US Bridges

Mill Road over Tacony Creek

Fair

Montgomery County, Pennsylvania · 0.5 MI E SR611 3371-A9 · Structure no. 000000000028012

Built
1930
95 years old
Condition
Fair
inspected July 2024
Type
Arch - Deck
Concrete
Length
49 ft
1 main span
Daily traffic
800
2018 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Mill Road over Tacony Creek is a concrete arch - deck carrying Mill Road over Tacony Creek in Montgomery County, Pennsylvania. It was built in 1930, so it is 95 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 6 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 800 vehicles a day, roughly 2% of them trucks, projected to reach 1,000 by 2038. The structure is 49 ft (14.9 m) long and 33 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesMill Road
CrossesTacony Creek
Location0.5 MI E SR611 3371-A9
RouteCity Street 0
Coordinates40.0712, -75.122
Functional classUrban 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
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54 US tons
Inventory rating36 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckNot applicable
Main spans1
Design loadUnknown
Structure length49 ft (14.9 m)
Longest span35 ft (10.7 m)
Deck width33 ft (10.1 m)
Roadway width23 ft (6.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic800 (2018)
Projected traffic1,000 by 2038
Trucks2%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township 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$325,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Mill Road over Tacony Creek built?

It was built in 1930, making it 95 years old in 2025.

What condition is Mill Road over Tacony 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 July 2024.

How much traffic does Mill Road over Tacony Creek carry?

About 800 vehicles per day (2018 count), of which roughly 2% are trucks.

How long is Mill Road over Tacony Creek?

The structure is 49 ft (14.9 m) long with a longest span of 35 ft (10.7 m) and a deck 33 ft wide.

Who owns Mill Road over Tacony Creek?

It is owned by the Town or Township Highway Agency.