US Bridges

Blair Mill Road over Branch Pennypack Creek

Fair

Montgomery County, Pennsylvania · Upper Moreland 3259B01 · Structure no. 000000000027642

Built
1973
52 years old
Condition
Fair
inspected October 2022
Type
Slab
Prestressed Concrete
Length
46 ft
2 main spans
Daily traffic
11,408
2024 count
Owner
State
State Highway Agency

About this bridge

Blair Mill Road over Branch Pennypack Creek is a prestressed concrete slab carrying Blair Mill Road over Branch Pennypack Creek in Montgomery County, Pennsylvania. It was built in 1973, so it is 52 years old, younger 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 11,408 vehicles a day, roughly 6% of them trucks, projected to reach 20,069 by 2032. The structure is 46 ft (14 m) long and 53 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesBlair Mill Road
CrossesBranch Pennypack Creek
LocationUpper Moreland 3259B01
RouteState Highway 0
CountyMontgomery County
StatePennsylvania
Coordinates40.18622, -75.11288
Functional classUrban Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionOctober 2022
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment8: Equal to present desirable criteria
Operating rating96 US tons
Inventory rating54 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length46 ft (14 m)
Longest span22 ft (6.7 m)
Deck width53 ft (16.1 m)
Roadway width40 ft (12.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic11,408 (2024)
Projected traffic20,069 by 2032
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Blair Mill Road over Branch Pennypack Creek built?

It was built in 1973, making it 52 years old in 2025.

What condition is Blair Mill Road over Branch Pennypack 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 October 2022.

How much traffic does Blair Mill Road over Branch Pennypack Creek carry?

About 11,408 vehicles per day (2024 count), of which roughly 6% are trucks.

How long is Blair Mill Road over Branch Pennypack Creek?

The structure is 46 ft (14 m) long with a longest span of 22 ft (6.7 m) and a deck 53 ft wide.

Who owns Blair Mill Road over Branch Pennypack Creek?

It is owned by the State Highway Agency.