US Bridges

Cliff Mine RD over Montour Run

Good

Allegheny County, Pennsylvania · MT14 Montour Run #14 · Structure no. 000000000040379

Built
1998
27 years old
Condition
Good
inspected March 2024
Type
Culvert
Concrete
Length
20 ft
1 main span
Daily traffic
7,310
2006 count
Owner
County
County Highway Agency

About this bridge

Cliff Mine RD over Montour Run is a concrete culvert carrying Cliff Mine RD over Montour Run in Allegheny County, Pennsylvania. It was built in 1998, so it is 27 years old, younger than the Pennsylvania average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 7,310 vehicles a day, roughly 5% of them trucks, projected to reach 8,500 by 2023. The structure is 20 ft (6.1 m) long and 39 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

CarriesCliff Mine RD
CrossesMontour Run
LocationMT14 Montour Run #14
RouteCounty Highway 0
Coordinates40.45184, -80.20555
Functional classUrban Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Culvert7 GoodSome minor problems.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68 US tons
Inventory rating41 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHS 25 or greater
Structure length20 ft (6.1 m)
Longest span20 ft (6.1 m)
Deck width39 ft (11.9 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,310 (2006)
Projected traffic8,500 by 2023
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Cliff Mine RD over Montour Run built?

It was built in 1998, making it 27 years old in 2025.

What condition is Cliff Mine RD over Montour Run in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in March 2024.

How much traffic does Cliff Mine RD over Montour Run carry?

About 7,310 vehicles per day (2006 count), of which roughly 5% are trucks.

How long is Cliff Mine RD over Montour Run?

The structure is 20 ft (6.1 m) long with a longest span of 20 ft (6.1 m) and a deck 39 ft wide.

Who owns Cliff Mine RD over Montour Run?

It is owned by the County Highway Agency.