US Bridges

Duncan Avenue over Gourdhead Run

Fair

Allegheny County, Pennsylvania · 200 Ft W of SR 8 · Structure no. 000000000048515

Built
2014
11 years old
Condition
Fair
inspected April 2024
Type
Culvert
Concrete
Length
34 ft
1 main span
Daily traffic
4,000
2018 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Duncan Avenue over Gourdhead Run is a concrete culvert carrying Duncan Avenue over Gourdhead Run in Allegheny County, Pennsylvania. It was built in 2014, so it is 11 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 4,000 vehicles a day, roughly 1% of them trucks, projected to reach 5,000 by 2038. The structure is 34 ft (10.4 m) long. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesDuncan Avenue
CrossesGourdhead Run
Location200 Ft W of SR 8
RouteCity Street 0
CountyAllegheny County
StatePennsylvania
Coordinates40.55957, -79.96016
Functional classRural 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 inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50 US tons
Inventory rating39.2 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHL 93
Structure length34 ft (10.4 m)
Longest span32 ft (9.8 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,000 (2018)
Projected traffic5,000 by 2038
Trucks1%
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 Duncan Avenue over Gourdhead Run built?

It was built in 2014, making it 11 years old in 2025.

What condition is Duncan Avenue over Gourdhead Run 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 April 2024.

How much traffic does Duncan Avenue over Gourdhead Run carry?

About 4,000 vehicles per day (2018 count), of which roughly 1% are trucks.

How long is Duncan Avenue over Gourdhead Run?

The structure is 34 ft (10.4 m) long with a longest span of 32 ft (9.8 m).

Who owns Duncan Avenue over Gourdhead Run?

It is owned by the Town or Township Highway Agency.