The Licking River Siphon was the location of the largest sanitary sewer overflow (SSO) in SD1’s collection system. Controlling this significant overflow requires a multi-phase approach, including installing a second 12-inch siphon pipe under the Licking River (downstream from the SSO) to provide more outlet capacity.
To construct the parallel 12-inch siphon, horizontal directional drilling was identified as the most efficient option due in part to the length of the river crossing, ground surface, river elevation profile and required diameter of the carrier pipe.
This project is combined with other projects, including the Wilder EQ Tank and an additional conveyance project planned for Phase II of Clean H2O40, and will collectively eliminate 42 million gallons of typical-year SSO volume.