US Bridges

Route 75 over Stony Brook

Fair

Hartford County, Connecticut · 0.8 MI South of Route 168 · Structure no. 01123

Built
1956
69 years old, rebuilt 1986
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
185 ft
4 main spans
Daily traffic
6,800
2022 count
Owner
State
State Highway Agency

About this bridge

Route 75 over Stony Brook is a steel stringer/multi-beam or girder carrying Route 75 over Stony Brook in Hartford County, Connecticut. It was built in 1956 and reconstructed in 1986, so it is 69 years old, older than the Connecticut average of 56.7 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 6,800 vehicles a day, roughly 4% of them trucks, projected to reach 10,104 by 2042. The structure is 185 ft (56.4 m) long and 46 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesRoute 75
CrossesStony Brook
Location0.8 MI South of Route 168
RouteState Highway 75
CountyHartford County
StateConnecticut
Coordinates41.97297, -72.65713
Functional classUrban Other Principal 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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating34 US tons
Inventory rating26.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length185 ft (56.4 m)
Longest span45 ft (13.7 m)
Deck width46 ft (13.9 m)
Roadway width42 ft (12.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,800 (2022)
Projected traffic10,104 by 2042
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 75 over Stony Brook built?

It was built in 1956, making it 69 years old in 2025. It was reconstructed in 1986.

What condition is Route 75 over Stony Brook 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 October 2024.

How much traffic does Route 75 over Stony Brook carry?

About 6,800 vehicles per day (2022 count), of which roughly 4% are trucks.

How long is Route 75 over Stony Brook?

The structure is 185 ft (56.4 m) long with a longest span of 45 ft (13.7 m) and a deck 46 ft wide.

Who owns Route 75 over Stony Brook?

It is owned by the State Highway Agency.