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Board scraps decomposed-granite surfacing for Windingcough Trail after drainage concerns
Summary
City staff told the Parks and Open Space Board that planned decomposed-granite surfacing for the Windingcough Trail was canceled because sheet-flow drainage would wash the material away, leaving the natural earthen trail as the maintained option.
Staff reported that the planned decomposed-granite surfacing for the Windingcough Trail would be ineffective due to sheet-flow drainage across the property and would require expensive engineered crossings to remain in place. The presenter said engineers found about 90 acres of sheet flow into the area and concluded the material would not be a durable surfacing: "The only ways that we could engineer it to make it work... was to build all sorts of convoluted low water crossings and ramps... and you ended up with this really expensive mechanical looking thing," the presenter said.
As a result, the board was told the project was scrapped and that the natural earthen trail will remain available for use when conditions are dry; staff noted the trail is mowed during the season and marked with orange trail markers. "As approved, we elected to scrap that project," the presenter said, and the board acknowledged that the existing earthen trail remains usable under dry conditions.
