T-720 Miller Road over Cowanshannock Creek
Armstrong County, Pennsylvania · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- T-720 Miller Road over Cowanshannock Creek in Armstrong County, Pennsylvania, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the superstructure, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1918, making it 107 years old at the 2025 inventory.
- It carries about 31 vehicles a day (traffic count year 2022).
- Its listed owner is a town or township highway agency.
- It is one of 150 of the 259 inventoried bridges in Armstrong County rated fair (57.9%); 18 (6.9%) 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 March 2023, on a 24-month routine inspection cycle.
- A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.
View this bridge on a map → (40.82361, -79.22982)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 5 | 5 | Fair condition |
| Substructure | 7 | 7 | Good condition |
Bridge details
| Structure | Steel stringer or multi-beam girder |
| Length | about 24 ft |
| Location | 600 feet south of SR-1026 |
| NBI structure number | 000000000003358 |
| Condition class | Fair |
| Traffic status (item 41) | Posted for load |
| Last inspection (item 90) | March 2023 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 4: foundations stable, field review says exposed foundations need protection |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Pennsylvania department of transportation.
Busiest bridges in Armstrong County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Njtpk(i-95 Pa Ext) over Delaware River & Roads | 1956 | 67,799 | Fair |
| Nj Rt 73 over Delaware River | 1929 | 42,270 | Fair |
| Co Rt 413 over Delaware River | 1931 | 26,315 | Fair |
| SR 1038 over Allegheny River | 1931 | 22,150 | Fair |
| SR0066 Nb&sb over SR0422;SR2025;GARRETTS | 1980 | 19,609 | Fair |
| SR0422 over SR0028 Nb&sb | 2001 | 18,527 | Fair |
All bridges nearby: Armstrong County, PA bridge conditions · every bridge in Armstrong County · Pennsylvania bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.