US Bridges

I-93 NB over US 3

Good

Grafton County, New Hampshire · 0.9 MI from Holderness Tl · Structure no. 021601490016000

Built
1964
61 years old, rebuilt 1993
Condition
Good
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
93 ft
1 main span
Daily traffic
10,585
2023 count
Owner
State
State Highway Agency

About this bridge

I-93 NB over US 3 is a steel stringer/multi-beam or girder carrying I-93 NB over US 3 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 10,585 vehicles a day, roughly 9% of them trucks, projected to reach 15,665 by 2043. The structure is 93 ft (28.4 m) long and 42 ft wide.

Location

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CarriesI-93 NB
CrossesUS 3
Location0.9 MI from Holderness Tl
RouteInterstate 93
CountyGrafton County
StateNew Hampshire
Coordinates43.77978, -71.67826
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75.8 US tons
Inventory rating45.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length93 ft (28.4 m)
Longest span84 ft (25.5 m)
Deck width42 ft (12.9 m)
Roadway width39 ft (11.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,585 (2023)
Projected traffic15,665 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 NB over US 3 built?

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

What condition is I-93 NB over US 3 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 NB over US 3 carry?

About 10,585 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is I-93 NB over US 3?

The structure is 93 ft (28.4 m) long with a longest span of 84 ft (25.5 m) and a deck 42 ft wide.

Who owns I-93 NB over US 3?

It is owned by the State Highway Agency.