US Bridges

Oak Street over Sugar River

Good

Sullivan County, New Hampshire · 0.4 MI FR No. Newport RD · Structure no. 019201030013600

Built
2019
6 years old
Condition
Good
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
125 ft
1 main span
Daily traffic
585
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Oak Street over Sugar River is a steel stringer/multi-beam or girder carrying Oak Street over Sugar River in Sullivan County, New Hampshire. It was built in 2019, so it is 6 years old, younger 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 9 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 585 vehicles a day, roughly 4% of them trucks, projected to reach 865 by 2043. The structure is 125 ft (38.1 m) long and 27 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesOak Street
CrossesSugar River
Location0.4 MI FR No. Newport RD
Coordinates43.38657, -72.20728
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck9 ExcellentNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure9 ExcellentNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating65 US tons
Inventory rating50.2 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length125 ft (38.1 m)
Longest span122 ft (37.2 m)
Deck width27 ft (8.2 m)
Roadway width19 ft (5.8 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic585 (2023)
Projected traffic865 by 2043
Trucks4%
Lanes on structure2
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible 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 Oak Street over Sugar River built?

It was built in 2019, making it 6 years old in 2025.

What condition is Oak Street 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 July 2024.

How much traffic does Oak Street over Sugar River carry?

About 585 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Oak Street over Sugar River?

The structure is 125 ft (38.1 m) long with a longest span of 122 ft (37.2 m) and a deck 27 ft wide.

Who owns Oak Street over Sugar River?

It is owned by the City or Municipal Highway Agency.