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Implement Actions to Reduce Water Temperatures in the Teanaway Basin BPA FY 2002 Columbia Plateau Province Proposal Project ID # 25021.

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Presentation on theme: "Implement Actions to Reduce Water Temperatures in the Teanaway Basin BPA FY 2002 Columbia Plateau Province Proposal Project ID # 25021."— Presentation transcript:

1 Implement Actions to Reduce Water Temperatures in the Teanaway Basin BPA FY 2002 Columbia Plateau Province Proposal Project ID # 25021

2 Introduction n The Teanaway River has a history of elevated stream temperatures n This project will mitigate some of the causes of high water temperatures

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5 Maximum, Mean and Hourly Water Temperatures for the North Fork Teanaway River (7/1/ /7/98)

6 Elevated Water Temperatures are Harmful to Salmonids n Decreased oxygen supply n Disrupted metabolism n Increased susceptibility to toxins n Increased vulnerability to disease n Reduced ability to avoid predators n Reduced food supply

7 Threatened Teanaway Salmonids n In 1999, certain Teanaway salmonids were listed as threatened under the Endangered Species Act: –Bull Trout –Steelhead

8 How Can We Reduce Teanaway Water Temperatures? 1) Restore riparian vegetation -- increase shade and stabilize banks 2) Increase instream flows -- greater water volume stays cooler 3) Reduce sediment inputs -- restore more natural width/depth ratios, deeper water stays cooler

9 Objective 1: Increase irrigation efficiency n Task A: Move points of diversion on two properties in lower Teanaway Basin n Task B: Upgrade irrigation equipment from rill to sprinkler n Benefits: –Save ~2.25 cfs of instream water –Reduce ag. runoff from rill irrigation n Cost: $130,300 - FY 02, $18,000 - FY 03

10 Objective 2: Stabilize streambanks n Task A: Install rock barbs at three sites in lower Teanaway River n Benefits: –Reduce sediment input to river, restore width/depth ratio –Prevent annual loss of ~400 cubic yards of bank material per site n Cost: $12,000 - FY 02, $118,525 - FY 03/04

11 Objective 3: Restore riparian vegetation n Task A: Plant native trees in riparian areas n Benefits: –Increase stream side shading –Increase bank stability n Cost: $15,700 - FY 02

12 Objective 4: Upgrade Stafford Creek Road n Task A: Upgrade stream crossings n Task B: Repair portions of road, narrow road to widen riparian buffer n Benefits: –Reduce sediment input to river, restoring width/depth ratio –Wider riparian buffer –Wider riparian buffer increases shading n Cost: $96,500 - FY 02

13 Objective 5: Replace culvert at Jack Creek n Task A: Replace inadequate culvert (currently eroding and perched ) n Benefits: –Reduce sediment input to river, restoring width/depth ratio –Removal of fish passage barrier will allow use of Jack Creek habitat by smolts from adjacent acclimation facility n Cost: $15,000 - FY 02, $84,000 - FY 03

14 Objective 6: Monitor project effectiveness n Tasks A-D: Monitor effectiveness of irrigation improvements, bank stabilization, tree planting and road improvements/culvert replacements. n Benefits: –Findings will direct modifications in project activities to make best use of funding –Findings will help plan future activities n Cost: $7,000 - FY 02, $12,000 - FY 03/04

15 Objective 7: Additional monitoring n Task A: Collect water temperature and sediment data in Teanaway Basin n Task B: Determine sediment loading and identify primary sediment sources n Benefits: –Provide baseline data for future studies –Identify additional causes of temperature impairment, so they can be corrected n Cost: $61,500 - FY 02, $81,500 - FY 03/04

16 Our Subcontractors are Our Local Partners n Subcontractors are: –Kittitas County Conservation District –Natural Resources Conservation Service –Kittitas County –US Forest Service (Cle Elum RD) n All subcontractors are members of the Teanaway Temperature TMDL workgroup

17 In Closing... n The Teanaway River has high summer water temperatures, harmful to salmonids n High water temperatures can be corrected by –More riparian vegetation –Increased bank stability –Reduced sediment input n This project uses the above methods to reduce water temperatures


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