Marine Highways
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Designated U.S. Marine Highway Routes
West Coast M-5: Pacific Ocean Coastal Waters M-5AK: Alaska Coastline M-11: Alaska Coastal Waters M-84: Columbia, Willamette, and Snake RiversM-580: San Joaquin and Sacramento Rivers
M-A1: Matanuska and Susitna Rivers
...Frequently Asked Questions - U.S. Marine Highway Program (USMHP)
General Questions about USMHP FundingWhen is the application deadline?
The application deadline for FY 2025 USMHP...