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 sits on the Sun River, alongside 3 other gauges Rivermatics tracks on the same river. 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. Rivermatics issues a daily machine-learned flow outlook for this gauge, reaching 14 days ahead.
View live conditions & forecast →
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)
- Rivermatics forecast
- 14-day flow outlook
14-day flow forecast
Based on observations through for Sun River below Diversion Dam near Augusta, MT. Each day carries a median estimate and the band the model expects the flow to fall within — not a single number to plan against. Forecasts are re-issued daily; see the live screen for the current outlook.
| Date | Low p10 | Expected p50 | High p90 | Range |
|---|---|---|---|---|
| 167 | 186 | 205 | ||
| 158 | 191 | 233 | ||
| 154 | 191 | 244 | ||
| 150 | 191 | 256 | ||
| 144 | 189 | 254 | ||
| 136 | 190 | 266 | ||
| 138 | 197 | 292 | ||
| 134 | 196 | 295 | ||
| 121 | 187 | 276 | ||
| 114 | 182 | 267 | ||
| 99.1 | 172 | 256 | ||
| 96.4 | 169 | 251 | ||
| 87.9 | 162 | 244 | ||
| 90 | 158 | 236 |
All values in cubic feet per second (cfs). Estimates only — do not use them for navigation or for any safety, rescue, or emergency decision.
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).
Common questions
- When does Sun River below Diversion Dam near Augusta, MT normally run highest?
- June, on the long-term record. The median daily flow that month is about 1,177.5 cfs, against 127.2 cfs in November, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
- What is a normal flow for Sun River below Diversion Dam near Augusta, MT?
- It depends on the month. In January, half of days historically fall near 141 cfs, with the middle 80% of days between 74 and 233.3 cfs. The month-by-month table on this page gives the full range.
- How long has Sun River below Diversion Dam near Augusta, MT been measured?
- Discharge records at USGS site 06080900 begin in 1964, about 62 years, covering roughly 3,630 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
- Is there a flow forecast for Sun River below Diversion Dam near Augusta, MT?
- Yes. Rivermatics trains a machine-learned model — a temporal-fusion transformer — on this basin's observed flows, weather, and snowpack, and issues a daily flow outlook reaching 14 days ahead: a median estimate inside a confidence band, not a single number to bet on. Every forecast is scored against days the model never trained on, and that track record is published on the live gauge screen. Open live conditions to see the current outlook.
- Where is Sun River below Diversion Dam near Augusta, MT?
- The gauge sits at 47.61851, -112.69206, in Montana, in hydrologic subbasin 10030104, at an elevation of about 4,377 feet, draining roughly 610 square miles.
- Can I use Sun River below Diversion Dam near Augusta, MT data for flood or safety decisions?
- No. Rivermatics provides estimates, not guarantees, and the readings and forecasts here may be delayed, inaccurate, or wrong. Do not use them for navigation or for any safety, rescue, or emergency decision. Check the National Weather Service and USGS directly, and use your own judgment.
Upstream and downstream on the Sun River
Every gauge Rivermatics tracks on this river, ordered by drainage area — upstream first. See the Sun River in full.
- Sun River below Diversion Dam near Augusta, MT this page
- Sun River below Willow Creek near Augusta, MT 814 sq mi
- Sun River at Simms, MT 1,296 sq mi
- Sun River near Vaughn, MT 1,774 sq mi