Columbia-Snake River system faces legal, cost pressures, PNWA says

The Columbia-Snake River system remains a critical export corridor but faces ongoing legal, regulatory and economic pressures, according to the Pacific Northwest Waterways Association (PNWA).

In an interview on WJ Talk, Pacific Northwest Waterways Association Executive Director Neil Maunu said the trade group represents more than 150 members across Oregon, Washington and Idaho, including ports, tug and barge operators, terminal operators and environmental consultants. The association focuses on federal advocacy tied to navigation infrastructure such as dredging, jetties and locks.

Maunu described the system as a “high lift” inland waterway, with eight locks and dams enabling navigation 465 miles inland to Lewiston, Idaho. The locks average 100–110 feet of lift, among the highest in the nation. The inland channel is maintained at a 14-foot draft, while the lower Columbia River channel supports deep-draft vessels at 43 feet.

The system moves a range of commodities, including wheat, fuels and wood products. The region serves as the nation’s leading export gateway for wheat, handling roughly 30 million tons annually.
A key issue for PNWA is the long-term management of dredged material on the lower Columbia River. The U.S. Army Corps of Engineers is updating its 20-year dredge material management plan, as existing placement sites are becoming limited. One proposed solution involves in-water placement structures designed to support habitat while maintaining channel depth.

Maunu said the approach is environmentally beneficial but raises questions about cost-sharing. PNWA is advocating for full federal funding, arguing the work qualifies as operations and maintenance rather than new construction.

Litigation over the four lower Snake River dams also continues to shape the system’s outlook. Environmental groups, tribes and states have challenged federal biological opinions under the Endangered Species Act, arguing the dams harm salmon and steelhead populations.

Recent court proceedings have included requests for increased spill and changes to river operations. Maunu said such measures could affect navigation safety and reliability. While a federal judge ordered limited operational changes, the broader case is expected to continue.

Beyond regulatory issues, PNWA members are also contending with market uncertainty. Maunu pointed to declining container volumes at some coastal ports and the effects of tariffs and trade policies. Fuel costs, particularly diesel prices in Washington state, are adding pressure across the supply chain.

Farmers in the region, especially wheat producers, are facing tight margins while competing globally. Higher input costs for fuel and fertilizer are further constraining profitability, even as barge transportation remains one of the most efficient shipping modes.

Maunu said PNWA’s role includes educating policymakers and coordinating advocacy efforts. The group plans to bring members to Washington, D.C., for meetings with lawmakers to discuss infrastructure funding and regulatory priorities.

Despite the challenges, Maunu said regional stakeholders remain aligned on maintaining the system. He emphasized the interconnected nature of the river network, noting that conditions upstream affect operations downstream.