US Bridges

Route 109 over Wigwam Reservoir

Good

Litchfield County, Connecticut · On Thomaston Town Line · Structure no. 01309

Built
2019
6 years old
Condition
Good
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
104 ft
1 main span
Daily traffic
2,500
2020 count
Owner
State
State Highway Agency

About this bridge

Route 109 over Wigwam Reservoir is a steel stringer/multi-beam or girder carrying Route 109 over Wigwam Reservoir in Litchfield County, Connecticut. It was built in 2019, so it is 6 years old, younger 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 2,500 vehicles a day, roughly 5% of them trucks, projected to reach 3,715 by 2040. The structure is 104 ft (31.6 m) long and 38 ft wide. If it were closed, the detour would be 14.9 mi (24 km).

Location

Open in Google Maps
CarriesRoute 109
CrossesWigwam Reservoir
LocationOn Thomaston Town Line
RouteState Highway 109
CountyLitchfield County
StateConnecticut
Coordinates41.67326, -73.14256
Functional classRural Major Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating61.4 US tons
Inventory rating47.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length104 ft (31.6 m)
Longest span102 ft (31.1 m)
Deck width38 ft (11.5 m)
Roadway width34 ft (10.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,500 (2020)
Projected traffic3,715 by 2040
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.9 mi (24 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Route 109 over Wigwam Reservoir built?

It was built in 2019, making it 6 years old in 2025.

What condition is Route 109 over Wigwam Reservoir 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 September 2023.

How much traffic does Route 109 over Wigwam Reservoir carry?

About 2,500 vehicles per day (2020 count), of which roughly 5% are trucks.

How long is Route 109 over Wigwam Reservoir?

The structure is 104 ft (31.6 m) long with a longest span of 102 ft (31.1 m) and a deck 38 ft wide.

Who owns Route 109 over Wigwam Reservoir?

It is owned by the State Highway Agency.