US Bridges

I-89 NB over West Joppa Road

Good

Merrimack County, New Hampshire · 4.4 MI Hopkinton T.L. · Structure no. 026301950012200

Built
1966
59 years old, rebuilt 1993
Condition
Good
inspected May 2023
Type
Frame
Concrete
Length
40 ft
1 main span
Daily traffic
10,883
2023 count
Owner
State
State Highway Agency

About this bridge

I-89 NB over West Joppa Road is a concrete frame carrying I-89 NB over West Joppa Road in Merrimack County, New Hampshire. It was built in 1966 and reconstructed in 1993, so it is 59 years old, older 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 10,883 vehicles a day, roughly 9% of them trucks, projected to reach 16,106 by 2043. The structure is 40 ft (12.2 m) long and 44 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesI-89 NB
CrossesWest Joppa Road
Location4.4 MI Hopkinton T.L.
RouteInterstate 89
CountyMerrimack County
StateNew Hampshire
Coordinates43.2739, -71.80901
Functional classRural 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 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 rating78.3 US tons
Inventory rating47 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length40 ft (12.2 m)
Longest span35 ft (10.7 m)
Deck width44 ft (13.4 m)
Roadway width40 ft (12.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,883 (2023)
Projected traffic16,106 by 2043
Trucks9%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.7 mi (6 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-89 NB over West Joppa Road built?

It was built in 1966, making it 59 years old in 2025. It was reconstructed in 1993.

What condition is I-89 NB over West Joppa 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-89 NB over West Joppa Road carry?

About 10,883 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is I-89 NB over West Joppa Road?

The structure is 40 ft (12.2 m) long with a longest span of 35 ft (10.7 m) and a deck 44 ft wide.

Who owns I-89 NB over West Joppa Road?

It is owned by the State Highway Agency.