US Bridges

T-536 Calico Road over S Br Slippery Rock CR

Fair

Butler County, Pennsylvania · 0.6MISW OFT-503(MEALS Rd) · Structure no. 000000000039986

Built
1998
27 years old
Condition
Fair
inspected December 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
32 ft
1 main span
Daily traffic
50
2018 count
Owner
County
County Highway Agency

About this bridge

T-536 Calico Road over S Br Slippery Rock CR is a steel stringer/multi-beam or girder carrying T-536 Calico Road over S Br Slippery Rock CR in Butler County, Pennsylvania. It was built in 1998, so it is 27 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 50 vehicles a day, roughly 9% of them trucks, projected to reach 70 by 2038. The structure is 32 ft (9.8 m) long and 18 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesT-536 Calico Road
CrossesS Br Slippery Rock CR
Location0.6MISW OFT-503(MEALS Rd)
RouteCity Street 0
CountyButler County
StatePennsylvania
Coordinates41.03379, -79.86489
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 inspectionDecember 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 geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating79 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length32 ft (9.8 m)
Longest span29 ft (8.8 m)
Deck width18 ft (5.5 m)
Roadway width17 ft (5.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2018)
Projected traffic70 by 2038
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-536 Calico Road over S Br Slippery Rock CR built?

It was built in 1998, making it 27 years old in 2025.

What condition is T-536 Calico Road over S Br Slippery Rock CR 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 December 2023.

How much traffic does T-536 Calico Road over S Br Slippery Rock CR carry?

About 50 vehicles per day (2018 count), of which roughly 9% are trucks.

How long is T-536 Calico Road over S Br Slippery Rock CR?

The structure is 32 ft (9.8 m) long with a longest span of 29 ft (8.8 m) and a deck 18 ft wide.

Who owns T-536 Calico Road over S Br Slippery Rock CR?

It is owned by the County Highway Agency.