US Bridges

NH102 over I-93

Good

Rockingham County, New Hampshire · 0.7 MI N Derry T/L · Structure no. 015401490010600

Built
2018
7 years old
Condition
Good
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
339 ft
2 main spans
Daily traffic
34,331
2023 count
Owner
State
State Highway Agency

About this bridge

NH102 over I-93 is a steel continuous stringer/multi-beam or girder carrying NH102 over I-93 in Rockingham County, New Hampshire. It was built in 2018, so it is 7 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 34,331 vehicles a day, roughly 7% of them trucks, projected to reach 50,809 by 2043. The structure is 339 ft (103.2 m) long and 114 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesNH102
CrossesI-93
Location0.7 MI N Derry T/L
RouteState Highway 102
CountyRockingham County
StateNew Hampshire
Coordinates42.86983, -71.34069
Functional classUrban Other Principal Arterial

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 inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating76.2 US tons
Inventory rating58.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHL 93
Structure length339 ft (103.2 m)
Longest span189 ft (57.6 m)
Deck width114 ft (34.7 m)
Roadway width48 ft (14.6 m)
Vertical clearance over deck99 ft (30.2 m)

Traffic and service

Average daily traffic34,331 (2023)
Projected traffic50,809 by 2043
Trucks7%
Lanes on structure7
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemYes

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 NH102 over I-93 built?

It was built in 2018, making it 7 years old in 2025.

What condition is NH102 over I-93 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 June 2023.

How much traffic does NH102 over I-93 carry?

About 34,331 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is NH102 over I-93?

The structure is 339 ft (103.2 m) long with a longest span of 189 ft (57.6 m) and a deck 114 ft wide.

Who owns NH102 over I-93?

It is owned by the State Highway Agency.