US Bridges

Pa 309 By-Pass over Sandy Run / 3257-H10

Fair

Montgomery County, Pennsylvania · Fort Washington 3257H10 · Structure no. 000000000027371

Built
1958
67 years old, rebuilt 2006
Condition
Fair
inspected August 2023
Type
Culvert
Concrete
Length
44 ft
1 main span
Daily traffic
58,495
2023 count
Owner
State
State Highway Agency

About this bridge

Pa 309 By-Pass over Sandy Run / 3257-H10 is a concrete culvert carrying Pa 309 By-Pass over Sandy Run / 3257-H10 in Montgomery County, Pennsylvania. It was built in 1958 and reconstructed in 2006, so it is 67 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 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 58,495 vehicles a day, roughly 3% of them trucks, projected to reach 60,532 by 2032. The structure is 44 ft (13.4 m) long. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesPa 309 By-Pass
CrossesSandy Run / 3257-H10
LocationFort Washington 3257H10
RouteState Highway 309
CountyMontgomery County
StatePennsylvania
Coordinates40.12547, -75.2038
Functional classUrban Principal Arterial - Other Freeway or Expressway

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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating74 US tons
Inventory rating44 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHS 20
Structure length44 ft (13.4 m)
Longest span44 ft (13.4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic58,495 (2023)
Projected traffic60,532 by 2032
Trucks3%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 Pa 309 By-Pass over Sandy Run / 3257-H10 built?

It was built in 1958, making it 67 years old in 2025. It was reconstructed in 2006.

What condition is Pa 309 By-Pass over Sandy Run / 3257-H10 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 2023.

How much traffic does Pa 309 By-Pass over Sandy Run / 3257-H10 carry?

About 58,495 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Pa 309 By-Pass over Sandy Run / 3257-H10?

The structure is 44 ft (13.4 m) long with a longest span of 44 ft (13.4 m).

Who owns Pa 309 By-Pass over Sandy Run / 3257-H10?

It is owned by the State Highway Agency.