swc2012projects-steelhead haven
DESCRIPTION
This project built a wood revetment 500 feet from the toe of the Steelhead haven landslide thereby reducing fine sediment inputs into the North Fork Stillaguamish. A sediment retention pond was also constructed to capture surface erosion off of the landslide, also reducing fine sediment inputs into the North Fork Stillaguamish River.TRANSCRIPT
Dedicated to restoring and maintaining a healthy
Stillaguamish River Watershed since 1990
www.stillaguamishwatershed.org
The mission of the Stillaguamish Watershed Council (SWC) is to maintain a healthy, functioning Stillaguamish Watershed by
providing a local forum in which agencies, organizations, communities, and the public
can engage in a collaborative watershed based process of decision making and
coordination.This slideshow highlights the work of the SWCwww.stillaguamishwatershed
.org
Steelhead Haven Fine Sediment Reduction Project Sponsored by the Stillaguamish Tribe of Indians
Location
This project built a wood revetment 500 feet from the toe of the Steelhead haven landslide thereby reducing fine sediment inputs into the North Fork Stillaguamish. A sediment retention pond was also constructed to capture surface erosion off of the landslide, also reducing fine sediment inputs into the NF Stillaguamish.
Steelhead Haven Fine Sediment Reduction Project Sponsored by the Stillaguamish Tribe of Indians
Project Site Plan
This project built a wood revetment 500 feet from the toe of the Steelhead haven landslide thereby reducing fine sediment inputs into the North Fork Stillaguamish. A sediment retention pond was also constructed to capture surface erosion off of the landslide, also reducing fine sediment inputs into the NF Stillaguamish.
Expected Channel Migration
Expected Head cut
Expected Change
Log Cribwall Placement
Steelhead Haven Fine Sediment Reduction Project Sponsored by the Stillaguamish Tribe of Indians
This project built a wood revetment 500 feet from the toe of the Steelhead haven landslide thereby reducing fine sediment inputs into the North Fork Stillaguamish.
Cribwall 1,300 feet long, 25 feet high
What the river will see
Steelhead Haven Fine Sediment Reduction Project Sponsored by the Stillaguamish Tribe of Indians
This project built a wood revetment 500 feet from the toe of the Steelhead haven landslide thereby reducing fine sediment inputs into the North Fork Stillaguamish.
Left: Aerial view of the wood revetment backfilled with wood debris Below: Close up of backfill
Steelhead Haven Fine Sediment Reduction Project Sponsored by the Stillaguamish Tribe of Indians
A sediment retention pond was also constructed to capture surface erosion off of the landslide, also reducing fine sediment inputs into the NF Stillaguamish.
20 Acre-feet of storage During the first flooding event the river migrated toward the
structure as designed
For more information about the Stillaguamish Watershed Council visit
our website at:
www.stillaguamishwatershed.org