US Bridges

Clendenning RD over Deer Creek

Fair

Allegheny County, Pennsylvania · DE12 Deer Creek No. 12 · Structure no. 000000000002374

Built
1893
132 years old, rebuilt 1979
Condition
Fair
inspected October 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
32 ft
1 main span
Daily traffic
88
2005 count
Owner
County
County Highway Agency

About this bridge

Clendenning RD over Deer Creek is a prestressed concrete box beam or girders - multiple carrying Clendenning RD over Deer Creek in Allegheny County, Pennsylvania. It was built in 1893 and reconstructed in 1979, so it is 132 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 88 vehicles a day, roughly 2% of them trucks, projected to reach 100 by 2025. The structure is 32 ft (9.8 m) long and 26 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesClendenning RD
CrossesDeer Creek
LocationDE12 Deer Creek No. 12
RouteCity Street 0
Coordinates40.64423, -79.90881
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionOctober 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 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 rating49.1 US tons
Inventory rating26 US tons

Structure

MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length32 ft (9.8 m)
Longest span30 ft (9.1 m)
Deck width26 ft (7.9 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic88 (2005)
Projected traffic100 by 2025
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 proposedDeck rehabilitation with only incidental widening
Estimated improvement cost$65,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Clendenning RD over Deer Creek built?

It was built in 1893, making it 132 years old in 2025. It was reconstructed in 1979.

What condition is Clendenning RD over Deer 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 October 2023.

How much traffic does Clendenning RD over Deer Creek carry?

About 88 vehicles per day (2005 count), of which roughly 2% are trucks.

How long is Clendenning RD over Deer Creek?

The structure is 32 ft (9.8 m) long with a longest span of 30 ft (9.1 m) and a deck 26 ft wide.

Who owns Clendenning RD over Deer Creek?

It is owned by the County Highway Agency.