US Bridges

Pa 147; SR 0147 over Mahantango Creek

Fair

Dauphin County, Pennsylvania · Dauphin-N.Cumberland Line · Structure no. 000000000014302

Built
1991
34 years old
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
208 ft
2 main spans
Daily traffic
2,217
2024 count
Owner
State
State Highway Agency

About this bridge

Pa 147; SR 0147 over Mahantango Creek is a prestressed concrete stringer/multi-beam or girder carrying Pa 147; SR 0147 over Mahantango Creek in Dauphin County, Pennsylvania. It was built in 1991, so it is 34 years old, younger 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 2,217 vehicles a day, roughly 5% of them trucks, projected to reach 3,172 by 2032. The structure is 208 ft (63.4 m) long and 35 ft wide. If it were closed, the detour would be 18 mi (29 km).

Location

Open in Google Maps
CarriesPa 147; SR 0147
CrossesMahantango Creek
LocationDauphin-N.Cumberland Line
RouteState Highway 147
CountyDauphin County
StatePennsylvania
Coordinates40.61201, -76.93359
Functional classRural 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating50 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 25 or greater
Structure length208 ft (63.4 m)
Longest span100 ft (30.5 m)
Deck width35 ft (10.8 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,217 (2024)
Projected traffic3,172 by 2032
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed18 mi (29 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$2.2 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Pa 147; SR 0147 over Mahantango Creek built?

It was built in 1991, making it 34 years old in 2025.

What condition is Pa 147; SR 0147 over Mahantango Creek 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 August 2024.

How much traffic does Pa 147; SR 0147 over Mahantango Creek carry?

About 2,217 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is Pa 147; SR 0147 over Mahantango Creek?

The structure is 208 ft (63.4 m) long with a longest span of 100 ft (30.5 m) and a deck 35 ft wide.

Who owns Pa 147; SR 0147 over Mahantango Creek?

It is owned by the State Highway Agency.