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Forest Service lists two top options for Spirit Lake outflow in draft EIS; Cowlitz County staff to prepare briefing before comment deadline
Summary
Public works reviewed the Forest Service draft environmental impact statement on Spirit Lake outflow and asked the board how deeply staff should investigate the Spirit Lake Tunnel alternatives ahead of an October comment deadline; the Forest Service's two top choices are (1) restore the tunnel capacity to 550 cubic feet per second or (2) install a
Public Services staff asked the Board of County Commissioners for direction on how extensively the county should analyze the Forest Service draft Environmental Impact Statement (EIS) for the Spirit Lake outflow and said the Forest Service has identified two leading alternatives.
Mike Moss said the Forest Service's two top choices are: (1) repair and restore the historic Spirit Lake tunnel to a capacity of about 550 cubic feet per second (CFS); or (2) install a pressure (steel) pipe for primary outflow, perform minor tunnel rehabilitation, and construct an overflow channel to reconnect the North Fork Toutle (transcript used "Toodle") to Spirit Lake while routing the primary outfall through the new pressurized line. "Their 2 top choices are 1 is repair of the…
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