USGS Streamgage 06307830
Tongue River below Brandenberg bridge near Ashland, MT
Tongue River below Brandenberg bridge near Ashland, MT is USGS streamgage 06307830 in Montana, monitoring river discharge in hydrologic subbasin 10090102. It drains a watershed of about 3,882 square miles. Discharge records at this site go back to 1973. Typical flow runs near 462.7 cfs in July and 247.3 cfs in April, with the higher of the two arriving in July.
Gauge details
- State
- Montana
- Drainage area
- 3,882 sq mi
- Gauge elevation
- 2,749 ft
- Subbasin (HUC-8)
- 10090102
- Coordinates
- 45.84039, -106.22343
- USGS site number
- 06307830
- Records begin
- 1973-10-01 (53 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 53 years of data), averaged within each month. These describe the historical normal range — they are not a forecast and not today's reading.
| Month | Low p10 | Typical p50 | High p90 | Range |
|---|---|---|---|---|
| January | 94.7 | 157.9 | 296.8 | |
| February | 96.2 | 165.8 | 329.9 | |
| March | 101.4 | 203.1 | 548.5 | |
| April | 105.9 | 247.3 | 637.5 | |
| May | 159.1 | 561.3 | 1,740.2 | |
| June | 206.9 | 1,246.5 | 3,066.7 | |
| July | 222.9 | 462.7 | 1,176.1 | |
| August | 171.8 | 359.4 | 520.9 | |
| September | 117.8 | 300.3 | 441.7 | |
| October | 108.2 | 240.9 | 428.9 | |
| November | 100.5 | 199.7 | 371.1 | |
| December | 95.7 | 168 | 290.8 |
All values in cubic feet per second (cfs).