US Bridges

I-93 SB over North Lowell Road

Good

Rockingham County, New Hampshire · 0.6 MI South Derry Tl · Structure no. 028001040014200

Built
1995
30 years old, rebuilt 2019
Condition
Good
inspected May 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
105 ft
1 main span
Daily traffic
42,082
2023 count
Owner
State
State Highway Agency

About this bridge

I-93 SB over North Lowell Road is a prestressed concrete stringer/multi-beam or girder carrying I-93 SB over North Lowell Road in Rockingham County, New Hampshire. It was built in 1995 and reconstructed in 2019, so it is 30 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 42,082 vehicles a day, roughly 7% of them trucks, projected to reach 62,281 by 2043. The structure is 105 ft (32 m) long and 75 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

Location

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CarriesI-93 SB
CrossesNorth Lowell Road
Location0.6 MI South Derry Tl
RouteInterstate 93
CountyRockingham County
StateNew Hampshire
Coordinates42.83626, -71.29994
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75.9 US tons
Inventory rating47 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length105 ft (32 m)
Longest span97 ft (29.6 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
Trucks7%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed11.8 mi (19 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 North Lowell Road built?

It was built in 1995, making it 30 years old in 2025. It was reconstructed in 2019.

What condition is I-93 SB over North Lowell Road 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 North Lowell Road carry?

About 42,082 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is I-93 SB over North Lowell Road?

The structure is 105 ft (32 m) long with a longest span of 97 ft (29.6 m) and a deck 75 ft wide.

Who owns I-93 SB over North Lowell Road?

It is owned by the State Highway Agency.