US Bridges

Mt Pleasant Road over Slate Run Creek

Fair

Westmoreland County, Pennsylvania · 500 N of T-309 · Structure no. 000000000056069

Built
1978
47 years old
Condition
Fair
inspected April 2023
Type
Slab
Concrete
Length
23 ft
1 main span
Daily traffic
7,037
2023 count
Owner
County
County Highway Agency

About this bridge

Mt Pleasant Road over Slate Run Creek is a concrete slab carrying Mt Pleasant Road over Slate Run Creek in Westmoreland County, Pennsylvania. It was built in 1978, so it is 47 years old, younger 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 5 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 7,037 vehicles a day, roughly 6% of them trucks, projected to reach 7,037 by 2043. The structure is 23 ft (7 m) long and 31 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesMt Pleasant Road
CrossesSlate Run Creek
Location500 N of T-309
RouteCounty Highway 6401
CountyWestmoreland County
StatePennsylvania
Coordinates40.2775, -79.52839
Functional classRural 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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating74 US tons
Inventory rating44 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length23 ft (7 m)
Longest span22 ft (6.7 m)
Deck width31 ft (9.6 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,037 (2023)
Projected traffic7,037 by 2043
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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 proposedOther structural work, including hydraulic replacements
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Mt Pleasant Road over Slate Run Creek built?

It was built in 1978, making it 47 years old in 2025.

What condition is Mt Pleasant Road over Slate Run Creek 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 April 2023.

How much traffic does Mt Pleasant Road over Slate Run Creek carry?

About 7,037 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is Mt Pleasant Road over Slate Run Creek?

The structure is 23 ft (7 m) long with a longest span of 22 ft (6.7 m) and a deck 31 ft wide.

Who owns Mt Pleasant Road over Slate Run Creek?

It is owned by the County Highway Agency.