The Casper-Alcova Irrigation District (CAID) provides essential water delivery through canals and other irrigation infrastructure to over 23,500 acres of irrigated land in Central Wyoming. Over the years, WLC has had the opportunity to provide civil engineering, surveying, and construction materials testing on several projects associated with CAID. In 2021, WLC was hired to provide civil engineering design and construction contract administration for the 102 Overflow Check Structure Rehabilitation project. This project was completed in April 2022.
Built in the 1930’s as part of the Kendrick Project, the concrete structure is located on the main Casper-Alcova irrigation canal and is intended to discharge the entire volume of the main canal into an existing drainage in the event of a canal failure downstream of the structure. An evaluation of the structure identified several large cracks on the underside of the canal and a deficiency in the overflow gates operation. After several configurations were evaluated for flow capacity, constructability, and cost, WLC concluded the check structure was in good condition and able to be rehabilitated.
WLC’s final designs consisted of a 10’x3’ reinforced concrete box culvert under drain, two 8’x6’ slide gates for the overflow control, and 10’x19’ reinforced concrete box culverts for the discharge side of the structure. Completion of this project provides the CAID reliability and peace of mind for a critical piece of their irrigation infrastructure.