Mcconnels Mill Rd over Slippery Rock Creek
Lawrence County, Pennsylvania · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Mcconnels Mill Rd over Slippery Rock Creek in Lawrence County, Pennsylvania, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the superstructure, rated 4 (poor condition) on the 0-9 scale.
- It was built in 1875, making it 150 years old at the 2025 inventory.
- It carries about 150 vehicles a day (traffic count year 2006).
- Its listed owner is the county highway agency.
- It is one of 30 of the 266 inventoried bridges in Lawrence County rated poor (11.3%); 30 (11.3%) are rated poor.
- Its traffic status in the 2025 inventory is posted for load (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated September 2024, on a 24-month routine inspection cycle.
- It has fracture-critical members (NBI item 92A): steel tension members without a redundant load path, which get their own scheduled inspections.
- A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.
View this bridge on a map → (40.95293, -80.17029)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 5 | 5 | Fair condition |
| Superstructure | 4 | 4 | Poor condition |
| Substructure | 5 | 5 | Fair condition |
Bridge details
| Structure | Steel girder and floorbeam |
| Length | about 100 ft |
| Location | 037020 Slippery Rock Twp |
| NBI structure number | 000000000022561 |
| Condition class | Poor |
| Traffic status (item 41) | Posted for load |
| Last inspection (item 90) | September 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 8: foundations stable, scour above the top of the footing |
| Fracture critical (item 92A) | Yes |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Pennsylvania department of transportation.
Busiest bridges in Lawrence County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Pa Tpk (I-76) over T-306 | 2006 | 21,767 | Good |
| Pa Turnpike (I-76) over Honey Creek;wb-101 | 2008 | 21,767 | Good |
| Pa Turnpike(i-76) over LR37056 SR 3002;wb-102 | 2008 | 21,767 | Good |
| Pa Turnpike (I-76) over Beaver Dam Run | 2008 | 21,767 | Good |
| Pa Turnpike (I-76) over N Fork Little Beaver Ck | 1952 | 21,767 | Fair |
| Pa Tpk (I-376) over Jenkins Run | 1992 | 19,742 | Fair |
All bridges nearby: Lawrence County, PA bridge conditions · every bridge in Lawrence County · Pennsylvania bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.