| September 9, 2002
Media Advisory As part of two King County stabilization projects designed to protect homes, property, and an existing sewer line near Renton from severe erosion, a heavy-lifting helicopter will begin carrying and placing five-ton payloads of rock and woody debris in a steep ravine Tuesday morning. Combined, the Madsen Creek ravine projects involve the biggest installment of large woody debris in a small stream in King County's history. King County is requesting that Fairwood community members please refrain from entering the work area during the construction period and take precautions to ensure that children stay out of the work area. The helicopter work, which will continue at least through Thursday, marks the second phase the Northwest Tributary Stabilization Project. The county in August used a 210-ton crane to help engineers place much of the 170 logs, rootwads and stumps, and more than 1,700 tons of rounded boulders, streambed cobbles and gravel. Some locations were too remote to reach by crane, so the Columbia Helicopters Boeing Vertol 107 will place the remaining materials. The project will help prevent landslides and erosion by stabilizing the steep slopes and controlling fast-moving erosive stream flows. The ravine is unstable due to increased surface water runoff from development in the area, and the materials placed in the steep channels will slow down the stream flow. In some locations, the material will also restore fish habitat. For more details about the projects, call the construction information line at (206) 469-0302. Related Information |
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