US Bridges

Route 83 over Thresher Brook

Good

Tolland County, Connecticut · 0.2 Mile North of SR 528 · Structure no. 01147

Built
1957
68 years old, rebuilt 1999
Condition
Good
inspected June 2023
Type
Slab
Prestressed Concrete
Length
30 ft
1 main span
Daily traffic
4,100
2020 count
Owner
State
State Highway Agency

About this bridge

Route 83 over Thresher Brook is a prestressed concrete slab carrying Route 83 over Thresher Brook in Tolland County, Connecticut. It was built in 1957 and reconstructed in 1999, so it is 68 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 4,100 vehicles a day, roughly 4% of them trucks, projected to reach 6,092 by 2040. The structure is 30 ft (9.1 m) long and 46 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesRoute 83
CrossesThresher Brook
Location0.2 Mile North of SR 528
RouteState Highway 83
Coordinates42.01952, -72.44909
Functional classUrban Other Principal Arterial

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
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 rating110.1 US tons
Inventory rating110.1 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length30 ft (9.1 m)
Longest span26 ft (7.9 m)
Deck width46 ft (14 m)
Roadway width43 ft (13.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,100 (2020)
Projected traffic6,092 by 2040
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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 83 over Thresher Brook built?

It was built in 1957, making it 68 years old in 2025. It was reconstructed in 1999.

What condition is Route 83 over Thresher Brook 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 June 2023.

How much traffic does Route 83 over Thresher Brook carry?

About 4,100 vehicles per day (2020 count), of which roughly 4% are trucks.

How long is Route 83 over Thresher Brook?

The structure is 30 ft (9.1 m) long with a longest span of 26 ft (7.9 m) and a deck 46 ft wide.

Who owns Route 83 over Thresher Brook?

It is owned by the State Highway Agency.