Delphos-st. Marys over Sixmile Creek
Auglaize County, Ohio · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Delphos-st. Marys over Sixmile Creek in Auglaize County, Ohio, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 8 (very good condition) on the 0-9 scale.
- It was built in 1988 and reconstructed in 2018, making it 37 years old at the 2025 inventory.
- It carries about 103 vehicles a day (traffic count year 2019).
- Its listed owner is the county highway agency.
- It is one of 266 of the 321 inventoried bridges in Auglaize County rated good (82.9%); 1 (0.3%) 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 April 2023, 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 → (40.62583, -84.35113)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 8 | 8 | Very good condition |
| Superstructure | 8 | 8 | Very good condition |
| Substructure | 8 | 8 | Very good condition |
Bridge details
| Structure | Prestressed concrete multiple box beam |
| Length | about 66 ft |
| Location | 5.5 Mi. N. of S.R. 66 |
| NBI structure number | 0634697 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | April 2023 |
| Inspection interval (item 91) | 24 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 Auglaize County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Ir-75 over Quaker Run | 1958 | 35,347 | Good |
| Ir-75 over Usr 33 | 1959 | 18,354 | Fair |
| Ir-75 over Usr 33 | 1959 | 18,354 | Fair |
| Ir-75 over Penn Central R.R. | 1958 | 18,354 | Good |
| Ir-75 over Penn Central R.R. | 1958 | 18,354 | Good |
| Ir-75 over Pusheta Creek | 1962 | 18,325 | Good |
All bridges nearby: Auglaize County, OH bridge conditions · every bridge in Auglaize County · Ohio bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.