US Bridges

Forbes Street over Porter Brook

Good

Hartford County, Connecticut · 100 Ft.South of Maple St. · Structure no. 06530

Built
1996
29 years old
Condition
Good
inspected March 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
79 ft
1 main span
Daily traffic
6,700
2018 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Forbes Street over Porter Brook is a prestressed concrete box beam or girders - multiple carrying Forbes Street over Porter Brook in Hartford County, Connecticut. It was built in 1996, so it is 29 years old, younger 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 6,700 vehicles a day, roughly 5% of them trucks, projected to reach 9,956 by 2038. The structure is 79 ft (24.1 m) long and 56 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesForbes Street
CrossesPorter Brook
Location100 Ft.South of Maple St.
RouteCity Street 0
Coordinates41.73573, -72.60511
Functional classUrban Minor 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 protection8 Very GoodNo problems noted.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
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 rating33.6 US tons
Inventory rating25.7 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length79 ft (24.1 m)
Longest span75 ft (22.9 m)
Deck width56 ft (17.2 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,700 (2018)
Projected traffic9,956 by 2038
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township 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 Forbes Street over Porter Brook built?

It was built in 1996, making it 29 years old in 2025.

What condition is Forbes Street over Porter 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 March 2023.

How much traffic does Forbes Street over Porter Brook carry?

About 6,700 vehicles per day (2018 count), of which roughly 5% are trucks.

How long is Forbes Street over Porter Brook?

The structure is 79 ft (24.1 m) long with a longest span of 75 ft (22.9 m) and a deck 56 ft wide.

Who owns Forbes Street over Porter Brook?

It is owned by the Town or Township Highway Agency.