US Bridges

Nh 10 Nh 11 NH103 over Sugar River

Fair

Sullivan County, New Hampshire · 5.4MI from Claremont Tl · Structure no. 019201390010400

Built
1930
95 years old
Condition
Fair
inspected June 2023
Type
Arch - Deck
Concrete
Length
54 ft
1 main span
Daily traffic
10,042
2023 count
Owner
State
State Highway Agency

About this bridge

Nh 10 Nh 11 NH103 over Sugar River is a concrete arch - deck carrying Nh 10 Nh 11 NH103 over Sugar River in Sullivan County, New Hampshire. It was built in 1930, so it is 95 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 5 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 10,042 vehicles a day, roughly 9% of them trucks, projected to reach 14,862 by 2043. The structure is 54 ft (16.5 m) long and 65 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesNh 10 Nh 11 NH103
CrossesSugar River
Location5.4MI from Claremont Tl
RouteState Highway 10
CountySullivan County
StateNew Hampshire
Coordinates43.36309, -72.17216
Functional classRural 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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
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 geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating78 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length54 ft (16.5 m)
Longest span48 ft (14.6 m)
Deck width65 ft (19.7 m)
Roadway width46 ft (14 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,042 (2023)
Projected traffic14,862 by 2043
Trucks9%
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

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusEligible 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 10 Nh 11 NH103 over Sugar River built?

It was built in 1930, making it 95 years old in 2025.

What condition is Nh 10 Nh 11 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 June 2023.

How much traffic does Nh 10 Nh 11 NH103 over Sugar River carry?

About 10,042 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is Nh 10 Nh 11 NH103 over Sugar River?

The structure is 54 ft (16.5 m) long with a longest span of 48 ft (14.6 m) and a deck 65 ft wide.

Who owns Nh 10 Nh 11 NH103 over Sugar River?

It is owned by the State Highway Agency.