US Bridges

Mcclaren & Main ST over Branch Montour Run

Poor

Allegheny County, Pennsylvania · 200N.E.STUB.PIKE-ENLOW R · Structure no. 000000000001826

Built
1948
77 years old
Condition
Poor
inspected November 2023
Type
Tee Beam
Concrete
Length
41 ft
1 main span
Daily traffic
6,349
2024 count
Owner
State
State Highway Agency

About this bridge

Mcclaren & Main ST over Branch Montour Run is a concrete tee beam carrying Mcclaren & Main ST over Branch Montour Run in Allegheny County, Pennsylvania. It was built in 1948, so it is 77 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.

It carries about 6,349 vehicles a day, roughly 4% of them trucks, projected to reach 5,039 by 2032. The structure is 41 ft (12.5 m) long and 32 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

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CarriesMcclaren & Main ST
CrossesBranch Montour Run
Location200N.E.STUB.PIKE-ENLOW R
RouteState Highway 0
CountyAllegheny County
StatePennsylvania
Coordinates40.45522, -80.23292
Functional classUrban Minor 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
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.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50 US tons
Inventory rating30 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length41 ft (12.5 m)
Longest span36 ft (11 m)
Deck width32 ft (9.8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,349 (2024)
Projected traffic5,039 by 2032
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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$252,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Mcclaren & Main ST over Branch Montour Run built?

It was built in 1948, making it 77 years old in 2025.

What condition is Mcclaren & Main ST over Branch Montour 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 November 2023.

How much traffic does Mcclaren & Main ST over Branch Montour Run carry?

About 6,349 vehicles per day (2024 count), of which roughly 4% are trucks.

How long is Mcclaren & Main ST over Branch Montour Run?

The structure is 41 ft (12.5 m) long with a longest span of 36 ft (11 m) and a deck 32 ft wide.

Who owns Mcclaren & Main ST over Branch Montour Run?

It is owned by the State Highway Agency.