US Bridges

I-93 SB over NH141

Fair

Grafton County, New Hampshire · 4.2 MI Sugarhill Tl · Structure no. 008701160010900

Built
1959
66 years old, rebuilt 1991
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
67 ft
1 main span
Daily traffic
2,447
2023 count
Owner
State
State Highway Agency

About this bridge

I-93 SB over NH141 is a steel stringer/multi-beam or girder carrying I-93 SB over NH141 in Grafton County, New Hampshire. It was built in 1959 and reconstructed in 1991, so it is 66 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 2,447 vehicles a day, roughly 9% of them trucks, projected to reach 3,621 by 2043. The structure is 67 ft (20.4 m) long and 58 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

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CarriesI-93 SB
CrossesNH141
Location4.2 MI Sugarhill Tl
RouteInterstate 93
CountyGrafton County
StateNew Hampshire
Coordinates44.20251, -71.69083
Functional classRural Principal Arterial - Interstate

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 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 rating110.1 US tons
Inventory rating62.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length67 ft (20.4 m)
Longest span62 ft (18.9 m)
Deck width58 ft (17.6 m)
Roadway width56 ft (17 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,447 (2023)
Projected traffic3,621 by 2043
Trucks9%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed6.2 mi (10 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 SB over NH141 built?

It was built in 1959, making it 66 years old in 2025. It was reconstructed in 1991.

What condition is I-93 SB over NH141 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 May 2023.

How much traffic does I-93 SB over NH141 carry?

About 2,447 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is I-93 SB over NH141?

The structure is 67 ft (20.4 m) long with a longest span of 62 ft (18.9 m) and a deck 58 ft wide.

Who owns I-93 SB over NH141?

It is owned by the State Highway Agency.