US Bridges

SR 28 SB over Rt 8 Nb/Sb Rt 8 Rmps

Fair

Allegheny County, Pennsylvania · Etna Interchange SB · Structure no. 000000000000599

Built
1960
65 years old, rebuilt 2001
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
1,046 ft
11 main spans
Daily traffic
40,992
2024 count
Owner
State
State Highway Agency

About this bridge

SR 28 SB over Rt 8 Nb/Sb Rt 8 Rmps is a steel continuous stringer/multi-beam or girder carrying SR 28 SB over Rt 8 Nb/Sb Rt 8 Rmps in Allegheny County, Pennsylvania. It was built in 1960 and reconstructed in 2001, so it is 65 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 40,992 vehicles a day, roughly 7% of them trucks, projected to reach 27,086 by 2032. The structure is 1,046 ft (318.8 m) long and 35 ft wide.

Location

Open in Google Maps
CarriesSR 28 SB
CrossesRt 8 Nb/Sb Rt 8 Rmps
LocationEtna Interchange SB
RouteState Highway 28
CountyAllegheny County
StatePennsylvania
Coordinates40.49615, -79.93937
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.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating82 US tons
Inventory rating49.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans11 (+1 approach)
Design loadHS 25 or greater
Structure length1,046 ft (318.8 m)
Longest span102 ft (31.1 m)
Deck width35 ft (10.6 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic40,992 (2024)
Projected traffic27,086 by 2032
Trucks7%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway, waterway and railroad
Detour if closed—
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—
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 28 SB over Rt 8 Nb/Sb Rt 8 Rmps built?

It was built in 1960, making it 65 years old in 2025. It was reconstructed in 2001.

What condition is SR 28 SB over Rt 8 Nb/Sb Rt 8 Rmps 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 April 2024.

How much traffic does SR 28 SB over Rt 8 Nb/Sb Rt 8 Rmps carry?

About 40,992 vehicles per day (2024 count), of which roughly 7% are trucks.

How long is SR 28 SB over Rt 8 Nb/Sb Rt 8 Rmps?

The structure is 1,046 ft (318.8 m) long with a longest span of 102 ft (31.1 m) and a deck 35 ft wide.

Who owns SR 28 SB over Rt 8 Nb/Sb Rt 8 Rmps?

It is owned by the State Highway Agency.