DOCSLIB.ORG

Watershed Assessment

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Watershed Assessment DAWSON CREEK LIMITED WATERSHED ASSESSMENT Prepared for: DAWSON CREEK WATERSHED SOCIETY Box 14 Farmington, BC V0C 1N0 & CITY OF DAWSON CREEK PO Box 150, Dawson Creek, BC V1G 4G4 Prepared by: HEMMERA ENVIROCHEM INC. 250-1380 Burrard Street Vancouver, BC V6Z 2H3 File: 631-001.02 January 2006 Dawson Creek Watershed Society / City of Dawson Creek Hemmera Envirochem Inc. Dawson Creek Limited Watershed Assessment File: 631-001.02 Final Report - i - January 2006 EXECUTIVE SUMMARY This report documents the findings of the Dawson Creek Limited Watershed Assessment conducted by Hemmera Envirochem Inc, (“Hemmera”) on behalf of the Dawson Creek Watershed Society. The Dawson Creek Watershed is located near the City of Dawson Creek, in northeastern BC. The watershed supports a number of land uses and economic activities including: urban development, agriculture, oil and gas exploration, and recreation and tourism activities. Human development activities in the watershed have altered Dawson Creek. The Dawson Creek drainage basin covers an area of 274 km2, has a mainstem length of 43.5 km and includes several tributaries (Ski Hill Creek, South Dawson Creek, Frondizi Creek, plus many un- named tributaries). The watershed drains from west to east, through the City of Dawson Creek and empties into the Pouce Coupe River. The purpose of the watershed assessment is to develop an understanding of the baseline watershed conditions. It is intended that this information will be used to assist the Dawson Creek Watershed Society in developing strategies for restoring and managing the watershed. The assessment methodology involved research of existing baseline information; compilation of baseline information onto GIS maps; discussion of baseline conditions and identification of preliminary issues and recommendations. Based on the limited watershed assessment, the following key issues were identified: • Barrier to fish passage at Snake Pit Road (Rolla Road) Crossing; • Water quality concerns (i.e., coliform bacteria, water temperature and dissolved oxygen), and potential leachate issues near the “old” Dawson Creek Landfill; • Low water flow potentially linked to water licenses within the watershed; and, • Requirement for further studies to confirm fish presence/absence upstream of the Rolla Road crossing. The findings of the Limited Watershed Assessment (LWA) may be used in a number of ways to address land and water use issues that may potentially challenge ecosystem functions within the Dawson Creek Watershed Society / City of Dawson Creek Hemmera Envirochem Inc. Dawson Creek Limited Watershed Assessment File: 631-001.02 Final Report - ii - January 2006 Dawson Creek Watershed. The following are some of the ways that the findings from the LWA could be used. • Develop “Issue Specific” Action Plans – The results of the LWA are not confirmed or supported by field studies. As such, an appropriate use of the findings of the LWA would be to undertake field level studies to confirm one or more of the key issues identified above and collect information to support a better problem definition of such issues. This information would support the development of issue specific action plans. • Develop a Watershed Management Plan – The findings of the report could be used as a foundation document that supports a process to develop a watershed management plan (WMP). Such a plan, would likely be developed in collaboration with key stakeholders with an interest in the health of the watershed and would include long term goals and objectives for protection and enhancement of the watershed. The WMP would support, guide and prioritize issue specific action plans discussed above. The advantage of focusing on issue specific action plans is that it allows for immediate action on a fairly well defined set of issues and potentially provides for some early successes for the group. Having some early success is important in building support for longer term watershed planning and management activities. In addition, the collaboration required between stakeholders in advancing issue specific action plans can help to build working relationships necessary for developing a WMP and the structure necessary for its long term implementation. The disadvantage of this approach, is that the issue specific action plans would not be guided by a long term vision for the watershed. At the same time, it is possible to initiate the development of a WMP after the development of issue specific action plans and there are advantage to doing so as outlined above. Regardless of what approach is decided upon, it is essential that the decision-making process involve all stakeholders with an interest in the watershed. This will ensure that decisions made, regarding next steps are supported by stakeholders with an interest in the long-term health of the watershed. Dawson Creek Watershed Society / City of Dawson Creek Hemmera Envirochem Inc. Dawson Creek Limited Watershed Assessment File: 631-001.02 Final Report - iii - January 2006 As such, the recommended next steps are to organize stakeholder consultation meetings to decide how the findings of the LWA are best applied in the short term, establish an appropriate scope of work for 2006 and discuss potential funding sources to support the 2006 workplan. Dawson Creek Watershed Society / City of Dawson Creek Hemmera Envirochem Inc. Dawson Creek Limited Watershed Assessment File: 631-001.02 Final Report - iv - January 2006 TABLE OF CONTENTS 1.0 INTRODUCTION............................................................................................................. 1 1.1 PURPOSE .................................................................................................................. 1 1.2 LIMITED WATERSHED ASSESSMENT PROCEDURE .................................................... 2 1.2.1 Information Collection................................................................................ 2 1.2.2 Mapping ...................................................................................................... 2 1.2.3 Reporting..................................................................................................... 4 2.0 INFORMATION SOURCES........................................................................................... 5 3.0 EXISTING ENVIRONMENTAL CONDITIONS......................................................... 7 3.1 PHYSICAL SETTING .................................................................................................. 7 3.1.1 Dawson Creek Main Watershed ................................................................. 8 3.1.2 Dawson Creek South Watershed ................................................................ 9 3.1.3 Ski Hill Creek Watershed ......................................................................... 10 3.2 CHANNEL CHARACTERISTICS................................................................................. 10 3.2.1 Channel Morphology ................................................................................ 10 3.2.2 Sediment Source Survey........................................................................... 11 3.3 CLIMATE................................................................................................................ 11 3.4 HYDROLOGY.......................................................................................................... 12 3.5 LAND USE AND RESOURCE USE............................................................................. 13 3.5.1 Dawson Creek Main Watershed ............................................................... 13 3.5.2 Dawson Creek South Watershed .............................................................. 14 3.5.3 Ski Hill Creek Watershed ......................................................................... 15 3.6 BIOLOGICAL RESOURCES ....................................................................................... 16 3.6.1 Fish Presence ............................................................................................ 16 3.6.2 Vegetation................................................................................................. 18 3.6.3 Water Quality............................................................................................ 18 3.6.3.1 1999 Dawson Creek Water Quality Program............................... 18 3.6.3.2 Dawson Creek Landfill Groundwater Monitoring ....................... 21 3.6.3.3 City of Dawson Creek Water Quality Monitoring Program......... 22 4.0 PRELIMINARY ISSUES AND RECOMMENDATIONS ......................................... 23 Dawson Creek Watershed Society / City of Dawson Creek Hemmera Envirochem Inc. Dawson Creek Limited Watershed Assessment File: 631-001.02 Final Report - v - January 2006 5.0 NEXT STEPS .................................................................................................................. 28 5.1 DEVELOPING ISSUE SPECIFIC ACTION PLANS .......................................................... 28 5.2 DEVELOPING A WATERSHED MANAGEMENT PLAN................................................ 29 5.2.1 Definition .................................................................................................. 29 5.2.2 Content...................................................................................................... 30 5.2.3 Process ...................................................................................................... 30 6.0 CONCLUSION ..............................................................................................................
Load more

Recommended publications
  • BC OGC Water Use in Oil and Gas Activities 2012
    Water Use in Oil and Gas Activities Quarterly Updates on Short-Term Water Approvals and Use Q2 (April-June 2012) / Q3 (July-September 2012) About Us More Information BC Oil and Gas Commission Contact www.bcogc.ca Table of Contents The BC Oil and Gas Commission (Commission) is The short-term water approvals and usage data is the single-window regulatory agency with responsibilities updated quarterly with new information and statistics. A About the BC Oil and Gas Commission 2 for regulating oil and gas activities in British Columbia, current copy is available on the Commission website at More Information and Contact 2 including exploration, development, pipeline www.bcogc.ca, along with: transportation and reclamation. • Oil and Gas Activities Act and Water Act Update on Short-Term Water Approvals and Use 3 • Short-term Use of Water Application Manual The Commission’s core services include reviewing and • Data files of all Active Section 8 Approvals Water Used in Oil and Gas Activities 3 assessing applications for industry activity, consulting • 2011 Annual Water Report and Quarterly with First Nations, cooperating with partner agencies, Updates (Jan-Mar, Apr-Jun, Jul-Sep) Total Approvals and Reported Use 4 and ensuring industry complies with provincial legislation • 2012 Quarterly Updates Table 2 – Q2 Section 8 Data 6 and all regulatory requirements. The public interest • Northeast Water Tool is protected by ensuring public safety, respecting Table 3 – Q3 Section 8 Data 10 those affected by oil and gas activities, conserving the environment, and ensuring equitable participation in For specific questions or enquiries regarding this data, Appendix A – Water Source Well Production 14 production.
    [Show full text]
  • Evaluation of Techniques for Flood Quantile Estimation in Canada
    Evaluation of Techniques for Flood Quantile Estimation in Canada by Shabnam Mostofi Zadeh A thesis presented to the University of Waterloo in fulfillment of the thesis requirement for the degree of Doctor of Philosophy in Civil Engineering Waterloo, Ontario, Canada, 2019 ©Shabnam Mostofi Zadeh 2019 Examining Committee Membership The following are the members who served on the Examining Committee for this thesis. The decision of the Examining Committee is by majority vote. External Examiner Veronica Webster Associate Professor Supervisor Donald H. Burn Professor Internal Member William K. Annable Associate Professor Internal Member Liping Fu Professor Internal-External Member Kumaraswamy Ponnambalam Professor ii Author’s Declaration This thesis consists of material all of which I authored or co-authored: see Statement of Contributions included in the thesis. This is a true copy of the thesis, including any required final revisions, as accepted by my examiners. I understand that my thesis may be made electronically available to the public. iii Statement of Contributions Chapter 2 was produced by Shabnam Mostofi Zadeh in collaboration with Donald Burn. Shabnam Mostofi Zadeh conceived of the presented idea, developed the models, carried out the experiments, and performed the computations under the supervision of Donald Burn. Donald Burn contributed to the interpretation of the results and provided input on the written manuscript. Chapter 3 was completed in collaboration with Martin Durocher, Postdoctoral Fellow of the Department of Civil and Environmental Engineering, University of Waterloo, Donald Burn of the Department of Civil and Environmental Engineering, University of Waterloo, and Fahim Ashkar, of University of Moncton. The original ideas in this work were jointly conceived by the group.
    [Show full text]
  • Water Quality in British Columbia
    WATER and AIR MONITORING and REPORTING SECTION WATER, AIR and CLIMATE CHANGE BRANCH MINISTRY OF ENVIRONMENT Water Quality in British Columbia _______________ Objectives Attainment in 2004 Prepared by: Burke Phippen BWP Consulting Inc. November 2005 WATER QUALITY IN B.C. – OBJECTIVES ATTAINMENT IN 2004 Canadian Cataloguing in Publication Data Main entry under title: Water quality in British Columbia : Objectives attainment in ... -- 2004 -- Annual. Continues: The Attainment of ambient water quality objectives. ISNN 1194-515X ISNN 1195-6550 = Water quality in British Columbia 1. Water quality - Standards - British Columbia - Periodicals. I. B.C. Environment. Water Management Branch. TD227.B7W37 363.73’942’0218711 C93-092392-8 ii WATER, AIR AND CLIMATE CHANGE BRANCH – MINISTRY OF ENVIRONMENT WATER QUALITY IN B.C. – OBJECTIVES ATTAINMENT IN 2004 TABLE OF CONTENTS TABLE OF CONTENTS......................................................................................................... III LIST OF TABLES .................................................................................................................. VI LIST OF FIGURES................................................................................................................ VII SUMMARY ........................................................................................................................... 1 ACKNOWLEDGEMENTS....................................................................................................... 2 INTRODUCTION..................................................................................................................
    [Show full text]
  • Ambient Water Quality Objectives for the Pouce Coupe River
    Water Quality Ambient Water Quality Objectives For The Pouce Coupe River Overview Report Water Quality Section Water Management Branch Ministry Of Environment Prepared Pursuant To Section 2(E) Of The Environment Management Act, 1981 Original Signed By Ben Marr Deputy Minister February 9, 1985. Canadian Cataloguing in Publication Butcher, G. A. (George Alan), 1952- Peace River area, Pouce Coupe River sub-basin, water quality assessment and objectives [Vol. 2] constitutes technical appendix. ISBN 0-7726-1737-6 1. Water quality - Pouce Coupe River Watershed (BC and Alta). I. British Columbia Environment. Water Management Division. II. Title. TD227.B7B874 1993 363.73'942'0971187 C93-092109-7 Ministry of Environment Water Protection and Sustainability Branch Mailing Address: Telephone: 250 387-9481 & Climate Change Environmental Sustainability PO Box 9362 Facsimile: 250 356-1202 Strategy and Strategic Policy Division Stn Prov Govt Website: www.gov.bc.ca/water Victoria BC V8W 9M2 FIGURE 1. Pouce Coupe River Sub-basin Map PREFACE Purpose of Water Quality Objectives Water quality objectives are prepared for specific bodies of fresh, estuarine and coastal marine surface waters of British Columbia as part of the Ministry of Environment, Lands and Parks' mandate to manage water quality. Objectives are prepared only for those waterbodies and water quality characteristics that may be affected by human activity now or in the near future. How Objectives Are Determined Water quality objectives are based the BC approved and working criteria as well as national water quality guidelines. Water quality criteria and guidelines are safe limits of the physical, chemical, or biological characteristics of water, biota (plant and animal life) or sediment which protect water use.
    [Show full text]
  • Prepared For: Dawson Creek Ministry of Forests
    9 10 11 12 7 8 ek re katoo n C Sas TWP. 79, RGE. 15 W6M M TWP. 79, RGE. 14 W6M c Q 4 6 5 3 2 1 u e e n C r e e k S S E E D23 E E F F I I ! ! G G U U R R E E WC7 2 2 G E 31 32 33 34 35 36 McQueen Slough TWP. 78, RGE. 15 W6M TWP. 78, RGE. 14 W6M 25 30 29 28 27 26 B r i RGE. 16 RGE. 15 RGE. 14 t RGE. 13 RGE. 12 W6M RGE. 18 W6M RGE. 17 i SCALE: 1:20,000 s FIGURE 2F Alberta h m C TWP. 80 o l 0 200 400 600 u m b (All Locations Approximate) i NOVA GAS TRANSMISSION LIMITED a GROUNDBIRCH PIPELINE PROJECT April 2009 5745 TWP. 79 ! Watercourse Crossing DATA SOURCES: Imagery: SPOT 5 Satellite Imagery © 2009 CNES, Licensed by Iunctus Geomatics Corp., Lethbridge, Alberta, Canada; TWP. 78 Watercourse Crossing, Drainage: TERA Environmental Consultants 2008; ! Drainage Pipeline Routing: March 13, 2009 (Provided by Midwest Survey). Although there is no reason to believe that there are any errors associated with the data used to generate TWP. 77 Proposed Pipeline this product or in the product itself, users of these data are advised that errors in the data may be present. 19 20 5745_ESA_Fig2F_Waterxing_Rev0.mxd 12 7 9 10 11 r e v i TWP. 79, RGE. 13 W6M TWP. 79, RGE. 14 W6M R e u p e Co Pouc 6 2 1 4 3 S E E F D24 I G ! U R E 2 F D25 D26 ! ! ! 31 35 36 32 33 34 WC8 S E E F I G U TWP.
    [Show full text]
  • Canada Gazette, Part I
    Vol. 134, No. 45 Vol. 134, no 45 Canada Gazette Gazette du Canada Part I Partie I OTTAWA, SATURDAY, NOVEMBER 4, 2000 OTTAWA, LE SAMEDI 4 NOVEMBRE 2000 NOTICE TO READERS AVIS AU LECTEUR The Canada Gazette is published under authority of the La Gazette du Canada est publiée conformément aux Statutory Instruments Act. It consists of three parts as described dispositions de la Loi sur les textes réglementaires. Elle est below: composée des trois parties suivantes : Part I Material required by federal statute or regulation to Partie I Textes devant être publiésdanslaGazette du be published in the Canada Gazette other than items Canada conformément aux exigences d’une loi identified for Parts II and III below — Published fédérale ou d’un règlement fédéral et qui ne satisfont every Saturday pas aux critères des Parties II et III — Publiée le samedi Part II Statutory Instruments (Regulations) and other classes Partie II Textes réglementaires (Règlements) et autres catégories of statutory instruments and documents — Published de textes réglementaires et de documents — Publiée le January 5, 2000, and at least every second 5 janvier 2000 et au moins tous les deux mercredis par Wednesday thereafter la suite Part III Public Acts of Parliament and their enactment Partie III Lois d’intérêt public du Parlement et les proclamations proclamations — Published as soon as is reasonably énonçant leur entrée en vigueur — Publiée aussitôt que practicable after Royal Assent possible après la sanction royale The Canada Gazette is available in most public libraries for On peut consulter la Gazette du Canada dans la plupart des consultation.
    [Show full text]
  • Annual Unit Runoff in Canada
    Annual Unit Runoff in Canada Anna Cole January 2013 Table of Contents 1.0 Introduction .............................................................................................................. 1 2.0 Study Period ............................................................................................................. 2 3.0 Data .......................................................................................................................... 5 3.1. Hydrometric Gauging Stations ................................................................................ 5 3.2. Drainage Areas......................................................................................................... 6 4.0 Methodology ............................................................................................................ 7 4.1. Filling and Extending Records................................................................................. 7 4.2. Nested Drainage Basins ........................................................................................... 8 4.3. Frequency Analysis ................................................................................................ 10 4.4. Mapping ................................................................................................................. 10 5.0 Discussion .............................................................................................................. 12 6.0 Applications ..........................................................................................................
    [Show full text]
  • In the News Jul06
    July 2006 “Open for business” — business climate complemented The Dawson Creek Community Profile & Investment Guide and In the News are These are the signs which by a skilled labour force and produced by: welcome people to Dawson training opportunities make the Dawson Creek Catholic Social Services Creek. The pro-active City an ideal location for your 1209-105 Avenue leadership of Mayor Calvin Kruk business. Dawson Creek, BC V1G 2L8 and City Council working in The Peace, with Dawson Photo Credits: conjunction with the Chamber of Creek at the centre of it all, C. Anderson, New Harvest Media Commerce and the community, shows plenty of opportunities for D. Pettit, Peace Photographics E. Mayoh has shown proven growth in the growth in the production of a economic sector and balance in myriad of quality products at Cover Design: RG Strategies the quality of life for residents relatively low costs. “Branding and their families. The long-term the Peace” is an innovative The Dawson Creek Community Profile & Investment Guide and In the News are filled goal of the City is to be the project dedicated to developing with information and statistical data. Although business, service and and promoting a strategy that every effort was made in good faith to ensure the transportation centre for the encourages the marketing and accuracy of information contained herein, Dawson Creek Catholic Social Services accepts Peace Region. promotion of Alberta and British no warranty nor accepts liability from any Dawson Creek’s progressive Columbia Peace River products. incorrect, incomplete or misleading information or its improper use. For more information, leadership, comparatively low please contact The City of Dawson Creek at property costs and positive 250-784-3600.
    [Show full text]
  • Surface Water Quality Data Summary for Northeast British Columbia
    Northeast Water Strategy Surface Water Quality Data Summary for Northeast British Columbia British Columbia Ministry of Environment & Climate Change Strategy Water Protection and Sustainability Branch November 2018 EXECUTIVE SUMMARY The Surface Water Quality Data Summary for Northeast British Columbia (B.C.) began in 2016 as a project under the Northeast Water Strategy (NEWS) to inventory the available water quality data, up to January 2018, and identify gaps to inform future monitoring. This data summary fulfills the NEWS Action Area 1: Enhancing information to support decision- making. Once water quality knowledge gaps in Northeast B.C. are identified, we can begin to address them as part of the NEWS Action Area 4: Enhancing monitoring and reporting. Summarizing available water quality data is an essential first step in defining an effective water quality monitoring program. In order to make informed decisions, it is important to first determine what data are available and what additional data are required to answer a given question. This report inventoried available data from the B.C. Ministry of Environment and Climate Change Strategy (ENV) Environmental Monitoring System (EMS) Database and the Environment and Climate Change Canada (ECCC) Canadian Aquatic Biomonitoring Network (CABIN) open government portal. This report compliments a previous NEWS project, the Disturbance-Sensitivity Based Approach, which established the 69 watershed boundaries used in this report and ranked the watersheds in order of water monitoring priority. This report is divided into two parts: Part 1 is an overall data summary including a map of all 69 watersheds and a table summarizing the corresponding water quality data; Part II provides more detail on the water quality data available for each watershed, including waterbody and type of parameters measured.
    [Show full text]
  • Water Quality in British Columbia Objectives Attainment In
    WATER QUALITY SECTION WATER MANAGEMENT BRANCH MINISTRY OF ENVIRONMENT, LANDS AND PARKS Water Quality in British Columbia _______________ Objectives Attainment in 1996 and 1997 August, 1999 Canadian Cataloguing in Publication Data Main entry under title: Water quality in British Columbia : Objectives attainment in ... -- 1996 and 1997 -- Annual. Continues: The Attainment of ambient water quality objectives. ISNN 1194-515X ISNN 1195-6550 = Water quality in British Columbia 1. Water quality - Standards - British Columbia - Periodicals. I. BC Environment. Water Management Branch. TD227.B7W37 363.73’942’0218711 C93-092392-8 WATER QUALITY IN B.C. - OBJECTIVES ATTAINMENT IN 1996 AND 1997 iii SUMMARY The setting of water quality objectives in priority basins in British Columbia began in 1982. By the end of 1997, the Ministry of Environment, Lands and Parks had set water quality objectives in 46 bodies of water, both fresh and marine, throughout the Province. Annual monitoring to check the attainment of objectives started in 1987. This report presents the results of monitoring done in 1996 and 1997 to check the attainment of objectives in 15 basins (1996) and 14 basins (1997). Due to budgetary restraints, the program has been considerably as compared to previous years. The results are summarized in a series of tables. For all Ministry Regions the objectives were met 81 percent of the time in 1996 and 77 percent of the time in 1997. The findings in 1996 and 1997 are slightly less than the 1995 figure (83%), and also less than previous years when attainment ranged from 94 percent in 1987 to 83 percent in 1995.
    [Show full text]
  • Technical Data Report Hydrology
    Technical Data Report Hydrology ENBRIDGE NORTHERN GATEWAY PROJECT AMEC Earth & Environmental A division of AMEC Americas Limited Calgary, Alberta Monica Wagner, M.Eng., P.Eng. 2010 Hydrology Technical Data Report Table of Contents Table of Contents 1 Introduction ...................................................................................................... 1-1 1.1 Objectives ........................................................................................................... 1-1 1.2 Setting ................................................................................................................ 1-1 2 Methods ........................................................................................................... 2-1 2.1 Study Area Boundaries ....................................................................................... 2-1 2.1.1 Hydrological Zones ........................................................................................ 2-1 2.1.2 Watercourse Crossings ................................................................................. 2-1 2.1.3 Study Area for Existing Data Review ............................................................. 2-1 2.1.4 Study Area for Field Surveys ......................................................................... 2-4 2.2 Review of Existing Data Sources ........................................................................ 2-5 2.2.1 Streamflow Data ............................................................................................ 2-5 2.2.2 Climate
    [Show full text]
  • Environmental Indicator: Surface Water Quality in British Columbia
    BRITISH COLUMBIA MINISTRY OF WATER, LAND AND AIR PROTECTION - 2002 Environmental Indicator: Surface Water Quality in British Columbia Primary Indicator: Trends in water quality in British Columbia. Selection and Use of Indicator: Trends in water quality for selected waterbodies, over time, is a state or condition indicator. The quality of water is a major concern because of the impact it has on the suitability of water sources for human and natural uses. This indicator shows the direction of departure (if any) of water quality from an acceptable threshold for each waterbody. The environmental significance of each trend is assessed in relation to water quality objectives for each waterbody or to province-wide water quality guidelines. Data Sources: Environment Canada and the Ministry of Water, Land and Air Protection have been collecting technical data on surface water quality for many years through the Canada - BC Water Quality Monitoring Agreement. Data are from a network of water sampling stations throughout the province. (Note: these are not the same monitoring stations used for the Water Quality Index described in the following secondary indicator). The following Tables 1-3 presents the waterbody sampling stations shown on the map on pg. 16 of Environmental Trends in British Columbia 2002. Table 1. Monitoring Stations Showing Improving Water Quality Location of monitoring station Water Quality Cause of Water Use at Risk Action (Years) Indicators Trend Fraser River at Hope (1979-97) AOX Waste Aquatic life and human Monitoring Chloride abatement at and wildlife consumption continues. pulp mills. of aquatic life. Salmon River at Salmon Arm Fecal coliforms Agricultural Recreation, irrigation and Continued (1985-97) non-point livestock watering.
    [Show full text]