US Bridges

NH108 over Exeter River

Fair

Rockingham County, New Hampshire · 0.3 MI from Kensington Tl · Structure no. 008200890004500

Built
1935
90 years old
Condition
Fair
inspected May 2024
Type
Tee Beam
Concrete Continuous
Length
122 ft
3 main spans
Daily traffic
4,920
2023 count
Owner
State
State Highway Agency

About this bridge

NH108 over Exeter River is a concrete continuous tee beam carrying NH108 over Exeter River in Rockingham County, New Hampshire. It was built in 1935, so it is 90 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 5 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 4,920 vehicles a day, roughly 4% of them trucks, projected to reach 7,281 by 2043. The structure is 122 ft (37.2 m) long and 28 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesNH108
CrossesExeter River
Location0.3 MI from Kensington Tl
RouteState Highway 108
CountyRockingham County
StateNew Hampshire
Coordinates42.9615, -70.95622
Functional classUrban Minor Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating47 US tons
Inventory rating28 US tons

Structure

Structure typeTee Beam
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length122 ft (37.2 m)
Longest span48 ft (14.6 m)
Deck width28 ft (8.6 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,920 (2023)
Projected traffic7,281 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusEligible 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)
NavigationNo navigation control on waterway

Frequently asked questions

When was NH108 over Exeter River built?

It was built in 1935, making it 90 years old in 2025.

What condition is NH108 over Exeter River 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 May 2024.

How much traffic does NH108 over Exeter River carry?

About 4,920 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is NH108 over Exeter River?

The structure is 122 ft (37.2 m) long with a longest span of 48 ft (14.6 m) and a deck 28 ft wide.

Who owns NH108 over Exeter River?

It is owned by the State Highway Agency.