Humboldt 101 Drainage South

This project will rehabilitate drainage systems at 38 locations along U.S. 101 in Humboldt County approximately from the Mendocino County line to Rio Dell. It is necessary to preserve the roadway and prevent potential damage from storm events by repairing failing and deteriorated drainage systems that have exceeded their design life.

Project Description

This project will rehabilitate drainage systems at 33 locations along U.S. 101 in Humboldt County approximately from the Mendocino County line to Rio Dell. It is necessary to preserve the roadway and prevent potential damage from storm events by repairing failing and deteriorated drainage systems that have exceeded their design life.

Timeline

Construction is anticipated to be complete by the end of 2026.

Traffic Impacts

Minimal

Documents

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•  Final Environmental Document:
  • Initial Study with Mitigated Negative Declaration and Final Section 4(f) de minimis Evaluation - April 2023 (PDF)

For more information, contact:

Project Manager
Marie Brady
(707) 296-5511

Environmental Coordinator
Julie Price 
(707) 362-5431

Public Information (Media inquiries)
Myles Cochrane
(707) 498-4272

Last reviewed: March 2025