US Bridges

SR 0028 NB over Gamma Drive (twp RD 505)

Fair

Allegheny County, Pennsylvania · R.I.D.C. Interchange · Structure no. 000000000000625

Built
1970
55 years old, rebuilt 2001
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
175 ft
3 main spans
Daily traffic
23,171
2024 count
Owner
State
State Highway Agency

About this bridge

SR 0028 NB over Gamma Drive (twp RD 505) is a prestressed concrete stringer/multi-beam or girder carrying SR 0028 NB over Gamma Drive (twp RD 505) in Allegheny County, Pennsylvania. It was built in 1970 and reconstructed in 2001, so it is 55 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 23,171 vehicles a day, roughly 5% of them trucks, projected to reach 21,180 by 2032. The structure is 175 ft (53.3 m) long and 55 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesSR 0028 NB
CrossesGamma Drive (twp RD 505)
LocationR.I.D.C. Interchange
RouteState Highway 28
CountyAllegheny County
StatePennsylvania
Coordinates40.50108, -79.86234
Functional classUrban Principal Arterial - Other Freeway or Expressway

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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating70 US tons
Inventory rating27 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length175 ft (53.3 m)
Longest span84 ft (25.6 m)
Deck width55 ft (16.9 m)
Roadway width51 ft (15.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic23,171 (2024)
Projected traffic21,180 by 2032
Trucks5%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemYes

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$508,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was SR 0028 NB over Gamma Drive (twp RD 505) built?

It was built in 1970, making it 55 years old in 2025. It was reconstructed in 2001.

What condition is SR 0028 NB over Gamma Drive (twp RD 505) 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 June 2023.

How much traffic does SR 0028 NB over Gamma Drive (twp RD 505) carry?

About 23,171 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is SR 0028 NB over Gamma Drive (twp RD 505)?

The structure is 175 ft (53.3 m) long with a longest span of 84 ft (25.6 m) and a deck 55 ft wide.

Who owns SR 0028 NB over Gamma Drive (twp RD 505)?

It is owned by the State Highway Agency.