US Bridges

Pa 340; Old Phila over Mill Creek

Poor

Lancaster County, Pennsylvania · 0.7 Mi. East of Smoketown · Structure no. 000000000021229

Built
1951
74 years old
Condition
Poor
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
107 ft
2 main spans
Daily traffic
10,329
2024 count
Owner
State
State Highway Agency

About this bridge

Pa 340; Old Phila over Mill Creek is a steel stringer/multi-beam or girder carrying Pa 340; Old Phila over Mill Creek in Lancaster County, Pennsylvania. It was built in 1951, so it is 74 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 10,329 vehicles a day, roughly 4% of them trucks, projected to reach 15,670 by 2032. The structure is 107 ft (32.6 m) long and 45 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

CarriesPa 340; Old Phila
CrossesMill Creek
Location0.7 Mi. East of Smoketown
RouteState Highway 340
Coordinates40.03928, -76.19349
Functional classUrban 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation4: Meets minimum tolerable limits to be 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 rating49.1 US tons
Inventory rating29 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length107 ft (32.6 m)
Longest span50 ft (15.2 m)
Deck width45 ft (13.7 m)
Roadway width38 ft (11.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,329 (2024)
Projected traffic15,670 by 2032
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed9.9 mi (16 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Pa 340; Old Phila over Mill Creek built?

It was built in 1951, making it 74 years old in 2025.

What condition is Pa 340; Old Phila over Mill Creek 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 2024.

How much traffic does Pa 340; Old Phila over Mill Creek carry?

About 10,329 vehicles per day (2024 count), of which roughly 4% are trucks.

How long is Pa 340; Old Phila over Mill Creek?

The structure is 107 ft (32.6 m) long with a longest span of 50 ft (15.2 m) and a deck 45 ft wide.

Who owns Pa 340; Old Phila over Mill Creek?

It is owned by the State Highway Agency.