US Bridges

Unity Terrace over Stoney Creek

Fair

Delaware County, Pennsylvania · W of Mitchell Ave 3697-H6 · Structure no. 000000000054856

Built
1980
45 years old
Condition
Fair
inspected August 2024
Type
Culvert
Concrete
Length
20 ft
1 main span
Daily traffic
1,000
2018 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Unity Terrace over Stoney Creek is a concrete culvert carrying Unity Terrace over Stoney Creek in Delaware County, Pennsylvania. It was built in 1980, so it is 45 years old, younger than the Pennsylvania average of 54.8 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 1,000 vehicles a day, roughly 2% of them trucks, projected to reach 1,250 by 2038. The structure is 20 ft (6.1 m) long and 51 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesUnity Terrace
CrossesStoney Creek
LocationW of Mitchell Ave 3697-H6
RouteCity Street 10
Coordinates39.90409, -75.32512
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
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
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 rating54 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length20 ft (6.1 m)
Longest span20 ft (6.1 m)
Deck width51 ft (15.4 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,000 (2018)
Projected traffic1,250 by 2038
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Unity Terrace over Stoney Creek built?

It was built in 1980, making it 45 years old in 2025.

What condition is Unity Terrace over Stoney Creek 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 2024.

How much traffic does Unity Terrace over Stoney Creek carry?

About 1,000 vehicles per day (2018 count), of which roughly 2% are trucks.

How long is Unity Terrace over Stoney Creek?

The structure is 20 ft (6.1 m) long with a longest span of 20 ft (6.1 m) and a deck 51 ft wide.

Who owns Unity Terrace over Stoney Creek?

It is owned by the Town or Township Highway Agency.