Install welded steel pipe; structural concrete; & alt pipe culvert.

This project involves the installation of welded steel pipe, structural concrete, and alternative‑pipe culverts across various sites in Humboldt County. It is a mid‑size heavy‑civil construction contract valued at approximately $8.8 million and requires a 240‑working‑day construction schedule. The bid is electronic, with documents released on October 19 2026 and bids opening on December 3 2026. Contractors must hold a Class A license or a combination of Class C licenses (C‑42, C‑8, C‑12) to qualify. The work is located in a rural northern California setting, so logistics and mobilization costs should be considered.