S Laird Rd L137 over W Br Sturgeon R
Houghton County, Michigan · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- S Laird Rd L137 over W Br Sturgeon R in Houghton County, Michigan, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 8 (very good condition) on the 0-9 scale.
- It was built in 1983, making it 42 years old at the 2025 inventory.
- It carries about 48 vehicles a day (traffic count year 2016).
- Its listed owner is the county highway agency.
- It is one of 38 of the 59 inventoried bridges in Houghton County rated good (64.4%); 2 (3.4%) are rated poor.
- Its traffic status in the 2025 inventory is posted for load (NBI item 41).
- Its condition class and component ratings are unchanged from the 2024 inventory.
- Its most recent inspection on record is dated October 2023, on a 24-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 → (46.74291, -88.7608)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 8 | 8 | Very good condition |
| Superstructure | 8 | 8 | Very good condition |
| Substructure | 8 | 8 | Very good condition |
Bridge details
| Structure | Prestressed concrete multiple box beam |
| Length | about 68 ft |
| Location | 2 Mi S of Alston |
| NBI structure number | 000000000003410 |
| Condition class | Good |
| Traffic status (item 41) | Posted for load |
| Last inspection (item 90) | October 2023 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 5: foundations stable, scour within the limits of the footing or piles |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Michigan department of transportation.
Busiest bridges in Houghton County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Us-41&m-26 Rr(abn) over Portage Lake & EB M-26 | 1960 | 24,754 | Fair |
| US-41 over Pilgrim River | 1916 | 5,543 | Fair |
| M-26 over Quincy Creek | 2021 | 5,200 | Good |
| US-41 over Sturgeon River Slough | 1956 | 3,985 | Fair |
| US-41 over Snake River | 1934 | 3,883 | Fair |
| US-41 over Backwater Portage River | 1929 | 3,883 | Fair |
All bridges nearby: Houghton County, MI bridge conditions · every bridge in Houghton County · Michigan bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.