US Bridges

Route 309 over Stratton Brook

Fair

Hartford County, Connecticut · 0.3 Mile West of Rte. 167 · Structure no. 06192

Built
1992
33 years old
Condition
Fair
inspected November 2024
Type
Slab
Prestressed Concrete
Length
34 ft
1 main span
Daily traffic
3,300
2022 count
Owner
State
State Highway Agency

About this bridge

Route 309 over Stratton Brook is a prestressed concrete slab carrying Route 309 over Stratton Brook in Hartford County, Connecticut. It was built in 1992, so it is 33 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 6 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 3,300 vehicles a day, roughly 3% of them trucks, projected to reach 4,903 by 2042. The structure is 34 ft (10.4 m) long and 33 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesRoute 309
CrossesStratton Brook
Location0.3 Mile West of Rte. 167
RouteState Highway 309
Coordinates41.8701, -72.82428
Functional classRural Major Collector

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating37.1 US tons
Inventory rating28.5 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length34 ft (10.4 m)
Longest span30 ft (9.1 m)
Deck width33 ft (10.1 m)
Roadway width31 ft (9.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,300 (2022)
Projected traffic4,903 by 2042
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Route 309 over Stratton Brook built?

It was built in 1992, making it 33 years old in 2025.

What condition is Route 309 over Stratton 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 November 2024.

How much traffic does Route 309 over Stratton Brook carry?

About 3,300 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is Route 309 over Stratton Brook?

The structure is 34 ft (10.4 m) long with a longest span of 30 ft (9.1 m) and a deck 33 ft wide.

Who owns Route 309 over Stratton Brook?

It is owned by the State Highway Agency.