US Bridges

Glenroy ROAD(T306) over Blackburn Run

FairPosted for load

Chester County, Pennsylvania · .4 MI N of PA-272 3906-C7 · Structure no. 000000000010642

Built
1934
91 years old
Condition
Fair
inspected May 2024
Type
Slab
Concrete Continuous
Length
42 ft
2 main spans
Daily traffic
7
2019 count
Owner
County
County Highway Agency

About this bridge

Glenroy ROAD(T306) over Blackburn Run is a concrete continuous slab carrying Glenroy ROAD(T306) over Blackburn Run in Chester County, Pennsylvania. It was built in 1934, so it is 91 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. Its operating status is: posted for load restriction.

It carries about 7 vehicles a day, projected to reach 9 by 2039. The structure is 42 ft (12.8 m) long and 22 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

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CarriesGlenroy ROAD(T306)
CrossesBlackburn Run
Location.4 MI N of PA-272 3906-C7
RouteCity Street 0
CountyChester County
StatePennsylvania
Coordinates39.77235, -76.04788
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 inspectionMay 2024
Inspection intervalevery 24 months
Operating statusPosted for load 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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating31 US tons
Inventory rating18 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length42 ft (12.8 m)
Longest span18 ft (5.5 m)
Deck width22 ft (6.7 m)
Roadway width19 ft (5.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7 (2019)
Projected traffic9 by 2039
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$240,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Glenroy ROAD(T306) over Blackburn Run built?

It was built in 1934, making it 91 years old in 2025.

What condition is Glenroy ROAD(T306) over Blackburn Run 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 May 2024.

How much traffic does Glenroy ROAD(T306) over Blackburn Run carry?

About 7 vehicles per day (2019 count).

How long is Glenroy ROAD(T306) over Blackburn Run?

The structure is 42 ft (12.8 m) long with a longest span of 18 ft (5.5 m) and a deck 22 ft wide.

Who owns Glenroy ROAD(T306) over Blackburn Run?

It is owned by the County Highway Agency.