US Bridges

Main Street over Sugar River

Fair

Sullivan County, New Hampshire · 115 Ft from Garnett ST · Structure no. 024701110009900

Built
1920
105 years old, rebuilt 1992
Condition
Fair
inspected September 2024
Type
Slab
Wood or Timber
Length
30 ft
1 main span
Daily traffic
2,301
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Main Street over Sugar River is a wood or timber slab carrying Main Street over Sugar River in Sullivan County, New Hampshire. It was built in 1920 and reconstructed in 1992, so it is 105 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 2,301 vehicles a day, roughly 4% of them trucks, projected to reach 3,405 by 2043. The structure is 30 ft (9.1 m) long and 32 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesMain Street
CrossesSugar River
Location115 Ft from Garnett ST
Coordinates43.38554, -72.08142
Functional classRural Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2024
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 geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating65 US tons
Inventory rating47 US tons

Structure

Structure typeSlab
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadHS 25 or greater
Structure length30 ft (9.1 m)
Longest span28 ft (8.5 m)
Deck width32 ft (9.8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,301 (2023)
Projected traffic3,405 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Main Street over Sugar River built?

It was built in 1920, making it 105 years old in 2025. It was reconstructed in 1992.

What condition is Main Street 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 2024.

How much traffic does Main Street over Sugar River carry?

About 2,301 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Main Street over Sugar River?

The structure is 30 ft (9.1 m) long with a longest span of 28 ft (8.5 m) and a deck 32 ft wide.

Who owns Main Street over Sugar River?

It is owned by the City or Municipal Highway Agency.