US Bridges

I-89 NB over Plaza Connector Road

Fair

Grafton County, New Hampshire · 0.4 MI East of Vt/Nh Line · Structure no. 014400490010000

Built
2012
13 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Concrete
Length
56 ft
1 main span
Daily traffic
28,690
2023 count
Owner
State
State Highway Agency

About this bridge

I-89 NB over Plaza Connector Road is a concrete stringer/multi-beam or girder carrying I-89 NB over Plaza Connector Road in Grafton County, New Hampshire. It was built in 2012, so it is 13 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 fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 28,690 vehicles a day, roughly 50% of them trucks, projected to reach 42,461 by 2043. The structure is 56 ft (17.1 m) long and 74 ft wide.

Location

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CarriesI-89 NB
CrossesPlaza Connector Road
Location0.4 MI East of Vt/Nh Line
RouteState Highway 0I-89
CountyGrafton County
StateNew Hampshire
Coordinates43.63217, -72.3228
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure8 Very GoodNo problems noted.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating79.7 US tons
Inventory rating47.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length56 ft (17.1 m)
Longest span49 ft (14.9 m)
Deck width74 ft (22.7 m)
Roadway width70 ft (21.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic28,690 (2023)
Projected traffic42,461 by 2043
Trucks50%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
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 Plaza Connector Road built?

It was built in 2012, making it 13 years old in 2025.

What condition is I-89 NB over Plaza Connector Road in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in June 2023.

How much traffic does I-89 NB over Plaza Connector Road carry?

About 28,690 vehicles per day (2023 count), of which roughly 50% are trucks.

How long is I-89 NB over Plaza Connector Road?

The structure is 56 ft (17.1 m) long with a longest span of 49 ft (14.9 m) and a deck 74 ft wide.

Who owns I-89 NB over Plaza Connector Road?

It is owned by the State Highway Agency.