US Bridges

Douglas Run RD over Gillespie Run

Good

Allegheny County, Pennsylvania · Elizabeth · Structure no. 000000000044981

Built
2008
17 years old
Condition
Good
inspected January 2024
Type
Culvert
Concrete
Length
21 ft
1 main span
Daily traffic
1,747
2024 count
Owner
State
State Highway Agency

About this bridge

Douglas Run RD over Gillespie Run is a concrete culvert carrying Douglas Run RD over Gillespie Run in Allegheny County, Pennsylvania. It was built in 2008, so it is 17 years old, younger than the Pennsylvania average of 54.8 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 1,747 vehicles a day, roughly 6% of them trucks, projected to reach 1,236 by 2032. The structure is 21 ft (6.4 m) long and 28 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesDouglas Run RD
CrossesGillespie Run
LocationElizabeth
RouteState Highway 0
CountyAllegheny County
StatePennsylvania
Coordinates40.22914, -79.82121
Functional classUrban Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert8 Very GoodNo problems noted.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating72 US tons
Inventory rating43 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHS 20
Structure length21 ft (6.4 m)
Longest span15 ft (4.6 m)
Deck width28 ft (8.6 m)
Roadway width24 ft (7.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,747 (2024)
Projected traffic1,236 by 2032
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 Douglas Run RD over Gillespie Run built?

It was built in 2008, making it 17 years old in 2025.

What condition is Douglas Run RD over Gillespie Run 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 January 2024.

How much traffic does Douglas Run RD over Gillespie Run carry?

About 1,747 vehicles per day (2024 count), of which roughly 6% are trucks.

How long is Douglas Run RD over Gillespie Run?

The structure is 21 ft (6.4 m) long with a longest span of 15 ft (4.6 m) and a deck 28 ft wide.

Who owns Douglas Run RD over Gillespie Run?

It is owned by the State Highway Agency.