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Sierra Club member raises Little Walnut Creek bypass tunnel dewatering concern to Environmental Commission
Summary
A Sierra Club member told the Austin Environmental Commission that water appears to be coming out of the Little Walnut Creek bypass tunnel and dewatering the creek; he said he has discussed the matter with Watershed staff and believes the project is not yet complete.
Craig Naser, speaking as a Sierra Club member during the Environmental Commission’s public communication period on June 4, reported on observations he and other members took at Little Walnut Creek. Naser described a bypass tunnel under Mearns Meadow designed to carry flood overflow and said recent photographs and video show water coming up through joints in the bypass tunnel and appearing to dewater the surface creek downstream.
Naser said he attended public meetings about the bypass project 15 years ago and noted the project-sized escalation from earlier cost estimates. He presented a sequence of photographs and a video taken that afternoon showing low surface flow in stretches of the creek, algae where flow is reduced, and stronger…
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