Csah 4 over Stanchfield Brook
Isanti County, Minnesota · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- Csah 4 over Stanchfield Brook in Isanti County, Minnesota, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 5 (fair condition) on the 0-9 scale.
- It was built in 1959, making it 66 years old at the 2025 inventory.
- It carries about 530 vehicles a day (traffic count year 2016).
- Its listed owner is the county highway agency.
- It is one of 15 of the 37 inventoried bridges in Isanti County rated fair (40.5%); 2 (5.4%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its class is unchanged from 2024 (fair), but component ratings moved: deck 6 to 5.
- 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 → (45.71655, -93.29743)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 6 | 5 | Fair condition |
| Superstructure | 6 | 6 | Satisfactory condition |
| Substructure | 5 | 5 | Fair condition |
Bridge details
| Structure | Timber stringer or multi-beam girder |
| Length | about 53 ft |
| Location | at Jct Csah 14 |
| NBI structure number | 7237 |
| 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) | 8: foundations stable, scour above the top of the footing |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Minnesota department of transportation.
Busiest bridges in Isanti County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| Mn 95 over Rum River | 2014 | 11,700 | Good |
| Csah 5 over Rum River | 1978 | 8,522 | Fair |
| Msas 113 over BNSF RR | 1995 | 7,832 | Good |
| Mn 95 over Rum River | 2009 | 6,629 | Good |
| Mn 65 over 16TH Ave SE | 1992 | 6,400 | Good |
| Mn 65 over 16TH Ave SE | 1992 | 5,850 | Fair |
All bridges nearby: Isanti County, MN bridge conditions · every bridge in Isanti County · Minnesota bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.