US Bridges

I-89 SB over Stevens Brook Road

Fair

Merrimack County, New Hampshire · 0.2MI Warner T.L. · Structure no. 025001920005700

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

About this bridge

I-89 SB over Stevens Brook Road is a concrete frame carrying I-89 SB over Stevens Brook 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 40 ft (12.2 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI-89 SB
CrossesStevens Brook Road
Location0.2MI Warner T.L.
RouteInterstate 89
CountyMerrimack County
StateNew Hampshire
Coordinates43.31388, -71.86217
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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating83.3 US tons
Inventory rating49.9 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length40 ft (12.2 m)
Longest span35 ft (10.7 m)
Deck width43 ft (13 m)
Roadway width37 ft (11.4 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 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 SB over Stevens Brook Road built?

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

What condition is I-89 SB over Stevens Brook 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 Stevens Brook Road carry?

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

How long is I-89 SB over Stevens Brook Road?

The structure is 40 ft (12.2 m) long with a longest span of 35 ft (10.7 m) and a deck 43 ft wide.

Who owns I-89 SB over Stevens Brook Road?

It is owned by the State Highway Agency.