US Bridges

I-93 NB over NH127

Good

Belknap County, New Hampshire · 2.2MI from Tilton-Sanborn · Structure no. 023101250007500

Built
1962
63 years old, rebuilt 1987
Condition
Good
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
111 ft
3 main spans
Daily traffic
15,080
2023 count
Owner
State
State Highway Agency

About this bridge

I-93 NB over NH127 is a steel continuous stringer/multi-beam or girder carrying I-93 NB over NH127 in Belknap County, New Hampshire. It was built in 1962 and reconstructed in 1987, so it is 63 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 15,080 vehicles a day, roughly 9% of them trucks, projected to reach 22,318 by 2043. The structure is 111 ft (33.8 m) long and 48 ft wide. If it were closed, the detour would be 14.3 mi (23 km).

Location

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CarriesI-93 NB
CrossesNH127
Location2.2MI from Tilton-Sanborn
RouteInterstate 93
CountyBelknap County
StateNew Hampshire
Coordinates43.50474, -71.61531
Functional classRural Principal Arterial - Interstate

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.2 US tons
Inventory rating35.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length111 ft (33.8 m)
Longest span43 ft (13.1 m)
Deck width48 ft (14.6 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,080 (2023)
Projected traffic22,318 by 2043
Trucks9%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed14.3 mi (23 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 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)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-93 NB over NH127 built?

It was built in 1962, making it 63 years old in 2025. It was reconstructed in 1987.

What condition is I-93 NB over NH127 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 I-93 NB over NH127 carry?

About 15,080 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is I-93 NB over NH127?

The structure is 111 ft (33.8 m) long with a longest span of 43 ft (13.1 m) and a deck 48 ft wide.

Who owns I-93 NB over NH127?

It is owned by the State Highway Agency.