Peshastin Creek Fish Barrier Removal
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Chelan County of; Peshastin Creek Fish Barrier Removal (#04-1509)
06/01/2004, Attachment #10280, Peshastin Dam 2
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This project would build a fish passage structure at the Peshastin Irrigation District diversion structure on lower Peshastin Creek. The structure will allow access to spawning and rearing habitat for steelhead, bull trout and spring Chinook. The project would locate a roughened channel fishway at a channel slope of 3.9% upstream from the dam axis on the left abutment. Project also includes installation of fish screen at head gates. The dam would be notched for a 16ft width. From that notch the roughened channel fishway would extend upstream for approximately 87 feet. The fishway would have two training walls for the entire length. The walls would extend to elevation 1180 (same as the left abutment elevation) and be constructed of steel plate sections with rock support. The channel would be trapezoidal in cross section with 2:1 side slopes and 3ft bottom width. Boulders would be placed in the fishway invert to create a meandering flow pattern and provide shelter for fish. Two boulder weirs would be placed immediately downstream from the fishway exit to backwater flashboard weirs at the channel's upstream exit. These weirs are required to meet hydraulic drop criteria of 6 inches. The upstream exit would be controlled by 8 flashboard bays. Incidental creek channel reshaping will be required to connect the fishway invert to the existing thalweg up and downstream. The existing dam notch would be closed when the fishway is in use.
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General Area:
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From the intersection of Highway 2 and Highway 97, head southbound on Highway 97. The project is located on the east side of the road approximately 4 miles.
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Waterbody:
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Peshastin Creek, Peshastin Irrigation District, Wenatchee River
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County:
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Chelan
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Legislative District:
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12
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Congressional District 2022:
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08
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Salmon Recovery Regions:
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Upper Columbia River
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Watershed Administrative Unit:
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Mt Stuart
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HUC8:
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Wenatchee (17020011)
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WRIA:
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Wenatchee
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Sections:
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29
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Township:
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T24NR18E
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Coordinates:
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47.54342751
-120.61283649
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| Worksite Name | Scope of Work | Actual Restoration Cost |
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Peshastin Creek Fish Barrier Removal (#1)
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Architectural & Engineering (A&E), Fish passage blockages removed or altered (C.2.c.1), Fishway chutes or pools installed (C.2.d.1)
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$237,950
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| | Total | $237,950 |
Amounts may not be complete
| Worksite Name | | Property Name | Landowner Type |
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Peshastin Creek Fish Barrier Removal (#1)
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Property 1 - Property - Worksite #1
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Private
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| | | | Total |
Amounts may not be complete
| | Category / Work Type / Metric | Final |
Restoration Metrics (rolled up from Worksite level) |
Fish Passage Improvement |
| Fish passage blockages removed or altered (C.2.c.1) |
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Number of Blockages/Impediments/Barriers Removed/Altered (C.2.c.2)
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1
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| Fishway chutes or pools installed (C.2.d.1) |
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Number Of Fishway Chutes/Pools Installed (C.2.d.2)
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1
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Number of blockages / impediments / barriers impeding passage (C.2.b.4)
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1
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| Milestone Name | Target Date | Description |
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Project Start
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02/01/2005
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Applied for Permits
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02/01/2005
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Construction Started
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08/01/2005
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Construction Complete
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12/31/2005
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Agreement End Date
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10/31/2006
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WDFW is requiring a small amount of remedial work yet
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Final Docs/Billing to Mgmt Agy
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12/31/2006
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