US Bridges

Main Street over Mine Run

Fair

Montgomery County, Pennsylvania · Schwenksville 3029F09 · Structure no. 000000000027160

Built
1928
97 years old
Condition
Fair
inspected April 2023
Type
Arch - Deck
Masonry
Length
26 ft
1 main span
Daily traffic
9,235
2023 count
Owner
State
State Highway Agency

About this bridge

Main Street over Mine Run is a masonry arch - deck carrying Main Street over Mine Run in Montgomery County, Pennsylvania. It was built in 1928, so it is 97 years old, older 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 5 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 9,235 vehicles a day, roughly 8% of them trucks, projected to reach 16,287 by 2032. The structure is 26 ft (7.9 m) long and 50 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesMain Street
CrossesMine Run
LocationSchwenksville 3029F09
RouteState Highway 29
CountyMontgomery County
StatePennsylvania
Coordinates40.25966, -75.46496
Functional classUrban Other Principal Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being 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 alignment8: Equal to present desirable criteria
Operating rating70 US tons
Inventory rating35.1 US tons

Structure

Structure typeArch - Deck
MaterialMasonry
DeckNot applicable
Main spans1
Design loadH 15
Structure length26 ft (7.9 m)
Longest span26 ft (7.9 m)
Deck width50 ft (15.2 m)
Roadway width35 ft (10.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,235 (2023)
Projected traffic16,287 by 2032
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed6.8 mi (11 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 Main Street over Mine Run built?

It was built in 1928, making it 97 years old in 2025.

What condition is Main Street over Mine 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 April 2023.

How much traffic does Main Street over Mine Run carry?

About 9,235 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is Main Street over Mine Run?

The structure is 26 ft (7.9 m) long with a longest span of 26 ft (7.9 m) and a deck 50 ft wide.

Who owns Main Street over Mine Run?

It is owned by the State Highway Agency.