US Bridges

11th Street over Macoby Creek

Fair

Montgomery County, Pennsylvania · 0.2 M E RT-29 Adc 2805-C9 · Structure no. 000000000027937

Built
1906
119 years old, rebuilt 2010
Condition
Fair
inspected April 2024
Type
Arch - Deck
Masonry
Length
46 ft
2 main spans
Daily traffic
1,209
2019 count
Owner
County
County Highway Agency

About this bridge

11th Street over Macoby Creek is a masonry arch - deck carrying 11th Street over Macoby Creek in Montgomery County, Pennsylvania. It was built in 1906 and reconstructed in 2010, so it is 119 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 1,209 vehicles a day, roughly 28% of them trucks, projected to reach 4,861 by 2018. The structure is 46 ft (14 m) long and 22 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
Carries11th Street
CrossesMacoby Creek
Location0.2 M E RT-29 Adc 2805-C9
RouteCity Street 0
CountyMontgomery County
StatePennsylvania
Coordinates40.38646, -75.48481
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
Superstructure7 GoodSome minor problems.
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 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
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 rating69 US tons
Inventory rating41 US tons

Structure

Structure typeArch - Deck
MaterialMasonry
DeckNot applicable
Main spans2
Design loadUnknown
Structure length46 ft (14 m)
Longest span20 ft (6.1 m)
Deck width22 ft (6.7 m)
Roadway width17 ft (5.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,209 (2019)
Projected traffic4,861 by 2018
Trucks28%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$426,000
NavigationNo navigation control on waterway

Frequently asked questions

When was 11th Street over Macoby Creek built?

It was built in 1906, making it 119 years old in 2025. It was reconstructed in 2010.

What condition is 11th Street over Macoby 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 2024.

How much traffic does 11th Street over Macoby Creek carry?

About 1,209 vehicles per day (2019 count), of which roughly 28% are trucks.

How long is 11th Street over Macoby Creek?

The structure is 46 ft (14 m) long with a longest span of 20 ft (6.1 m) and a deck 22 ft wide.

Who owns 11th Street over Macoby Creek?

It is owned by the County Highway Agency.