Award - Pipestem Dam Spillway Modification Project, Pipestem Creek, Jamestown, ND.

The Pipestem Dam Spillway Modification Project, located on Pipestem Creek northwest of Jamestown, North Dakota, is a Department of Defense construction contract managed by the U.S. Army Corps of Engineers, Omaha District. The project involves the construction of a stepped roller compacted concrete spillway chute structure featuring an integrated three-stage labyrinth crest control structure, approach walls, and a stilling basin designed to prevent downstream erosion. Additional scope includes the installation of training dikes on the left and right sides of the channel for flanking protection and the lowering of the upstream spillway and approach channels to 6 to 8 feet below the existing grade. Administered under solicitation W9128F22B0002, the project utilized a Two-Step Sealed Bid process for a firm fixed-price contract. Technical requirements include the placement of approximately 71,000 cubic yards of roller compacted concrete and 60,000 cubic yards of soil cement, with performance beginning within 10 calendar days of award and a total completion period of 1,095 calendar days. The project is supported by extensive geotechnical data, including subsurface soil borings and bedrock contours, and adheres to strict ASTM material testing standards for compressive strength and air content.