US Bridges

Pa 309 By-Pass over Paper Mill Road

Good

Montgomery County, Pennsylvania · Enfield 3369J04 · Structure no. 000000000027364

Built
1960
65 years old, rebuilt 2006
Condition
Good
inspected September 2022
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
153 ft
3 main spans
Daily traffic
61,488
2023 count
Owner
State
State Highway Agency

About this bridge

Pa 309 By-Pass over Paper Mill Road is a steel continuous stringer/multi-beam or girder carrying Pa 309 By-Pass over Paper Mill Road in Montgomery County, Pennsylvania. It was built in 1960 and reconstructed in 2006, so it is 65 years old, older than the Pennsylvania average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 61,488 vehicles a day, roughly 3% of them trucks, projected to reach 59,296 by 2032. The structure is 153 ft (46.6 m) long and 90 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesPa 309 By-Pass
CrossesPaper Mill Road
LocationEnfield 3369J04
RouteState Highway 309
Coordinates40.10184, -75.19374
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Last inspectionSeptember 2022
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating68 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length153 ft (46.6 m)
Longest span69 ft (21 m)
Deck width90 ft (27.4 m)
Roadway width68 ft (20.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic61,488 (2023)
Projected traffic59,296 by 2032
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 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—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Pa 309 By-Pass over Paper Mill Road built?

It was built in 1960, making it 65 years old in 2025. It was reconstructed in 2006.

What condition is Pa 309 By-Pass over Paper Mill Road in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in September 2022.

How much traffic does Pa 309 By-Pass over Paper Mill Road carry?

About 61,488 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Pa 309 By-Pass over Paper Mill Road?

The structure is 153 ft (46.6 m) long with a longest span of 69 ft (21 m) and a deck 90 ft wide.

Who owns Pa 309 By-Pass over Paper Mill Road?

It is owned by the State Highway Agency.