US Bridges

SR 28 NB over Saxonburg RD

Fair

Allegheny County, Pennsylvania · 1 MI S of Freeport Intch · Structure no. 000000000000654

Built
1972
53 years old, rebuilt 2005
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
339 ft
4 main spans
Daily traffic
13,076
2024 count
Owner
State
State Highway Agency

About this bridge

SR 28 NB over Saxonburg RD is a steel continuous stringer/multi-beam or girder carrying SR 28 NB over Saxonburg RD in Allegheny County, Pennsylvania. It was built in 1972 and reconstructed in 2005, so it is 53 years old, younger 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 13,076 vehicles a day, roughly 9% of them trucks, projected to reach 11,897 by 2032. The structure is 339 ft (103.3 m) long and 43 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesSR 28 NB
CrossesSaxonburg RD
Location1 MI S of Freeport Intch
RouteState Highway 28
CountyAllegheny County
StatePennsylvania
Coordinates40.65312, -79.72474
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
Deck7 GoodSome minor problems.
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 inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75 US tons
Inventory rating45 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length339 ft (103.3 m)
Longest span92 ft (28 m)
Deck width43 ft (13.2 m)
Roadway width39 ft (11.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,076 (2024)
Projected traffic11,897 by 2032
Trucks9%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and waterway
Detour if closed1.2 mi (2 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 28 NB over Saxonburg RD built?

It was built in 1972, making it 53 years old in 2025. It was reconstructed in 2005.

What condition is SR 28 NB over Saxonburg RD 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 28 NB over Saxonburg RD carry?

About 13,076 vehicles per day (2024 count), of which roughly 9% are trucks.

How long is SR 28 NB over Saxonburg RD?

The structure is 339 ft (103.3 m) long with a longest span of 92 ft (28 m) and a deck 43 ft wide.

Who owns SR 28 NB over Saxonburg RD?

It is owned by the State Highway Agency.