T 230 over S Fk Root River
Houston County, Minnesota · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- T 230 over S Fk Root River in Houston County, Minnesota, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the substructure, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1977, making it 48 years old at the 2025 inventory.
- It carries about 56 vehicles a day (traffic count year 1986).
- Its listed owner is a town or township highway agency.
- It is one of 58 of the 170 inventoried bridges in Houston County rated fair (34.1%); 5 (2.9%) 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 October 2024, 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 → (43.71518, -91.6257)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 7 | 7 | Good condition |
| Superstructure | 7 | 7 | Good condition |
| Substructure | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Prestressed concrete tee beam |
| Length | about 122 ft |
| Location | 0.4 Mi S of Jct Csah 4 |
| NBI structure number | 28507 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | October 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 Minnesota department of transportation.
Busiest bridges in Houston County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| US 61 over Ditch | 1926 | 16,334 | Fair |
| US 61 over Im Rail and Street | 2007 | 15,200 | Good |
| Mn 16 over Pine Creek | 1990 | 10,031 | Fair |
| Mn 16 over Pine Creek | 1931 | 10,031 | Fair |
| US 61 over Mississippi River | 1993 | 9,000 | Good |
| US 61 over Mississippi River | 1992 | 7,600 | Fair |
All bridges nearby: Houston County, MN bridge conditions · every bridge in Houston County · Minnesota bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.