The old Patterson Creek culvert under SR 202 east of Sammamish was narrow. During spawning season, the water would flow too quickly through it, keeping salmon from continuing to spawning grounds upstream. The new wider culvert has a natural creek bed, opening up miles of habitat.
Tags: SR 202 Sammamish fish passage salmon steelhead trout culvert Patterson Creek tributaries ^TAP
Two old culverts that carry tributaries to Patterson Creek under SR 202 west of Fall City are narrow. During spawning season the water goes through the culverts too quickly for salmon to continue upstream. Replacing these with wider structures and natural creek beds will open up more habitat for salmon and other marine life.
Tags: SR 202 Sammamish fish passage salmon steelhead trout culvert Patterson Creek tributaries ^TAP
Two unnamed tributaries to Patterson Creek, located under SR 202 just west of Fall City, also create barriers to fish passage. While this tangle of material at the inlet to the culvert was relatively easy to remove, during spawning season the old narrow culvert forces water to flow too quickly for salmon to continue upstream. These will be replaced with wider culverts that allow for natural creek beds, making it easier for salmon to continue upstream.
Tags: SR 202 Sammamish fish passage salmon steelhead trout culvert Patterson Creek tributaries ^TAP
Prefabricated concrete culverts allow us to complete fish passage projects more quickly. In the case of SR 202 at Patterson Creek, the work was finished during the weekend of Aug. 29-30. The prefab sections are lifted into place, then creek bed material is added before the culvert is capped and buried.
Tags: SR 202 Sammamish fish passage salmon steelhead trout culvert Patterson Creek tributaries ^TAP
Among the last steps to the SR 202 Evans and Patterson Creeks fish passage project, like most work, is repaving. By Sunday afternoon, Aug. 30, our contractor crews were putting down asphalt even as water was starting to trickle through the new Patterson Creek culvert.
Tags: SR 202 Sammamish fish passage salmon steelhead trout culvert Patterson Creek tributaries ^TAP