Lewiston Grade Rd over E Branch Au Sable River
Crawford County, Michigan · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Lewiston Grade Rd over E Branch Au Sable River in Crawford County, Michigan, 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 1960 and reconstructed in 2000, making it 65 years old at the 2025 inventory.
- It carries about 15 vehicles a day (traffic count year 1999).
- Its listed owner is the county highway agency.
- It is one of 9 of the 55 inventoried bridges in Crawford County rated good (16.4%); 6 (10.9%) are rated poor.
- 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 → (44.73576, -84.64174)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 8 | Very good condition |
| Superstructure | 8 | Very good condition |
| Substructure | 8 | Very good condition |
Bridge details
| Structure | Timber slab |
| Length | about 21 ft |
| Location | 5 Mi. NE Grayling |
| NBI structure number | 000000000002071 |
| Condition class | Good |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Michigan department of transportation.
Busiest bridges in Crawford County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-75bl|m-72|n Jame over Au Sable River | 1935 | 13,375 | Fair |
| M-72|m-93 over Au Sable River | 1993 | 11,731 | Fair |
| I-75 SB over S Grayling Rd | 1970 | 11,000 | Fair |
| I-75 NB over S Grayling Rd | 1970 | 11,000 | Fair |
| I-75 NB over E Br Au Sable River | 1961 | 9,772 | Fair |
| I-75 NB over Lewiston Grade Road | 1961 | 9,772 | Fair |
All bridges nearby: Crawford County, MI bridge conditions · every bridge in Crawford County · Michigan bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.