US Bridges

I-93(RAMP 3N-F) over US 3

Good

Grafton County, New Hampshire · 3.7 MI from Woodstock Tl · Structure no. 014801590010200

Built
1986
39 years old
Condition
Good
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
149 ft
1 main span
Daily traffic
402
2023 count
Owner
State
State Highway Agency

About this bridge

I-93(RAMP 3N-F) over US 3 is a steel stringer/multi-beam or girder carrying I-93(RAMP 3N-F) over US 3 in Grafton County, New Hampshire. It was built in 1986, so it is 39 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 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 402 vehicles a day, projected to reach 594 by 2043. The structure is 149 ft (45.4 m) long and 31 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-93(RAMP 3N-F)
CrossesUS 3
Location3.7 MI from Woodstock Tl
CountyGrafton County
StateNew Hampshire
Coordinates44.09134, -71.6837
Functional classRural 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 inspectionMay 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 rating82.5 US tons
Inventory rating49.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length149 ft (45.4 m)
Longest span140 ft (42.7 m)
Deck width31 ft (9.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic402 (2023)
Projected traffic594 by 2043
Trucks0%
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 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(RAMP 3N-F) over US 3 built?

It was built in 1986, making it 39 years old in 2025.

What condition is I-93(RAMP 3N-F) 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 May 2023.

How much traffic does I-93(RAMP 3N-F) over US 3 carry?

About 402 vehicles per day (2023 count).

How long is I-93(RAMP 3N-F) over US 3?

The structure is 149 ft (45.4 m) long with a longest span of 140 ft (42.7 m) and a deck 31 ft wide.

Who owns I-93(RAMP 3N-F) over US 3?

It is owned by the State Highway Agency.