US Bridges

SR 903(LR 550) over Mud Run

Poor

Carbon County, Pennsylvania · PA903-PA534 Intersection · Structure no. 000000000009044

Built
1932
93 years old
Condition
Poor
inspected June 2023
Type
Tee Beam
Concrete
Length
87 ft
2 main spans
Daily traffic
5,877
2023 count
Owner
State
State Highway Agency

About this bridge

SR 903(LR 550) over Mud Run is a concrete tee beam carrying SR 903(LR 550) over Mud Run in Carbon County, Pennsylvania. It was built in 1932, so it is 93 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 5,877 vehicles a day, roughly 8% of them trucks, projected to reach 5,458 by 2032. The structure is 87 ft (26.5 m) long and 25 ft wide. If it were closed, the detour would be 23 mi (37 km).

Location

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CarriesSR 903(LR 550)
CrossesMud Run
LocationPA903-PA534 Intersection
RouteState Highway 903
CountyCarbon County
StatePennsylvania
Coordinates41.01658, -75.59136
Functional classRural Minor Arterial

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 inspectionJune 2023
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 geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52 US tons
Inventory rating31 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length87 ft (26.5 m)
Longest span41 ft (12.5 m)
Deck width25 ft (7.6 m)
Roadway width23 ft (7.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,877 (2023)
Projected traffic5,458 by 2032
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed23 mi (37 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$165,000
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 903(LR 550) over Mud Run built?

It was built in 1932, making it 93 years old in 2025.

What condition is SR 903(LR 550) over Mud 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 June 2023.

How much traffic does SR 903(LR 550) over Mud Run carry?

About 5,877 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is SR 903(LR 550) over Mud Run?

The structure is 87 ft (26.5 m) long with a longest span of 41 ft (12.5 m) and a deck 25 ft wide.

Who owns SR 903(LR 550) over Mud Run?

It is owned by the State Highway Agency.