US Bridges

Northampton St. over West Monocacy Creek

FairPosted for load

Northampton County, Pennsylvania · 0.1 M. West of Pa 987 · Structure no. 000000000028920

Built
1934
91 years old
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
32 ft
1 main span
Daily traffic
700
2010 count
Owner
County
County Highway Agency

About this bridge

Northampton St. over West Monocacy Creek is a steel stringer/multi-beam or girder carrying Northampton St. over West Monocacy Creek in Northampton County, Pennsylvania. It was built in 1934, so it is 91 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. Its operating status is: posted for load restriction.

It carries about 700 vehicles a day, roughly 1% of them trucks, projected to reach 1,775 by 2030. The structure is 32 ft (9.8 m) long and 48 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesNorthampton St.
CrossesWest Monocacy Creek
Location0.1 M. West of Pa 987
RouteCity Street 0
Coordinates40.72694, -75.39526
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
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusPosted for load 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 adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating55 US tons
Inventory rating33 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length32 ft (9.8 m)
Longest span30 ft (9.1 m)
Deck width48 ft (14.6 m)
Roadway width33 ft (10.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic700 (2010)
Projected traffic1,775 by 2030
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 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 Northampton St. over West Monocacy Creek built?

It was built in 1934, making it 91 years old in 2025.

What condition is Northampton St. over West 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 April 2023.

How much traffic does Northampton St. over West Monocacy Creek carry?

About 700 vehicles per day (2010 count), of which roughly 1% are trucks.

How long is Northampton St. over West Monocacy Creek?

The structure is 32 ft (9.8 m) long with a longest span of 30 ft (9.1 m) and a deck 48 ft wide.

Who owns Northampton St. over West Monocacy Creek?

It is owned by the County Highway Agency.