26CRDLWBBDODD-0008S - Alum Application @ Silver Lake

The Iowa Department of Natural Resources (DNR) has issued a Request for Bid (RFB) numbered 26CRDLWBBDODD-0008S for alum treatment services at Silver Lake in Delaware County. The procurement seeks a contractor to perform two years of aluminum sulfate and sodium aluminate applications across the lake's North and South Zones, with the primary objective of reducing phosphorus concentrations and mitigating algal bloom frequency and intensity. Specific deliverables include mobilization and demobilization for both 2026 and 2027, with precise chemical application requirements: 9,848 gallons of liquid aluminum sulfate and 4,874 gallons of liquid sodium aluminate for the North Zone, and 5,452 gallons of aluminum sulfate and 2,698 gallons of sodium aluminate for the South Zone in each year. Bidders must demonstrate technical expertise in alum application methodologies, provide company history, key personnel resumes, and three customer references. The bid opened on January 14, 2026, at 11:30 AM CST and will close on February 5, 2026, at 9:00 AM CST, with bidding conducted through the JAGGAER platform. Evaluation criteria include compliance with Iowa's standard contract conditions and technical capabilities in lake restoration techniques.

The solicitation does not explicitly mention set-aside designations or restrictions for specific enterprise types. The project is based on a 2020 feasibility study by Shive Hattery and Limnotech, which identified alum application as the most cost-effective restoration method for Silver Lake, with sediment core samples from late 2025 used to confirm precise alum dosing requirements. While specific budget ranges are not detailed in the documentation, the State of Iowa allows sixty days for invoice payment per Iowa Code 8A.514, with potential early payment discounts at fifteen and thirty days. Bidders are expected to provide written acceptance of specification terms and conditions, and the contract appears to be open to qualified environmental services or lake restoration firms with demonstrated expertise in phosphorus management and alum application techniques. The two-year project scope suggests a comprehensive approach to lake ecosystem management, targeting long-term reduction of algal bloom occurrences through targeted chemical intervention.