US Bridges

Twenty Eighth ST over N-S RR /Pat/Sassafras ST

PoorPosted for load

Allegheny County, Pennsylvania · 115 28th ST Bridge · Structure no. 000000000002461

Built
1931
94 years old, rebuilt 1974
Condition
Poor
inspected October 2022
Type
Truss - Thru
Steel
Length
315 ft
1 main span
Daily traffic
6,500
2004 count
Owner
City
City or Municipal Highway Agency

About this bridge

Twenty Eighth ST over N-S RR /Pat/Sassafras ST is a steel truss - thru carrying Twenty Eighth ST over N-S RR /Pat/Sassafras ST in Allegheny County, Pennsylvania. It was built in 1931 and reconstructed in 1974, so it is 94 years old, older than the Pennsylvania average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 6,500 vehicles a day, roughly 5% of them trucks, projected to reach 7,150 by 2019. The structure is 315 ft (96 m) long and 25 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesTwenty Eighth ST
CrossesN-S RR /Pat/Sassafras ST
Location115 28th ST Bridge
RouteCity Street 0
Coordinates40.45596, -79.97335
Functional classUrban Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2022
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourBridge not over waterway
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating36 US tons
Inventory rating21.1 US tons

Structure

Structure typeTruss - Thru
MaterialSteel
DeckConcrete, cast-in-place
Main spans1 (+4 approach)
Design loadHS 20
Structure length315 ft (96 m)
Longest span210 ft (64 m)
Deck width25 ft (7.5 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deck14 ft (4.1 m)

Traffic and service

Average daily traffic6,500 (2004)
Projected traffic7,150 by 2019
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway and railroad
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusEligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$869,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was Twenty Eighth ST over N-S RR /Pat/Sassafras ST built?

It was built in 1931, making it 94 years old in 2025. It was reconstructed in 1974.

What condition is Twenty Eighth ST over N-S RR /Pat/Sassafras ST in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in October 2022.

How much traffic does Twenty Eighth ST over N-S RR /Pat/Sassafras ST carry?

About 6,500 vehicles per day (2004 count), of which roughly 5% are trucks.

How long is Twenty Eighth ST over N-S RR /Pat/Sassafras ST?

The structure is 315 ft (96 m) long with a longest span of 210 ft (64 m) and a deck 25 ft wide.

Who owns Twenty Eighth ST over N-S RR /Pat/Sassafras ST?

It is owned by the City or Municipal Highway Agency.