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Magenta Drain Restoration

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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 Magenta Drain Restoration Project will restore a degraded 800-foot segment of an artificial drainage channel within Memorial Park in Grass Valley, California, transforming it into a functional riparian ecosystem. Originally constructed in the 1800s to manage mining discharges, the channel remains ecologically impaired despite remediation of legacy contamination, with steep, uniform banks, invasive vegetation, and minimal habitat complexity. The project will focus on habitat enhancement across 0.67 acre of the 0.73-acre project area, involving re-contouring 0.09 acre to improve channel stability and hydrology, placing habitat boulders across 0.08 acre to create aquatic microhabitats, and removing invasive species while revegetating 0.56 acre with native riparian trees, shrubs, and understory plants to restore canopy cover, reduce erosion, and support wildlife. Additionally, 0.03 acre of bioengineered rock slope protection will replace an aging retaining wall, using natural materials to stabilize banks and promote ecological connectivity. Incidental recreational improvements totaling 0.07 acre include a gravel trail and limited access steps and seating boulders designed to provide controlled public viewpoints without disrupting restoration efforts. No new structures, land use changes, or expanded developments are included. All work is confined to enhancing the existing degraded drainage corridor, with the goal of increasing ecological function, improving waterway stability, and creating a self-sustaining riparian habitat. The project, forecasted for release in June 2026 by the City of Grass Valley, is led by City Planner Amy Wolfson and will result in a significantly more resilient and biodiverse ecosystem compared to current conditions.

General Info

Restore 800-foot degraded drain to native riparian habitat with recontouring, boulders, native planting, and bioengineered slopes.

Agency

California → City of Grass Valley

NAICS

237990 - Other Heavy and Civil Engineering ConstructionView NAICS

Place of Performance

Central Avenue, Race Streets, Grass Valley, CA, 95945

Set-Aside

NONE

Documents

(1)

NOE Magenta Drain Restoration Project

PDF•notice-of-exemption

AI Contract Breakdown

Uniform Contract Format

Timeline

PostedJun 1

forecast

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Organization & Contact Information

AgencyCalifornia → City of Grass Valley

Contacts1 person available

OfficeN/A

Organization / Agency

California → City of Grass Valley

Office AddressN/A

Contacts

Amy WolfsonCity Planner

contact@example.gov

+1 (555) 000-0000

Full Description

The Magenta Drain Restoration Project is a habitat restoration effort that will occur along an approximately 800 linear-foot segment of Magenta Drain within Memorial Park. Magenta Drain is a historically altered, artificial channel originally constructed in the mid 1800s to convey groundwater and mining discharges from the Empire Mine area. Although legacy mining contamination has been remediated, the channel remains highly degraded and ecologically impaired, characterized by a steep, uniform V-shaped profile, disturbed fill substrates, limited channel complexity, and a riparian corridor dominated by invasive plant species and nonnative ornamental trees. Existing conditions provide minimal aquatic or riparian habitat and limited ecological function. The project will restore approximately 0.73 acre, with 0.67 acre (91%) consisting of habitat restoration activities. Restoration components include re-contouring the channel and banks in key areas totaling 0.09 acres to improve stability and hydrologic function, habitat boulder augmentation within approximately 0.08 acres to increase channel complexity and aquatic microhabitats (of this 0.08 acres, individual habitat boulders total 0.02-acres with the remaining area consisting of the existing substrate), and invasive species removal and native riparian revegetation across approximately 0.56 acres. Revegetation will utilize regionally appropriate native riparian trees, shrubs, and understory species to establish a dense canopy to improve shading and suppress reestablishment of invasive species while enhancing wildlife habitat. Approximately 0.03 acres of vegetated rock slope protection will be installed to replace an existing vertical retaining wall using bioengineered methods that stabilize banks while supporting ecological processes. Minor recreational improvements totaling approximately 0.07 acres (9% of the project area) are included and are incidental to the habitat restoration objectives. These consist of a gravel trail (approximately 0.05 acres) and limited creek access steps and seat boulders (approximately 0.01 acres) to provide controlled public access and viewing opportunities while avoiding disturbance to restored habitats. The project does not include new buildings, expansion of developed uses, or changes in land use designation. All work is limited to restoration and enhancement of an existing degraded drainage corridor. Upon completion, the project will result in a more stable and ecologically functional riparian ecosystem that improves habitat quality, channel stability, and ecological processes compared to existing conditions.