US Bridges

Flat Rocks Road over W Branch Shepaug River

Good

Litchfield County, Connecticut · +/- 2 MI West of Rte. 45 · Structure no. 06979

Built
2017
8 years old
Condition
Good
inspected December 2024
Type
Arch - Deck
Concrete
Length
23 ft
1 main span
Daily traffic
54
2024 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Flat Rocks Road over W Branch Shepaug River is a concrete arch - deck carrying Flat Rocks Road over W Branch Shepaug River in Litchfield County, Connecticut. It was built in 2017, so it is 8 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 54 vehicles a day, projected to reach 80 by 2044. The structure is 23 ft (7 m) long and 18 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesFlat Rocks Road
CrossesW Branch Shepaug River
Location+/- 2 MI West of Rte. 45
RouteCity Street 0
Coordinates41.78372, -73.32206
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation8: Equal to present desirable criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating47 US tons
Inventory rating36 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadUnknown
Structure length23 ft (7 m)
Longest span21 ft (6.4 m)
Deck width18 ft (5.5 m)
Roadway width15 ft (4.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic54 (2024)
Projected traffic80 by 2044
Trucks—
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 Flat Rocks Road over W Branch Shepaug River built?

It was built in 2017, making it 8 years old in 2025.

What condition is Flat Rocks Road over W Branch Shepaug River 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 December 2024.

How much traffic does Flat Rocks Road over W Branch Shepaug River carry?

About 54 vehicles per day (2024 count).

How long is Flat Rocks Road over W Branch Shepaug River?

The structure is 23 ft (7 m) long with a longest span of 21 ft (6.4 m) and a deck 18 ft wide.

Who owns Flat Rocks Road over W Branch Shepaug River?

It is owned by the Town or Township Highway Agency.