US Bridges

Hill RD over Zoo Walkway

Fair

Allegheny County, Pennsylvania · 043 Hill RD (one Wild Pla · Structure no. 000000000002418

Built
1940
85 years old, rebuilt 1980
Condition
Fair
inspected April 2023
Type
Arch - Deck
Masonry
Length
49 ft
1 main span
Daily traffic
11,200
2007 count
Owner
City
City or Municipal Highway Agency

About this bridge

Hill RD over Zoo Walkway is a masonry arch - deck carrying Hill RD over Zoo Walkway in Allegheny County, Pennsylvania. It was built in 1940 and reconstructed in 1980, so it is 85 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 11,200 vehicles a day, roughly 5% of them trucks, projected to reach 12,320 by 2020. The structure is 49 ft (14.9 m) long and 53 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesHill RD
CrossesZoo Walkway
Location043 Hill RD (one Wild Pla
RouteCity Street 0
Coordinates40.4831, -79.91981
Functional classUrban Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54 US tons
Inventory rating36 US tons

Structure

Structure typeArch - Deck
MaterialMasonry
DeckNot applicable
Main spans1
Design loadUnknown
Structure length49 ft (14.9 m)
Longest span49 ft (14.9 m)
Deck width53 ft (16.2 m)
Roadway width39 ft (12 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,200 (2007)
Projected traffic12,320 by 2020
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesPedestrian / bicycle
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 statusNot eligible for the National Register of Historic Places
Work proposedDeck rehabilitation with only incidental widening
Estimated improvement cost$95,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was Hill RD over Zoo Walkway built?

It was built in 1940, making it 85 years old in 2025. It was reconstructed in 1980.

What condition is Hill RD over Zoo Walkway 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 2023.

How much traffic does Hill RD over Zoo Walkway carry?

About 11,200 vehicles per day (2007 count), of which roughly 5% are trucks.

How long is Hill RD over Zoo Walkway?

The structure is 49 ft (14.9 m) long with a longest span of 49 ft (14.9 m) and a deck 53 ft wide.

Who owns Hill RD over Zoo Walkway?

It is owned by the City or Municipal Highway Agency.