US Bridges

I-89 Nh 10 SB over I-89 Ramp

Fair

Sullivan County, New Hampshire · 0.1 MI Enfield Tl · Structure no. 010001020017400

Built
1959
66 years old, rebuilt 2016
Condition
Fair
inspected April 2023
Type
Frame
Concrete
Length
62 ft
1 main span
Daily traffic
10,987
2023 count
Owner
State
State Highway Agency

About this bridge

I-89 Nh 10 SB over I-89 Ramp is a concrete frame carrying I-89 Nh 10 SB over I-89 Ramp in Sullivan County, New Hampshire. It was built in 1959 and reconstructed in 2016, so it is 66 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 10,987 vehicles a day, roughly 9% of them trucks, projected to reach 16,260 by 2043. The structure is 62 ft (18.9 m) long and 50 ft wide. If it were closed, the detour would be 19.9 mi (32 km).

Location

Open in Google Maps
CarriesI-89 Nh 10 SB
CrossesI-89 Ramp
Location0.1 MI Enfield Tl
RouteInterstate 89
CountySullivan County
StateNew Hampshire
Coordinates43.56679, -72.14958
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.
Substructure7 GoodSome minor problems.
Last inspectionApril 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 rating99 US tons
Inventory rating79.6 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length62 ft (18.9 m)
Longest span54 ft (16.5 m)
Deck width50 ft (15.2 m)
Roadway width46 ft (13.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,987 (2023)
Projected traffic16,260 by 2043
Trucks9%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed19.9 mi (32 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 Nh 10 SB over I-89 Ramp built?

It was built in 1959, making it 66 years old in 2025. It was reconstructed in 2016.

What condition is I-89 Nh 10 SB over I-89 Ramp 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 Nh 10 SB over I-89 Ramp carry?

About 10,987 vehicles per day (2023 count), of which roughly 9% are trucks.

How long is I-89 Nh 10 SB over I-89 Ramp?

The structure is 62 ft (18.9 m) long with a longest span of 54 ft (16.5 m) and a deck 50 ft wide.

Who owns I-89 Nh 10 SB over I-89 Ramp?

It is owned by the State Highway Agency.