US Bridges

S Duke ST over Conestoga River

Fair

Lancaster County, Pennsylvania · SE Corner of Lanc. City · Structure no. 000000000021584

Built
1948
77 years old, rebuilt 2011
Condition
Fair
inspected November 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
297 ft
4 main spans
Daily traffic
5,921
2024 count
Owner
State
State Highway Agency

About this bridge

S Duke ST over Conestoga River is a steel continuous stringer/multi-beam or girder carrying S Duke ST over Conestoga River in Lancaster County, Pennsylvania. It was built in 1948 and reconstructed in 2011, so it is 77 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 5,921 vehicles a day, roughly 1% of them trucks, projected to reach 9,079 by 2032. The structure is 297 ft (90.5 m) long and 38 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesS Duke ST
CrossesConestoga River
LocationSE Corner of Lanc. City
RouteState Highway 0
CountyLancaster County
StatePennsylvania
Coordinates40.02367, -76.28394
Functional classUrban Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2023
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length297 ft (90.5 m)
Longest span81 ft (24.7 m)
Deck width38 ft (11.6 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,921 (2024)
Projected traffic9,079 by 2032
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.7 mi (6 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$1.4 million
NavigationNo navigation control on waterway

Frequently asked questions

When was S Duke ST over Conestoga River built?

It was built in 1948, making it 77 years old in 2025. It was reconstructed in 2011.

What condition is S Duke ST over Conestoga River 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 November 2023.

How much traffic does S Duke ST over Conestoga River carry?

About 5,921 vehicles per day (2024 count), of which roughly 1% are trucks.

How long is S Duke ST over Conestoga River?

The structure is 297 ft (90.5 m) long with a longest span of 81 ft (24.7 m) and a deck 38 ft wide.

Who owns S Duke ST over Conestoga River?

It is owned by the State Highway Agency.