US Bridges

Machamer Ave. T597 over Wiconisco Creek

Fair

Dauphin County, Pennsylvania · E Lykens/Wiconisco Crk · Structure no. 000000000014722

Built
1974
51 years old, rebuilt 2022
Condition
Fair
inspected July 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
72 ft
1 main span
Daily traffic
150
2023 count
Owner
County
County Highway Agency

About this bridge

Machamer Ave. T597 over Wiconisco Creek is a prestressed concrete box beam or girders - multiple carrying Machamer Ave. T597 over Wiconisco Creek in Dauphin County, Pennsylvania. It was built in 1974 and reconstructed in 2022, so it is 51 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 150 vehicles a day, roughly 1% of them trucks, projected to reach 210 by 2043. The structure is 72 ft (21.9 m) long and 31 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesMachamer Ave. T597
CrossesWiconisco Creek
LocationE Lykens/Wiconisco Crk
RouteCity Street 0
CountyDauphin County
StatePennsylvania
Coordinates40.57079, -76.67641
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating46 US tons
Inventory rating35.1 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length72 ft (21.9 m)
Longest span70 ft (21.3 m)
Deck width31 ft (9.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic150 (2023)
Projected traffic210 by 2043
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 Machamer Ave. T597 over Wiconisco Creek built?

It was built in 1974, making it 51 years old in 2025. It was reconstructed in 2022.

What condition is Machamer Ave. T597 over Wiconisco 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 July 2023.

How much traffic does Machamer Ave. T597 over Wiconisco Creek carry?

About 150 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is Machamer Ave. T597 over Wiconisco Creek?

The structure is 72 ft (21.9 m) long with a longest span of 70 ft (21.3 m) and a deck 31 ft wide.

Who owns Machamer Ave. T597 over Wiconisco Creek?

It is owned by the County Highway Agency.