US Bridges

NH123 over Connecticut River

Fair

Cheshire County, New Hampshire · Vermont State Line · Structure no. 026201320006200

Built
1910
115 years old, rebuilt 1989
Condition
Fair
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
468 ft
3 main spans
Daily traffic
8,425
2023 count
Owner
State
State Highway Agency

About this bridge

NH123 over Connecticut River is a steel stringer/multi-beam or girder carrying NH123 over Connecticut River in Cheshire County, New Hampshire. It was built in 1910 and reconstructed in 1989, so it is 115 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 8,425 vehicles a day, roughly 7% of them trucks, projected to reach 12,469 by 2043. The structure is 468 ft (142.6 m) long and 31 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesNH123
CrossesConnecticut River
LocationVermont State Line
RouteState Highway 123
CountyCheshire County
StateNew Hampshire
Coordinates43.0843, -72.43331
Functional classRural 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating65.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length468 ft (142.6 m)
Longest span158 ft (48.2 m)
Deck width31 ft (9.6 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,425 (2023)
Projected traffic12,469 by 2043
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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 NH123 over Connecticut River built?

It was built in 1910, making it 115 years old in 2025. It was reconstructed in 1989.

What condition is NH123 over Connecticut 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 June 2024.

How much traffic does NH123 over Connecticut River carry?

About 8,425 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is NH123 over Connecticut River?

The structure is 468 ft (142.6 m) long with a longest span of 158 ft (48.2 m) and a deck 31 ft wide.

Who owns NH123 over Connecticut River?

It is owned by the State Highway Agency.