USGS Streamgage 06080900
Sun River below Diversion Dam near Augusta, MT
Sun River below Diversion Dam near Augusta, MT is USGS streamgage 06080900 in Montana, monitoring river discharge in hydrologic subbasin 10030104. It drains a watershed of about 610 square miles. Discharge records at this site go back to 1964. Typical flow runs near 161.7 cfs in July and 165.8 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- Montana
- Drainage area
- 610 sq mi
- Gauge elevation
- 4,377 ft
- Subbasin (HUC-8)
- 10030104
- Coordinates
- 47.61851, -112.69206
- USGS site number
- 06080900
- Records begin
- 1964-06-09 (62 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 59 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 | 74 | 141 | 233.3 | |
| February | 57 | 141 | 209.4 | |
| March | 56.5 | 146.9 | 264.4 | |
| April | 42.5 | 165.8 | 908.8 | |
| May | 193.7 | 904.3 | 3,456.1 | |
| June | 181.8 | 1,177.5 | 4,311 | |
| July | 78.2 | 161.7 | 844.6 | |
| August | 60.8 | 138.1 | 254.9 | |
| September | 62.5 | 133.9 | 232.4 | |
| October | 61.6 | 130.6 | 245.4 | |
| November | 64 | 127.2 | 253.2 | |
| December | 67.7 | 138.3 | 243.2 |
All values in cubic feet per second (cfs).