This document provides details for a federal contract solicitation seeking construction services. The U.S. Army Corps of Engineers is soliciting proposals for the construction of an addition and alteration to the existing flight simulator facility at Ellsworth Air Force Base in South Dakota. Proposals are due by October 15, 2021 and the estimated construction cost is between $20-40 million. Due to current site access limitations, the Corps will provide virtual site access through photos, drawings and a virtual site visit. Questions regarding the solicitation must be submitted through the ProjNet website.