InStream Conservation

Diagrams and Conceptual Drawings for River Restoration

The following are example USDA Natural Resources Conservation Service schematic diagrams and conceptual drawings for river restoration –

Cross veins, J-hooks and root wads provide the following benefits:

  • River water tumbles over rock/wood veins adding oxygen and mixing with cooler water, providing fish-friendly habitat
  • Plunge pools provide cover, cool groundwater inflow and cover for large fish/fry
  • Vanes and J-hooks direct flow to the center of the channel, taking stress off banks, allowing for re-vegetation
  • Pool tail-outs provide quality salmon and steelhead spawning habitat
  • Porous rock/wood structures allow upstream sediment to move through reach, keeping spawning gravel clean
  • Provides low risk to boaters and recreational users
  • After construction monitoring assures project has met goals for tax, rate payers and fish

Managing flood prone areas for minimal structural damages or losses.

These designated boundaries are based on technical-hydraulic studies that determine flood elevations, cross sectional areas and fringes.

A.) Recurrence of flood is frequent. Damages to structures are inevitable. Cost of channel control is high. Build only at high risk.

B.) Recurrence of flood is still frequent enough to cause significant damage. Structures must be designed to be more resistant to flood damage. (NOT recommended to build here).

C.) Recurrence of flood frequency is high enough for concern. If building occurs however. alterations to structures should be incorporated.

D.) Floodway fringe, structures are not part of project flood limit. Potential to damage structures by flood are low to none.

Flood Prone Areas

More Diagrams

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800 Ft. Gray’s River Habitat Enhancement SW Washington

This complex project uses l strategically placed rock/wood log jamb. 2 rock W-vanes top & bottom. 2 rock cross vanes and 2 rock J-hook vanes that deflect flows away from the bank reducing bank erosion and creating fish habitat. Project was monitored the last 5 years with excellent ratings.

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Grays River Habitat Enhancement Diagram

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