US Bridges

Township Road 880 over Four Mile Run

PoorPosted for load

Westmoreland County, Pennsylvania · 100 Southeast of T413 · Structure no. 000000000036897

Built
1950
75 years old, rebuilt 1999
Condition
Poor
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
25 ft
1 main span
Daily traffic
150
2024 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Township Road 880 over Four Mile Run is a steel stringer/multi-beam or girder carrying Township Road 880 over Four Mile Run in Westmoreland County, Pennsylvania. It was built in 1950 and reconstructed in 1999, so it is 75 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. Its operating status is: posted for load restriction.

It carries about 150 vehicles a day, roughly 5% of them trucks, projected to reach 190 by 2044. The structure is 25 ft (7.6 m) long and 20 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

CarriesTownship Road 880
CrossesFour Mile Run
Location100 Southeast of T413
RouteCity Street 0
Coordinates40.1533, -79.37332
Functional classRural 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating39 US tons
Inventory rating23 US tons

Structure

MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHS 25 or greater
Structure length25 ft (7.6 m)
Longest span22 ft (6.7 m)
Deck width20 ft (6.2 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic150 (2024)
Projected traffic190 by 2044
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

OwnerTown or Township Highway Agency
Maintained byTown or Township Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedDeck replacement with only incidental widening
Estimated improvement cost$119,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Township Road 880 over Four Mile Run built?

It was built in 1950, making it 75 years old in 2025. It was reconstructed in 1999.

What condition is Township Road 880 over Four Mile 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 July 2024.

How much traffic does Township Road 880 over Four Mile Run carry?

About 150 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is Township Road 880 over Four Mile Run?

The structure is 25 ft (7.6 m) long with a longest span of 22 ft (6.7 m) and a deck 20 ft wide.

Who owns Township Road 880 over Four Mile Run?

It is owned by the Town or Township Highway Agency.