US Bridges

Pa 147; Market St. over Shippen Run

Poor

Dauphin County, Pennsylvania · Millersburg · Structure no. 000000000014300

Built
1920
105 years old
Condition
Poor
inspected April 2024
Type
Culvert
Masonry
Length
20 ft
1 main span
Daily traffic
4,055
2023 count
Owner
State
State Highway Agency

About this bridge

Pa 147; Market St. over Shippen Run is a masonry culvert carrying Pa 147; Market St. over Shippen Run in Dauphin County, Pennsylvania. It was built in 1920, so it is 105 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 3 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 4,055 vehicles a day, roughly 7% of them trucks, projected to reach 6,187 by 2032. The structure is 20 ft (6.1 m) long. If it were closed, the detour would be 6.8 mi (11 km).

Location

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CarriesPa 147; Market St.
CrossesShippen Run
LocationMillersburg
RouteState Highway 147
CountyDauphin County
StatePennsylvania
Coordinates40.54386, -76.96239
Functional classRural 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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Last inspectionApril 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54 US tons
Inventory rating36 US tons

Structure

Structure typeCulvert
MaterialMasonry
DeckNot applicable
Main spans1
Design loadUnknown
Structure length20 ft (6.1 m)
Longest span20 ft (6.1 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,055 (2023)
Projected traffic6,187 by 2032
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed6.8 mi (11 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 147; Market St. over Shippen Run built?

It was built in 1920, making it 105 years old in 2025.

What condition is Pa 147; Market St. over Shippen Run 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 April 2024.

How much traffic does Pa 147; Market St. over Shippen Run carry?

About 4,055 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is Pa 147; Market St. over Shippen Run?

The structure is 20 ft (6.1 m) long with a longest span of 20 ft (6.1 m).

Who owns Pa 147; Market St. over Shippen Run?

It is owned by the State Highway Agency.