US Bridges

I-93 NB over Nh 28

Good

Rockingham County, New Hampshire · 1.7 MI S Manchester Tl · Structure no. 015400990016100

Built
2014
11 years old
Condition
Good
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
178 ft
1 main span
Daily traffic
36,675
2023 count
Owner
State
State Highway Agency

About this bridge

I-93 NB over Nh 28 is a steel stringer/multi-beam or girder carrying I-93 NB over Nh 28 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 36,675 vehicles a day, roughly 9% of them trucks, projected to reach 54,279 by 2043. The structure is 178 ft (54.3 m) long and 75 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

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CarriesI-93 NB
CrossesNh 28
Location1.7 MI S Manchester Tl
RouteInterstate 93
CountyRockingham County
StateNew Hampshire
Coordinates42.91651, -71.37122
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 inspectionJune 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 rating75.2 US tons
Inventory rating45 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length178 ft (54.3 m)
Longest span170 ft (51.8 m)
Deck width75 ft (22.9 m)
Roadway width71 ft (21.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic36,675 (2023)
Projected traffic54,279 by 2043
Trucks9%
Lanes on structure4
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 Nh 28 built?

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

What condition is I-93 NB over Nh 28 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 I-93 NB over Nh 28 carry?

About 36,675 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is I-93 NB over Nh 28?

The structure is 178 ft (54.3 m) long with a longest span of 170 ft (51.8 m) and a deck 75 ft wide.

Who owns I-93 NB over Nh 28?

It is owned by the State Highway Agency.