Sitkoh_RIVER_ATTACHMENT_C_LogComplex Detail.doc
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- Attached to
- Sitkoh River Stream Restoration Federal contract opportunity
- Solicitation number
- AG-0116-S-11-0084
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Attachment C
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ATTACHMENT C
USDA FOREST SERVICE
TONGASS N.F. CRAIG RD
STRUCTUE: FMF BI SECTION
DATE: 3/20053
DESIGNED BY: BRIAN BAIR
REVIEWED BY: BOB GUBERNICK
Bi-Section View
NOTES:
FMF Formidable Multi-faceted Log Complex
Maximum Scour Depth
Top of Bank / Flood Prone Terrace
Bankfull
Elevation
Direction of Flow
Stream Bed
Elevation
1) Excavate toe log trenches perpendicular to flow and into bank below bed surface at maximum predicted scour depth. 2) Excavate torsion Log trenches 15 &20% to flow and to bed surface elevation. Top of torsion log elevation should exceed 3-5 year discharge return interval elevation. 3) Place weave additional trees, logs, large boulders, slash or root-wads in apex of structure. 4) Place ample slash and small woody debris on the up-stream bank interface of the structure.
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