US Bridges

Old Route 8 over Gourdhead Run

Fair

Allegheny County, Pennsylvania · GH02 Gourdhead No. 2 · Structure no. 000000000002309

Built
1914
111 years old
Condition
Fair
inspected August 2023
Type
Arch - Deck
Concrete
Length
35 ft
1 main span
Daily traffic
650
2005 count
Owner
County
County Highway Agency

About this bridge

Old Route 8 over Gourdhead Run is a concrete arch - deck carrying Old Route 8 over Gourdhead Run in Allegheny County, Pennsylvania. It was built in 1914, so it is 111 years old, older 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 5 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 650 vehicles a day, roughly 5% of them trucks, projected to reach 780 by 2025. The structure is 35 ft (10.7 m) long and 28 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesOld Route 8
CrossesGourdhead Run
LocationGH02 Gourdhead No. 2
RouteCity Street 0
CountyAllegheny County
StatePennsylvania
Coordinates40.56282, -79.95934
Functional classUrban Collector

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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating48 US tons
Inventory rating28 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckNot applicable
Main spans1
Design loadUnknown
Structure length35 ft (10.7 m)
Longest span35 ft (10.7 m)
Deck width28 ft (8.5 m)
Roadway width25 ft (7.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic650 (2005)
Projected traffic780 by 2025
Trucks5%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$75,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Old Route 8 over Gourdhead Run built?

It was built in 1914, making it 111 years old in 2025.

What condition is Old Route 8 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 August 2023.

How much traffic does Old Route 8 over Gourdhead Run carry?

About 650 vehicles per day (2005 count), of which roughly 5% are trucks.

How long is Old Route 8 over Gourdhead Run?

The structure is 35 ft (10.7 m) long with a longest span of 35 ft (10.7 m) and a deck 28 ft wide.

Who owns Old Route 8 over Gourdhead Run?

It is owned by the County Highway Agency.