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  5. ›Wastewater Treatment Plant BNR Tank Access (Ladders)…

City of O'Fallon·Missouri

Wastewater Treatment Plant BNR Tank Access (Ladders) - O'Fallon, MO

Closes 10/30/2025$200k – $260kInvitation for Bid
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Description

The City of O'Fallon is seeking a qualified contractor to furnish all labor, materials, tools, and equipment required to install twenty (20) access ladders in the Biological Nutrient Removal (BNR) tanks at its wastewater treatment plant. The work includes installing sixteen ladders in the anoxic tanks and four ladders in the aerobic tanks, re‑configuring existing conduit on the precast walkways above tanks #2 and #4, adding new conduit, junction boxes, and pulling new wiring to accommodate the ladder installations. Bids must be sealed, submitted by the bid deadline, and include a five‑percent bid security. The contract documents are available for public inspection at Drexel Technologies.

Attached files

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

Contact

Shawn Singer(Project Manager)

[email protected]

Key dates

Opened
10/3/2025
Questions due
10/22/2025
Pre-bid meeting
10/14/2025
Closes
10/30/2025

Last updated

Details

Type
Invitation for Bid
Industry
Water Management and Sanitation
NAICS
237110
Solicitation №
25-074

Budget estimate

$200,000 – $260,000

The engineer’s estimate for the project is approximately $230,000. Accounting for typical contractor margins (10‑20 %) and possible change‑order allowances, the expected contract award could range from roughly $200,000 on the low end (if design scope is minimal) to $260,000 on the high end (including contingency and additional electrical work).

AI estimate from the solicitation

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