US Bridges

I-93 SB over NH112 Nhrr

Fair

Grafton County, New Hampshire · 0.27 NE Lincoln Tl · Structure no. 028401740016200

Built
1972
53 years old, rebuilt 2011
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
161 ft
1 main span
Daily traffic
10,539
2023 count
Owner
State
State Highway Agency

About this bridge

I-93 SB over NH112 Nhrr is a steel stringer/multi-beam or girder carrying I-93 SB over NH112 Nhrr in Grafton County, New Hampshire. It was built in 1972 and reconstructed in 2011, so it is 53 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 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 10,539 vehicles a day, roughly 10% of them trucks, projected to reach 15,597 by 2043. The structure is 161 ft (49.1 m) long and 63 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-93 SB
CrossesNH112 Nhrr
Location0.27 NE Lincoln Tl
RouteInterstate 93
CountyGrafton County
StateNew Hampshire
Coordinates44.03329, -71.67999
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 inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating57.4 US tons
Inventory rating34.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length161 ft (49.1 m)
Longest span153 ft (46.6 m)
Deck width63 ft (19.2 m)
Roadway width58 ft (17.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,539 (2023)
Projected traffic15,597 by 2043
Trucks10%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and railroad
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 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 NH112 Nhrr built?

It was built in 1972, making it 53 years old in 2025. It was reconstructed in 2011.

What condition is I-93 SB over NH112 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 April 2023.

How much traffic does I-93 SB over NH112 Nhrr carry?

About 10,539 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is I-93 SB over NH112 Nhrr?

The structure is 161 ft (49.1 m) long with a longest span of 153 ft (46.6 m) and a deck 63 ft wide.

Who owns I-93 SB over NH112 Nhrr?

It is owned by the State Highway Agency.