This document provides details on a federal contract opportunity for construction work on the Sacramento River East Levee in California. The Army Corps of Engineers seeks a firm-fixed price contract to construct approximately 1.8 miles of various types of seepage cutoff walls along sections of the levee. Additional scope of work includes utility relocations, railroad protection, relief well modifications, removal and replacement of a city sump, and contaminated soil handling. Work must be completed by December 2021 with levee reconstruction by September 2021. The estimated value is between $25-100 million. Bids are due by November 30, 2020 under Solicitation Number W9123821B0001. Construction NAICS code 237990 applies. The solicitation will proceed unrestricted but must use contractors from the Pre-Qualified Sources List.