U.S. Army Corps of Engineers Winfield, Missouri, United States

Major lock and dam restoration under a five-year federal IDIQ contract

Lock and Dam 25 historic lock and dam Civil Construction Work

Historic lock and dam restoration

Originally constructed in 1939, Lock & Dam 25 is listed on the National Register of Historic Places. Alberici performed major repairs and upgrades to 14 60-foot tainter gates, three 100-foot roller gates, and a service bridge on the 1,296-foot-wide dam spanning the Mississippi River. The project allows the lock and dam to continue providing the safe transportation of more than 20 million tons of goods each year.

Lock and Dam 25 exterior, Civil Construction Work

Achieving Army Corps standards under a five-year IDIQ contract

Under an indefinite delivery-indefinite quantity (IDIQ) contract to the U.S. Army Corps of Engineers (USACE), Alberici coordinated multiple mobilizations and demobilizations on the river during a five-year period as federal funds became available. All work was carefully coordinated by Alberici to address the project’s many challenges while effectively achieving USACE’s high standards for safety and quality.

Lock and Dam 25 working on water, Civil Construction Work

Working on water

Structural gate repairs were performed while supported on a floating plant in the river, which was affected by variable water conditions and river traffic. The gates also feature a complex, five-part vinyl-based gate coating system that required very specific ambient conditions and recoating intervals. Alberici also replaced crane rails and tainter gate lifting chains, installing electrical controls, and refurbishing operating equipment. Despite near-record flooding and multiple work stoppages due to river barge traffic, the team kept the project on schedule.

Effective resource utilization

Alberici self-performed nearly 68 percent of the entire contract, including structural concrete placement, steel erection, equipment repair and installation, floating plant operations, and marine support. Key to the project’s success was Alberici’s 10-acre port facility on the Mississippi River, which provided safe working areas for prefabrication of structural components and pre-assembly of materials prior to final installation.

Alberici’s performance on this project resulted in the award of a similar five-year rehabilitation contract at nearby Lock & Dam 24.