Lewiston Hill Port of Entry

Located 7 miles north of Lewiston, Southbound side of US-95.

Marsing Port of Entry

Located 6 miles south of the SH-55/US-95 junction.


The Legal Weight Calculator will help determine the legal gross, bridge and axle weight for a truck configuration. Please review instructions above for information on how to use the calculator in the Excel spreadsheet format or watch the instructional video.



The weight of load for inch width of tire for the front steer axle may not exceed the manufacturer’s load rating per tire or the load rating of the axle or twenty thousand (20,000) pounds per axle whichever is less.

All other tires the capacity can be calculated by using 600 lbs per tire width and shall not exceed the manufacturer’s load rating, whichever is less.