US Bridges

Nh 12 NH103 over Connecticut River

Fair

Windsor County, Vermont · Nh Vt Sl · Structure no. 200153B00114202

Built
1969
56 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
678 ft
4 main spans
Daily traffic
9,229
2021 count
Owner
State
State Highway Agency

About this bridge

Nh 12 NH103 over Connecticut River is a steel continuous stringer/multi-beam or girder carrying Nh 12 NH103 over Connecticut River in Windsor County, Vermont. It was built in 1969, so it is 56 years old, younger than the Vermont average of 60.8 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 9,229 vehicles a day, roughly 7% of them trucks, projected to reach 13,658 by 2041. The structure is 678 ft (206.7 m) long and 48 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesNh 12 NH103
CrossesConnecticut River
LocationNh Vt Sl
RouteState Highway 12
CountyWindsor County
StateVermont
Coordinates43.40306, -72.40029
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating58.9 US tons
Inventory rating35.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length678 ft (206.7 m)
Longest span180 ft (54.9 m)
Deck width48 ft (14.7 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,229 (2021)
Projected traffic13,658 by 2041
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 statusPossibly eligible for the National Register; requires further investigation
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$3.1 million (2022 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nh 12 NH103 over Connecticut River built?

It was built in 1969, making it 56 years old in 2025.

What condition is Nh 12 NH103 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 2023.

How much traffic does Nh 12 NH103 over Connecticut River carry?

About 9,229 vehicles per day (2021 count), of which roughly 7% are trucks.

How long is Nh 12 NH103 over Connecticut River?

The structure is 678 ft (206.7 m) long with a longest span of 180 ft (54.9 m) and a deck 48 ft wide.

Who owns Nh 12 NH103 over Connecticut River?

It is owned by the State Highway Agency.