Road B at Salt Hollow Creek Culvert RSP Bank Reinforcement

The project involves the interim stabilization of the outlet of the existing Salt Hollow Creek culvert on Road B in Redwood Valley, California, to address failures in the wingwalls and previously installed concreted rock slope protection that have led to embankment instability and roadway settlement. All failed structures—including the wingwalls, concreted RSP, and a temporary sandbag wall—will be demolished and replaced with engineered rock slope protection walls measuring approximately 20 feet by 15 feet on the left bank and 25 feet by 15 feet on the right bank. These new RSP walls will be keyed into the existing embankments and supported by a granular filter layer to ensure long-term performance, while the culvert barrel and invert will remain unmodified. Construction is planned for the dry season to minimize environmental disruption, with heavy equipment operating primarily from the roadway, and all activities will incorporate strict measures for water quality, biological resource protection, and erosion control. The work is designed to preserve public safety and maintain access to the roadway until a future full replacement of the culvert can be undertaken. The project is managed by the Mendocino County Department of Transportation, with all work performed at Road B, CR 231A, Milepost 0.69, Redwood Valley, CA 95470. Environmental compliance is governed by an exemption under California Code of Regulations Title 14, Section 15301, which classifies the project as a minor repair to an existing public facility without expansion. No formal contract pricing, line items, or financial values are available, as the documentation appears to be a forecast notice rather than an awarded contract. The agency has not specified contract type, evaluation factors, or special requirements, and no formal FAR clauses, contracting officer details, or invoicing procedures are included. The lead contacts are Josephine Slovut and James Linderman within the department’s environmental compliance team, and submissions, if any, are to be mailed to the department’s office in Ukiah, California. The ultimate beneficiary is the traveling public, with the intervention aimed solely at preventing further degradation and ensuring continued safe passage until a more permanent solution is implemented.