US Bridges

Route 15 over Folly Brook

Fair

Hartford County, Connecticut · 0.26 Mile North of RTE 99 · Structure no. 00812

Built
1941
84 years old
Condition
Fair
inspected August 2023
Type
Culvert
Concrete Continuous
Length
24 ft
2 main spans
Daily traffic
47,500
2022 count
Owner
State
State Highway Agency

About this bridge

Route 15 over Folly Brook is a concrete continuous culvert carrying Route 15 over Folly Brook in Hartford County, Connecticut. It was built in 1941, so it is 84 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 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 47,500 vehicles a day, roughly 5% of them trucks, projected to reach 70,580 by 2042. The structure is 24 ft (7.4 m) long. If it were closed, the detour would be 1.2 mi (2 km).

CarriesRoute 15
CrossesFolly Brook
Location0.26 Mile North of RTE 99
RouteState Highway 15
Coordinates41.72776, -72.6659
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating110.1 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadUnknown
Structure length24 ft (7.4 m)
Longest span11 ft (3.5 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic47,500 (2022)
Projected traffic70,580 by 2042
Trucks5%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Route 15 over Folly Brook built?

It was built in 1941, making it 84 years old in 2025.

What condition is Route 15 over Folly 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 August 2023.

How much traffic does Route 15 over Folly Brook carry?

About 47,500 vehicles per day (2022 count), of which roughly 5% are trucks.

How long is Route 15 over Folly Brook?

The structure is 24 ft (7.4 m) long with a longest span of 11 ft (3.5 m).

Who owns Route 15 over Folly Brook?

It is owned by the State Highway Agency.