US-23 over Black Mallard River
Presque Isle County, Michigan · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- US-23 over Black Mallard River in Presque Isle County, Michigan, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1940, making it 85 years old at the 2025 inventory.
- It carries about 1,261 vehicles a day (traffic count year 2022).
- Its listed owner is the state highway agency.
- It is one of 17 of the 37 inventoried bridges in Presque Isle County rated fair (45.9%); 4 (10.8%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its class is unchanged from 2024 (fair), but component ratings moved: superstructure 5 to 6.
- Its most recent inspection on record is dated June 2024, on a 23-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 → (45.53666, -84.12938)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 5 | 5 | Fair condition |
| Superstructure | 5 | 6 | Satisfactory condition |
| Substructure | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Concrete tee beam |
| Length | about 29 ft |
| Location | 9.7 Mi SE Cheboygan Col |
| NBI structure number | 000000000008966 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | June 2024 |
| Inspection interval (item 91) | 23 months |
| Scour (item 113) | 5: foundations stable, scour within the limits of the footing or piles |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Michigan department of transportation.
Busiest bridges in Presque Isle County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| M-68 over Rainy River | 1954 | 3,382 | Fair |
| M-68 over Ocqueoc River | 1954 | 3,382 | Fair |
| US-23 over Swan River | 1939 | 3,242 | Good |
| US-23|BRADLEY Hwy over Trout River | 1939 | 1,939 | Fair |
| Millerburg Road over Ocqueoc River | 1948 | 1,750 | Fair |
| M-68 over Little Ocqueoc River | 1959 | 1,564 | Good |
All bridges nearby: Presque Isle County, MI bridge conditions · every bridge in Presque Isle County · Michigan bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.