A Formal Plan Has Been Selected For The Argonaut Mine Dam

A Formal Plan Has Been Selected For The Argonaut Mine Dam

A formal plan has been selected to mediate the situation facing the Argonaut Mine tailings dam. At a public meeting in Jackson earlier this month the California Department of Toxic Substances Control (DTSC) discussed an update and reviewed the remedial action plan with citizens. Out of 4 plans presented, the DTSC and EPA have chosen to build an earthen embankment with foaming cellular concrete that includes a spillway to drain the surface water. This plan calls for concrete to be sprayed onto the dam and then an earthen embankment to be placed against the concrete to help with stabilization of the entire structure. The dam, located at the corner Sutter Street and Argonaut Drive in Jackson, built in 1916 to prevent mine tailings from going into Jackson creek. In November 2015, the Department of Toxic Substances Control constructed a temporary storm water diversion system to divert water around the dam until a permanent fix for the dam could be designed and built. The plan is to finalize the remedial action plan by December of this year, completing all design permits by 2018, and then implementing the design in 2019. 

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