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Syphon Reservoir Improvement Project

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State & Local

Contract Overview

Solicitation details, issuing organization, response deadlines, documents, and interested companies for this government contract opportunity.

AI Contract Overview

The Syphon Reservoir Improvement Project involves replacing a 59-foot dam with a new 138-foot engineered dam to expand recycled water storage capacity from 500 to 5,000 acre-feet, enhancing water supply reliability in southern California. The project includes a spillway for flood protection, a seepage control drainage system, and a circulation/aeration system to maintain water quality. Construction is expected to last 60 months beginning in 2026, with operations focused entirely within the project site northeast of Portola Parkway in Irvine, California, under the oversight of the Irvine Ranch Water District. Environmental compliance is central to the project, with significant impacts anticipated on 90.97 acres of Crotch’s bumble bee habitat, including permanent loss of 64.21 acres and temporary disruption to 26.76 acres, triggering the need for an Incidental Take Permit from the California Department of Fish and Wildlife under the California Endangered Species Act. Mitigation measures include off-site habitat creation, land acquisition for conservation, and long-term biological monitoring. The project adheres to CEQA guidelines, SCAQMD air quality rules, DSOD dam safety standards, and Alquist-Priolo earthquake fault zoning, with strict thresholds for construction and operational emissions. All construction activities require cultural resource monitoring, hazardous material handling protocols, wildfire defensible space measures, and traffic control plans. While no federal contract clauses, pricing data, or procurement evaluation factors are present, the project is governed by binding environmental mitigation obligations and regulatory approvals tied to its design, construction timeline, and post-construction performance.

General Info

Replace 59-foot dam with 138-foot dam to expand recycled water storage, mitigate endangered bee habitat loss, comply with environmental regulations.

Agency

California → Irvine Ranch Water District

NAICS

237990 - Other Heavy and Civil Engineering ConstructionView NAICS

Place of Performance

Portola Parkway and Sand Canyon Avenue, Irvine, CA, 92620

Set-Aside

NONE

Documents

(4)

Syphon Reservoir Improvement Project Addendum No. 3 Notice of Determination

PDF•addendum

Addendum No. 3 to Syphon Reservoir Improvement Project FEIR

PDF•addendum

2081-2025-033-05 Syphon Reservoir CEQA Findings and Addendum

PDF•ceqa-findings-addendum

2081-2025-033-05 Syphon Reservoir Notice of Determination

PDF•notice-of-determination

AI Contract Breakdown

Uniform Contract Format

Timeline

PostedDec 16

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Organization & Contact Information

AgencyCalifornia → Irvine Ranch Water District

Contacts1 person available

OfficeN/A

Organization / Agency

California → Irvine Ranch Water District

Office AddressN/A

Contacts

Emily LeEnvironmental Compliance Analyst

contact@example.gov

+1 (555) 000-0000

Full Description

The project would increase the capacity of the existing recycled water reservoir from approximately 500 acre-feet (AF) to 5,000 AF. The project would replace the existing engineered dam with a new engineered dam, increasing the existing 59-foot dam height to 138 feet and increasing the elevation of the dam crest from the existing 388 feet above mean sea level (amsl) to 468 feet amsl. A new spillway would be included with the new dam to protect the reservoir from overtopping. As part of the new design, the engineered embankment dam would include a seepage control drainage system and a circulation/aeration system for the reservoir. The existing strainer and disinfection facilities would be demolished, reconstructed and expanded at the toe of the new dam to provide filtration, chlorination and de-chlorination. Additional project features include new onsite access and maintenance roads and wetland and riparian mitigation areas. Environmental review of the potential impacts associated with the Syphon Reservoir Improvement Project Design Refinements has been completed, and Addendum No. 3 to the Syphon Reservoir Improvement Projects Final Environmental Impact Report (FEIR) has been prepared. The purpose of Addendum No. 3 is to describe and evaluate the potential environmental effects associated with the Syphon Reservoir Improvement Project Design Refinements that involve refinements and nuances to the project in comparison to the preliminary design that was analyzed in the Syphon Reservoir Improvement Project FEIR. The FEIR determined that the project would not in any significant impacts. Addendum No. 3 describes and evaluates the potential environmental effects associated with the Syphon Reservoir Improvement Project Design Refinements pursuant to CEQA Guidelines Section 15164.