US-23 over M-36
Livingston County, Michigan · rated Poor in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- US-23 over M-36 in Livingston County, Michigan, is rated in poor condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 4 (poor condition) on the 0-9 scale.
- It was built in 1960 and reconstructed in 2006, making it 65 years old at the 2025 inventory.
- It carries about 64,800 vehicles a day (traffic count year 2020).
- Its listed owner is the state highway agency.
- It is one of 23 of the 165 inventoried bridges in Livingston County rated poor (13.9%); 23 (13.9%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its class is unchanged from 2024 (poor), but component ratings moved: substructure 5 to 4.
- Its most recent inspection on record is dated July 2024, on a 12-month routine inspection cycle.
- A poor rating means at least one major component - deck, superstructure, or substructure - is rated 4 or lower on FHWA's 0-9 scale. It does not by itself mean the bridge is unsafe; bridges judged unsafe are closed or load-restricted by their owners.
View this bridge on a map → (42.44274, -83.75408)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 4 | 4 | Poor condition |
| Superstructure | 5 | 5 | Fair condition |
| Substructure | 5 | 4 | Poor condition |
Bridge details
| Structure | Steel stringer or multi-beam girder |
| Length | about 167 ft |
| Location | @ M-36 |
| NBI structure number | 000000000005732 |
| Condition class | Poor |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | July 2024 |
| Inspection interval (item 91) | 12 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 Livingston County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| I-96 WB Cd over US-23 SB | 2016 | 51,600 | Good |
| I-96 WB over US-23 SB | 2015 | 51,600 | Fair |
| I-96 EB over US-23 NB | 2015 | 51,600 | Fair |
| I-96 WB over US-23 NB | 2015 | 51,600 | Fair |
| I-96 EB Cd over US-23 SB | 2016 | 51,588 | Good |
| I-96 EB Cd over Old US-23 | 2016 | 51,588 | Good |
All bridges nearby: Livingston County, MI bridge conditions · every bridge in Livingston County · Michigan bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.