US Bridges

School Street over Nhrr

Fair

Belknap County, New Hampshire · 0.1 MI from US 3 · Structure no. 025600850004700

Built
1924
101 years old, rebuilt 1992
Condition
Fair
inspected June 2024
Type
Slab
Concrete
Length
25 ft
1 main span
Daily traffic
1,398
2023 count
Owner
State
State Highway Agency

About this bridge

School Street over Nhrr is a concrete slab carrying School Street over Nhrr in Belknap County, New Hampshire. It was built in 1924 and reconstructed in 1992, so it is 101 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 1,398 vehicles a day, roughly 10% of them trucks, projected to reach 2,069 by 2043. The structure is 25 ft (7.6 m) long and 43 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesSchool Street
CrossesNhrr
Location0.1 MI from US 3
RouteState Highway 0
CountyBelknap County
StateNew Hampshire
Coordinates43.44324, -71.58872
Functional classUrban Collector

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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating60.5 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length25 ft (7.6 m)
Longest span21 ft (6.4 m)
Deck width43 ft (13.2 m)
Roadway width31 ft (9.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,398 (2023)
Projected traffic2,069 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesRailroad
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

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 School Street over Nhrr built?

It was built in 1924, making it 101 years old in 2025. It was reconstructed in 1992.

What condition is School Street over Nhrr 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 June 2024.

How much traffic does School Street over Nhrr carry?

About 1,398 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is School Street over Nhrr?

The structure is 25 ft (7.6 m) long with a longest span of 21 ft (6.4 m) and a deck 43 ft wide.

Who owns School Street over Nhrr?

It is owned by the State Highway Agency.