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Published byHunter Forbes Modified over 11 years ago
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Grande Ronde River Restoration Project - La Grande, OR Union Soil and Water Conservation District, Union County, City of La Grande and U.S. Army Corps of Engineers 1 1
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Project Vicinity Map 2 2
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The Problems 3 3
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Headcut 4 4
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The Problems Fish Passage 5 5
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The Problems Lack of Quality Pool Habitat 6 6
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The Problems High Sediment Input 7 7
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The Problems Lack of Large Woody Debris 8 8
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The Problems Lack of Riparian Vegetation 9 9
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Project Goals 10
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Project Goals Headcut Stabilization Stabilize Irrigation Diversion Facility Stabilize Channel Morphology Improve Fish Passage Prevent Stream Bank Erosion Vegetate Riparian Zone 11
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Project Description 12
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Project Description Cooperate with landowners to vegetate riparian zones, improving diversity and function, providing shade and preventing stream bank erosion. 13
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Project Description Replace the pushup irrigation diversion and stabilize the headcut structure to improve adult and juvenile salmon, steelhead and bull trout passage. 14
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Project Description Place root wads, anchored logs, J-hooks and W-weirs to provide safe migration corridors by reducing channel gradient, prevent channel migration, and provide stream bank erosion protection thereby reducing sedimentation. 15
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Project Description Educate landowners on management practices that will enhance riparian zones. 16
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Project Description Pursue Phase II - Next mile downstream to the Island City Bridge 17
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Plate 1 18
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Plate 2 19
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Plate 3 20
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Plate 4 21
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Future Without Project Headcut Could Break Free Resulting in the Following: 22
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Future Without Project Severe Headward Channel Downcutting Loss of Channel Complexity Continued Riparian Habitat Degradation Loss of Spruce Street Bridge Massive Sediment Movement and Entrapment (gravel bars) 23
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Funding 24
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Funding Feasibility Study, Environmantal Assessment and Specifications (up to August 2001) $250,000 Phase I Construction $3,264,320 U.S. Army Corps of Engineers share -$2,448,240 BPA Request (25% of total) $816,080 25
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