EMWD approves design agreement for Calle Medusa lift station

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The Eastern Municipal Water District board approved a contract with Krieger & Stewart for a siting study and the preliminary design work for the Calle Medusa lift station and force main.

The board vote was 4-0, Oct. 7, with Stephen Corona recusing himself due to a professional conflict of interest. Krieger & Stewart will be paid $98,000 for that work, and the board appropriated $376,200 which will also cover an environmental consultant, district labor costs and a potholing contractor.

The Calle Medusa sewer provides service to approximately 700 residences in the Solana Vista, Tierra Brisa and Saddlewood homeowners association neighborhoods in Temecula. Eastern recently completed a sewer protection and erosion mitigation project which is considered to be an interim solution. EMWD staff desires a permanent solution to the continued erosion within an unnamed creek adjacent to the sewer. A January 2020 administrative action awarded a contract to HDR Inc. for a hydrologic assessment of the unnamed creek.

The HDR assessment determined that storm events could undermine the sewer at an exposed location and cause a release. At least four other locations along the creek also show evidence of continued erosion which will require bank stabilization. An assessment of various options resulted in a preference for a lift station. HDR recommended implementing an emergency erosion mitigation project to stabilize the exposed location until the new lift station is installed. In May 2020 a contract to implement the erosion mitigation effort was awarded to Schuler Constructors, and that work was completed in August.

On July 14, the district issued a request for proposals for the Calle Medusa lift station and force main siting study and preliminary design. Three firms responded by the Aug. 24 deadline. A review panel recommended Krieger & Stewart as the preferred firm due to the company’s detailed understanding of the project, qualifications of the team, and ability to deliver the project on an expedited basis.

A separate $45,000 contract with Brown and Caldwell addresses facilitation services among potentially interested parties such as the Riverside County Flood Control and Water Conservation District, the Metropolitan Water District of Southern California and Southern California Edison. Although none of the potential partners has committed to a cost sharing agreement, the facilitation will be conducted on a parallel track with the lift station work. The facilitation will determine whether a cost sharing agreement can be reached within Eastern’s timeline requirements.

Joe Naiman can be reached by email at jnaiman@reedermedia.com.