Pa 523 over Casselman River
Somerset County, Pennsylvania · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Pa 523 over Casselman River in Somerset County, Pennsylvania, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 7 (good condition) on the 0-9 scale.
- It was built in 2002, making it 23 years old at the 2025 inventory.
- It carries about 1,120 vehicles a day (traffic count year 2024).
- Its listed owner is the state highway agency.
- It is one of 153 of the 455 inventoried bridges in Somerset County rated good (33.6%); 60 (13.2%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated September 2022, on a 48-month routine inspection cycle.
- 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.
View this bridge on a map → (39.79449, -79.32331)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 7 | 7 | Good condition |
| Substructure | 7 | 7 | Good condition |
Bridge details
| Structure | Prestressed concrete stringer or multi-beam girder |
| Length | about 257 ft |
| Location | Harnedsville |
| NBI structure number | 000000000041569 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | September 2022 |
| Inspection interval (item 91) | 48 months |
| Scour (item 113) | 8: foundations stable, scour above the top of the footing |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Pennsylvania department of transportation.
Busiest bridges in Somerset County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Pa Tpk (I-76) over Branch Coxes Crk | 2004 | 32,134 | Good |
| Pa Tpk (I-76) over Crab Run | 1939 | 31,991 | Fair |
| Pa Tpk (I-76) over Three Lick Run | 1939 | 31,200 | Fair |
| Pa Tpk (I-76) over T-782 | 1939 | 31,200 | Fair |
| Pa Tpk (I-76) over Branch of Coxes Creek | 1939 | 30,880 | Fair |
| Pa Tpk (I-76) over Trib to Coxes Creek | 1939 | 30,880 | Fair |
All bridges nearby: Somerset County, PA bridge conditions · every bridge in Somerset County · Pennsylvania bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.