US Bridges

Downyflake Lane over Norfolk Southern RR

Good

Lehigh County, Pennsylvania · Queen City Airport · Structure no. 000000000023502

Built
1987
38 years old
Condition
Good
inspected June 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
170 ft
3 main spans
Daily traffic
3,310
1987 count
Owner
City
City or Municipal Highway Agency

About this bridge

Downyflake Lane over Norfolk Southern RR is a prestressed concrete box beam or girders - multiple carrying Downyflake Lane over Norfolk Southern RR in Lehigh County, Pennsylvania. It was built in 1987, so it is 38 years old, younger than the Pennsylvania average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 3,310 vehicles a day, roughly 10% of them trucks, projected to reach 7,307 by 2030. The structure is 170 ft (51.8 m) long and 51 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesDownyflake Lane
CrossesNorfolk Southern RR
LocationQueen City Airport
RouteCity Street 0
Coordinates40.57194, -75.47861
Functional classUrban Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating75.9 US tons
Inventory rating41 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length170 ft (51.8 m)
Longest span53 ft (16.2 m)
Deck width51 ft (15.5 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,310 (1987)
Projected traffic7,307 by 2030
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesRailroad
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Downyflake Lane over Norfolk Southern RR built?

It was built in 1987, making it 38 years old in 2025.

What condition is Downyflake Lane over Norfolk Southern RR in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in June 2024.

How much traffic does Downyflake Lane over Norfolk Southern RR carry?

About 3,310 vehicles per day (1987 count), of which roughly 10% are trucks.

How long is Downyflake Lane over Norfolk Southern RR?

The structure is 170 ft (51.8 m) long with a longest span of 53 ft (16.2 m) and a deck 51 ft wide.

Who owns Downyflake Lane over Norfolk Southern RR?

It is owned by the City or Municipal Highway Agency.