M-18 over Farm Drain
Gladwin County, Michigan · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- M-18 over Farm Drain in Gladwin County, Michigan, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the superstructure, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1937 and reconstructed in 1940, making it 88 years old at the 2025 inventory.
- It carries about 5,052 vehicles a day (traffic count year 2007).
- Its listed owner is the state highway agency.
- It is one of 35 of the 63 inventoried bridges in Gladwin County rated fair (55.6%); 4 (6.3%) are rated poor.
- 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 → (43.94169, -84.50514)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Deck | 7 | Good condition |
| Superstructure | 6 | Satisfactory condition |
| Substructure | 6 | Satisfactory condition |
Bridge details
| Structure | Concrete tee beam |
| Length | about 23 ft |
| Location | 3.6 Mi SW of Gladwin |
| NBI structure number | 000000000002872 |
| Condition class | Fair |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Michigan department of transportation.
Busiest bridges in Gladwin County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| M-18|m-61|w Cedar over Cedar Creek | 2001 | 13,231 | Fair |
| M-18 over Tobacco River | 1939 | 6,100 | Poor |
| M-18 over S Br Little Sugar River | 1923 | 5,963 | Good |
| M-30 over Tobacco River | 2021 | 4,100 | Good |
| M-30 over Larabee Creek | 1977 | 3,517 | Good |
| M-61 over Tittabawassee River | 1958 | 3,302 | Fair |
All bridges nearby: Gladwin County, MI bridge conditions · every bridge in Gladwin County · Michigan bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.