US Bridges

Mammoth/Co Park RD over Welty Run

Fair

Westmoreland County, Pennsylvania · 150 SW of Blacksmith RD · Structure no. 000000000036948

Built
1978
47 years old
Condition
Fair
inspected June 2024
Type
Slab
Concrete
Length
26 ft
1 main span
Daily traffic
1,625
2022 count
Owner
County
County Highway Agency

About this bridge

Mammoth/Co Park RD over Welty Run is a concrete slab carrying Mammoth/Co Park RD over Welty Run 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 1,625 vehicles a day, roughly 2% of them trucks, projected to reach 2,080 by 2042. The structure is 26 ft (7.9 m) long and 33 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesMammoth/Co Park RD
CrossesWelty Run
Location150 SW of Blacksmith RD
RouteCounty Highway 0
CountyWestmoreland County
StatePennsylvania
Coordinates40.21549, -79.45125
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 inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
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 rating79 US tons
Inventory rating47 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHS 20
Structure length26 ft (7.9 m)
Longest span24 ft (7.3 m)
Deck width33 ft (10 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,625 (2022)
Projected traffic2,080 by 2042
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 Mammoth/Co Park RD over Welty Run built?

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

What condition is Mammoth/Co Park RD over Welty Run 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 June 2024.

How much traffic does Mammoth/Co Park RD over Welty Run carry?

About 1,625 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is Mammoth/Co Park RD over Welty Run?

The structure is 26 ft (7.9 m) long with a longest span of 24 ft (7.3 m) and a deck 33 ft wide.

Who owns Mammoth/Co Park RD over Welty Run?

It is owned by the County Highway Agency.