US Bridges

I-93 NB over US 3 Nh 28

Good

Merrimack County, New Hampshire · 0.2 MI Manchester Tl · Structure no. 012800960004900

Built
1976
49 years old, rebuilt 1998
Condition
Good
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
148 ft
1 main span
Daily traffic
34,221
2023 count
Owner
State
State Highway Agency

About this bridge

I-93 NB over US 3 Nh 28 is a steel stringer/multi-beam or girder carrying I-93 NB over US 3 Nh 28 in Merrimack County, New Hampshire. It was built in 1976 and reconstructed in 1998, so it is 49 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 34,221 vehicles a day, roughly 9% of them trucks, projected to reach 50,647 by 2043. The structure is 148 ft (45.1 m) long and 85 ft wide.

CarriesI-93 NB
CrossesUS 3 Nh 28
Location0.2 MI Manchester Tl
RouteInterstate 93
Coordinates43.02327, -71.44417
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50.4 US tons
Inventory rating36 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length148 ft (45.1 m)
Longest span142 ft (43.3 m)
Deck width85 ft (25.9 m)
Roadway width80 ft (24.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic34,221 (2023)
Projected traffic50,647 by 2043
Trucks9%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkNon-Interstate 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 US 3 Nh 28 built?

It was built in 1976, making it 49 years old in 2025. It was reconstructed in 1998.

What condition is I-93 NB over US 3 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 2024.

How much traffic does I-93 NB over US 3 Nh 28 carry?

About 34,221 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is I-93 NB over US 3 Nh 28?

The structure is 148 ft (45.1 m) long with a longest span of 142 ft (43.3 m) and a deck 85 ft wide.

Who owns I-93 NB over US 3 Nh 28?

It is owned by the State Highway Agency.