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Navajo Nation·Arizona

Proposal for the Tohatchi Diversion Project

Closes 11/20/2026$500k – $2MInvitation for Bid
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Description

The Navajo Nation Department of Water Resources is seeking qualified contractors to rehabilitate the existing Tohatchi Diversion Dam and associated infrastructure. The work includes replacing water gates, extensive earth and sediment removal, installing a sediment‑capture system, constructing a reinforced concrete outlet channel, providing maintenance plans and training, and delivering a conceptual design for a future dam. The contract requires compliance with Navajo Nation regulations, environmental permitting, and a one‑year warranty on all installed components.

Attached files

Contact

Todd Antonio

tantonio@navajo‑nsn.gov

(928) 729‑4145

Key dates

Opened
9/16/2026
Closes
11/20/2026

Last updated

Details

Type
Invitation for Bid
Industry
Water Management and Sanitation
NAICS
236220
Solicitation №
Bid No. 26‑07‑4226SB

Budget estimate

$500,000 – $2,000,000

While the solicitation does not disclose a contract value, similar dam rehabilitation projects typically range from several hundred thousand to a few million dollars depending on site conditions, gate size, concrete work, and engineering services. Considering the need for gate replacement, extensive earthwork, sediment‑capture system design, and concrete channel construction, a reasonable estimate would be between $0.5 million and $2 million. Factors influencing the final amount include material costs, labor rates, permitting fees, and the scope of the optional future‑dam conceptual design.

AI estimate from the solicitation

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