US Bridges

Mission ST over Gomer and Greely Streets

PoorPosted for load

Allegheny County, Pennsylvania · 060 Mission ST East · Structure no. 000000000002427

Built
1939
86 years old, rebuilt 1982
Condition
Poor
inspected September 2024
Type
Girder and Floorbeam System
Steel Continuous
Length
225 ft
3 main spans
Daily traffic
650
2020 count
Owner
City
City or Municipal Highway Agency

About this bridge

Mission ST over Gomer and Greely Streets is a steel continuous girder and floorbeam system carrying Mission ST over Gomer and Greely Streets in Allegheny County, Pennsylvania. It was built in 1939 and reconstructed in 1982, so it is 86 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 650 vehicles a day, roughly 5% of them trucks, projected to reach 650 by 2042. The structure is 225 ft (68.6 m) long and 36 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesMission ST
CrossesGomer and Greely Streets
Location060 Mission ST East
RouteCity Street 0
Coordinates40.42326, -79.97432
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, 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.
Last inspectionSeptember 2024
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 geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating43 US tons
Inventory rating25 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length225 ft (68.6 m)
Longest span93 ft (28.3 m)
Deck width36 ft (11 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic650 (2020)
Projected traffic650 by 2042
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.9 mi (3 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$432,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was Mission ST over Gomer and Greely Streets built?

It was built in 1939, making it 86 years old in 2025. It was reconstructed in 1982.

What condition is Mission ST over Gomer and Greely Streets 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 September 2024.

How much traffic does Mission ST over Gomer and Greely Streets carry?

About 650 vehicles per day (2020 count), of which roughly 5% are trucks.

How long is Mission ST over Gomer and Greely Streets?

The structure is 225 ft (68.6 m) long with a longest span of 93 ft (28.3 m) and a deck 36 ft wide.

Who owns Mission ST over Gomer and Greely Streets?

It is owned by the City or Municipal Highway Agency.