US Bridges

I-89 SB over Gile Pond Road

Fair

Merrimack County, New Hampshire · 3.8MI New London T.L. · Structure no. 025001290011600

Built
1967
58 years old
Condition
Fair
inspected April 2023
Type
Frame
Concrete
Length
57 ft
1 main span
Daily traffic
9,452
2023 count
Owner
State
State Highway Agency

About this bridge

I-89 SB over Gile Pond Road is a concrete frame carrying I-89 SB 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 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 9,452 vehicles a day, roughly 9% of them trucks, projected to reach 13,988 by 2043. The structure is 57 ft (17.4 m) long and 44 ft wide.

Location

Open in Google Maps
CarriesI-89 SB
CrossesGile Pond Road
Location3.8MI New London T.L.
RouteInterstate 89
CountyMerrimack County
StateNew Hampshire
Coordinates43.35538, -71.92386
Functional classRural 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to 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 length57 ft (17.4 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 traffic9,452 (2023)
Projected traffic13,988 by 2043
Trucks9%
Lanes on structure2
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 SB over Gile Pond Road built?

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

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

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

About 9,452 vehicles per day (2023 count), of which roughly 9% are trucks.

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

The structure is 57 ft (17.4 m) long with a longest span of 50 ft (15.2 m) and a deck 44 ft wide.

Who owns I-89 SB over Gile Pond Road?

It is owned by the State Highway Agency.