US Bridges

RT.9 SB I-84 TR820 over INTERSTATE-84

Fair

Hartford County, Connecticut · Farmington Stack · Structure no. 03488

Built
1969
56 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
506 ft
6 main spans
Daily traffic
18,700
2019 count
Owner
State
State Highway Agency

About this bridge

RT.9 SB I-84 TR820 over INTERSTATE-84 is a steel stringer/multi-beam or girder carrying RT.9 SB I-84 TR820 over INTERSTATE-84 in Hartford County, Connecticut. It was built in 1969, so it is 56 years old, younger 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 18,700 vehicles a day, roughly 14% of them trucks, projected to reach 27,786 by 2039. The structure is 506 ft (154.3 m) long and 44 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesRT.9 SB I-84 TR820
CrossesINTERSTATE-84
LocationFarmington Stack
RouteInterstate 9
CountyHartford County
StateConnecticut
Coordinates41.72706, -72.77184
Functional classUrban Principal Arterial - Interstate

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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMarch 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 alignment7: Better than present minimum criteria
Operating rating95 US tons
Inventory rating57 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length506 ft (154.3 m)
Longest span100 ft (30.5 m)
Deck width44 ft (13.3 m)
Roadway width40 ft (12.1 m)
Vertical clearance over deck16 ft (5 m)

Traffic and service

Average daily traffic18,700 (2019)
Projected traffic27,786 by 2039
Trucks14%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was RT.9 SB I-84 TR820 over INTERSTATE-84 built?

It was built in 1969, making it 56 years old in 2025.

What condition is RT.9 SB I-84 TR820 over INTERSTATE-84 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 March 2023.

How much traffic does RT.9 SB I-84 TR820 over INTERSTATE-84 carry?

About 18,700 vehicles per day (2019 count), of which roughly 14% are trucks.

How long is RT.9 SB I-84 TR820 over INTERSTATE-84?

The structure is 506 ft (154.3 m) long with a longest span of 100 ft (30.5 m) and a deck 44 ft wide.

Who owns RT.9 SB I-84 TR820 over INTERSTATE-84?

It is owned by the State Highway Agency.