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SR4007 over Slippery Rock Creek

Butler County, Pennsylvania · rated Good in the 2025 National Bridge Inventory

United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled August 20, 2026

SR4007 over Slippery Rock Creek in Butler County, Pennsylvania, is rated in good condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the deck, rated 7 (good condition) on the 0-9 scale.
It was built in 1996, making it 29 years old at the 2025 inventory.
It carries about 1,359 vehicles a day (traffic count year 2024).
Its listed owner is the state highway agency.
It is one of 111 of the 374 inventoried bridges in Butler County rated good (29.7%); 51 (13.6%) are rated poor.
A good rating means every major component - deck, superstructure, substructure, or culvert - is rated 7 or higher on FHWA's 0-9 scale: no more than minor problems.

Component ratings


Structure	Continuous prestressed concrete multiple box beam
Length	about 121 ft
Location	W.of Slippery Rock
NBI structure number	000000000008127
Condition class	Good

Source: FHWA National Bridge Inventory, 2025 data as reported by the Pennsylvania department of transportation.

Bridge	Built	Vehicles/day	Condition
I-79 SR8079 SR9479 over Trib to Brush Creek	1969	76,555	Fair
SR0019 Nb&sb over Coal Run	1952	43,366	Fair
SR 0228 EB & WB over I-79 Nb&sb & SR9479	2000	42,813	Good
SR0019 Nb&sb over Pa Turnpike Ramp R	2004	34,726	Good
SR0079 Nb&sb over Little Yellow Creek	1963	29,865	Fair
SR0079 Nb&sb over Black Run	1964	29,114	Fair