US Bridges

SR 4035 over Lyons Run

PoorPosted for load

Westmoreland County, Pennsylvania · Penn Twp./Murrysville · Structure no. 000000000036735

Built
1952
73 years old
Condition
Poor
inspected February 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
33 ft
1 main span
Daily traffic
9,150
2024 count
Owner
State
State Highway Agency

About this bridge

SR 4035 over Lyons Run is a steel stringer/multi-beam or girder carrying SR 4035 over Lyons Run in Westmoreland County, Pennsylvania. It was built in 1952, so it is 73 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 9,150 vehicles a day, roughly 3% of them trucks, projected to reach 9,000 by 2043. The structure is 33 ft (10.1 m) long and 26 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesSR 4035
CrossesLyons Run
LocationPenn Twp./Murrysville
RouteState Highway 0
Coordinates40.35447, -79.6771
Functional classRural Major Collector

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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be 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 rating41 US tons
Inventory rating24 US tons

Structure

MaterialSteel
DeckClosed grating
Main spans1
Design loadHS 20 + Mod
Structure length33 ft (10.1 m)
Longest span31 ft (9.4 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,150 (2024)
Projected traffic9,000 by 2043
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$43,000
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 4035 over Lyons Run built?

It was built in 1952, making it 73 years old in 2025.

What condition is SR 4035 over Lyons 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 February 2024.

How much traffic does SR 4035 over Lyons Run carry?

About 9,150 vehicles per day (2024 count), of which roughly 3% are trucks.

How long is SR 4035 over Lyons Run?

The structure is 33 ft (10.1 m) long with a longest span of 31 ft (9.4 m) and a deck 26 ft wide.

Who owns SR 4035 over Lyons Run?

It is owned by the State Highway Agency.