The U.S. Fish & Wildlife Service is soliciting proposals for the construction of precast concrete box culvert structures at the Port Louisa National Wildlife Refuge, specifically for the reconstruction of the Rush Lake Outfall. The project requires the delivery of five-foot by five-foot precast concrete box culverts and associated materials, with a total estimated cost of less than $25,000, emphasizing compliance with quality standards set by the Iowa Department of Transportation. Interested contractors must ensure adherence to safety protocols and environmental compliance, with key deadlines including a site visit on September 11, 2024, and quotes due by September 18, 2024. For further inquiries, potential bidders can contact William Koski at william_koski@fws.gov.