US Bridges

SR 4001 over Willis Run

Fair

York County, Pennsylvania · 1 MI South of US30 · Structure no. 000000000037944

Built
1941
84 years old
Condition
Fair
inspected September 2023
Type
Slab
Concrete
Length
49 ft
3 main spans
Daily traffic
10,700
2024 count
Owner
State
State Highway Agency

About this bridge

SR 4001 over Willis Run is a concrete slab carrying SR 4001 over Willis Run in York County, Pennsylvania. It was built in 1941, so it is 84 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 10,700 vehicles a day, roughly 4% of them trucks, projected to reach 11,758 by 2032. The structure is 49 ft (14.9 m) long and 52 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesSR 4001
CrossesWillis Run
Location1 MI South of US30
RouteState Highway 0
CountyYork County
StatePennsylvania
Coordinates39.97012, -76.75136
Functional classUrban Minor 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating46 US tons
Inventory rating27 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckNot applicable
Main spans3
Design loadHS 20
Structure length49 ft (14.9 m)
Longest span14 ft (4.3 m)
Deck width52 ft (15.8 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,700 (2024)
Projected traffic11,758 by 2032
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed6.2 mi (10 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.3 million
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 4001 over Willis Run built?

It was built in 1941, making it 84 years old in 2025.

What condition is SR 4001 over Willis 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 September 2023.

How much traffic does SR 4001 over Willis Run carry?

About 10,700 vehicles per day (2024 count), of which roughly 4% are trucks.

How long is SR 4001 over Willis Run?

The structure is 49 ft (14.9 m) long with a longest span of 14 ft (4.3 m) and a deck 52 ft wide.

Who owns SR 4001 over Willis Run?

It is owned by the State Highway Agency.