US Bridges

I-93 SB on Ramp over I-93

Fair

Grafton County, New Hampshire · 4.9 MI Lincoln Tl · Structure no. 008701280010400

Built
1959
66 years old, rebuilt 1991
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
281 ft
4 main spans
Daily traffic
2,646
2023 count
Owner
State
State Highway Agency

About this bridge

I-93 SB on Ramp over I-93 is a steel continuous stringer/multi-beam or girder carrying I-93 SB on Ramp over I-93 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 2,646 vehicles a day, roughly 7% of them trucks, projected to reach 3,916 by 2043. The structure is 281 ft (85.6 m) long and 30 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-93 SB on Ramp
CrossesI-93
Location4.9 MI Lincoln Tl
RouteU.S. Route 3
CountyGrafton County
StateNew Hampshire
Coordinates44.19876, -71.6816
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 rating80.2 US tons
Inventory rating48.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length281 ft (85.6 m)
Longest span81 ft (24.7 m)
Deck width30 ft (9.2 m)
Roadway width27 ft (8.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,646 (2023)
Projected traffic3,916 by 2043
Trucks7%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkNon-Interstate 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 on Ramp over I-93 built?

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

What condition is I-93 SB on Ramp over I-93 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 on Ramp over I-93 carry?

About 2,646 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is I-93 SB on Ramp over I-93?

The structure is 281 ft (85.6 m) long with a longest span of 81 ft (24.7 m) and a deck 30 ft wide.

Who owns I-93 SB on Ramp over I-93?

It is owned by the State Highway Agency.