US Bridges

Grant Avenue over Girtys Run

PoorPosted for load

Allegheny County, Pennsylvania · Int Grant Ave North Ave · Structure no. 000000000002622

Built
1914
111 years old, rebuilt 1986
Condition
Poor
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
30 ft
1 main span
Daily traffic
4,500
2024 count
Owner
City
City or Municipal Highway Agency

About this bridge

Grant Avenue over Girtys Run is a steel stringer/multi-beam or girder carrying Grant Avenue over Girtys Run in Allegheny County, Pennsylvania. It was built in 1914 and reconstructed in 1986, so it is 111 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 4,500 vehicles a day, roughly 6% of them trucks, projected to reach 4,500 by 2044. The structure is 30 ft (9.1 m) long and 50 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesGrant Avenue
CrossesGirtys Run
LocationInt Grant Ave North Ave
RouteCity Street 0
Coordinates40.48075, -79.97467
Functional classUrban Other Principal Arterial

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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating12 US tons
Inventory rating7.1 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length30 ft (9.1 m)
Longest span28 ft (8.5 m)
Deck width50 ft (15.1 m)
Roadway width32 ft (9.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,500 (2024)
Projected traffic4,500 by 2044
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes

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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$117,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Grant Avenue over Girtys Run built?

It was built in 1914, making it 111 years old in 2025. It was reconstructed in 1986.

What condition is Grant Avenue over Girtys Run 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 April 2023.

How much traffic does Grant Avenue over Girtys Run carry?

About 4,500 vehicles per day (2024 count), of which roughly 6% are trucks.

How long is Grant Avenue over Girtys Run?

The structure is 30 ft (9.1 m) long with a longest span of 28 ft (8.5 m) and a deck 50 ft wide.

Who owns Grant Avenue over Girtys Run?

It is owned by the City or Municipal Highway Agency.