US Bridges

Pa 611 (lr 166) over Slateford Creek

Poor

Northampton County, Pennsylvania · Slateford No.Delaware Dr. · Structure no. 000000000028640

Built
1909
116 years old, rebuilt 1937
Condition
Poor
inspected September 2023
Type
Culvert
Concrete
Length
33 ft
2 main spans
Daily traffic
2,941
2024 count
Owner
State
State Highway Agency

About this bridge

Pa 611 (lr 166) over Slateford Creek is a concrete culvert carrying Pa 611 (lr 166) over Slateford Creek in Northampton County, Pennsylvania. It was built in 1909 and reconstructed in 1937, so it is 116 years old, older than the Pennsylvania average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 2,941 vehicles a day, roughly 7% of them trucks, projected to reach 6,433 by 2032. The structure is 33 ft (10.1 m) long. If it were closed, the detour would be 5 mi (8 km).

Location

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CarriesPa 611 (lr 166)
CrossesSlateford Creek
LocationSlateford No.Delaware Dr.
RouteState Highway 611
CountyNorthampton County
StatePennsylvania
Coordinates40.94728, -75.11437
Functional classRural Minor Arterial

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating95 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length33 ft (10.1 m)
Longest span14 ft (4.3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,941 (2024)
Projected traffic6,433 by 2032
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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$234,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Pa 611 (lr 166) over Slateford Creek built?

It was built in 1909, making it 116 years old in 2025. It was reconstructed in 1937.

What condition is Pa 611 (lr 166) over Slateford Creek in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in September 2023.

How much traffic does Pa 611 (lr 166) over Slateford Creek carry?

About 2,941 vehicles per day (2024 count), of which roughly 7% are trucks.

How long is Pa 611 (lr 166) over Slateford Creek?

The structure is 33 ft (10.1 m) long with a longest span of 14 ft (4.3 m).

Who owns Pa 611 (lr 166) over Slateford Creek?

It is owned by the State Highway Agency.