USGS Streamgage 12330000
Boulder Creek at Maxville, MT
Boulder Creek at Maxville, MT is USGS streamgage 12330000 in Montana, monitoring river discharge in hydrologic subbasin 17010202. It drains a watershed of about 71 square miles. Discharge records at this site go back to 1939. Typical flow runs near 48.3 cfs in July and 25 cfs in April, with the higher of the two arriving in July.
Gauge details
- State
- Montana
- Drainage area
- 71 sq mi
- Gauge elevation
- 4,772 ft
- Subbasin (HUC-8)
- 17010202
- Coordinates
- 46.47165, -113.23577
- USGS site number
- 12330000
- Records begin
- 1939-05-01 (87 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 86 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 | 12.5 | 18.6 | 24.3 | |
| February | 13.5 | 18.3 | 23.1 | |
| March | 14.1 | 18.3 | 24 | |
| April | 15.9 | 25 | 46.5 | |
| May | 46.3 | 97.8 | 217.8 | |
| June | 64.5 | 156.3 | 311.3 | |
| July | 19.2 | 48.3 | 104.6 | |
| August | 8.8 | 17.3 | 36.4 | |
| September | 7.4 | 15.8 | 33 | |
| October | 11.6 | 22.9 | 34.8 | |
| November | 15.9 | 23 | 32.1 | |
| December | 13.8 | 20.3 | 27.5 |
All values in cubic feet per second (cfs).