Elwha River Restoration Project – Lake Mills Delta Erosion

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PROJECT: Elwha River Restoration Project – Lake Mills Delta Erosion In preparation for the Gline’s Canyon dam removal, the Project Highlights: National Park Service determined that the Lake Mills Delta • Work Performed on the Delta Where would have to be reconfigured to speed erosion of the the Elwha River Flows into Lake Mills estimated 8 million cubic yards of sediment that has • No Road Access to Lake Mills Delta accumulated in the lake. They contacted Cherokee • Flexi-Float Barge Utilized for Site Construction Services in June 2010 to discuss feasibility considering there are no roads to access the delta. Due to the Access schedule of the dam removal we had to finish all work in the • 35 Acres Cleared, 15,000 Cubic Yards late summer of 2010. Excavated & Log Jam Reconfigured in 22 Working Days In September we constructed a Flexi-Float barge and transported 11 pieces of equipment to the delta and began Project Vitals: clearing the 30 acres of alder trees on the delta. Due to areas of quicksand we were going to leave 9 acres wooded, but • Client: US Department of the when the reservoir level was dropped the quicksand dried up Interior, National Park Service and we cleared the rest at no additional cost. Getting fuel to • Location: Olympic National Park, the site required a full time boat crew and the barge shuttling Lake Mills, Washington fuel to the delta every day. When the clearing was completed • Contract Amount: $743,708.00 the crew then rechanneled the Elwha River so that it would cut • Duration: August 2010 – October 2010 through the delta. To speed the rechanneling a log jam was • Contract #: 1443C2011101400 reconfigured to block the existing channel. All of this work was • Amount Self-Performed: 83% in the endangered Bull Trout habitat and measures were taken • to lessen our impact on these fish. Four weeks after the first NAICS Code: 237990 equipment landed on the delta we started to demobilize off the job with the work wrapped up in the first week of October 2010. Honest. Innovative. Customer Driven. 360-694-9464 | www.CherokeeConstruction.biz .

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