M-30 over Tittabawassee River
Gladwin County, Michigan · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- M-30 over Tittabawassee River in Gladwin 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 1928 and reconstructed in 1986, making it 97 years old at the 2025 inventory.
- It carries about 2,536 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.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- It was rated poor in the 2024 inventory and is now fair (superstructure 4 to 5).
- Its most recent inspection on record is dated June 2024, on a 24-month routine inspection cycle.
- It is coded scour critical (NBI item 113 = 3): scour critical: foundations unstable for the assessed or calculated scour.
- 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 → (44.15596, -84.2912)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 5 | 5 | Fair condition |
| Superstructure | 4 | 5 | Fair condition |
| Substructure | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Steel stringer or multi-beam girder |
| Length | about 62 ft |
| Location | 1.5 Mi Sw&w of Ogemaw Col |
| NBI structure number | 000000000002892 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | June 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 3: scour critical: foundations unstable for the assessed or calculated scour |
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-18 over Farm Drain | 1937 | 5,052 | Fair |
| M-30 over Tobacco River | 2021 | 4,100 | Good |
| M-30 over Larabee Creek | 1977 | 3,517 | Good |
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.