US Bridges

NH101 EB over Bridge Street

Fair

Hillsborough County, New Hampshire · 1.2 MI W. JCT RTE 28 Byp · Structure no. 016101280012700

Built
1961
64 years old, rebuilt 1977
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
60 ft
1 main span
Daily traffic
19,964
2023 count
Owner
State
State Highway Agency

About this bridge

NH101 EB over Bridge Street is a steel stringer/multi-beam or girder carrying NH101 EB over Bridge Street in Hillsborough County, New Hampshire. It was built in 1961 and reconstructed in 1977, so it is 64 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 19,964 vehicles a day, roughly 8% of them trucks, projected to reach 29,546 by 2043. The structure is 60 ft (18.3 m) long and 61 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesNH101 EB
CrossesBridge Street
Location1.2 MI W. JCT RTE 28 Byp
RouteState Highway 101
Coordinates42.99374, -71.41525
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75.4 US tons
Inventory rating45.1 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length60 ft (18.3 m)
Longest span54 ft (16.5 m)
Deck width61 ft (18.6 m)
Roadway width57 ft (17.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic19,964 (2023)
Projected traffic29,546 by 2043
Trucks8%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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)
NavigationNot applicable (no waterway)

Frequently asked questions

When was NH101 EB over Bridge Street built?

It was built in 1961, making it 64 years old in 2025. It was reconstructed in 1977.

What condition is NH101 EB over Bridge Street 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 NH101 EB over Bridge Street carry?

About 19,964 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is NH101 EB over Bridge Street?

The structure is 60 ft (18.3 m) long with a longest span of 54 ft (16.5 m) and a deck 61 ft wide.

Who owns NH101 EB over Bridge Street?

It is owned by the State Highway Agency.