# Stillwater Ionwave #40-2025

Stillwater Water Treatment Plant Solids Contact Unit Rehabilitation and Concrete Repairs

**Posted:** October 10, 2026
**Respond By:** November 11, 2026
**Identifier:** 40-2025
**NAICS:** 237110, 237990, 238110

Stillwater Utilities Authority is seeking construction bids to rehabilitate solids contact units and repair concrete at its regional water treatment plant.
- **Buyer:** Stillwater Utilities Authority (SUA), City of Stillwater, Oklahoma; Engineering Department.
- **Scope:** Controls and partial equipment replacement for the Solids Contact Units (SCUs), excluding concrete repairs, plus repairs to the Middle and South SCUs.
  - SCU rehabilitation: 1 lump-sum item.
  - Concrete crack repair: 1,650 linear feet.
  - Concrete surface repair at 6-inch depth: 10 square feet.
- **OEM/vendor information:** General Filter Company is identified on existing drawings as the maker of the solids contactor control panels; no replacement equipment brand is specified for this solicitation. Black & Veatch Corporation prepared the project manual and is not identified as an equipment supplier.
- **Notable requirements:** Keep the treatment plant operating during construction; meet contractor and instrumentation-and-controls subcontractor qualification requirements; comply with Davis-Bacon prevailing wages and American Iron and Steel / Build America, Buy America requirements.
- **Performance:** Substantial completion is required within 455 calendar days of the Notice to Proceed. Final completion is due within 485 days of the Notice to Proceed or 30 days after substantial completion, whichever comes first. A one-year maintenance bond period applies after acceptance.
- **Existing equipment shown in the attached plant plans:** The equipment schedule includes tanks, basins, filters, pumps, chemical feed systems, ozone systems, and SCU control components. These are drawing references and are not all identified as items being purchased under this bid.

### Description

The solicitation seeks controls and partial equipment replacement for the Solids Contact Units (SCUs) at the Stillwater Water Treatment Plant. Work also includes concrete repairs for the Middle and South SCUs. Electronic bids are required through Stillwater IonWave, and attendance at the pre-bid conference is mandatory, either in person or virtually. The solicitation requires bid security of at least 5% of the bid amount.

[View original listing](https://stillwater.ionwave.net/PublicDetail.aspx?bidID=314&SourceType=1)