US Bridges

SR 147 over Mahanoy Creek.

Fair

Northumberland County, Pennsylvania · 1 MI N of Herndon · Structure no. 000000000029038

Built
1983
42 years old
Condition
Fair
inspected May 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
237 ft
3 main spans
Daily traffic
3,464
2024 count
Owner
State
State Highway Agency

About this bridge

SR 147 over Mahanoy Creek. is a prestressed concrete box beam or girders - multiple carrying SR 147 over Mahanoy Creek. in Northumberland County, Pennsylvania. It was built in 1983, so it is 42 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 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 3,464 vehicles a day, roughly 12% of them trucks, projected to reach 4,072 by 2032. The structure is 237 ft (72.2 m) long and 44 ft wide. If it were closed, the detour would be 37.9 mi (61 km).

Location

Open in Google Maps
CarriesSR 147
CrossesMahanoy Creek.
Location1 MI N of Herndon
RouteState Highway 147
CountyNorthumberland County
StatePennsylvania
Coordinates40.72626, -76.83763
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating54 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length237 ft (72.2 m)
Longest span77 ft (23.5 m)
Deck width44 ft (13.3 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,464 (2024)
Projected traffic4,072 by 2032
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed37.9 mi (61 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 SR 147 over Mahanoy Creek. built?

It was built in 1983, making it 42 years old in 2025.

What condition is SR 147 over Mahanoy 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 May 2024.

How much traffic does SR 147 over Mahanoy Creek. carry?

About 3,464 vehicles per day (2024 count), of which roughly 12% are trucks.

How long is SR 147 over Mahanoy Creek.?

The structure is 237 ft (72.2 m) long with a longest span of 77 ft (23.5 m) and a deck 44 ft wide.

Who owns SR 147 over Mahanoy Creek.?

It is owned by the State Highway Agency.