bacon Bacon Branch Branch Branch Branch Channel Channel Shadow Station Shadow Station Riva Road Riva Road Flashing R Calibration Flashing R Calibration XGF4805 XGE5790 XGE6972 XGE7456 XGE7942 BRB0013 NTH0008 XGF4805 XGE5790 XGE6972 XGE7456 XGE7942 BRB0013 NTH0008

10 5 06/05/2000 07/18/2000 07/19/2000 08/15/2000 08/16/2000 09/19/2000 0

Mid-Channel Flashing R Shadow Point RivaRoad Calibration Station Bacon Ridge Branch NorthBranch 09/20/2000XGF4805 XGE579010/12/1999 XGE6972 10/25/1999 XGE7456 11/15/1999XGE7942 11/29/1999BRB0013 NTH0008

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 120 Document version: August 22, 2007

SOUTH RIVER STATION LIST

Station Station Lat/Long Description Code Names SOUTH RIVER XGF4805 Mid- 38 54.783 Mid-channel between DM 5 & 6. Depth ~ 25 ft. PS-16, 17 channel 76 29.412 XGE5790 Flashing R 38 55.756 South of Flashing R “10”. 10 FT. PS-18 76 31.027 XGE6972 Shadow 38 56.931 South of Shadow Point near R “16”. 20 FT. PS-19 Point 76 32.781 XGE7456 Riva Rd 38 57.399 East of Riva Rd. bridge. 14 FT. PS-20 76 34.367 XGE7942 Calibration 38 57.904 This calibration land station is collected by boat for high/low PS-21 Station 76 35.794 surveys. Use coords 38 57.896, 76 35.788 for GPS. 7 ft. BACON RIDGE BRANCH BRB0013 Bacon 39 00.081 Chesterfield Road crossing. Parking near old sludge mixing SM-16 Ridge 76 36.898 pumping station. Can take flow downstream Branch NORTH BRANCH NTH0008 North 38 59.167 100 yds down from Rutland Road, going eastbound on Rt 450. SM-15 Branch 76 37.269 Pull off on right.

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 121 Document version: August 22, 2007 West River West River Monitoring Stations

Map Prepared by the Maryland Department of the Environment Science Services Adminis tration Montgomery Park Business Center 1800 Washington Boulevard, Suite 540 Baltimore, Maryland 21230-1718

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 122 Document version: August 22, 2007 West River High Flow Conditions (December-May) Stations are presented from left to right from downstream to upstream

Chloropyll a Dissolved Oxygen

160 16

120 12

80 8 µg/liter 40 mg/liter 4

0 0 XGE1694 XGE1281 XGE9974 XGE3383 XGE1694 XGE1281 XGE9974 XGE3383

Dutchman Point Flashing R Calibration Rhode River Dutchman Point Flashing R Calibration Rhode River Station Station

Total Suspended Solids Biological Oxygen Demand

60 16

45 12

30 8 mg/liter mg/liter 15 4

0 0 XGE1694 XGE1281 XGE9974 XGE3383 XGE1694 XGE1281 XGE9974 XGE3383

Dutchman Point Flashing R Calibration Rhode River Dutchman Point Flashing R Calibration Rhode River Station Station

0.015 0.01 0.005 0 12/13/1999XGE1694 01/12/2000 XGE128102/22/2000 02/28/2000XGE9974 03/27/2000 XGE3383 05/23/2000

Dutchman Point FlashingR Calibration Station RhodeRiver

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 123 Document version: August 22, 2007 West River High Flow Conditions (December-May) Stations are presented from left to right from downstream to upstream

Dissolved Inorganic Nitrogen Dissolved Inorganic Phosphorus

0.016 1.2

0.9 0.012

0.6 0.008 mg/liter mg/liter 0.3 0.004

0 0 XGE1694 XGE1281 XGE9974 XGE3383 XGE1694 XGE1281 XGE9974 XGE3383

Dutchman Flashing R Calibration Rhode River Dutchman Flashing R Calibration Rhode River Point Station Point Station

Total Phosphorus Total Nitrogen

0.16 2 0.12 1.5 1 0.08 mg/liter mg/liter 0.5 0.04 0 0 XGE1694 XGE1281 XGE9974 XGE3383 XGE1694 XGE1281 XGE9974 XGE3383

Dutchman Point Flashing R Calibration Rhode River Dutchman Point Flashing R Calibration Rhode River Station Station

0.015 0.01 0.005 0 12/13/1999 XGE1694 01/12/2000 02/22/2000XGE1281 02/28/2000 XGE997403/27/2000 05/16/2000 XGE3383 05/23/2000

Dutchman Point FlashingR Calibration Station RhodeRiver

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 124 Document version: August 22, 2007 West River Low Flow Conditions (June to November) Stations are presented from left to right from downstream to upstream

Chlorophyll a Dissolved Oxygen

80 12

60 9

40 6 µg/liter mg/liter 20 3

0 0 XGE1694 XGE1281 XGE9974 XGE3383 XGE1694 XGE1281 XGE9974 XGE3383

Dutchman Point Flashing R Calibration Rhode River Dutchman Point Flashing R Calibration Rhode River Station Station

Total Suspended Solids Biological Oxygen Demand

48 10

8 36 6 24 4 mg/liter mg/liter 12 2

0 0 XGE1694 XGE1281 XGE9974 XGE3383 XGE1694 XGE1281 XGE9974 XGE3383

Dutchman Point Flashing R Calibration Rhode River Dutchman Point Flashing R Calibration Rhode River Station Station

80 60 40 06/05/2000 07/18/2000 08/15/2000 09/19/2000 10/12/1999 10/25/1999 20 0

XGE1694 XGE1281 XGE9974 XGE3383 11/15/1999Dutchman Point 11/29/1999 FlashingR Calibration Station RhodeRiver

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 125 Document version: August 22, 2007 West River Low Flow Conditions (June to November) Stations are presented from left to right from downstream to upstream

Dissolved Inorganic Nitrogen Dissolved Inorganic Phosphorus

1.2 0.04

0.9 0.03

0.6 0.02 mg/liter mg/liter 0.3 0.01 0 0 XGE1694 XGE1281 XGE9974 XGE3383 XGE1694 XGE1281 XGE9974 XGE3383

Dutchman Point Flashing R Calibration Rhode River Dutchman Point Flashing R Calibration Rhode River Station Station

Total Nitrogen Total Phosphorus

2 0.24

1.5 0.18

1 0.12 mg/liter mg/liter 0.5 0.06

0 0 XGE1694 XGE1281 XGE9974 XGE3383 XGE1694 XGE1281 XGE9974 XGE3383

Dutchman Point Flashing R Calibration Rhode River Dutchman Point Flashing R Calibration Rhode River Station Station

80 60 40 06/05/2000 07/18/2000 08/15/2000 09/19/2000 10/12/1999 10/25/1999 20 0

XGE1694 XGE1281 XGE9974 XGE3383

11/15/1999Dutchman Point 11/29/1999 FlashingR Calibration Station RhodeRiver

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 126 Document version: August 22, 2007 WEST RIVER STATION LIST

Station Station Lat/Long Description Code names WEST RIVER XGE1694 Dutchman 38 51.640 Mid-river, south of Dutchman Point. Depth ~13 ft. Point 76 30.552 XGE1281 flashing R 38 51.248 Southeast of flashing R “4”. 11 FT. 76 31.889 XGE9974 Calibration 38 49.905 This calibration land station is collected by boat for Station 76 32.564 high/low surveys. Use coords 38 50.063, 76 32.583 for GPS. 6 ft. RHODE RIVER XGE3383 Rhode 38 53.273 This calibration land station is collected by boat for PS-23 River 76 31.721 high/low surveys. Use coords 38 53.193, 76 31.784 for GPS. 10 ft. Near Camp Lett’s Dock.

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 127 Document version: August 22, 2007

Patuxent River Watershed

Patuxent River Middle

Western Branch

Patuxent River Upper

Little Patuxent River

Middle Patuxent

Rocky Gorge Dam

Brighton Dam

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 128 Document version: August 22, 2007 PATUXENT RIVER SUB-BASIN (Sub-basin 02-13-11)

General Description (from 1998, 305 (b) Report) The Patuxent River sub-basin drains about 900 square miles of St. Mary's, Calvert, Charles, Anne Arundel, Prince George's, Howard, and Montgomery Counties and a very small portion of Frederick County.

The upper 25 percent of the sub-basin lies within the Piedmont Province, while the lower 75 percent lies within the Coastal Plain Province. Large water bodies include Western Branch, Little Patuxent River, Laurel Lake, Centennial Lake, Lake Elkhorn, Lake Kittamaqundi, Wilde Lake, and two large water supply reservoirs on the mainstem river above Laurel (T. Howard Duckett and Triadelphia Reservoirs) that supply water for Prince George's and Montgomery Counties in the Washington metropolitan area.

Although the sub-basin is situated between the Washington and Baltimore metropolitan areas, much of the sub-basin remains forested (46 percent). Almost 30 percent of the land is agricultural and 24 percent is developed. The middle portion of the segment bordered by I-95 and Route 214 is the most heavily developed area in the sub-basin and includes the cities of Laurel and Bowie, the communities of Jessup and Savage and much of Fort Meade, a US Army installation. Other communities include the Town of Columbia in the upper Little Patuxent River and Upper Marlboro on the Western Branch. A number of communities dot the lower, tidal portion of the Patuxent River including Broomes and Solomons Islands.

Surface waters are classified as Use I (water contact recreation and aquatic life), Use II (shellfish harvesting) or, above water supply intakes on the Patuxent and Little Patuxent Rivers, Use I-P (water contact recreation, aquatic life and public water supply), Use III-P (natural trout and public water supply) or Use IV-P (put-and-take trout and public water supply) (COMAR '26.08.02.08L). For the most recent information regarding specific use classes in this watershed, the reader is referred to the Code of Maryland Regulations.

The Patuxent River is designated as one of the State's Scenic Rivers. This designation is designed to preserve and protect the natural values of the river. The Patuxent River restoration effort has become a symbol of pride and success to much more than the State. US Senator Barbara Mikulski (MD) won designation of the Patuxent River as a National Estuarine Demonstration Project, ensuring additional support for new research opportunities in watershed restoration.

Jug Bay is designated as a component of the Chesapeake Bay National Estuarine Research Reserve in Maryland. A total of 241 acres of open water and 481 acres of adjoining wetlands and uplands (including Jug Bay Wetlands Sanctuary in Anne Arundel County and a portion of Patuxent River Park in Prince George's County) are protected for long-term estuarine research and monitoring and for estuarine education.

The State routinely monitors water quality at three CORE/Trend stations in the upper watershed, at 11 stations throughout the mainstem estuary, and at two stations on Western Branch as part of the State's Patuxent Estuary Monitoring Program and the Bay Tributary Monitoring Program. In addition to chemical sampling, phytoplankton and microzooplankton (three stations) and mesozooplankton (three stations) communities are monitored. Samples for nutrient bioassays are taken at two stations. Four fixed Long Term Benthic Macroinvertebrate program stations are monitored for estuarine benthos in addition to 25 Long Term Benthic Macroinvertebrate program sites selected randomly each year. The Maryland Biological Stream Survey (MBSS) collected water quality samples at 41 stations in 1994 and

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 129 Document version: August 22, 2007 at 80 stations in 1997. Additional water quality data in the lower estuary is available through MDE's shellfish monitoring program.

Water Quality Summary A TMDL to address the nutrient impairments to water quality in the Little Patuxent River (02131105) (Centennial Lake) received approval from EPA, April 24, 2002. The nutrient impairment in the Western Branch (02131103) was addressed by a BOD TMDL approved by EPA June 6, 2000. The Patuxent River Middle (02131102) will be addressed by a cooperative effort by the Bay States with the EPA Chesapeake Bay Program taking the lead. Water Quality Analyses were done indicating no nutrient impairments for the Patuxent River Upper (02131104) and the Middle Patuxent River (02131106), and received concurrence from EPA on February 2, 2007 and February 21, 2007 respectively. TMDLs to address the nutrient impairments in Rocky Gorge Dam (02131107); and Brighton Dam (02131108) are under development for 2007.

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 130 Document version: August 22, 2007 Upper, Lower Patuxent River and Western Branch Monitoring Stations Upper, Lower Patuxent River and Western Branch Monitoring Stations

Map Prepared by the Maryland Department of the Environment Science Services Administration Montgomery Park Business Center 1800 Washington Boulevard, Suite 540 Baltimore, Maryland 21230-1718 2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 131 Document version: August 22, 2007 Patuxent River Middle, Upper and Western Branch High Flow Conditions (December-May) Stations are presented from left to right from downstream to upstream

Chlorophyll a Dissolved Oxygen

8 12 6 9 4 6 µg/liter 2 mg/liter 3 0 0 Iron Pot below outfall Rt. 301 Route 3 Brock Bridge Iron Pot below Rt. 301 Route 3 Brock Landing Road Landing outfall Bridge Road

WXT0009 WXT0013 WXT0033 PXT0630 PXT0771 WXT0009 WXT0013 WXT0033 PXT0630 PXT0771

Total Suspended Solids Biological Oxygen Demand

16 8

12 6

8 4 mg/liter mg/liter 4 2

0 0 Iron Pot below Rt. 301 Route 3 Brock Iron Pot below outfall Rt. 301 Route 3 Brock Bridge Landing Road Landing outfall Bridge Road

WXT0009 WXT0013 WXT0033 PXT0630 PXT0771 WXT0009 WXT0013 WXT0033 PXT0630 PXT0771

01/02/1900 01/01/1900 01/01/1900 01/00/1900 01/00/1900 03/20/2000Iron Pot Landing 03/27/2000belowoutfall 04/24/2000 Rt. 301 05/15/2000Route 3 05/16/2000Brock Bridge Road

WXT0009 WXT0013 WXT0033 PXT0630 PXT0771

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 132 Document version: August 22, 2007 Patuxent River Middle, Upper and Western Branch High Flow Conditions (December-May) Stations are presented from left to right from downstream to upstream

Dissolved Inorganic Nitrogen Dissolved Inorganic Phosphorus

2.0 0.10

1.5 0.08

1.0 0.05 mg/liter 0.5 mg/liter 0.03

0.0 0.00 Iron Pot below Rt. 301 Route 3 Brock Iron Pot below outfall Rt. 301 Route 3 Brock Bridge Landing outfall Bridge Road Landing Road

WXT0009 WXT0013 WXT0033 PXT0630 PXT0771 WXT0009 WXT0013 WXT0033 PXT0630 PXT0771

Total Nitrogen Total Phosphorus

2.0 0.16

1.5 0.12

1.0 0.08 mg/liter mg/liter 0.5 0.04

0.0 0.00 Iron Pot below outfall Rt. 301 Route 3 Brock Bridge Iron Pot below outfall Rt. 301 Route 3 Brock Bridge Landing Road Landing Road WXT0009 WXT0013 WXT0033 PXT0630 PXT0771 WXT0009 WXT0013 WXT0033 PXT0630 PXT0771

01/02/1900 01/01/1900 01/01/1900 01/00/1900 01/00/1900 03/20/2000 03/27/2000 04/24/2000 05/15/2000 05/16/2000 Iron Pot Landing belowoutfall Rt. 301 Route 3 Brock Bridge Road

WXT0009 WXT0013 WXT0033 PXT0630 PXT0771

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 133 Document version: August 22, 2007 Patuxent River Middle, Upper and Western Branch Low Flow Conditions (June to November) Stations are presented from left to right from downstream to upstream

Chlorophyll a Dissolved Oxygen

8 12 6 9

4 6 mg/liter µg/liter 3 2 0 0 Iron Pot below Rt. 301 Route 3 Brock Iron Pot below Rt. 301 Route 3 Brock Landing outfall Bridge Landing outfall Bridge Road Road

WXT0009 WXT0013 WXT0033 PXT0630 PXT0771 WXT0009 WXT0013 WXT0033 PXT0630 PXT0771

Biological Oxygen Demand Total Suspended Solids

3.2 32

2.4 24

1.6 16 mg/liter mg/liter 0.8 8 0 0.0 Iron Pot below Rt. 301 Route 3 Brock Iron Pot below outfall Rt. 301 Route 3 Brock Bridge Landing Road Landing outfall Bridge Road

WXT0009 WXT0013 WXT0033 PXT0630 PXT0771 WXT0009 WXT0013 WXT0033 PXT0630 PXT0771

01/08/1900 01/06/1900 01/04/1900 01/02/1900 01/00/1900 07/17/2000Iron Pot Landing 07/18/2000belowoutfall 08/14/2000 Rt. 301 08/15/2000 Route 3 09/18/2000 Brock Bridge09/19/2000 Road

WXT0009 WXT0013 WXT0033 PXT0630 PXT0771

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 134 Document version: August 22, 2007 Patuxent River Middle, Upper and Western Branch Low Flow Conditions (June to November) Stations are presented from left to right from downstream to upstream

Dissolved Inorganic Nitrogen Dissolved Inorganic Phosphorus

2.0 0.60

1.5 0.45

1.0 0.30

mg/liter 0.5 mg/liter 0.15

0.0 0.00 Iron Pot below Rt. 301 Route 3 Brock Iron Pot below Rt. 301 Route 3 Brock Landing outfall Bridge Landing outfall Bridge Road Road

WXT0009 WXT0013 WXT0033 PXT0630 PXT0771 WXT0009 WXT0013 WXT0033 PXT0630 PXT0771

Total Nitrogen Total Phosphorus

2.4 0.6 1.8 0.5 1.2 0.3

mg/liter 0.6 mg/liter 0.2 0.0 0.0 Iron Pot below Rt. 301 Route 3 Brock Iron Pot below Rt. 301 Route 3 Brock Landing outfall Bridge Road Landing outfall Bridge Road

WXT0009 WXT0013 WXT0033 PXT0630 PXT0771 WXT0009 WXT0013 WXT0033 PXT0630 PXT0771

01/08/1900 01/06/1900 01/04/1900 01/02/1900 01/00/1900 07/17/2000Iron Pot Landing 07/18/2000belowoutfall 08/14/2000 Rt. 301 08/15/2000 Route 3 09/18/2000 Brock Bridge09/19/2000 Road WXT0009 WXT0013 WXT0033 PXT0630 PXT0771

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 135 Document version: August 22, 2007 WESTERN BRANCH AND PATUXENT RIVER MIDDLE STATION LIST

Station Station Lat/Long Description Code Names WESTERN BRANCH WXT0009 Iron Pot 38 47.554 Iron Pot Landing. Near stream confluence and old Landing 76 43.769 duck blind. Approx. 3-4 ft. WXT0013 Below outfall 38 47.806 ¼ Mile below outfall. Approx. 3-4 ft. 76 43.436 WXT0033 Rt. 301 38 48.560 Bridge sample at Rt. 301. 76 44.489

UPPER PATUXENT RIVER STATION LIST

Station Station Lat/Long Description Code Names UPPER PATUXENT RIVER PXT0630 Route 3 38 59.311 Route 3 bridge crossing. 76 42.316 PXT0771 Brock Bridge 39 04.321 Brock Bridge Road crossing. Road 76 50.302

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 136 Document version: August 22, 2007 Little Patuxent River Little Patuxent River Monitoring Stations

Map Prepared by the Maryland Department of the Environment Science Services Administration Montgomery Park Business Center 1800 Washington Boulevard, Suite 540 Baltimore, Maryland 21230-1718

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 137 Document version: August 22, 2007

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 138 Document version: August 22, 2007 Little Patuxent River (main) High Flow Conditions (December-May) Stations are presented from left to right from downstream to upstream

Chlorophyll a Dissolved Oxygen

10 16 7.5 12 5 8

µg/liter 2.5 mg/liter 4 0 0 Rd Old MD 198 MD 198 Old USGS Post USGS Post Annapolis Rt 1 USGS Guilford Rd Rt 1 USGS Guilford Rd Conway Rd Conway Rd Patuxent Rd Patuxent Rd Annapolis Rd Merriweather Merriweather LXT0032 LXT0068 LXT0116 LXT0173 LXT0200 LXT0248 LXT0277 LXT0032LXT0068LXT0116LXT0173LXT0200LXT0248LXT0277

Total Suspended Solids Biological Oxygen Demand

120 90 8 6 60 4 30 2 mg/liter 0 mg/liter 0 MD 198 MD 198 Old USGS Post Old USGS Post Rt 1 USGS Guilford Rd Rt 1 USGS Conway Rd Guilford Rd Patuxent Rd Conway Rd Patuxent Rd Annapolis Rd Merriweather Annapolis Rd Merriweather LXT0032LXT0068LXT0116LXT0173LXT0200LXT0248LXT0277 LXT0032LXT0068LXT0116LXT0173LXT0200LXT0248LXT0277

0.2 12/01/1999 12/15/1999 01/13/2000 02/24/2000 03/01/2000 03/20/2000 0.1

0

Conway Rd PatuxentRd MD 198 Rt1 USGS Guilford Rd USGS Merriweather Post Old Annapolis Rd 03/27/2000 04/24/2000 05/15/2000 05/16/2000 05/25/2000

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 139 Document version: August 22, 2007 Little Patuxent River (main) High Flow Conditions (December-May) Stations are presented from left to right from downstream to upstream

Dissolved Inorganic Nitrogen Dissolved Inorganic Phospohorus

3.2 0.08 2.4 0.06 1.6 0.04 mg/liter

0.8 mg/liter 0.02 0 0 MD 198 MD 198 Old Old USGS USGS Post Post Rt 1 USGS Rt 1 USGS Guilford Rd Guilford Rd Conway Rd Conway Rd Patuxent Rd Patuxent Rd Annapolis Rd Annapolis Rd Merriweather Merriweather LXT0032 LXT0068 LXT0116 LXT0173 LXT0200 LXT0248 LXT0277 LXT0032LXT0068 LXT0116LXT0173LXT0200 LXT0248LXT0277

Total Nitrogen Total Phosphorus

0.2 4 3 0.15 2 0.1 mg/liter mg/liter 1 0.05 0 0 Rd Rd Old Old MD 198 MD 198 Post Post USGS USGS Annapolis Annapolis Rt 1 USGS Rt 1 USGS Guilford Rd Guilford Rd Conway Rd Conway Rd Patuxent Rd Patuxent Rd Merriweather Merriweather LXT0032 LXT0068 LXT0116 LXT0173 LXT0200 LXT0248 LXT0277 LXT0032LXT0068LXT0116LXT0173 LXT0200 LXT0248LXT0277

0.2 12/01/1999 12/15/1999 01/13/2000 02/24/2000 03/01/2000 03/20/2000 0.1

0

Conway Rd PatuxentRd MD 198 Rt1 USGS Guilford Rd USGS Merriweather Post Old Annapolis Rd 03/27/2000 04/24/2000 05/15/2000 05/16/2000 05/25/2000

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 140 Document version: August 22, 2007 Little Patuxent River (main) Low Flow Conditions (June to November) Stations are presented from left to right from downstream to upstream

Dissolved Oxygen Chlorphyll a

8 16 6 12 4 8 mg/liter µg/liter 2 4 0 0 Rd Rd Old Old MD 198 MD 198 Post Post USGS USGS Annapolis Annapolis Rt 1 USGS Rt 1 USGS Guilford Rd Guilford Rd Conway Rd Conway Rd Patuxent Rd Patuxent Rd Merriweather Merriweather LXT0032 LXT0068 LXT0116 LXT0173 LXT0200 LXT0248 LXT0277 LXT0032 LXT0068 LXT0116 LXT0173 LXT0200 LXT0248 LXT0277

Total Suspended Solids Biological Oxygen Demand

20 4 15 3 10 2 mg/liter 5 mg/liter 1 0 0 MD 198 Rd Old Old USGS Post MD 198 Post USGS Rt 1 USGS Annapolis Guilford Rd Conway Rd Patuxent Rd Rt 1 USGS Guilford Rd Conway Rd Annapolis Rd Patuxent Rd Merriweather Merriweather LXT0032 LXT0068 LXT0116 LXT0173 LXT0200 LXT0248 LXT0277 LXT0032 LXT0068 LXT0116 LXT0173 LXT0200 LXT0248 LXT0277

8 6 06/21/2000 07/17/2000 07/18/2000 08/14/2000 08/15/2000 09/18/2000 09/19/2000 4 2 0 10/14/1999Conway Rd 10/27/1999PatuxentRd 11/17/1999MD 198 Rt1 USGS Guilford Rd USGS Merriweather Post Old Annapolis Rd

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 141 Document version: August 22, 2007 Little Patuxent River (main) Low Flow Conditions (June to November) Stations are presented from left to right from downstream to upstream

Dissolved Inorganic Nitrogen Dissolved Inorganic Phosphorus

3.2 0.2 2.4 0.15 1.6 0.1 0.8 0.05 mg/liter mg/liter 0 0 MD 198 MD 198 Old Old USGS USGS Post Post Rt 1 USGS Rt 1 USGS Guilford Rd Guilford Rd Conway Rd Conway Rd Patuxent Rd Patuxent Rd Annapolis Rd Annapolis Rd Merriweather Merriweather LXT0032 LXT0068LXT0116 LXT0173 LXT0200LXT0248 LXT0277 LXT0032 LXT0068 LXT0116 LXT0173 LXT0200 LXT0248 LXT0277

Total Nitrogen Total Phosphorus

4 1.2 3 0.9 2 0.6 mg/liter 1 mg/liter 0.3 0 0 Rd Rd Old Old MD 198 MD 198 Post Post USGS USGS Annapolis Annapolis Rt 1 USGS Rt 1 USGS Guilford Rd Guilford Rd Conway Rd Conway Rd Patuxent Rd Patuxent Rd Merriweather Merriweather LXT0032 LXT0068 LXT0116 LXT0173 LXT0200 LXT0248 LXT0277 LXT0032 LXT0068 LXT0116 LXT0173 LXT0200 LXT0248 LXT0277

8 6 06/21/2000 07/17/2000 07/18/2000 08/14/2000 08/15/2000 09/18/2000 09/19/2000 4 2 0 10/14/1999Conway Rd 10/27/1999PatuxentRd 11/17/1999MD 198 Rt1 USGS Guilford Rd USGS Merriweather Post Old Annapolis Rd

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 142 Document version: August 22, 2007 Little Patuxent River (tributaries) High Flow Conditions (December-May) Stations are presented from left to right from downstream to upstream

Chloropyll a Dissolved Oxygen

16 16 12 12 8 8 µg/liter 4 mg/liter 4 0 0 Rte 1 Rte 1 Rte 32 Trib Rte 32 Rd Trib Rd Dorsey Dorsey Run Rd Run Run Rd Lane Run Lane Unnamed Unnamed Centennial Pavillion H. Centennial Hammonds Pavillion H. Hammonds HAM0006 DOR0020 DOR0032 UVC0003 DOR0048 ZAI0001 ZAI0012 HAM0006 DOR0020 DOR0032 UVC0003 DOR0048 ZAI0001 ZAI0012

Total Suspended Solids Biological Oxygen Demand

16 8 12 6 8 4 mg/liter

mg/liter 4 2 0 0 Rte 1 Rte 1 Rte 32 Trib Rd Rte 32 Trib Rd Dorsey Run Rd Dorsey Run Lane Run Rd Run Lane Unnamed Unnamed Centennial Pavillion H. Centennial Hammonds Pavillion H. Hammonds HAM0006 DOR0020 DOR0032 UVC0003 DOR0048 ZAI0001 ZAI0012 HAM0006 DOR0020 DOR0032 UVC0003 DOR0048 ZAI0001 ZAI0012

01/06/1900 12/01/1999 12/15/1999 01/13/2000 02/24/2000 03/01/2000 03/20/2000 03/27/2000 01/04/1900

01/02/1900

01/00/1900 04/24/2000HammondsRun 05/15/2000Rte 32 05/16/2000Dorsey Run Rd 05/25/2000Unnamed Trib Rte 1 Pavillion H. Rd Centennial Lane

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 143 Document version: August 22, 2007 Little Patuxent River (tributaries) High Flow Conditions (December-May) Stations are presented from left to right from downstream to upstream

Dissolved Inorganic Nitrogen Dissolved Inorganic Phosphorus

5 2 4 1 3 1 mg/liter 1 mg/liter 0 0 0 Rte 1 Rte 1 Rte 32 Rte 32 Trib Trib Rd Rd Dorsey Dorsey Run Rd Run Rd Run Lane Run Lane Unnamed Unnamed Centennial Centennial Pavillion H. Pavillion H. Hammonds Hammonds HAM0006 DOR0020 DOR0032 UVC0003 DOR0048 ZAI0001 ZAI0012 HAM0006 DOR0020 DOR0032 UVC0003 DOR0048 ZAI0001 ZAI0012

Total Nitrogen Total Phosphorus

6 2 5 2 3 1

mg/liter 2 mg/liter 1 0 0 Rte 1 Rte 1 Rte 32 Trib Rte 32 Trib Rd Rd Dorsey Run Rd Dorsey Run Rd Run Run Lane Lane Unnamed Unnamed Centennial Centennial Pavillion H. Pavillion H. Hammonds Hammonds HAM0006 DOR0020 DOR0032 UVC0003 DOR0048 ZAI0001 ZAI0012 HAM0006 DOR0020 DOR0032 UVC0003 DOR0048 ZAI0001 ZAI0012

01/06/1900

01/04/1900 12/01/1999 12/15/1999 01/13/2000 02/24/2000 03/01/2000 03/20/2000

01/02/1900

01/00/1900 03/27/2000HammondsRun 04/24/2000Rte 32 Dorsey Run Rd 05/15/2000 Unnamed Trib 05/16/2000Rte 1 05/25/2000Pavillion H. Rd Centennial Lane

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 144 Document version: August 22, 2007 Little Patuxent River (tributaries) Low Flow Conditions (June to November) Stations are presented from left to right from downstream to upstream

Chlorophyll a Dissolved Oxygen

20 12 15 9 10 6 µg/liter 5 mg/liter 3 0 0 Rte 1 Rte 1 Rte 32 Trib Rd Rte 32 Trib Rd Dorsey Run Rd Dorsey Run Run Rd Lane Run Lane Unnamed Unnamed Centennial Pavillion H. Centennial Hammonds Pavillion H. Hammonds HAM0006DOR0020 DOR0032 UVC0003 DOR0048 ZAI0001 ZAI0012 HAM0006DOR0020DOR0032UVC0003DOR0048 ZAI0001 ZAI0012

Biological Oxygen Demand Total Suspended Solids

10 100 8 75 5 50

mg/liter 3 mg/liter 25 0 0 Rte 1 Rte 1 Rte 32 Trib Rd Rte 32 Trib Rd Dorsey Run Rd Dorsey Run Run Rd Lane Run Lane Unnamed Unnamed Centennial Pavillion H. Centennial Hammonds Pavillion H. Hammonds HAM0006DOR0020DOR0032UVC0003DOR0048 ZAI0001 ZAI0012 HAM0006DOR0020DOR0032 UVC0003DOR0048 ZAI0001 ZAI0001

01/06/1900 06/21/2000 07/17/2000 07/18/2000 08/14/2000 08/15/2000 09/18/2000 09/19/2000 01/04/1900

01/02/1900

01/00/1900 10/14/1999HammondsRun 10/27/1999Rte 32 Dorsey Run Rd Unnamed Trib Rte 1 Pavillion H. Rd Centennial Lane

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 145 Document version: August 22, 2007 Little Patuxent River (tributaries) Low Flow Conditions (June to November) Stations are presented from left to right from downstream to upstream

Dissolved Inorganic Nitrogen Dissolved Inorganic Phosphorus

5 2 4 2 2 1

mg/liter 1 mg/liter 1 0 0 Rte 1 Rte 1 Rte 32 Trib Rte 32 Trib Rd Rd Dorsey Run Rd Dorsey Run Rd Run Run Lane Lane Unnamed Unnamed Centennial Centennial Pavillion H. Pavillion H. Hammonds Hammonds HAM0006 DOR0020 DOR0032 UVC0003 DOR0048 ZAI0001 ZAI0012 HAM0006 DOR0020 DOR0032 UVC0003 DOR0048 ZAI0001 ZAI0012

Total Nitrogen Total Phosphorus

5 2 4 2 2 1 mg/liter 1 mg/liter 1 0 0 Rte 1 Rte 1 Rte 32 Trib Rte 32 Rd Trib Rd Dorsey Dorsey Run Rd Run Run Rd Lane Run Lane Unnamed Unnamed Centennial Pavillion H. Centennial Hammonds Pavillion H. Hammonds HAM0006 DOR0020 DOR0032 UVC0003 DOR0048 ZAI0001 ZAI0012 HAM0006 DOR0020 DOR0032 UVC0003 DOR0048 ZAI0001 ZAI0012

01/06/1900 01/04/1900 06/21/2000 07/17/2000 07/18/2000 08/14/2000 08/15/2000 09/18/2000 01/02/1900 01/00/1900 09/19/2000HammondsRun 10/14/1999Rte 32 Dorsey Run Rd 10/27/1999 Unnamed Trib Rte 1 Pavillion H. Rd Centennial Lane

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 146 Document version: August 22, 2007

LITTLE PATUXENT RIVER STATION LIST

Station Station Lat/Long Description Code Names LITTLE PATUXENT RIVER LXT0032 Conway Rd. 39 01.412 424 (Conway Road) bridge crossing. 76 42.087 LXT0068 Patuxent Rd. 39 03.554 Patuxent Road crossing. 76 43.912 LXT0116 MD 198 39 05.526 MD 198 crossing. Park in sandy lot. Bank sample 76 46.092 above STP outfall. LXT0173 Rt. 1 USGS 39 08.067 Southbound lane of Rte 1 crossing. USGS Gage 76 48.985 across Rt. 1. LXT0200 Guilford Rd. 39 10.057 Guilford Road crossing. USGS Gage. Read staff. USGS 76 51.077 LXT0248 Merriweather 39 12.555 Merriweather Post access road off southbound US 29 Post 76 51.359 crossing, below Lake Kittamaquandi. LXT0277 Old Annapolis 39 14.672 Old Annapolis Road Road 76 50.787 CENTENNIAL LAKE ZAI0012 Centennial 39 14.436 Centennial Lane bridge – sample on lake side. Lane 76 52.085 ZAI0001 Pavillion H 39 14.443 Pavillion H Road, off of Woodland Road. Road 76 51.157 DORSEY RUN DOR0020 Rte 32 39 07.960 Rte 32/ Guilford Road crossing. Bank sample 76 46.801 between from least dangerous road. DOR0032 Dorsey Run 39 08.971 Dorsey Run Road crossing. Take flow upstream, left Rd. 76 47.201 side. DOR0048 Rte 1 39 10.135 Rte 1 crossing (north crossing). Park in the Red Roof 76 47.302 Inn driveway. UNNAMED TRIB (of Dorsey Run) UVC0003 Unnamed 39 09.422 Rte 1 crossing (south crossing). Park on northbound Trib 76 47.832 side, sample from southbound side (deeper). HAMMONDS RUN (tributary of Little Patuxent) HAM0006 Hammonds 39 07.433 Rte 1 crossing. Bank sample from BG&E gravel drive. Run 76 49.496

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 147 Document version: August 22, 2007 Middle Patuxent River Middle Patuxent River Monitoring Stations

Map Prepared by the Maryland Department of the Environment Science Services Administration Montgomery Park Business Center 1800 Washington Boulevard, Suite 540 Baltimore, Maryland 21230-1718

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 148 Document version: August 22, 2007 Middle Patuxent River High Flow Conditions (December-May) Stations are presented from left to right from downstream to upstream

Chlorophyll a Dissolved Oxygen

6 20 4.5 15 3 10 µg/liter 1.5 mg/liter 5 0 0 Murry Hill Drive Harriet Tubman Bragdon Road Route 32 Murry Hill Drive Harriet Tubman Bragdon Road Route 32 Road Road

MXT0021 MXT0068 MXT0097 MXT0183 MXT0021 MXT0068 MXT0097 MXT0183

Total Suspended Solids Biological Oxygen Demand

40 4

30 3

20 2 mg/liter mg/liter 10 1

0 0 Murry Hill Drive Harriet Tubman Bragdon Road Route 32 Murry Hill Drive Harriet Tubman Bragdon Road Route 32 Road Road

MXT0021 MXT0068 MXT0097 MXT0183 MXT0021 MXT0068 MXT0097 MXT0183

4 2 12/01/1999 12/15/1999 01/13/2000 02/24/2000 03/01/2000 04/24/2000 0

Murry Hill Drive HarrietTubman Road BragdonRoad Route32

MXT0021 MXT0068 MXT0097 MXT0183 05/15/2000 05/25/2000

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 149 Document version: August 22, 2007 Middle Patuxent River High Flow Conditions (December-May) Stations are presented from left to right from downstream to upstream

Dissolved Inorganic Nitrogen Dissolved Inorganic Phosphorus

4 0.032

3 0.024

2 0.016 mg/liter 1 mg/liter 0.008

0 0 Murry Hill Drive Harriet Tubman Bragdon Road Route 32 Murry Hill Drive Harriet Tubman Bragdon Road Route 32 Road Road

MXT0021 MXT0068 MXT0097 MXT0183 MXT0021 MXT0068 MXT0097 MXT0183

Total Nitrogen Total Phosphorus

4 0.12

3 0.09

2 0.06

mg/liter 1 mg/liter 0.03

0 0 Murry Hill Drive Harriet Tubman Bragdon Road Route 32 Murry Hill Drive Harriet Tubman Bragdon Road Route 32 Road Road

MXT0021 MXT0068 MXT0097 MXT0183 MXT0021 MXT0068 MXT0097 MXT0183

4 2 0 12/01/1999Murry Hill Drive 12/15/1999 01/13/2000HarrietTubman Road 02/24/2000 Bragdon03/01/2000Road 03/20/2000 Route32 05/25/2000 MXT0021 MXT0068 MXT0097 MXT0183

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 150 Document version: August 22, 2007 Middle Patuxent River Low Flow Conditions (June to November) Stations are presented from left to right from downstream to upstream

Chlorophyll a Dissolved Oxygen

2.8 16

2.1 12

1.4 8 µg/liter 0.7 mg/liter 4

0 0 Murry Hill Drive Harriet Tubman Bragdon Road Route 32 Murry Hill Drive Harriet Tubman Bragdon Road Route 32 Road Road

MXT0021 MXT0068 MXT0097 MXT0183 MXT0021 MXT0068 MXT0097 MXT0183

Total Suspended Sediments Biological Oxygen Demand

20 3.2 15 2.4 10 1.6 mg/liter 5 mg/liter 0.8

0 0 Murry Hill Drive Harriet Tubman Bragdon Road Route 32 Murry Hill Drive Harriet Tubman Bragdon Road Route 32 Road Road

MXT0021 MXT0068 MXT0097 MXT0183 MXT0021 MXT0068 MXT0097 MXT0183

1.5 1 0.5 0 06/21/2000 Murry Hill Drive 07/17/2000 08/14/2000HarrietTubman Road 09/18/2000 Bragdon10/14/1999Road 10/27/1999 Route32 11/17/1999

MXT0021 MXT0068 MXT0097 MXT0183

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 151 Document version: August 22, 2007 Middle Patuxent River Low Flow Conditions (June to November) Stations are presented from left to right from downstream to upstream

Dissolved Inorganic Nitrogen Dissolved Inorganic Phosphorus

4 0.032

3 0.024

2 0.016 mg/liter mg/liter 1 0.008 0 0 Murry Hill Drive Harriet Tubman Bragdon Road Route 32 Murry Hill Drive Harriet Tubman Bragdon Road Route 32 Road Road MXT0021 MXT0068 MXT0097 MXT0183 MXT0021 MXT0068 MXT0097 MXT0183

Total Nitrogen Total Phosphorus

4 1.2 3 0.9 2 0.6

mg/liter 1 mg/liter 0.3 0 0 Murry Hill Drive Harriet Tubman Bragdon Road Route 32 Murry Hill Drive Harriet Tubman Bragdon Road Route 32 Road Road

MXT0021 MXT0068 MXT0097 MXT0183 MXT0021 MXT0068 MXT0097 MXT0183

1.5 1 0.5 0 06/21/2000Murry Hill Drive 07/17/2000 08/14/2000HarrietTubman Road 09/18/2000 Bragdon10/14/1999Road 10/27/1999 Route32 11/17/1999 MXT0021 MXT0068 MXT0097 MXT0183

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 152 Document version: August 22, 2007 MIDDLE PATUXENT STATION LIST

Station Station Lat/Long Description Code Names MIDDLE PATUXENT RIVER MXT0021 Murry Hill 39 09.609 Murry Hill Drive crossing. Drive 76 51.128 MXT0068 Harriet 39 11.246 Harriet Tubman Road foot bridge crossing off Cedar Tubman 76 53.586 Lane. Road MXT0097 Bragdon 39 13.743 Bragdon Road off Route 108 crossing, bank sample. Road 76 55.039 MXT0183 Route 32 39 17.231 Route 32, Middle Patuxent Bridge crossing. 76 57.522

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 153 Document version: August 22, 2007 Rocky Gorge Dam Rocky Gorge Dam Monitoring Stations

Map Prepared by the Maryland Department of the Environment Science Services Administration Montgomery Park Business Center 1800 Washington Boulevard, Suite 540 Baltimore, Maryland 21230-1718

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 154 Document version: August 22, 2007 Rocky Gorge Dam High Flow Conditions (December-May) Stations are presented from left to right from downstream to upstream

Chlorophyll a Dissolved Oxygen

20 16

15 12

10 8

µg/liter 5 mg/liter 4

0 0 RGR Cove RGR Cove Dam Dam Rocky Gorge Rocky Gorge Dam Dam Run Run RGR 1 RGR RGR 2 RGR 1 RGR RGR 2 Rock Rock Brighton Brighton Crossing Crossing Hawlings Hawlings PXT0809 PXT0831 PXT0846PXT0860PXT0880PXT0971HAW0010 PXT0809PXT0831PXT0846PXT0860PXT0880PXT0971HAW0010

Total Suspended Solids Biological Oxygen Demand

28 4.8

21 3.6 14 2.4 mg/liter 7 mg/liter 1.2 0 0 RGR RGR Dam Cove Dam Cove Rocky Gorge Dam Rocky Gorge Dam RGR 1 RGR 2 RGR 1 RGR 2 RGR Run RGR Run Rock Rock Brighton Brighton Crossing Crossing Hawlings Hawlings PXT0809 PXT0831 PXT0846 PXT0860 PXT0880 PXT0971HAW0010 PXT0809PXT0831PXT0846PXT0860PXT0880PXT0971HAW0010

0.06 0.04 12/01/1999 12/15/1999 01/13/2000 02/24/2000 03/01/2000 03/20/2000 0.02

0

Rocky Gorge Dam RGR Cove RGR 1 RGR Rock Crossing RGR 2 Brighton Dam HawlingsRun 04/24/2000 05/15/2000 05/25/2000

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 155 Document version: August 22, 2007 Rocky Gorge Dam High Flow Conditions (December-May) Stations are presented from left to right from downstream to upstream

Dissolved Inorganic Nitrogen Dissolved Inorganic Phosphorus

4 0.052

3 0.039

2 0.026 mg/liter mg/liter 1 0.013

0 0 RGR Dam Cove RGR Cove Dam Rocky Gorge Dam RGR 1 RGR 2 RGR Run Rock Rocky Gorge Dam Run RGR 1 RGR RGR 2 Rock Brighton Crossing Brighton Hawlings Crossing Hawlings PXT0809 PXT0831 PXT0846 PXT0860 PXT0880 PXT0971HAW0010 PXT0809PXT0831PXT0846PXT0860PXT0880PXT0971HAW0010

Total Nitrogen Total Phosphorus

4.8 0.12 3.6 0.09 2.4 0.06 mg/liter mg/liter 1.2 0.03 0 0 RGR RGR Dam Cove Dam Cove Rocky Gorge Dam Rocky Gorge Dam RGR 1 RGR 2 RGR 1 RGR 2 RGR Run RGR Run Rock Rock Brighton Brighton Crossing Crossing Hawlings Hawlings PXT0809 PXT0831 PXT0846 PXT0860 PXT0880 PXT0971HAW0010 PXT0809PXT0831PXT0846PXT0860PXT0880PXT0971HAW0010

0.06 12/01/1999 12/15/1999 01/13/2000 02/24/2000 03/01/2000 03/20/2000 0.04

0.02

0 04/24/2000Rocky Gorge Dam RGR05/15/2000 Cove RGR 1 05/25/2000 RGR Rock Crossing RGR 2 Brighton Dam HawlingsRun

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 156 Document version: August 22, 2007 Rocky Gorge Dam Low Flow Conditions (June to November) Stations are presented from left to right from downstream to upstream

Chlorophyll a Dissolved Oxygen

24 12

18 9

12 6 mg/liter µg/liter 6 3

0 0 RGR Cove RGR Cove Dam Dam Rocky Gorge Rocky Gorge Dam Dam Run Run RGR 1 RGR RGR 2 RGR 1 RGR RGR 2 Rock Rock Brighton Brighton Crossing Crossing Hawlings Hawlings PXT0809PXT0831PXT0846 PXT0860PXT0880PXT0971HAW0010 PXT0809PXT0831PXT0846PXT0860PXT0880PXT0971HAW0010

Total Suspended Solids Biological Oxygen Demand

28 6

21 4.5

14 3 mg/liter mg/liter 7 1.5

0 0 RGR Dam Cove RGR Cove Dam Rocky Gorge Dam RGR 1 RGR 2 RGR Run Rock Rocky Gorge Dam Run RGR 1 RGR RGR 2 Rock Brighton Crossing Brighton Hawlings Crossing Hawlings PXT0809 PXT0831 PXT0846 PXT0860PXT0880PXT0971HAW0010 PXT0809 PXT0831 PXT0846 PXT0860PXT0880 PXT0971HAW0010

3

2

1 06/21/2000 07/17/2000 08/14/2000 09/18/2000 10/14/1999 10/27/1999 11/17/1999

0

Rocky Gorge Dam RGR Cove RGR 1 RGR Rock Crossing RGR 2 Brighton Dam HawlingsRun

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 157 Document version: August 22, 2007 Rocky Gorge Dam Low Flow Conditions (June to November) Stations are presented from left to right from downstream to upstream

Dissolved Inorganic Nitrogen Dissolved Inorganic Phosphorus

2.4 0.016 1.8 0.012 1.2 0.008 mg/liter 0.6 mg/liter 0.004 0 0 RGR RGR Dam Cove Dam Cove Rocky Gorge Dam Rocky Gorge Dam RGR 1 RGR 2 RGR 1 RGR 2 RGR Run RGR Run Rock Rock Brighton Brighton Crossing Crossing Hawlings Hawlings PXT0809 PXT0831 PXT0846 PXT0860 PXT0880 PXT0971HAW0010 PXT0809PXT0831PXT0846PXT0860PXT0880PXT0971HAW0010

Total Nitrogen Total Phosphorus

2.8 0.08

2.1 0.06

1.4 0.04 mg/liter mg/liter 0.7 0.02

0 0 RGR Cove RGR Cove Dam Dam Rocky Gorge Rocky Gorge Dam Dam Run Run RGR 1 RGR RGR 2 RGR 1 RGR RGR 2 Rock Rock Brighton Brighton Crossing Crossing Hawlings Hawlings PXT0809 PXT0831 PXT0846 PXT0860 PXT0880 PXT0971HAW0010 PXT0809PXT0831PXT0846PXT0860PXT0880PXT0971HAW0010

3

2 1 06/21/2000 07/17/2000 08/14/2000 09/18/2000 10/14/1999 10/27/1999 11/17/1999 0

Rocky Gorge Dam RGR Cove RGR 1 RGR Rock Crossing RGR 2 Brighton Dam HawlingsRun

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 158 Document version: August 22, 2007 ROCKY GORGE RESERVIOR STATION LIST

Station Station Code Lat/Long Description Names ROCKY GORGE RESERVOIR PXT0831 RGR Cove 39 07.395 Off 2nd cove above dam. 74 ft. 76 52.826 PXT0846 RGR 1 39 07.600 44 ft. 76 53.931 PXT0860 RGR Rock 39 07.939 Upstream of rock crossing. Crossing 76 55.146 PXT0880 RGR 2 39 07.769 16 ft. 76 56.791 UPPER PATUXENT RIVER PXT0809 Rocky Gorge 39 06.934 Follow road to base of Rocky Gorge dam. Need card to Dam 76 52.404 access gate, read staff. PXT0971 Brighton Dam 39 11.506 Brighton Dam at Brighton Dam. Take sample from handicap 77 00.278 access ramp. See ranger for flow and gate access. HAWLINGS RUN (tributary of Patuxent River) HAW0010 Hawlings Run 39 10.501 Route 650 crossing. USGS Gage downstream side of bridge. 77 01.279

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 159 Document version: August 22, 2007 Brighton Dam Brighton Dam Monitoring Stations

Map Prepared by the Maryland Department of the Environment Science Services Administration Montgomery Park Business Center 1800 Washington Boulevard, Suite 540 Baltimore, Maryland 21230-1718

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 160 Document version: August 22, 2007 Brighton Dam High Flow Conditions (December-May) Stations are presented from left to right from downstream to upstream

Dissolved Oxygen Chlorophyll a

20 16 15 12 10 8 µg/liter 5 mg/liter 4 0 0 R R Tria Tria Tria Tria Tria 45 ft 35 ft 25 ft Tria Tria Tria Tria Tria Upper 45 ft 35 ft 25 ft Upper 11.9 ft 11.5 ft 11.9 ft 11.5 ft Patuxent Cattail Cr Patuxent Reservoir Reservoir Reservoir Reservoir Reservoir Cattail Cr Reservoir Reservoir Reservoir Reservoir Reservoir PXT0977 ZTR0004 PXT0987 PXT1000 PXT1014 PXT0972 CTC0019 PXT0977 ZTR0004 PXT0987 PXT1000 PXT1014 PXT0972 CTC0019

Biological Oxygen Demand Total Suspended Solids

28 5.2

21 3.9

14 2.6 mg/liter mg/liter 7 1.3

0 0.0 R R Tria Tria Tria Tria Tria Tria Tria Tria Tria Tria 45 ft 35 ft 25 ft 45 ft 35 ft 25 ft Upper Upper 11.9 ft 11.5 ft 11.9 ft 11.5 ft Patuxent Patuxent Cattail Cr Cattail Cr Reservoir Reservoir Reservoir Reservoir Reservoir Reservoir Reservoir Reservoir Reservoir Reservoir PXT0977 ZTR0004 PXT0987 PXT1000 PXT1014 PXT0972 CTC0019 PXT0977 ZTR0004 PXT0987 PXT1000 PXT1014 PXT0972 CTC0019

01/06/1900 01/04/1900 12/01/1999 12/15/1999 01/13/2000 02/24/2000 03/01/2000 03/20/2000 04/24/2000

01/02/1900

01/00/1900 05/15/2000TriaReservoir 45 ft 05/25/2000Tria Reservoir 11.9 ft TriaReservoir 35 ft TriaReservoir 25 ft Tria Reservoir 11.5 ft Upper Patuxent R Cattail Cr

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 161 Document version: August 22, 2007 Brighton Dam High Flow Conditions (December-May) Stations are presented from left to right from downstream to upstream

Dissolved Inorganic Nitrogen Dissolved Inorganic Phosphorus

4.8 0.06

3.6 0.05 2.4 0.03

mg/liter 1.2 mg/liter 0.02

0.0 0.00 R R Tria Tria Tria Tria Tria 45 ft 35 ft 25 ft Upper Tria Tria Tria Tria Tria 45 ft 35 ft 25 ft Upper 11.9 ft 11.5 ft 11.9 ft 11.5 ft Patuxent Cattail Cr Patuxent Reservoir Reservoir Reservoir Reservoir Reservoir Cattail Cr Reservoir Reservoir Reservoir Reservoir Reservoir PXT0977 ZTR0004 PXT0987 PXT1000 PXT1014 PXT0972 CTC0019 PXT0977 ZTR0004 PXT0987 PXT1000 PXT1014 PXT0972 CTC0019

Total Nitrogen Total Phosphorus

6.0 0.12

4.5 0.09

3.0 0.06 mg/liter mg/liter 1.5 0.03

0.0 0.00 R R Tria Tria Tria Tria Tria 45 ft 35 ft 25 ft Tria Tria Tria Tria Tria 45 ft 35 ft 25 ft Upper Upper 11.9 ft 11.5 ft 11.9 ft 11.5 ft Patuxent Patuxent Cattail Cr Cattail Cr Reservoir Reservoir Reservoir Reservoir Reservoir Reservoir Reservoir Reservoir Reservoir Reservoir PXT0977 ZTR0004 PXT0987 PXT1000 PXT1014 PXT0972 CTC0019 PXT0977 ZTR0004 PXT0987 PXT1000 PXT1014 PXT0972 CTC0019

01/06/1900

01/04/1900 12/01/1999 12/15/1999 01/13/2000 02/24/2000 03/01/2000 03/20/2000 04/24/2000

01/02/1900

01/00/1900 05/15/2000TriaReservoir 45 ft 05/25/2000Tria Reservoir 11.9 ft TriaReservoir 35 ft TriaReservoir 25 ft Tria Reservoir 11.5 ft Upper Patuxent R Cattail Cr

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 162 Document version: August 22, 2007 Brighton Dam Low Flow Conditions (June to November) Stations are presented from left to right from downstream to upstream

Chlorophyll a Dissolved Oxygen

40 16 30 12 20 8

µg/liter 10 mg/liter 4 0 0 R R Tria Tria Tria Tria Tria Tria Tria Tria Tria Tria 45 ft 35 ft 25 ft 45 ft 35 ft 25 ft Upper Upper 11.9 ft 11.5 ft 11.9 ft 11.5 ft Patuxent Patuxent Cattail Cr Cattail Cr Reservoir Reservoir Reservoir Reservoir Reservoir Reservoir Reservoir Reservoir Reservoir Reservoir PXT0977 ZTR0004 PXT0987 PXT1000 PXT1014 PXT0972 CTC0019 PXT0977 ZTR0004 PXT0987 PXT1000 PXT1014 PXT0972 CTC0019

Total Suspended Solids Biological Oxygen Demand

32 5

24 3.75

16 2.5 mg/liter mg/liter 8 1.25

0 0 R R Tria Tria Tria Tria Tria Tria Tria Tria Tria Tria 45 ft 35 ft 25 ft 45 ft 35 ft 25 ft Upper Upper 11.9 ft 11.5 ft 11.9 ft 11.5 ft Patuxent Patuxent Cattail Cr Cattail Cr Reservoir Reservoir Reservoir Reservoir Reservoir Reservoir Reservoir Reservoir Reservoir Reservoir PXT0977 ZTR0004 PXT0987 PXT1000 PXT1014 PXT0972 CTC0019 PXT0977 ZTR0004 PXT0987 PXT1000 PXT1014 PXT0972 CTC0019

0.1 0.05 0 06/21/2000 07/17/2000 08/14/2000 09/18/2000 10/14/1999 10/27/1999 11/17/1999 TriaReservoir 45 ft Tria Reservoir 11.9 ft TriaReservoir 35 ft TriaReservoir 25 ft Tria Reservoir 11.5 ft Upper Patuxent R Cattail Cr PXT0977 ZTR0004 PXT0987 PXT1000 PXT1014 PXT0972 CTC0019

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 163 Document version: August 22, 2007 Brighton Dam Low Flow Conditions (June to November) Stations are presented from left to right from downstream to upstream

Dissolved Inorganic Nitrogen Dissloved Inorganic Phosphorus

6 0.02 4.5 0.015 3 0.01

mg/liter 1.5 mg/liter 0.005 0 0 R R Tria Tria Tria Tria Tria 45 ft 35 ft 25 ft Upper Tria Tria Tria Tria Tria 45 ft 35 ft 25 ft 11.9 ft 11.5 ft Upper 11.9 ft 11.5 ft Patuxent Cattail Cr Patuxent Reservoir Reservoir Reservoir Reservoir Reservoir Cattail Cr Reservoir Reservoir Reservoir Reservoir Reservoir PXT0977 ZTR0004 PXT0987 PXT1000 PXT1014 PXT0972 CTC0019 PXT0977 ZTR0004 PXT0987 PXT1000 PXT1014 PXT0972 CTC0019

Total Nitrogen Total Phosphorus

6 0.08

4.5 0.06

3 0.04 mg/liter mg/liter 1.5 0.02

0 0 R R Tria Tria Tria Tria Tria 45 ft 35 ft 25 ft Upper Tria Tria Tria Tria Tria 45 ft 35 ft 25 ft 11.9 ft 11.5 ft Upper 11.9 ft 11.5 ft Patuxent Cattail Cr Patuxent Reservoir Reservoir Reservoir Reservoir Reservoir Cattail Cr Reservoir Reservoir Reservoir Reservoir Reservoir PXT0977 ZTR0004 PXT0987 PXT1000 PXT1014 PXT0972 CTC0019 PXT0977 ZTR0004 PXT0987 PXT1000 PXT1014 PXT0972 CTC0019

0.1 0.05 0 06/21/2000 07/17/2000 08/14/2000 09/18/2000 10/14/1999 10/27/1999 11/17/1999 TriaReservoir 45 ft Tria Reservoir 11.9 ft TriaReservoir 35 ft TriaReservoir 25 ft Tria Reservoir 11.5 ft Upper Patuxent R Cattail Cr

PXT0977 ZTR0004 PXT0987 PXT1000 PXT1014 PXT0972 CTC0019

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 164 Document version: August 22, 2007 BRIGHTON DAM STATION LIST

Station Station Lat/Long Description Code Names TRIADELPHIA RESERVOIR PXT0977 Tri Reservoir 39 11.826 45 ft. 45 ft. 77 00.663 ZTR0004 Tri Reservoir 39 12.839 11.9 ft. 11.9 ft. 77 00.485 PXT0987 Tri Reservoir 39 12.522 35 ft. 35 ft. 77 00.942 PXT1000 Tri Reservoir 39 13.210 25 ft. 25 ft. 77 01.904 PXT1014 Tri Reservoir 39 14.174 11.5 ft. 11.5 ft. 77 02.619 UPPER PATUXENT RIVER PXT0972 Upper 39 14.291 MD 97/Georgia Avenue crossing. Patuxent 77 03.363 River CATTAIL CREEK CTC0019 Cattail Creek 39 15.360 MD 97 bridge crossing. USGS Gage downstream side of 77 03.067 bridge.

2000 Data Report Gunpowder, Patapsco Patuxent, West Chesapeake 165 Document version: August 22, 2007