Webb Rd over I-75 SB
Cheboygan County, Michigan · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Webb Rd over I-75 SB in Cheboygan County, Michigan, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 7 (good condition) on the 0-9 scale.
- It was built in 1962 and reconstructed in 2024, making it 63 years old at the 2025 inventory.
- It carries about 2,270 vehicles a day (traffic count year 2020).
- Its listed owner is the state highway agency.
- It is one of 18 of the 73 inventoried bridges in Cheboygan County rated good (24.7%); 10 (13.7%) 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 good (deck 4 to 9, superstructure 5 to 9, substructure 4 to 7).
- Its most recent inspection on record is dated August 2024, on a 20-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 → (45.27318, -84.59254)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 4 | 9 | Excellent condition |
| Superstructure | 5 | 9 | Excellent condition |
| Substructure | 4 | 7 | Good condition |
Bridge details
| Structure | Prestressed concrete stringer or multi-beam girder |
| Length | about 170 ft |
| Location | 5.8 Mi N of Otsego Col |
| NBI structure number | 000000000001525 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | August 2024 |
| Inspection interval (item 91) | 20 months |
| Scour (item 113) | N: not over a waterway |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Michigan department of transportation.
Busiest bridges in Cheboygan County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Lincoln Avenue over Cheboygan River | 2007 | 12,000 | Fair |
| M-68|s Straits Hwy over Sturgeon River | 1927 | 10,873 | Fair |
| I-75 SB over Trowbridge Rd | 1962 | 7,875 | Fair |
| I-75 NB over Trowbridge Rd | 1962 | 7,875 | Fair |
| I-75 SB over M-27|s Straits Hwy | 1962 | 7,777 | Fair |
| I-75 NB over M-27|s Straits Hwy | 1962 | 7,777 | Fair |
All bridges nearby: Cheboygan County, MI bridge conditions · every bridge in Cheboygan County · Michigan bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.