US Bridges

Nh 11 over Sugar River

Good

Sullivan County, New Hampshire · 6.1 Mi. from New London T · Structure no. 024700710008700

Built
1957
68 years old
Condition
Good
inspected April 2023
Type
Frame
Concrete
Length
41 ft
1 main span
Daily traffic
5,968
2023 count
Owner
State
State Highway Agency

About this bridge

Nh 11 over Sugar River is a concrete frame carrying Nh 11 over Sugar River in Sullivan County, New Hampshire. It was built in 1957, 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 5,968 vehicles a day, roughly 7% of them trucks, projected to reach 8,832 by 2043. The structure is 41 ft (12.5 m) long and 44 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesNh 11
CrossesSugar River
Location6.1 Mi. from New London T
RouteState Highway 11
CountySullivan County
StateNew Hampshire
Coordinates43.37818, -72.12102
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 protection6 SatisfactoryStructural elements show some minor deterioration.
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating74.2 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length41 ft (12.5 m)
Longest span36 ft (11 m)
Deck width44 ft (13.3 m)
Roadway width40 ft (12.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,968 (2023)
Projected traffic8,832 by 2043
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 km)
TollOn a free road
National Highway SystemYes

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 11 over Sugar River built?

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

What condition is Nh 11 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 Nh 11 over Sugar River carry?

About 5,968 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is Nh 11 over Sugar River?

The structure is 41 ft (12.5 m) long with a longest span of 36 ft (11 m) and a deck 44 ft wide.

Who owns Nh 11 over Sugar River?

It is owned by the State Highway Agency.