US Bridges

NH103 over Sugar River

Good

Sullivan County, New Hampshire · 0.2 M W Newport T.L. · Structure no. 024700670007800

Built
1957
68 years old, rebuilt 1979
Condition
Good
inspected April 2023
Type
Slab
Concrete Continuous
Length
100 ft
3 main spans
Daily traffic
2,220
2023 count
Owner
State
State Highway Agency

About this bridge

NH103 over Sugar River is a concrete continuous slab carrying NH103 over Sugar River in Sullivan County, New Hampshire. It was built in 1957 and reconstructed in 1979, so it is 68 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 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 2,220 vehicles a day, roughly 4% of them trucks, projected to reach 3,285 by 2043. The structure is 100 ft (30.5 m) long and 44 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesNH103
CrossesSugar River
Location0.2 M W Newport T.L.
RouteState Highway 11
CountySullivan County
StateNew Hampshire
Coordinates43.37294, -72.12485
Functional classRural Minor Arterial

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 inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating84.1 US tons
Inventory rating59.9 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length100 ft (30.5 m)
Longest span36 ft (11 m)
Deck width44 ft (13.5 m)
Roadway width40 ft (12.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,220 (2023)
Projected traffic3,285 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 NH103 over Sugar River built?

It was built in 1957, making it 68 years old in 2025. It was reconstructed in 1979.

What condition is NH103 over Sugar 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 April 2023.

How much traffic does NH103 over Sugar River carry?

About 2,220 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is NH103 over Sugar River?

The structure is 100 ft (30.5 m) long with a longest span of 36 ft (11 m) and a deck 44 ft wide.

Who owns NH103 over Sugar River?

It is owned by the State Highway Agency.