US Bridges

NH117 over Gale River

Good

Grafton County, New Hampshire · 0.2 MI E Lisbon Tl · Structure no. 008700410012100

Built
1974
51 years old
Condition
Good
inspected June 2023
Type
Frame
Concrete
Length
102 ft
1 main span
Daily traffic
1,727
2023 count
Owner
State
State Highway Agency

About this bridge

NH117 over Gale River is a concrete frame carrying NH117 over Gale River in Grafton County, New Hampshire. It was built in 1974, so it is 51 years old, younger than the New Hampshire average of 56.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,727 vehicles a day, roughly 4% of them trucks, projected to reach 2,555 by 2043. The structure is 102 ft (31.1 m) long and 40 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesNH117
CrossesGale River
Location0.2 MI E Lisbon Tl
RouteState Highway 117
CountyGrafton County
StateNew Hampshire
Coordinates44.23101, -71.75566
Functional classRural Major Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating50.4 US tons
Inventory rating36 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length102 ft (31.1 m)
Longest span92 ft (28 m)
Deck width40 ft (12.3 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,727 (2023)
Projected traffic2,555 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$314,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was NH117 over Gale River built?

It was built in 1974, making it 51 years old in 2025.

What condition is NH117 over Gale River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in June 2023.

How much traffic does NH117 over Gale River carry?

About 1,727 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is NH117 over Gale River?

The structure is 102 ft (31.1 m) long with a longest span of 92 ft (28 m) and a deck 40 ft wide.

Who owns NH117 over Gale River?

It is owned by the State Highway Agency.