US Route 1A Bridge
Fixed · FixedUS Route 1A Bridge is a fixed bridge with 11 ft of vertical clearance, measured to mean high water.
Clearances are from NOAA chart US5PSMCC, measured to mean high water. Actual clearance is lower whenever the water stands above that level, as at higher tides and in storm surge. Always confirm against your vessel's air draft and the posted clearance gauge before transiting.
Pathr nautical charts
US Route 1A Bridge on the chart
Find the bridge and its charted vertical clearance in one view. Select a pin to compare nearby bridges, see open and closed clearances where charted, and open its operating details.
Frequently asked
What is the clearance under US Route 1A Bridge?+
US Route 1A Bridge is a fixed bridge with 11 ft of vertical clearance, measured to mean high water. These figures are from NOAA chart data. Real clearance drops whenever the water stands above the level they are measured to, so leave a margin for your air draft.
Tides & conditions at this crossing
Clearance under US Route 1A Bridge shrinks as the water rises. Check the water level and marine conditions at the nearest NOAA station, Portsmouth (2 mi away).
