USGS Streamgage 06178000
Poplar River at international boundary
Poplar River at international boundary is USGS streamgage 06178000 in Montana, monitoring river discharge in hydrologic subbasin 10060003. It drains a watershed of about 358 square miles. Discharge records at this site go back to 1931. Typical flow runs near 1.5 cfs in July and 15.4 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- Montana
- Drainage area
- 358 sq mi
- Gauge elevation
- 2,467 ft
- Subbasin (HUC-8)
- 10060003
- Coordinates
- 48.99029, -105.69691
- USGS site number
- 06178000
- Records begin
- 1931-03-01 (95 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 95 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 | — | 0 | — | |
| February | — | 0.6 | — | |
| March | 0.1 | 9.8 | 186.4 | |
| April | 6.5 | 15.4 | 161.8 | |
| May | 4.2 | 10.1 | 43.3 | |
| June | 1 | 5.6 | 35.1 | |
| July | 0.1 | 1.5 | 13.1 | |
| August | 0 | 0.2 | 3.7 | |
| September | 0.1 | 0.4 | 4 | |
| October | 0.3 | 2.6 | 6.3 | |
| November | 0.5 | 4.9 | 9.6 | |
| December | — | 0 | — |
All values in cubic feet per second (cfs).