US Bridges

I-93 NB over NH111A

Good

Rockingham County, New Hampshire · .2 M East of Armstrong RD · Structure no. 028001370009200

Built
2011
14 years old
Condition
Good
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
139 ft
1 main span
Daily traffic
52,370
2023 count
Owner
State
State Highway Agency

About this bridge

I-93 NB over NH111A is a steel stringer/multi-beam or girder carrying I-93 NB over NH111A in Rockingham County, New Hampshire. It was built in 2011, so it is 14 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 52,370 vehicles a day, roughly 10% of them trucks, projected to reach 77,507 by 2043. The structure is 139 ft (42.4 m) long and 87 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

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CarriesI-93 NB
CrossesNH111A
Location.2 M East of Armstrong RD
RouteInterstate 0I93
CountyRockingham County
StateNew Hampshire
Coordinates42.80028, -71.27116
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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating76.5 US tons
Inventory rating45.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length139 ft (42.4 m)
Longest span132 ft (40.2 m)
Deck width87 ft (26.5 m)
Roadway width83 ft (25.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic52,370 (2023)
Projected traffic77,507 by 2043
Trucks10%
Lanes on structure5
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed9.9 mi (16 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 NB over NH111A built?

It was built in 2011, making it 14 years old in 2025.

What condition is I-93 NB over NH111A 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 NB over NH111A carry?

About 52,370 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is I-93 NB over NH111A?

The structure is 139 ft (42.4 m) long with a longest span of 132 ft (40.2 m) and a deck 87 ft wide.

Who owns I-93 NB over NH111A?

It is owned by the State Highway Agency.