US Bridges

I-93 SB over I-93 NB Ramps

Fair

Grafton County, New Hampshire · 0.4 MI from Holderness Tl · Structure no. 021601450014700

Built
1964
61 years old, rebuilt 1993
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
187 ft
3 main spans
Daily traffic
11,571
2023 count
Owner
State
State Highway Agency

About this bridge

I-93 SB over I-93 NB Ramps is a steel stringer/multi-beam or girder carrying I-93 SB over I-93 NB Ramps in Grafton County, New Hampshire. It was built in 1964 and reconstructed in 1993, so it is 61 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 11,571 vehicles a day, roughly 9% of them trucks, projected to reach 17,125 by 2043. The structure is 187 ft (57 m) long and 42 ft wide.

Location

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CarriesI-93 SB
CrossesI-93 NB Ramps
Location0.4 MI from Holderness Tl
RouteInterstate 93
CountyGrafton County
StateNew Hampshire
Coordinates43.77196, -71.68294
Functional classUrban 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 inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating91.8 US tons
Inventory rating55.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length187 ft (57 m)
Longest span94 ft (28.7 m)
Deck width42 ft (12.9 m)
Roadway width39 ft (11.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,571 (2023)
Projected traffic17,125 by 2043
Trucks9%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
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 I-93 NB Ramps built?

It was built in 1964, making it 61 years old in 2025. It was reconstructed in 1993.

What condition is I-93 SB over I-93 NB Ramps 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 March 2023.

How much traffic does I-93 SB over I-93 NB Ramps carry?

About 11,571 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is I-93 SB over I-93 NB Ramps?

The structure is 187 ft (57 m) long with a longest span of 94 ft (28.7 m) and a deck 42 ft wide.

Who owns I-93 SB over I-93 NB Ramps?

It is owned by the State Highway Agency.