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  5. ›Riverside Reginal Water Quality Control Plant (RRWQP)…

City of Riverside·California

Riverside Reginal Water Quality Control Plant (RRWQP) Biosolids Centrifuge 2 Installation

Closes 6/25/2026$750k – $900kInvitation for Bid
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Description

The City of Riverside is seeking qualified contractors to install a new biosolids centrifuge system (Centrifuge 2) at its Regional Water Quality Control Plant. The scope includes electrical conduit work to bypass existing belt‑press controls, demolition of obsolete belt‑presses and polymer equipment, installation of the new centrifuge, associated sludge‑feed and polymer‑transfer pumps, aluminum grating, safety eyewash and back‑flow preventer, and a control‑panel upgrade for the existing centrifuge. The contractor must coordinate a cut‑over window with City staff, provide all labor, materials, equipment, and incidentals, and complete the work within a 90‑working‑day schedule after the Notice to Proceed.

Attached files

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

Contact

Angela Kilgo

Key dates

Opened
5/18/2026
Questions due
6/11/2026
Pre-bid meeting
6/2/2026Mandatory
Closes
6/25/2026
Duration
90 working days

Last updated

Details

Type
Invitation for Bid
Industry
Water Management and Sanitation
NAICS
237110
Solicitation №
BID 8236

Budget estimate

$750,000 – $900,000

The solicitation lists an estimated value of $817,000 for the complete scope. Assuming the contract is awarded at or near the estimated value, the contractor’s gross earnings would likely fall between $750,000 and $900,000, depending on final negotiations, allowable contingencies, and any change‑order adjustments. This range reflects the lump‑sum nature of the work and the fact that the bid includes mobilization, demolition, equipment purchase, installation, and testing.

AI estimate from the solicitation

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