South Cobb Water Reclamation Facility Secondary Clarifier Rehabilitations

The contract solicits bids for the rehabilitation of four secondary clarifiers at the South Cobb Water Reclamation Facility in Marietta, Georgia, with Clarifier #3 having failed and requiring urgent repairs. The scope encompasses comprehensive cleaning, sandblasting, and repainting of all metal and concrete surfaces within the clarifiers, including scum beaches, scraper arms, drive supports, and effluent launders. Critical tasks include rebuilding and replacing the drive assembly for Clarifier #3, performing maintenance on the drive systems for Clarifiers #1, #2, and #4, and replacing key components such as scum baffles, effluent weirs, feed wells, scraper blades, rubber seals, spray water headers with new PVC piping and nozzles, and installing davit cranes for three scum pump stations. Surface preparation standards require SSPC-SP7/NACE No. 4 for general steel and SSPC-SP10/NACE No. 2 for bare metal areas, with welding performed per AWS specifications and fiberglass replacements conforming to AWWA F102 and ASTM C581. A third-party engineering report is required after cleaning Clarifier #2 to guide further improvements, and each rehabilitated clarifier must undergo a 30-day commissioning test prior to formal acceptance. The work is to be completed within 730 days of the Notice to Proceed at the facility located at 660 South Cobb Drive, Marietta, GA. Bidders must submit proposals exclusively through the Cobb County eProcurement Portal by the deadline of August 27, 2026, and are required to provide a bid bond equal to at least five percent of the base bid issued by a Georgia-registered surety listed in U.S. Treasury Circular 570. Upon award, the contractor must furnish performance and payment bonds each equal to 100% of the contract price, along with a one-year guarantee on materials and workmanship. Insurance requirements include workers’ compensation as mandated by Georgia law, commercial general liability insurance with $1 million per occurrence limits across multiple coverage types, auto liability of at least $1 million per person, a $2 million commercial umbrella policy, and all-risk builder’s risk coverage for 100% of the contract value. The contractor must comply with OSHA standards, including confined space protocols per 29 CFR 1910.146, maintain a satisfactory safety record over the past three years, and ensure all personnel are