US Bridges

Pa 512 (lr 48046) over Monocacy Creek

Fair

Northampton County, Pennsylvania · Beth-Bath Pike · Structure no. 000000000028605

Built
1923
102 years old
Condition
Fair
inspected January 2023
Type
Slab
Concrete Continuous
Length
47 ft
2 main spans
Daily traffic
10,672
2024 count
Owner
State
State Highway Agency

About this bridge

Pa 512 (lr 48046) over Monocacy Creek is a concrete continuous slab carrying Pa 512 (lr 48046) over Monocacy Creek in Northampton County, Pennsylvania. It was built in 1923, so it is 102 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 10,672 vehicles a day, roughly 10% of them trucks, projected to reach 15,294 by 2032. The structure is 47 ft (14.3 m) long and 26 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesPa 512 (lr 48046)
CrossesMonocacy Creek
LocationBeth-Bath Pike
RouteState Highway 512
CountyNorthampton County
StatePennsylvania
Coordinates40.69865, -75.39262
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionJanuary 2023
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 geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating61.9 US tons
Inventory rating37 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadHS 20
Structure length47 ft (14.3 m)
Longest span20 ft (6.1 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,672 (2024)
Projected traffic15,294 by 2032
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$298,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Pa 512 (lr 48046) over Monocacy Creek built?

It was built in 1923, making it 102 years old in 2025.

What condition is Pa 512 (lr 48046) over Monocacy 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 January 2023.

How much traffic does Pa 512 (lr 48046) over Monocacy Creek carry?

About 10,672 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is Pa 512 (lr 48046) over Monocacy Creek?

The structure is 47 ft (14.3 m) long with a longest span of 20 ft (6.1 m) and a deck 26 ft wide.

Who owns Pa 512 (lr 48046) over Monocacy Creek?

It is owned by the State Highway Agency.