US Bridges

SR 4006 over Slippery Rock Crk.

Good

Butler County, Pennsylvania · 0.6 MI E SR 8 Inter. · Structure no. 000000000048070

Built
2013
12 years old
Condition
Good
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
123 ft
1 main span
Daily traffic
231
2024 count
Owner
State
State Highway Agency

About this bridge

SR 4006 over Slippery Rock Crk. is a steel stringer/multi-beam or girder carrying SR 4006 over Slippery Rock Crk. in Butler County, Pennsylvania. It was built in 2013, so it is 12 years old, younger than the Pennsylvania average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 231 vehicles a day, roughly 13% of them trucks, projected to reach 343 by 2032. The structure is 123 ft (37.5 m) long and 31 ft wide. If it were closed, the detour would be 19.9 mi (32 km).

Location

Open in Google Maps
CarriesSR 4006
CrossesSlippery Rock Crk.
Location0.6 MI E SR 8 Inter.
RouteState Highway 0
CountyButler County
StatePennsylvania
Coordinates41.04742, -79.99764
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating64.3 US tons
Inventory rating48.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length123 ft (37.5 m)
Longest span120 ft (36.6 m)
Deck width31 ft (9.6 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic231 (2024)
Projected traffic343 by 2032
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.9 mi (32 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 SR 4006 over Slippery Rock Crk. built?

It was built in 2013, making it 12 years old in 2025.

What condition is SR 4006 over Slippery Rock Crk. in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in September 2024.

How much traffic does SR 4006 over Slippery Rock Crk. carry?

About 231 vehicles per day (2024 count), of which roughly 13% are trucks.

How long is SR 4006 over Slippery Rock Crk.?

The structure is 123 ft (37.5 m) long with a longest span of 120 ft (36.6 m) and a deck 31 ft wide.

Who owns SR 4006 over Slippery Rock Crk.?

It is owned by the State Highway Agency.