Upper Smith River Collaborative Fish Passage S-3
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Culvert Inlet |
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Culvert Outlet |
Views of the
Old Culvert
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Culvert Inlet Severe signs of erosion around inlet leading to potential fill failure. |
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Culvert Outlet Severe erosion around outlet, rusted out culvert bottom, and 8” outlet drop (juvenile fish impediment). |
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Culvert Outlet Looking upstream through pipe |
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How
bad was this culvert before?
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The
bottom of the culvert was rusted. |
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Severe
erosion and fill failure around the culvert inlet and outlet. |
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Culvert
had become de-coupled in the middle leading to road subgrade failure
and compromising of the fill material. |
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Outlet drop of 8” which created an impediment to juvenile fish passage. |
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Poor culvert/stream alignment. |
New culvert design and installation
specifications
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Sized
to the Oregon Forest Practice rules (50-year flood event) - 112” x 75”
x 75’ squash pipe. |
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Counter
sunk allowing material to fill the bottom of the culvert creating natural
stream conditions. |
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Geotextile
and riprap used to armor the fill. |
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Road
surface rocked with a 9” lift of 3”-0 hard crushed rock. |
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All
exposed soils seeded, fertilized & mulched. |
Seneca
found many benefits in collaborative efforts
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Identifying and prioritizing restoration and rehabilitation, regardless of land ownership. |
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Combining resources such as expertise, funding dollars, and time for the achievement of a common goal/objective – Watershed Restoration. |
| Achievement of cost savings through the proper allocation of project resources and work assignment (Government supply resources such as rock and private industry supply the equipment, labor, and administration of the contract – No Davis Bacon Wages). |
| Realize cost savings through economies of scale – combining several projects into one contract. |
| We as landowners or land administrators are all working towards the same objective. By working together we can realize this goal in a much more efficient and timely manner! |
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