US Bridges

Sixteenthstreet Br over Smallman ST Alleg. Riv.

Fair

Allegheny County, Pennsylvania · AL05 16th ST Bridge · Structure no. 000000000002384

Built
1922
103 years old, rebuilt 2003
Condition
Fair
inspected February 2024
Type
Arch - Thru
Steel
Length
1,900 ft
3 main spans
Daily traffic
14,656
2006 count
Owner
County
County Highway Agency

About this bridge

Sixteenthstreet Br over Smallman ST Alleg. Riv. is a steel arch - thru carrying Sixteenthstreet Br over Smallman ST Alleg. Riv. in Allegheny County, Pennsylvania. It was built in 1922 and reconstructed in 2003, so it is 103 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 14,656 vehicles a day, roughly 10% of them trucks, projected to reach 16,122 by 2026. The structure is 1,900 ft (579.1 m) long and 60 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesSixteenthstreet Br
CrossesSmallman ST Alleg. Riv.
LocationAL05 16th ST Bridge
RouteCity Street 0
CountyAllegheny County
StatePennsylvania
Coordinates40.4516, -79.9908
Functional classUrban Other Principal Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeArch - Thru
MaterialSteel
DeckCorrugated steel
Main spans3 (+31 approach)
Design loadHS 25 or greater
Structure length1,900 ft (579.1 m)
Longest span437 ft (133.2 m)
Deck width60 ft (18.2 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deck16 ft (4.9 m)

Traffic and service

Average daily traffic14,656 (2006)
Projected traffic16,122 by 2026
Trucks10%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway and waterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusListed on the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost$123.5 million
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was Sixteenthstreet Br over Smallman ST Alleg. Riv. built?

It was built in 1922, making it 103 years old in 2025. It was reconstructed in 2003.

What condition is Sixteenthstreet Br over Smallman ST Alleg. Riv. 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 February 2024.

How much traffic does Sixteenthstreet Br over Smallman ST Alleg. Riv. carry?

About 14,656 vehicles per day (2006 count), of which roughly 10% are trucks.

How long is Sixteenthstreet Br over Smallman ST Alleg. Riv.?

The structure is 1,900 ft (579.1 m) long with a longest span of 437 ft (133.2 m) and a deck 60 ft wide.

Who owns Sixteenthstreet Br over Smallman ST Alleg. Riv.?

It is owned by the County Highway Agency.