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  4. ›RIO DE FLAG FLOOD CONTROL PROJECT PHASE 4 LOWER RDF INLET

U.S. Department Of Defense·Arizona

RIO DE FLAG FLOOD CONTROL PROJECT PHASE 4 LOWER RDF INLET

Closes 9/18/2026$5M – $15MRequest for Proposal
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Description

This solicitation calls for all labor, materials, and equipment needed to construct Phase 4 of the Rio de Flag Mainstem flood‑control project in Flagstaff, Coconino County, Arizona. The contractor will be responsible for site preparation, earthwork, concrete structures, drainage installations, and related civil works to improve flood protection in the lower Rio de Flag inlet area. The work is part of a larger multi‑phase effort to mitigate flood risk and enhance water management infrastructure in the region. • Scope includes full construction services (design‑build) for Phase 4, encompassing structural, hydraulic, and environmental components. • Must coordinate with U.S. Army Corps of Engineers and local stakeholders; compliance with federal, state, and local regulations required. • Project location is in Flagstaff, AZ; anticipated to involve significant heavy‑civil construction activities in a sensitive watershed.

Attached files

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

Contact

Otse Adikhai

[email protected]

(213) 452-3248

Key dates

Opened
8/27/2026
Closes
9/18/2026

Last updated

Details

Type
Request for Proposal
Industry
Civil Engineering
NAICS
237990
Solicitation №
W912PL26S0050

Budget estimate

$5,000,000 – $15,000,000

The contract likely falls in the multi‑million‑dollar range typical for a Phase 4 flood‑control construction effort. Based on similar USACE civil projects, a reasonable estimate is $5 million to $15 million, depending on the final scope, material costs, and labor rates.

AI estimate from the solicitation

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