US Bridges

Round Hill RD over Douglas Run Branch

Fair

Allegheny County, Pennsylvania · DG08 Douglas Run # 8 · Structure no. 000000000002144

Built
1901
124 years old, rebuilt 1950
Condition
Fair
inspected November 2022
Type
Stringer/Multi-beam or Girder
Steel
Length
21 ft
1 main span
Daily traffic
3,288
2004 count
Owner
County
County Highway Agency

About this bridge

Round Hill RD over Douglas Run Branch is a steel stringer/multi-beam or girder carrying Round Hill RD over Douglas Run Branch in Allegheny County, Pennsylvania. It was built in 1901 and reconstructed in 1950, so it is 124 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 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 3,288 vehicles a day, roughly 5% of them trucks, projected to reach 4,000 by 2030. The structure is 21 ft (6.4 m) long and 86 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesRound Hill RD
CrossesDouglas Run Branch
LocationDG08 Douglas Run # 8
RouteCounty Highway 0
CountyAllegheny County
StatePennsylvania
Coordinates40.24152, -79.8395
Functional classRural Major 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2022
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59 US tons
Inventory rating35.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckNot applicable
Main spans1
Design loadUnknown
Structure length21 ft (6.4 m)
Longest span17 ft (5.2 m)
Deck width86 ft (26.2 m)
Roadway width83 ft (25.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,288 (2004)
Projected traffic4,000 by 2030
Trucks5%
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

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$82,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Round Hill RD over Douglas Run Branch built?

It was built in 1901, making it 124 years old in 2025. It was reconstructed in 1950.

What condition is Round Hill RD over Douglas Run Branch 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 November 2022.

How much traffic does Round Hill RD over Douglas Run Branch carry?

About 3,288 vehicles per day (2004 count), of which roughly 5% are trucks.

How long is Round Hill RD over Douglas Run Branch?

The structure is 21 ft (6.4 m) long with a longest span of 17 ft (5.2 m) and a deck 86 ft wide.

Who owns Round Hill RD over Douglas Run Branch?

It is owned by the County Highway Agency.