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2014 Annual Report Prepared by Bernie Bonn For

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2014 Annual Report Prepared by Bernie Bonn For TUALATIN RIVER FLOW MANAGEMENT TECHNICAL COMMITTEE Scoggins Creek Fire — September 19, 2014 2014 Annual Report prepared by Bernie Bonn for Scoggins Creek Fire — 5 months later Cover photos taken by: John Goans, Tualatin Valley Irrigation District TUALATIN RIVER FLOW MANAGEMENT TECHNICAL COMMITTEE 2014 Annual Report Prepared by: Bernie Bonn For: Clean Water Services In cooperation with: Oregon Water Resources Department, District 18 Watermaster FLOW MANAGEMENT TECHNICAL COMMITTEE MEMBERS Kristel Fesler, Chair City of Hillsboro Water Department John Goans Tualatin Valley Irrigation District Jake Constans Oregon Water Resources Department Raj Kapur Clean Water Services Laura Porter Clean Water Services Scott Porter Washington County — Emergency Management System Mark Rosenkranz Lake Oswego Corporation Randy Smith City of Forest Grove Todd Winter Washington County Parks — Hagg Lake ACRONYMS USED IN THIS REPORT FULL NAME ACRONYM FULL NAME ACRONYM Facilities Units of Measurement Spring Hill Pumping Plant SHPP Acre-Feet ac-ft Wastewater Treatment Facility WWTF Cubic Feet per Second cfs Organization Micrograms per liter g/L Barney Reservoir Joint Ownership BRJOC Milligrams per Liter mg/L Commission Million Gallons per Day MGD Clean Water Services CWS Pounds lbs Joint Water Commission JWC River Mile RM Lake Oswego Corporation LOC Water Year WY Oregon Department of Environmental Quality ODEQ Water Quality Parameters Oregon Department of Fish and Wildlife ODFW Biochemical Oxygen Demand BOD Oregon Department of Forestry ODF Dissolved Oxygen DO Oregon Water Resources Department OWRD Sediment Oxygen Demand SOD National Marine Fisheries Service NMFS Other Tualatin Valley Irrigation District TVID Biological Opinion BiOp Tualatin Valley Water District TVWD Total Maximum Daily Load TMDL Bureau of Reclamation BOR Wasteload Allocation WLA U.S. Fish and Wildlife Service USFWS U.S. Geological Survey USGS Disclaimer This report and the data presented herein are provided without any warranty, explicit or implied. The data presented in this report were supplied by the members of the committee. Although every effort was made to faithfully reproduce the data as provided, the data are not warranted to be accurate, appropriate for interpretation, merchantable, or suitable for any particular purpose. TABLE OF CONTENTS 2014 Summary . 4 Background Basin Description and Tualatin River Basin Map . 5 Tualatin River Water Management . 8 Member Reports for 2014 Reservoir Status . 9 Clean Water Services . 10 Joint Water Commission/Joint Barney Commission . 15 Lake Oswego Corporation. 20 Oregon Water Resources Department . 23 Scoggins Dam/Henry Hagg Lake . 25 Tualatin Valley Irrigation District . 28 Water Quality. 30 Biological Opinions Released in 2014. 37 Scoggins Creek Fire. 40 Appendices A. Stream Gage Records—Data Tables and Hydrographs of Daily Data B. Selected Releases and Withdrawals—Data Tables and Hydrographs C. Scoggins Reservoir (Henry Hagg Lake) Operations—Monthly Data Reports D. Barney Reservoir Operations—Monthly Data Reports E. Municipal Water Use Allocations—Monthly Data F. Temperature Records—Data Tables and Graphs of Daily Data G. Hagg Lake—omitted from the 2014 Flow Report because no monitoring was done in 2014 H. Precipitation Records— I. River Mile Indices— 2014 Tualatin River Flow Management Report 3 2014 SUMMARY This is the twenty-sixth year that the Tualatin River Flow Management Technical Committee has prepared an annual report documenting the flow management of the Tualatin River. Members of the committee include Clean Water Services (CWS), Tualatin Valley Irrigation District (TVID), Joint Water Commission (JWC), Lake Oswego Corporation (LOC) and Oregon Water Resources Department (OWRD). Highlights for 2014 include: • Both Scoggins and Barney Reservoirs filled. • Two Biological Opinions were issued regarding the operation of the Bureau of Reclamation's facilities in the Tualatin River basin (collectively called the Tualatin Project). The National Marine Fisheries Service (NMFS) concluded that the Tualatin Project is not likely to adversely affect Chinook salmon or steelhead, which are federally listed as threatened species. The US Fish and Wildlife Service (USFWS) concluded that the Tualatin Project did not jeopardize the continued existence of Fender’s Blue butterfly (endangered) and Kincaid’s lupine (threatened). • A forest fire burned for 6 days in September in the Scoggins Creek area northwest of Hagg Lake. About 200 acres were burned; the damage is estimated at about $2 million. • Weather highlights: January through early-February were particularly dry, resulting in low stream flows during that time. Mid-February through mid-May were very wet, resulting in periods with high stream flows. Low temperatures were above average during June-September and set records at several locations. Otherwise, the summer weather was typical—dry and warm. • Wapato Lake management was normal for water year 2014, with the lake pumped out by late April. The spring rains somewhat delayed the date at which the lake was finally pumped out. • CWS continued its work to construct a natural treatment system at Forest Grove. The system is scheduled to be operational in 2017. Tualatin River at Farmington (RM 33.3 #14206500) 1989–2014 40000 2014 1996 10000 2001 Statistical Distribution 1989–2014 90th percentile 75th percentile 1000 median 25th percentile Daily Mean Discharge (cfs) Discharge Mean Daily 10th percentile 100 60 1/1 2/1 3/1 4/1 5/1 6/1 7/1 8/1 9/1 10/1 11/1 12/1 Date 12/31 4 2014 Tualatin River Flow Managment Report BACKGROUND Basin Description The Tualatin River Basin comprises an area of 712 square miles situated in the northwest corner of Oregon and is a subbasin of the Willamette River. The headwaters are in the Coast Range and flow in a generally easterly direction to the confluence with the Willamette River. The basin lies almost entirely in Washington County. (See map below) The Tualatin River is about 80 miles long and changes dramatically from its headwaters to its mouth. The mountain or headwater reach (upstream of RM 55) is narrow (about 15 ft) and steep with an average slope of about 74 ft/mi. The meander reach (RM 55–33) is wider with an average slope of about 1.3 ft/mi. The reser- voir reach (RM 33–3.4) is very wide (up to 150 ft) and has an estimated slope of only 0.08 ft/mi. It includes several deep pools. Travel times through this reach are very long. The slow movement of the water causes this reach to act much like a lake. In the riffle reach (RM 3.4–0), the Tualatin River flows through a short reservoir section and then drops into a narrow gorge near the City of West Linn before it enters the Willamette River just upstream of Willamette Falls. The average slope in this reach is 10 ft/mi. Tualatin River Basin 123°22'30'' 123°15' 123°00' 122°45' 122°37'30'' 26 WASHINGTON COLUMBIA 45°45' E a s W t e s t T U E A WASHINGTON G L C A F O N o r eek T k r MULTNOMAH L F C I U A Gales o N M r k B R IA R IV M W E R O I L C North U r Banks L ee Plains N A TILLAMOOK k T M E A T OREGON y I T a N E K S D c 5 a M T iry ek S re C k C re e A ek n S re so c C n k O o Cornelius Hillsboro ro e g B re g Forest C C RM k in c ill s Grove 50 o Bea R ve r M 26 Henry rt a on d 45°30' Hagg Dilley Ce R ternut Cr Creek Lake UALATIN IVER ut T B Beaverton RM R I RM C RM Creek 40 V 60 E 70 Cherry H F ense a R Grove E ris t n C Farmington n Ch ree n H k o C A k RM Tigard r ee e Lake Ba L r 30 ek si E rris C Oswego n Bu RM bou M Scholls nda Creek 20 RM ry o 10 g M M l cF e ee a O w n Cr s a U B Tualatin O C N a r YAMHILL k rg C n e T e Nyb 205 o r A t k C e I a re N r S e C H n Sherwood West e Linn Portland k ic Study C h RM area 0 OREGON CLACKAMAS N T 0 510 MILESI T A E T R N 0 5 10 KILOMETERS R U O PA 5 M 45°15' Base modified from U.S. Geological Survey 1:100,000 topographic quadrangles, 1978–84 Designated urban growth area from Metro, 1998 RM River mile 10 2014 Tualatin River Flow Management Report 5 Water sources to the Tualatin River Precipitation: Seasonal rainfall accounts for most of the natural flow in the Tualatin Basin; streamflow from snowmelt is minimal. The amount of rainfall ranges from 110 inches on the eastern slopes of the Coast Range to 37 inches in the southeastern area of the drainage basin. Peak months for rainfall are November through February while the driest months are normally June through October. The peak streamflow month is usually February and the lowest streamflow month is August. Barney Reservoir: Barney Reservoir is located behind Eldon Mills Dam on the Middle Fork of the North Fork of the Trask River (outside of the Tualatin Basin). A trans-basin aqueduct carries water over a low Coast Range divide to a pipeline that discharges into the Tualatin River at RM 78. Barney Reservoir has a capacity of 20,000 acre-feet and stores water for the Joint Water Commission (Cities of Hillsboro, Forest Grove and Beaverton, and the Tualatin Valley Water District) and Clean Water Services.
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