US Bridges

Guinea Road over Route 15

Fair

Fairfield County, Connecticut · 1.4 MI S of Route 104 · Structure no. 00700

Built
1937
88 years old
Condition
Fair
inspected July 2024
Type
Arch - Deck
Concrete
Length
80 ft
1 main span
Daily traffic
1,479
2024 count
Owner
State
State Highway Agency

About this bridge

Guinea Road over Route 15 is a concrete arch - deck carrying Guinea Road over Route 15 in Fairfield County, Connecticut. It was built in 1937, so it is 88 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 1,479 vehicles a day, roughly 4% of them trucks, projected to reach 2,198 by 2044. The structure is 80 ft (24.4 m) long and 37 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesGuinea Road
CrossesRoute 15
Location1.4 MI S of Route 104
RouteCity Street 0
Coordinates41.10085, -73.59202
Functional classUrban Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating107.1 US tons
Inventory rating107.1 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckNot applicable
Main spans1
Design loadH 20
Structure length80 ft (24.4 m)
Longest span80 ft (24.4 m)
Deck width37 ft (11.2 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,479 (2024)
Projected traffic2,198 by 2044
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusListed on the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Guinea Road over Route 15 built?

It was built in 1937, making it 88 years old in 2025.

What condition is Guinea Road over Route 15 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 July 2024.

How much traffic does Guinea Road over Route 15 carry?

About 1,479 vehicles per day (2024 count), of which roughly 4% are trucks.

How long is Guinea Road over Route 15?

The structure is 80 ft (24.4 m) long with a longest span of 80 ft (24.4 m) and a deck 37 ft wide.

Who owns Guinea Road over Route 15?

It is owned by the State Highway Agency.