US Bridges

SR 4009 (lr 39057) over Mill Creek

PoorPosted for load

Lehigh County, Pennsylvania · Hollenbachs Bridge · Structure no. 000000000023366

Built
1912
113 years old
Condition
Poor
inspected May 2023
Type
Arch - Deck
Concrete
Length
31 ft
1 main span
Daily traffic
727
2024 count
Owner
State
State Highway Agency

About this bridge

SR 4009 (lr 39057) over Mill Creek is a concrete arch - deck carrying SR 4009 (lr 39057) over Mill Creek in Lehigh County, Pennsylvania. It was built in 1912, so it is 113 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. Its operating status is: posted for other load-capacity restriction.

It carries about 727 vehicles a day, roughly 2% of them trucks, projected to reach 738 by 2032. The structure is 31 ft (9.4 m) long and 22 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesSR 4009 (lr 39057)
CrossesMill Creek
LocationHollenbachs Bridge
RouteState Highway 0
CountyLehigh County
StatePennsylvania
Coordinates40.66822, -75.64069
Functional classRural Local

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
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusPosted for other load-capacity restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36 US tons
Inventory rating24 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHS 20
Structure length31 ft (9.4 m)
Longest span31 ft (9.4 m)
Deck width22 ft (6.8 m)
Roadway width19 ft (5.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic727 (2024)
Projected traffic738 by 2032
Trucks2%
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$380,000
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 4009 (lr 39057) over Mill Creek built?

It was built in 1912, making it 113 years old in 2025.

What condition is SR 4009 (lr 39057) over Mill 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 May 2023.

How much traffic does SR 4009 (lr 39057) over Mill Creek carry?

About 727 vehicles per day (2024 count), of which roughly 2% are trucks.

How long is SR 4009 (lr 39057) over Mill Creek?

The structure is 31 ft (9.4 m) long with a longest span of 31 ft (9.4 m) and a deck 22 ft wide.

Who owns SR 4009 (lr 39057) over Mill Creek?

It is owned by the State Highway Agency.