US Bridges

Smith Road over Rock Run

Fair

Montgomery County, Pennsylvania · 1 M from Ridge RD 3254-E3 · Structure no. 000000000053472

Built
1990
35 years old
Condition
Fair
inspected August 2024
Type
Culvert
Steel
Length
22 ft
1 main span
Daily traffic
400
2016 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Smith Road over Rock Run is a steel culvert carrying Smith Road over Rock Run in Montgomery County, Pennsylvania. It was built in 1990, so it is 35 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 6 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 400 vehicles a day, roughly 2% of them trucks, projected to reach 488 by 2036. The structure is 22 ft (6.7 m) long. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesSmith Road
CrossesRock Run
Location1 M from Ridge RD 3254-E3
RouteCity Street 395
CountyMontgomery County
StatePennsylvania
Coordinates40.16909, -75.4098
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52 US tons
Inventory rating45 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans1
Design loadHS 25 or greater
Structure length22 ft (6.7 m)
Longest span22 ft (6.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic400 (2016)
Projected traffic488 by 2036
Trucks2%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollToll bridge
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Smith Road over Rock Run built?

It was built in 1990, making it 35 years old in 2025.

What condition is Smith Road over Rock 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 August 2024.

How much traffic does Smith Road over Rock Run carry?

About 400 vehicles per day (2016 count), of which roughly 2% are trucks.

How long is Smith Road over Rock Run?

The structure is 22 ft (6.7 m) long with a longest span of 22 ft (6.7 m).

Who owns Smith Road over Rock Run?

It is owned by the Town or Township Highway Agency.