US Bridges

Plymouth Road over Rock Brook

Good

Litchfield County, Connecticut · App 200 N of Coventry LN · Structure no. 05052

Built
1997
28 years old
Condition
Good
inspected October 2022
Type
Slab
Prestressed Concrete
Length
44 ft
1 main span
Daily traffic
657
2022 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Plymouth Road over Rock Brook is a prestressed concrete slab carrying Plymouth Road over Rock Brook in Litchfield County, Connecticut. It was built in 1997, so it is 28 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 657 vehicles a day, roughly 2% of them trucks, projected to reach 976 by 2042. The structure is 44 ft (13.4 m) long and 32 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesPlymouth Road
CrossesRock Brook
LocationApp 200 N of Coventry LN
RouteCity Street 0
CountyLitchfield County
StateConnecticut
Coordinates41.75714, -73.04544
Functional classRural Minor Collector

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 protection7 GoodSome minor problems.
Last inspectionOctober 2022
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating35.7 US tons
Inventory rating27.4 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length44 ft (13.4 m)
Longest span42 ft (12.8 m)
Deck width32 ft (9.9 m)
Roadway width29 ft (8.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic657 (2022)
Projected traffic976 by 2042
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 Plymouth Road over Rock Brook built?

It was built in 1997, making it 28 years old in 2025.

What condition is Plymouth Road over Rock 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 October 2022.

How much traffic does Plymouth Road over Rock Brook carry?

About 657 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is Plymouth Road over Rock Brook?

The structure is 44 ft (13.4 m) long with a longest span of 42 ft (12.8 m) and a deck 32 ft wide.

Who owns Plymouth Road over Rock Brook?

It is owned by the Town or Township Highway Agency.