SR 81 over Patterson Ditch
Allen County, Ohio · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- SR 81 over Patterson Ditch in Allen County, Ohio, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1949, making it 76 years old at the 2025 inventory.
- It carries about 3,172 vehicles a day (traffic count year 2015).
- Its listed owner is the state highway agency.
- It is one of 79 of the 364 inventoried bridges in Allen County rated fair (21.7%); 33 (9.1%) 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 October 2024, on a 12-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 → (40.76398, -83.98064)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 7 | 7 | Good condition |
| Substructure | 5 | 5 | Fair condition |
Bridge details
| Structure | Concrete slab |
| Length | about 26 ft |
| Location | 5.0 mi. East of IR 75 |
| NBI structure number | 0203483 |
| Condition class | Fair |
| Traffic status (item 41) | Posted for load |
| Last inspection (item 90) | October 2024 |
| Inspection interval (item 91) | 12 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 Ohio department of transportation.
Busiest bridges in Allen County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Ir 75 over Lost Creek | 2014 | 39,060 | Good |
| Ir 75 SB over SR 65 | 2015 | 22,650 | Good |
| Ir 75 NB over SR 65 | 2016 | 22,650 | Good |
| Ir 75 SB over I & O RR | 2015 | 22,650 | Good |
| Ir 75 NB over I & O RR | 2016 | 22,650 | Good |
| SR 117 over Branch of Lost Creek | 2013 | 21,540 | Good |
All bridges nearby: Allen County, OH bridge conditions · every bridge in Allen County · Ohio bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.