Federal authorities are considering reversing an 80-year-old decision and designating the Salmon River as navigable.
The Lewiston Tribune reports the proposed change would add to the list of regulated activities on the river.
People currently need a Clean Water Act permit to use the river when discharging dredge or fill material.
U.S. Army Corps of Engineers Brig. Gen. Scott A. Spellmon is expected to make a decision on the change in May.
Officials are meeting with area stakeholders to inform them of the proposal.
Lewis County Commissioners expressed concern with the possible added regulations.
The Idaho Conservation League's petition to re-designate the river says there are modern ways to navigate the waterway.
The group also notes historical uses of the river, like transporting materials.