US Bridges

Enlow Road over Montour Run North Branch

Fair

Allegheny County, Pennsylvania · MX01 0.2 MI N of Mcclaren · Structure no. 000000000002289

Built
1934
91 years old, rebuilt 2015
Condition
Fair
inspected October 2023
Type
Slab
Concrete
Length
30 ft
1 main span
Daily traffic
520
2015 count
Owner
County
County Highway Agency

About this bridge

Enlow Road over Montour Run North Branch is a concrete slab carrying Enlow Road over Montour Run North Branch in Allegheny County, Pennsylvania. It was built in 1934 and reconstructed in 2015, so it is 91 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 520 vehicles a day, roughly 5% of them trucks, projected to reach 750 by 2035. The structure is 30 ft (9.1 m) long and 26 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesEnlow Road
CrossesMontour Run North Branch
LocationMX01 0.2 MI N of Mcclaren
RouteCounty Highway 0
CountyAllegheny County
StatePennsylvania
Coordinates40.45823, -80.23474
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
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 inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating72 US tons
Inventory rating55 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHS 20
Structure length30 ft (9.1 m)
Longest span26 ft (7.9 m)
Deck width26 ft (7.8 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic520 (2015)
Projected traffic750 by 2035
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$188,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Enlow Road over Montour Run North Branch built?

It was built in 1934, making it 91 years old in 2025. It was reconstructed in 2015.

What condition is Enlow Road over Montour Run North Branch 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 October 2023.

How much traffic does Enlow Road over Montour Run North Branch carry?

About 520 vehicles per day (2015 count), of which roughly 5% are trucks.

How long is Enlow Road over Montour Run North Branch?

The structure is 30 ft (9.1 m) long with a longest span of 26 ft (7.9 m) and a deck 26 ft wide.

Who owns Enlow Road over Montour Run North Branch?

It is owned by the County Highway Agency.