US Bridges

Pa 147; SR 0147 over Armstrong Creek

Fair

Dauphin County, Pennsylvania · Half MI N of Halifax Boro · Structure no. 000000000014295

Built
1921
104 years old, rebuilt 1954
Condition
Fair
inspected August 2024
Type
Tee Beam
Concrete
Length
70 ft
2 main spans
Daily traffic
6,189
2023 count
Owner
State
State Highway Agency

About this bridge

Pa 147; SR 0147 over Armstrong Creek is a concrete tee beam carrying Pa 147; SR 0147 over Armstrong Creek in Dauphin County, Pennsylvania. It was built in 1921 and reconstructed in 1954, so it is 104 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 6,189 vehicles a day, roughly 7% of them trucks, projected to reach 8,460 by 2032. The structure is 70 ft (21.3 m) long and 41 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

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CarriesPa 147; SR 0147
CrossesArmstrong Creek
LocationHalf MI N of Halifax Boro
RouteState Highway 147
CountyDauphin County
StatePennsylvania
Coordinates40.48415, -76.93197
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
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 adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating57 US tons
Inventory rating34 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadH 15
Structure length70 ft (21.3 m)
Longest span32 ft (9.8 m)
Deck width41 ft (12.5 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,189 (2023)
Projected traffic8,460 by 2032
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 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 Pa 147; SR 0147 over Armstrong Creek built?

It was built in 1921, making it 104 years old in 2025. It was reconstructed in 1954.

What condition is Pa 147; SR 0147 over Armstrong 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 Armstrong Creek carry?

About 6,189 vehicles per day (2023 count), of which roughly 7% are trucks.

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

The structure is 70 ft (21.3 m) long with a longest span of 32 ft (9.8 m) and a deck 41 ft wide.

Who owns Pa 147; SR 0147 over Armstrong Creek?

It is owned by the State Highway Agency.