The Hemphill Diversion Structure is located on Auburn Ravine northeast of the City of Lincoln in Placer County. The structure diverts water from Auburn Ravine into the Hemphill Canal located south of the ravine for delivery to NID raw water customers. The Hemphill Diversion Structure is an approximately 8-foot tall concrete structure that has been utilized by the District since its purchase of the facility in 1933.
Auburn Ravine is identified as a salmon and steelhead habitat and the Hemphill Diversion Structure has been identified as a barrier within Auburn Ravine. The District proposes to remove the Hemphill Diversion Structure within Auburn Ravine.
On July 28, 2021, the District's Board of Directors adopted a resolution to certify and adopt the Final Environmental Impact Report for the Hemphill Diversion Structure and approved project as recommended by staff to implement Alternative 2 as the preferred Alternative.
The Final Environmental Impact Report and Appendices are available for review in the section below.