US Bridges

I-93 SB over NH111

Good

Rockingham County, New Hampshire · 3 MI South of Derry Tl · Structure no. 028001370010200

Built
2014
11 years old
Condition
Good
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
410 ft
2 main spans
Daily traffic
42,082
2023 count
Owner
State
State Highway Agency

About this bridge

I-93 SB over NH111 is a steel continuous stringer/multi-beam or girder carrying I-93 SB over NH111 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 42,082 vehicles a day, roughly 25% of them trucks, projected to reach 62,281 by 2043. The structure is 410 ft (124.9 m) long and 75 ft wide.

Location

Open in Google Maps
CarriesI-93 SB
CrossesNH111
Location3 MI South of Derry Tl
RouteInterstate 0I93
CountyRockingham County
StateNew Hampshire
Coordinates42.80914, -71.27259
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 geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75.6 US tons
Inventory rating45.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHL 93
Structure length410 ft (124.9 m)
Longest span230 ft (70.1 m)
Deck width75 ft (22.9 m)
Roadway width71 ft (21.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic42,082 (2023)
Projected traffic62,281 by 2043
Trucks25%
Lanes on structure4
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 SB over NH111 built?

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

What condition is I-93 SB over NH111 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 NH111 carry?

About 42,082 vehicles per day (2023 count), of which roughly 25% are trucks.

How long is I-93 SB over NH111?

The structure is 410 ft (124.9 m) long with a longest span of 230 ft (70.1 m) and a deck 75 ft wide.

Who owns I-93 SB over NH111?

It is owned by the State Highway Agency.