US Bridges

West Thompson Road over Spillway Channel

Good

Windham County, Connecticut · 3.22 KM North of Putnam · Structure no. CEPNEDCT0910001

Built
1965
60 years old
Condition
Good
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
114 ft
1 main span
Daily traffic
3,800
2024 count
Owner
Federal
Corps of Engineers (Civil)

About this bridge

West Thompson Road over Spillway Channel is a steel stringer/multi-beam or girder carrying West Thompson Road over Spillway Channel in Windham County, Connecticut. It was built in 1965, so it is 60 years old, older than the Connecticut average of 56.7 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 3,800 vehicles a day, roughly 6% of them trucks, projected to reach 500 by 2042. The structure is 114 ft (34.8 m) long and 44 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesWest Thompson Road
CrossesSpillway Channel
Location3.22 KM North of Putnam
RouteFederal Lands Road 0
Coordinates41.94442, -71.90195
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating76.4 US tons
Inventory rating59 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length114 ft (34.8 m)
Longest span114 ft (34.8 m)
Deck width44 ft (13.5 m)
Roadway width39 ft (11.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,800 (2024)
Projected traffic500 by 2042
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesRelief for waterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCorps of Engineers (Civil)
Maintained byCorps of Engineers (Civil)
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$10,000 (2024 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was West Thompson Road over Spillway Channel built?

It was built in 1965, making it 60 years old in 2025.

What condition is West Thompson Road over Spillway Channel in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in August 2024.

How much traffic does West Thompson Road over Spillway Channel carry?

About 3,800 vehicles per day (2024 count), of which roughly 6% are trucks.

How long is West Thompson Road over Spillway Channel?

The structure is 114 ft (34.8 m) long with a longest span of 114 ft (34.8 m) and a deck 44 ft wide.

Who owns West Thompson Road over Spillway Channel?

It is owned by the Corps of Engineers (Civil).