US Bridges

I-93 SB over NH111A

Good

Rockingham County, New Hampshire · .7/10 of Mil West Nh 111 · Structure no. 028001360009000

Built
2014
11 years old
Condition
Good
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
135 ft
1 main span
Daily traffic
47,252
2023 count
Owner
State
State Highway Agency

About this bridge

I-93 SB over NH111A is a steel stringer/multi-beam or girder carrying I-93 SB over NH111A in Rockingham County, New Hampshire. It was built in 2014, so it is 11 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 47,252 vehicles a day, roughly 25% of them trucks, projected to reach 69,932 by 2043. The structure is 135 ft (41.1 m) long and 99 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesI-93 SB
CrossesNH111A
Location.7/10 of Mil West Nh 111
RouteInterstate 93
CountyRockingham County
StateNew Hampshire
Coordinates42.79975, -71.27196
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.
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 geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating82.8 US tons
Inventory rating49.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length135 ft (41.1 m)
Longest span111 ft (33.8 m)
Deck width99 ft (30.2 m)
Roadway width95 ft (29 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic47,252 (2023)
Projected traffic69,932 by 2043
Trucks25%
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 SB over NH111A built?

It was built in 2014, making it 11 years old in 2025.

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

About 47,252 vehicles per day (2023 count), of which roughly 25% are trucks.

How long is I-93 SB over NH111A?

The structure is 135 ft (41.1 m) long with a longest span of 111 ft (33.8 m) and a deck 99 ft wide.

Who owns I-93 SB over NH111A?

It is owned by the State Highway Agency.