SD027 over Crow Ck
Marshall County, South Dakota · rated Good in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- SD027 over Crow Ck in Marshall County, South Dakota, is rated in good condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 7 (good condition) on the 0-9 scale.
- It was built in 1977, making it 48 years old at the 2025 inventory.
- It carries about 590 vehicles a day (traffic count year 2024).
- Its listed owner is the state highway agency.
- It is one of 7 of the 38 inventoried bridges in Marshall County rated good (18.4%); 13 (34.2%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- It was rated fair in the 2024 inventory and is now good (deck 6 to 7, superstructure 6 to 7, substructure 6 to 7).
- Its most recent inspection on record is dated June 2024, 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 → (45.7588, -97.75089)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 6 | 7 | Good condition |
| Superstructure | 6 | 7 | Good condition |
| Substructure | 6 | 7 | Good condition |
Bridge details
| Structure | Continuous concrete slab |
| Length | about 86 ft |
| Location | 2.3 S Jct Sd 10 |
| NBI structure number | 000000046110123 |
| Condition class | Good |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | June 2024 |
| 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 South Dakota department of transportation.
Busiest bridges in Marshall County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| SD010 over Crow Ck | 1942 | 1,344 | Fair |
| SD010 over Drainage Ditch | 1948 | 945 | Fair |
| Irr SD010 over Clear Lake Inlet | 1993 | 692 | Good |
| SD027 over Trib Spain Ditch | 1959 | 613 | Fair |
| SD027 over Dry Run Ck | 1980 | 601 | Fair |
| SD027 over Ck | 1980 | 601 | Fair |
All bridges nearby: Marshall County, SD bridge conditions · every bridge in Marshall County · South Dakota bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.