FLOOD06399

• County: Jefferson
• Community: Buffalo Creek
• Basin: South Platte
• Title: Stream Channel Stabilization Techniques for the Buffalo Creek Reclamation Project
• Date: 8/20/1996
• Prepared For: USFWS
• Prepared By: Woodward-Clyde
• Floodplain - Doc Type: Flood Mitigation/Flood Warning/Watershed Restoration

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EROSION ~

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. Cullo~gitudinal channel anchor slotS 4"
deep lIDd 4" wide aloag each side of the
insmnation to bury edges of matting,
whenever possible extend mining 2" - 3"
aboveithe crest of ch1lDllel side slopes.

. Begmbg at the downstream end and in the
cente~ of the chaDDel, place lI1e initial end
of the !msl roll in the anchor trench and
secure wilh fastening devices all'
intervili. Note: matting will initially be
upside dO\Vl1 in anchor trench.

f_ I . . d' lis'
. oW same m1lDller, posttion a ~acent ro m
anchot trench, overlapping lhe preceding
roUIl Jninimum of 3".
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. secuJ these initial ends of m81S with
ancbots at I ' intervals, bacldiIl and
comp&ct soil.
!
,
. Unroll center strip of mat1iag upstream.
Stop at next check slot or terminal anchor
trenc1l.
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. UmolJ. adjacent malS Upslream in similar
fashion, maintaining 3" overlap.
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. Fold and secure an rolls of matting
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snugly into an ttansver.;e check
slotS. lay mat in the bollom of lhe
slot then fold back against ilSelf.
Anchor through both layers of mat
at I' intervals then backfill and
c:ompW: soil. Continue rolling an
mat widths upstream to the next
check slot or tenlIinal anchor
!rencll.
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. AJ,temate method for noncritical
jn_nations: place two rows of anchors on
6" centers at 25' - 30' intervals in lieu of
excavared chec:k slots.
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. Shingle-lap spIic:ed ends by a minimum of l'
wilh uPstream mal on top 10 prevent

uplifting by water or begin new rolls in a
i:heck: slot. Anchor overlapped area by
p1acing rwo rows of anchors, l' apart on l'
intervals. '

.

Place edges of outside mats in previously
excavated longitudinal slots, anchor using
presc:ribed staple pinero, backfill and
compact soil.

. Anchor, fill and compact upstream end of .
mal in a 12" x 6" tenDinal trench.

.

Seaue mat to ground surlace using U-
shaped wiR staples geotexlile pins or
wooden stakes.

.

Seed and fillllllf reinforcement matting with
soil, if specifipd

Soil rolinI' if specified for lIIlf reinforcement.

. AfteT seeding, spread and lightly rake 1/2" -
3/4" of fille topsoil into the mat apertures to
completely fill mat thickness. Use backside
of rake or other flat implement.

. Spread topsoil using lightweight loader,
backhoe, or other power equipment. Avoid
slwp lIIms wilh equipment

. Do not drive IrackecI or heavy eqllipm..m
over mat.

.

Avoid any ttaffic over matting if loose or
wet soil conditions exist.

.

Use shovels. rakes or brooms for fine
grading and touch up.

. Smooth out soil filliIIg just exposing top
DCning of matrix.