Irr Bia Rte 1162 over Drainage to Horton Creek
Charlevoix County, Michigan · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Irr Bia Rte 1162 over Drainage to Horton Creek in Charlevoix County, Michigan, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 7 (good condition) on the 0-9 scale.
- It was built in 2009, making it 16 years old at the 2025 inventory.
- It carries about 50 vehicles a day (traffic count year 2023).
- It is one of 7 of the 18 inventoried bridges in Charlevoix County rated good (38.9%); 2 (11.1%) 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 August 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 → (45.35392, -85.11917)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Culvert | 7 | 7 | Good condition |
Bridge details
| Structure | Concrete culvert |
| Length | about 27 ft |
| Location | Little Traverse Bay |
| NBI structure number | 0000F60483B0001 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | August 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 Michigan department of transportation.
Busiest bridges in Charlevoix County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US-31 over Pine River | 1949 | 15,321 | Fair |
| US-131 over Boyne River | 1947 | 6,736 | Fair |
| M-75|s East St over Boyne River | 1974 | 6,546 | Fair |
| Park Street over Boyne River | 1991 | 5,000 | Fair |
| M-32|water St over S Arm Lake Charlevoix | 1959 | 4,600 | Fair |
| Lake Street over Boyne River | 1959 | 3,000 | Fair |
All bridges nearby: Charlevoix County, MI bridge conditions · every bridge in Charlevoix County · Michigan bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.