US Bridges

I-89 NB over Gile Pond Road

Good

Merrimack County, New Hampshire · 3.7MI New London T.L. · Structure no. 025001300011700

Built
1967
58 years old
Condition
Good
inspected April 2023
Type
Frame
Concrete
Length
58 ft
1 main span
Daily traffic
9,459
2023 count
Owner
State
State Highway Agency

About this bridge

I-89 NB over Gile Pond Road is a concrete frame carrying I-89 NB over Gile Pond Road in Merrimack County, New Hampshire. It was built in 1967, so it is 58 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 9,459 vehicles a day, roughly 9% of them trucks, projected to reach 13,999 by 2043. The structure is 58 ft (17.7 m) long and 44 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI-89 NB
CrossesGile Pond Road
Location3.7MI New London T.L.
RouteInterstate 89
CountyMerrimack County
StateNew Hampshire
Coordinates43.35584, -71.92332
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 inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating61 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length58 ft (17.7 m)
Longest span50 ft (15.2 m)
Deck width44 ft (13.3 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,459 (2023)
Projected traffic13,999 by 2043
Trucks9%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 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 Gile Pond Road built?

It was built in 1967, making it 58 years old in 2025.

What condition is I-89 NB over Gile Pond 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 April 2023.

How much traffic does I-89 NB over Gile Pond Road carry?

About 9,459 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is I-89 NB over Gile Pond Road?

The structure is 58 ft (17.7 m) long with a longest span of 50 ft (15.2 m) and a deck 44 ft wide.

Who owns I-89 NB over Gile Pond Road?

It is owned by the State Highway Agency.