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Phase 2 of the
Tolmie Clay Slide Stabilization for 2004 will be completed with
ten more groynes by using bioengineering techniques to stabilize
the clay slopes.
The work planned
for the summer of 2004 is the main part of the stabilizaiton work.
First of all, it will consist of constructing ten additional groynes,
and adjustments to the four built in September 2003, to bring the
total to fourteen. These groynes will be built with "large
woody debris" (cedar stumps) anchored to granite boulders and
protected by large riprap rocks. They will protect the slide toe
from erosion, add biomass to the river system, and provide shelter
for migrating salmon during fall floods. Then the bioengineering
will take place with live pole staking of willows and cottonwood,
wattles of willow whips, to help stabilizing the slopes with vegetation.
Erosion from
the Tolmie Slide produces clay silt that causes siltation of 28
km of downstream Chilliwack River, sealing spawning gravel and smothering
aquatic life so important for rearing healthy fish fry and smolts.
If we are able
to aquire sufficent funding for 2004 the major part of the work
will be complete.
Our major funding
partner was the Pacific Salmon foundation and Habitat Conservation
Trust Fund.
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