CCNRD CMZ 6 Side Channel
#SRP-09-14464 #SRP-09-14464
 Wenatchee Sub-basin Lower Wenatchee CCNRD CMZ 6 Side Channel
Organization Upper Columbia Salmon Recovery Board Lead Entity
Sponsor Chelan County Natural Resources Department
Status Completed
Schedule Start Date: 9/1/2009 End Date: 11/1/2010
Priority 1
Category Category: Restoration
Project Photo
DESCRIPTION
In 2010, CCNRD completed construction of the CMZ 6 side channel project. The objective of the Lower Wenatchee River Channel Migration Zone (CMZ) 6 Side Channel project is to increase habitat diversity and off channel refuge and rearing opportunities for juvenile steelhead and spring and summer Chinook salmon. The project is located at RM 3.5 where construction of US 2 disconnected the river from a 23 acre floodplain and 1,400 foot side channel. The project will create a 500 foot side channel in WSDOT Right-of-Way on the south side of US 2. This channel includes 300 feet of newly excavated channel connecting to 200 feet of existing side channel which was excavated by WSDOT to drain the disconnected oxbow habitat to the north of US 2. The inlet channel will be excavated to mimic existing side-channel habitat on the Wenatchee River by allowing flows through an upstream connection during spring runoff. Summer water depths will be maintained by a backwater connection with the Wenatchee River making the habitat accessible to salmonids year-round. Based on the BPA-funded Alternatives Analysis (Jones and Stokes 2008), complete reconnection of the disconnected floodplain (Alt. 3) would be cost prohibitive at $1.5 million, difficult to promote with landowners due to projected orchard flooding , and questionable from a habitat quality perspective due to existing water quality concerns. The complete alternatives analysis is attached in the documents section.
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FUNDING
Proposed Cost $120,451.67
Requested Funds $0
Allocated Funds $0
Spent Funds $0
Balance $0
FUNDING SOURCES
PROJECT CONTACT
PARTNER
SPONSOR
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LOCATION
Legislative District:12
Sections:19
County:Chelan
Chinook-Pop (ESU):Chinook-Upper Columbia River Spring, Wenatchee River, Endangered
Chinook2-Pop (ESU):Chinook-Upper Columbia River Summer/Fall, Not Warranted
HUC12:Nahahum Canyon-Wenatchee River (170200110708)
Steelhead-Pop (ESU):Steelhead-Upper Columbia River, Wenatchee River, Threatened
Township:T23NR20E
Lead Entity Area:Upper Columbia
Salmon Recovery Regions:Upper Columbia River
WRIA:Wenatchee
HUC8:Wenatchee (17020011)
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ACTIVITY-INSTREAM HABITAT PROJECT PCSRF
Acres Of Off-Channel/Floodplain Connected Or Added 00.23 Acres
Miles of Streambank Stabilized 00.02 Miles
Number of structures placed in channel 21 Number
Total Miles Of Instream Habitat Treated 00.1 Miles
ADDITIONAL INFORMATION