Merrick St over S Branch Raisin River
Lenawee County, Michigan · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Merrick St over S Branch Raisin River in Lenawee 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 1926 and reconstructed in 2001, making it 99 years old at the 2025 inventory.
- It carries about 1,380 vehicles a day (traffic count year 2003).
- Its listed owner is a city or municipal highway agency.
- It is one of 105 of the 225 inventoried bridges in Lenawee County rated fair (46.7%); 26 (11.6%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated March 2023, on a 24-month routine inspection cycle.
- 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 → (41.89458, -84.04712)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 8 | 8 | Very good condition |
| Superstructure | 6 | 6 | Satisfactory condition |
| Substructure | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Concrete through arch |
| Length | about 91 ft |
| Location | In Adrian |
| NBI structure number | 000000000005719 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | March 2023 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | U: unknown foundation, not evaluated for scour |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Michigan department of transportation.
Busiest bridges in Lenawee County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| M-52 over Beaver Creek | 1919 | 18,099 | Fair |
| M-52 over S Br Raisin River | 1948 | 17,411 | Fair |
| US-223 over Norfolk Southern RR | 1941 | 16,443 | Poor |
| US-223 over Raisin River | 1940 | 13,979 | Fair |
| Bentoak Ave over S Branch Raisin River | 1952 | 13,600 | Fair |
| US-223 over Mdot RR Cor & M-34 | 2006 | 13,595 | Fair |
All bridges nearby: Lenawee County, MI bridge conditions · every bridge in Lenawee County · Michigan bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.