US Bridges

I-93 Parkway NB over I-93(RAMP 3S-F)

Good

Grafton County, New Hampshire · 4.6 MI No Woodstock Tl · Structure no. 014801410010400

Built
1986
39 years old
Condition
Good
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
104 ft
1 main span
Daily traffic
5,410
2023 count
Owner
State
State Highway Agency

About this bridge

I-93 Parkway NB over I-93(RAMP 3S-F) is a steel stringer/multi-beam or girder carrying I-93 Parkway NB over I-93(RAMP 3S-F) 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 5,410 vehicles a day, roughly 9% of them trucks, projected to reach 8,006 by 2043. The structure is 104 ft (31.6 m) long and 41 ft wide. If it were closed, the detour would be 29.8 mi (48 km).

Location

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CarriesI-93 Parkway NB
CrossesI-93(RAMP 3S-F)
Location4.6 MI No Woodstock Tl
RouteInterstate 93
CountyGrafton County
StateNew Hampshire
Coordinates44.10489, -71.68319
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 geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating80.1 US tons
Inventory rating48.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length104 ft (31.6 m)
Longest span97 ft (29.6 m)
Deck width41 ft (12.5 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,410 (2023)
Projected traffic8,006 by 2043
Trucks9%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed29.8 mi (48 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 Parkway NB over I-93(RAMP 3S-F) built?

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

What condition is I-93 Parkway NB over I-93(RAMP 3S-F) 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 Parkway NB over I-93(RAMP 3S-F) carry?

About 5,410 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is I-93 Parkway NB over I-93(RAMP 3S-F)?

The structure is 104 ft (31.6 m) long with a longest span of 97 ft (29.6 m) and a deck 41 ft wide.

Who owns I-93 Parkway NB over I-93(RAMP 3S-F)?

It is owned by the State Highway Agency.