US Bridges

T-747 Old RTE 8 N over Glade Run

Fair

Butler County, Pennsylvania · Btw T492 & T490 · Structure no. 000000000008265

Built
1993
32 years old
Condition
Fair
inspected April 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
49 ft
1 main span
Daily traffic
400
2017 count
Owner
County
County Highway Agency

About this bridge

T-747 Old RTE 8 N over Glade Run is a prestressed concrete box beam or girders - multiple carrying T-747 Old RTE 8 N over Glade Run in Butler County, Pennsylvania. It was built in 1993, so it is 32 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 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 400 vehicles a day, roughly 9% of them trucks, projected to reach 500 by 2037. The structure is 49 ft (14.9 m) long and 30 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesT-747 Old RTE 8 N
CrossesGlade Run
LocationBtw T492 & T490
RouteCity Street 0
Coordinates40.72433, -79.92506
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating53 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length49 ft (14.9 m)
Longest span47 ft (14.3 m)
Deck width30 ft (9 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic400 (2017)
Projected traffic500 by 2037
Trucks9%
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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was T-747 Old RTE 8 N over Glade Run built?

It was built in 1993, making it 32 years old in 2025.

What condition is T-747 Old RTE 8 N over Glade 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 April 2023.

How much traffic does T-747 Old RTE 8 N over Glade Run carry?

About 400 vehicles per day (2017 count), of which roughly 9% are trucks.

How long is T-747 Old RTE 8 N over Glade Run?

The structure is 49 ft (14.9 m) long with a longest span of 47 ft (14.3 m) and a deck 30 ft wide.

Who owns T-747 Old RTE 8 N over Glade Run?

It is owned by the County Highway Agency.