US Bridges

Nh 31 over Ashuelot River

Fair

Sullivan County, New Hampshire · 1.85 Mi. S. Goshen Tl · Structure no. 026500930015200

Built
1935
90 years old, rebuilt 1983
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
33 ft
1 main span
Daily traffic
494
2023 count
Owner
State
State Highway Agency

About this bridge

Nh 31 over Ashuelot River is a steel stringer/multi-beam or girder carrying Nh 31 over Ashuelot River in Sullivan County, New Hampshire. It was built in 1935 and reconstructed in 1983, so it is 90 years old, older than the New Hampshire average of 56.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 494 vehicles a day, roughly 10% of them trucks, projected to reach 731 by 2043. The structure is 33 ft (10.1 m) long and 33 ft wide. If it were closed, the detour would be 13 mi (21 km).

Location

Open in Google Maps
CarriesNh 31
CrossesAshuelot River
Location1.85 Mi. S. Goshen Tl
RouteState Highway 31
CountySullivan County
StateNew Hampshire
Coordinates43.22552, -72.11908
Functional classRural Minor Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating35.5 US tons
Inventory rating21.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length33 ft (10.1 m)
Longest span28 ft (8.5 m)
Deck width33 ft (10.2 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic494 (2023)
Projected traffic731 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed13 mi (21 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 Nh 31 over Ashuelot River built?

It was built in 1935, making it 90 years old in 2025. It was reconstructed in 1983.

What condition is Nh 31 over Ashuelot River in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in April 2024.

How much traffic does Nh 31 over Ashuelot River carry?

About 494 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Nh 31 over Ashuelot River?

The structure is 33 ft (10.1 m) long with a longest span of 28 ft (8.5 m) and a deck 33 ft wide.

Who owns Nh 31 over Ashuelot River?

It is owned by the State Highway Agency.