US Bridges

SR 510 Depot Hill over INTERSTATE-91

Fair

Hartford County, Connecticut · .8 Mile N of E Windsor Tl · Structure no. 01275

Built
1959
66 years old, rebuilt 1990
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
186 ft
4 main spans
Daily traffic
4,200
2016 count
Owner
State
State Highway Agency

About this bridge

SR 510 Depot Hill over INTERSTATE-91 is a steel stringer/multi-beam or girder carrying SR 510 Depot Hill over INTERSTATE-91 in Hartford County, Connecticut. It was built in 1959 and reconstructed in 1990, so it is 66 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 4,200 vehicles a day, roughly 5% of them trucks, projected to reach 6,241 by 2036. The structure is 186 ft (56.6 m) long and 51 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesSR 510 Depot Hill
CrossesINTERSTATE-91
Location.8 Mile N of E Windsor Tl
RouteState Highway 510
CountyHartford County
StateConnecticut
Coordinates41.94316, -72.60623
Functional classUrban Local

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.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
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
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68.2 US tons
Inventory rating52.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadH 20
Structure length186 ft (56.6 m)
Longest span58 ft (17.7 m)
Deck width51 ft (15.4 m)
Roadway width37 ft (11.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,200 (2016)
Projected traffic6,241 by 2036
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed3.7 mi (6 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was SR 510 Depot Hill over INTERSTATE-91 built?

It was built in 1959, making it 66 years old in 2025. It was reconstructed in 1990.

What condition is SR 510 Depot Hill over INTERSTATE-91 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 July 2023.

How much traffic does SR 510 Depot Hill over INTERSTATE-91 carry?

About 4,200 vehicles per day (2016 count), of which roughly 5% are trucks.

How long is SR 510 Depot Hill over INTERSTATE-91?

The structure is 186 ft (56.6 m) long with a longest span of 58 ft (17.7 m) and a deck 51 ft wide.

Who owns SR 510 Depot Hill over INTERSTATE-91?

It is owned by the State Highway Agency.