Pa 764 over Mill Run
Blair County, Pennsylvania · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Pa 764 over Mill Run in Blair 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 1909 and reconstructed in 2013, making it 116 years old at the 2025 inventory.
- It carries about 11,341 vehicles a day (traffic count year 2024).
- Its listed owner is the state highway agency.
- It is one of 123 of the 338 inventoried bridges in Blair County rated good (36.4%); 39 (11.5%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its class is unchanged from 2024 (good), but component ratings moved: deck 8 to 7, superstructure 8 to 7.
- Its most recent inspection on record is dated June 2024, on a 24-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 → (40.49526, -78.41151)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 8 | 7 | Good condition |
| Superstructure | 8 | 7 | Good condition |
| Substructure | 7 | 7 | Good condition |
Bridge details
| Structure | Prestressed concrete multiple box beam |
| Length | about 27 ft |
| Location | Altoona 6TH.AVE 31ST.ST. |
| NBI structure number | 000000000005649 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | June 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 7: scour countermeasures installed |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Pennsylvania department of transportation.
Busiest bridges in Blair County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| SR 4010 (17TH St) over Brush Run | 1985 | 25,718 | Good |
| SR 4010 (17TH St) over I-99 / US 220 | 1992 | 25,718 | Good |
| SR 4010 over SR 4009_NORFOLK So. RR | 1973 | 19,273 | Fair |
| Pa 36/ Pa 164 over Everett Railroad | 1951 | 18,566 | Fair |
| Pa 36 over Halter Creek | 1997 | 17,622 | Fair |
| Pa 36/ Pa 164 over Halter Creek | 1951 | 17,622 | Fair |
All bridges nearby: Blair County, PA bridge conditions · every bridge in Blair County · Pennsylvania bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.