AIDEA weighs Acrow modular bridges for Ambler road after Red Dog tour

AIDEA is weighing a bridge technology that could shape the cost and schedule of the 211-mile industrial road it wants built to the Ambler Mining District, after board members and staff watched Acrow modular bridges operating at Red Dog Mine in late September. Acrow's modular system assembles prefabricated steel spans on site, a method the authority is examining for installation efficiency, adaptable design and potential savings in both time and cost on the proposed Ambler Access Project.

Chairman Bill Kendig and Executive Director Randy Ruaro toured the mine with Acrow's James Porreca and John Brain and Kuna Engineering's Benjamin Denner. AIDEA financed and developed the DeLong Mountain Transportation System, the road and port that already serve Red Dog; that existing infrastructure gives the authority a working model to study before committing to a design for Ambler. The Kotzebue trip also included meetings with Northwest Arctic Borough officials on workforce development and local priorities.

AIDEA estimates the two-lane Ambler road would cost $350 million to build, plus $8 million to $10 million a year in operations and maintenance, and the authority has already approved moving $50 million into a Revolving Fund subaccount designated for the project. The release describing the Red Dog visit includes no cost figures tied specifically to the bridge evaluation.

The road's regulatory path has shifted sharply within the past year and a half. The Bureau of Land Management terminated AIDEA's right-of-way grant in June 2024 through a Record of Decision that selected the No Action Alternative, then reissued the 50-year grant on Oct. 21, 2025, after President Trump issued a directive the previous month. NANA Regional Corporation's board withdrew from involvement in May 2024, citing what it called an inadequate federal review and consultation process; the corporation has not issued a public response to the grant's reissuance.

The release highlights Red Dog's economic footprint: more than 900 shareholder jobs, $65 million in wages paid in the NANA region, and operator Teck's $108 million in annual wages and $280 million spent in Alaska in 2024. Those figures come from AIDEA's own account of the trip and include no comment from Acrow, Kuna Engineering or project opponents; the record here reflects only the authority's side of a project that remains contested.