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  5. ›Aerated Sludge Holding Tanks

Charles County Government·Maryland

Aerated Sludge Holding Tanks

Closes 7/30/2026$5M – $15MRequest for Proposal
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Description

The Charles County Government is seeking a qualified contractor to design and construct upgrades to the Aerated Sludge Holding Tanks at the Mattawoman Wastewater Treatment Plant. The upgrades aim to increase the tank capacity to achieve three days of storage at 20 MGD ADF. The contractor will be responsible for preparing contract drawings and specifications, obtaining applicable permits, and providing construction engineering services. The project requires a team with experience in water and wastewater engineering, including a principal, project manager, architect, senior design engineer, design engineer, and process engineer. The contractor must also provide insurance coverage, including commercial automobile, worker's compensation, commercial general liability, and professional liability. Key aspects of the project include: • Design and construction of upgrades to the Aerated Sludge Holding Tanks • Preparation of contract drawings and specifications • Obtaining applicable permits • Providing construction engineering services • Team composition, including principal, project manager, architect, senior design engineer, design engineer, and process engineer • Insurance coverage, including commercial automobile, worker's compensation, commercial general liability, and professional liability

Attached files

The solicitation documents live at the source — open the bid source above to download them.

Contact

Jorge Dominguez(Senior Procurement Specialist)

[email protected]

(410) 302-0614

Key dates

Opened
6/1/2026
Questions due
6/26/2026
Pre-bid meeting
6/17/2026
Site visit
6/18/2026
Closes
7/30/2026

Last updated

Details

Type
Request for Proposal
Industry
Civil Engineering
NAICS
541620
Solicitation №
26-041

Budget estimate

$5,000,000 – $15,000,000

The budget for this project can be estimated based on the scope of work and the requirements for the contractor. The project involves designing and constructing upgrades to the Aerated Sludge Holding Tanks, which is a complex task that requires significant resources and expertise. The contractor will need to prepare contract drawings and specifications, obtain applicable permits, and provide construction engineering services. The project also requires a team with experience in water and wastewater engineering, including a principal, project manager, architect, senior design engineer, design engineer, and process engineer. Given the complexity of the project and the requirements for the contractor, the budget can be estimated to be in the range of $5 million to $15 million. This estimate is based on the assumption that the project will require significant design and construction work, as well as permitting and engineering services. The budget will also depend on the contractor's experience, qualifications, and reputation, as well as the level of competition for the project.

AI estimate from the solicitation

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