Low clearance bridges on New Hampshire interstates and US highways

14 spots where an interstate or US highway in New Hampshire has less than 16 ft of clearance. The lowest is 11 ft 11 in on US-3, 4.3 mi FM Bridgewater TL. 1 is under 14 ft and 3 under 15 ft.

Posted signs and your permit come first. These are the clearances New Hampshire reported to the federal National Bridge Inventory in 2025. Repaving, snow and new work can lower them.

Map of New Hampshire with a pin on each low spot.
Hover a pin to read it, tap it to find it in the list. © Mapbox © OpenStreetMap

I-89 · 1 under 16 ft

ClearanceWhereCounty
15 ft 8 inUnder Jewett Road · 1.8 mi E Junction 202 · MapMerrimack County

I-93 · 3 under 16 ft

ClearanceWhereCounty
15 ft 0 inUnder NH102 · 0.7 mi N Derry T / L · MapRockingham County
15 ft 8 inUnder US 302 NH 18 NH116 · 2.1 mi Sugarhill TL · MapGrafton County
15 ft 11 inUnder North Ashland Road · .3 mi from Holderness · MapGrafton County

I-293 · 2 under 16 ft

ClearanceWhereCounty
14 ft 11 inUnder Huse Road · 1.3 mi E Junction Rte 28 · MapHillsborough County
15 ft 9 inUnder I-93 NB Off Ramp · .1 mi E Junction Rte .3 · MapHillsborough County

US-1 Bypass · 4 under 16 ft

ClearanceWhereCounty
15 ft 5 inUnder NH 33 · 0.6 mi from Junction RT 1 · MapRockingham County
15 ft 5 inUnder Woodbury Avenue · 0.6 mi from Maine SL · MapRockingham County
15 ft 6 inUnder Islington Street · 1.0 mi from Junction US 1 · MapRockingham County
15 ft 8 inUnder Maplewood Avenue · .8 mi from Junction NH 16 · MapRockingham County

US-3 · 2 under 16 ft

ClearanceWhereCounty
11 ft 11 inOver Baker River · 4.3 mi FM Bridgewater TL · MapGrafton County
15 ft 1 inUnder I-93 Fee Turnpike · 1.2 mi No of Junction RT 3-A · MapMerrimack County

US-202 · 2 under 16 ft

ClearanceWhereCounty
14 ft 8 inUnder Center Road · 2.2 mi W Henniker T / L · MapHillsborough County
15 ft 10 inUnder I-89 NB · 1.9 So Junction RT 127 · MapMerrimack County