US Bridges

Lake Lynn Road over Grassy Run

Poor

Fayette County, Pennsylvania · South of Lake Lynn · Structure no. 000000000017146

Built
1949
76 years old
Condition
Poor
inspected April 2024
Type
Tee Beam
Concrete
Length
32 ft
1 main span
Daily traffic
300
2006 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Lake Lynn Road over Grassy Run is a concrete tee beam carrying Lake Lynn Road over Grassy Run in Fayette County, Pennsylvania. It was built in 1949, so it is 76 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 300 vehicles a day, roughly 5% of them trucks, projected to reach 300 by 2023. The structure is 32 ft (9.8 m) long and 33 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesLake Lynn Road
CrossesGrassy Run
LocationSouth of Lake Lynn
RouteCity Street 0T463
CountyFayette County
StatePennsylvania
Coordinates39.72306, -79.85782
Functional classUrban Local

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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionApril 2024
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 geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75.9 US tons
Inventory rating46 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length32 ft (9.8 m)
Longest span30 ft (9.1 m)
Deck width33 ft (10.1 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic300 (2006)
Projected traffic300 by 2023
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township 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$133,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Lake Lynn Road over Grassy Run built?

It was built in 1949, making it 76 years old in 2025.

What condition is Lake Lynn Road over Grassy 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 April 2024.

How much traffic does Lake Lynn Road over Grassy Run carry?

About 300 vehicles per day (2006 count), of which roughly 5% are trucks.

How long is Lake Lynn Road over Grassy Run?

The structure is 32 ft (9.8 m) long with a longest span of 30 ft (9.1 m) and a deck 33 ft wide.

Who owns Lake Lynn Road over Grassy Run?

It is owned by the Town or Township Highway Agency.