US Bridges

I-93 SB on Ramp over Nhrr

Good

Grafton County, New Hampshire · 0.1 MI from Nh 3A & 25 · Structure no. 021601450014400

Built
1964
61 years old, rebuilt 1993
Condition
Good
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
114 ft
3 main spans
Daily traffic
3,491
2023 count
Owner
State
State Highway Agency

About this bridge

I-93 SB on Ramp over Nhrr is a steel continuous stringer/multi-beam or girder carrying I-93 SB on Ramp over Nhrr 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 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 3,491 vehicles a day, roughly 9% of them trucks, projected to reach 5,166 by 2043. The structure is 114 ft (34.7 m) long and 35 ft wide.

CarriesI-93 SB on Ramp
CrossesNhrr
Location0.1 MI from Nh 3A & 25
Coordinates43.77031, -71.68317
Functional classUrban 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
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Last inspectionMarch 2023
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 rating77.1 US tons
Inventory rating46 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length114 ft (34.7 m)
Longest span45 ft (13.7 m)
Deck width35 ft (10.6 m)
Roadway width31 ft (9.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,491 (2023)
Projected traffic5,166 by 2043
Trucks9%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
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 on Ramp over Nhrr built?

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

What condition is I-93 SB on Ramp over Nhrr 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 March 2023.

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

About 3,491 vehicles per day (2023 count), of which roughly 9% are trucks.

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

The structure is 114 ft (34.7 m) long with a longest span of 45 ft (13.7 m) and a deck 35 ft wide.

Who owns I-93 SB on Ramp over Nhrr?

It is owned by the State Highway Agency.