US Bridges

Nh 11 over Sugar River

Fair

Sullivan County, New Hampshire · 4.0 MI New London Tl · Structure no. 024701030010000

Built
1957
68 years old
Condition
Fair
inspected April 2023
Type
Frame
Concrete
Length
79 ft
1 main span
Daily traffic
7,207
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 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 7,207 vehicles a day, roughly 7% of them trucks, projected to reach 10,666 by 2043. The structure is 79 ft (24.1 m) long and 38 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesNh 11
CrossesSugar River
Location4.0 MI New London Tl
RouteState Highway 11
CountySullivan County
StateNew Hampshire
Coordinates43.38707, -72.08789
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
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 evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be 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 rating68 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length79 ft (24.1 m)
Longest span70 ft (21.3 m)
Deck width38 ft (11.6 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,207 (2023)
Projected traffic10,666 by 2043
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 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 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 2023.

How much traffic does Nh 11 over Sugar River carry?

About 7,207 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is Nh 11 over Sugar River?

The structure is 79 ft (24.1 m) long with a longest span of 70 ft (21.3 m) and a deck 38 ft wide.

Who owns Nh 11 over Sugar River?

It is owned by the State Highway Agency.