US Bridges

Nh 12 NH103 over Sugar River

Fair

Sullivan County, New Hampshire · 3.8 MI from Vermont Sl · Structure no. 004701220009800

Built
1996
29 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
122 ft
1 main span
Daily traffic
6,584
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Nh 12 NH103 over Sugar River is a steel stringer/multi-beam or girder carrying Nh 12 NH103 over Sugar River in Sullivan County, New Hampshire. It was built in 1996, so it is 29 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 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 6,584 vehicles a day, roughly 3% of them trucks, projected to reach 9,744 by 2043. The structure is 122 ft (37.2 m) long and 45 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesNh 12 NH103
CrossesSugar River
Location3.8 MI from Vermont Sl
RouteState Highway 12
CountySullivan County
StateNew Hampshire
Coordinates43.37553, -72.34579
Functional classUrban Minor Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating74.7 US tons
Inventory rating45 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length122 ft (37.2 m)
Longest span118 ft (36 m)
Deck width45 ft (13.6 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,584 (2023)
Projected traffic9,744 by 2043
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
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 12 NH103 over Sugar River built?

It was built in 1996, making it 29 years old in 2025.

What condition is Nh 12 NH103 over Sugar 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 September 2023.

How much traffic does Nh 12 NH103 over Sugar River carry?

About 6,584 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Nh 12 NH103 over Sugar River?

The structure is 122 ft (37.2 m) long with a longest span of 118 ft (36 m) and a deck 45 ft wide.

Who owns Nh 12 NH103 over Sugar River?

It is owned by the City or Municipal Highway Agency.