US Bridges

RT9 Nb& I-91 TR821 over I-91 NB & I-91 TR823

Fair

Middlesex County, Connecticut · .23 MI So of JCT I-91 SB · Structure no. 03156

Built
1965
60 years old
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
305 ft
3 main spans
Daily traffic
20,800
2022 count
Owner
State
State Highway Agency

About this bridge

RT9 Nb& I-91 TR821 over I-91 NB & I-91 TR823 is a steel continuous stringer/multi-beam or girder carrying RT9 Nb& I-91 TR821 over I-91 NB & I-91 TR823 in Middlesex County, Connecticut. It was built in 1965, so it is 60 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 20,800 vehicles a day, roughly 6% of them trucks, projected to reach 30,907 by 2042. The structure is 305 ft (93 m) long and 48 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesRT9 Nb& I-91 TR821
CrossesI-91 NB & I-91 TR823
Location.23 MI So of JCT I-91 SB
RouteState Highway 9
CountyMiddlesex County
StateConnecticut
Coordinates41.62574, -72.68907
Functional classUrban Principal Arterial - Other Freeway or Expressway

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 inspectionOctober 2024
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 geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66.7 US tons
Inventory rating40 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length305 ft (93 m)
Longest span116 ft (35.4 m)
Deck width48 ft (14.5 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic20,800 (2022)
Projected traffic30,907 by 2042
Trucks6%
Lanes on structure3
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkNon-Interstate STRAHNET route

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 RT9 Nb& I-91 TR821 over I-91 NB & I-91 TR823 built?

It was built in 1965, making it 60 years old in 2025.

What condition is RT9 Nb& I-91 TR821 over I-91 NB & I-91 TR823 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 RT9 Nb& I-91 TR821 over I-91 NB & I-91 TR823 carry?

About 20,800 vehicles per day (2022 count), of which roughly 6% are trucks.

How long is RT9 Nb& I-91 TR821 over I-91 NB & I-91 TR823?

The structure is 305 ft (93 m) long with a longest span of 116 ft (35.4 m) and a deck 48 ft wide.

Who owns RT9 Nb& I-91 TR821 over I-91 NB & I-91 TR823?

It is owned by the State Highway Agency.