USGS Streamgage 06349000
Heart River near Mandan, ND
Heart River near Mandan, ND is USGS streamgage 06349000 in North Dakota, monitoring river discharge in hydrologic subbasin 10130203. It drains a watershed of about 3,320 square miles. Discharge records at this site go back to 1924. Typical flow runs near 97.2 cfs in July and 256.2 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- North Dakota
- Drainage area
- 3,320 sq mi
- Gauge elevation
- 1,662 ft
- Subbasin (HUC-8)
- 10130203
- Coordinates
- 46.83389, -100.97417
- USGS site number
- 06349000
- Records begin
- 1924-04-01 (102 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 102 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 | 1.1 | 12.7 | 60.8 | |
| February | 0.1 | 15.2 | 178.3 | |
| March | 19.1 | 178.4 | 2,515.8 | |
| April | 41.7 | 256.2 | 2,516.7 | |
| May | 28.2 | 122.7 | 852.9 | |
| June | 35 | 135.2 | 837.6 | |
| July | 25.8 | 97.2 | 427.6 | |
| August | 16.2 | 69.2 | 186.6 | |
| September | 13.4 | 55.4 | 138 | |
| October | 13.3 | 40.8 | 127.4 | |
| November | 13.5 | 32.9 | 93.3 | |
| December | 6.2 | 22 | 72.9 |
All values in cubic feet per second (cfs).
Common questions
- When does Heart River near Mandan, ND normally run highest?
- April, on the long-term record. The median daily flow that month is about 256.2 cfs, against 12.7 cfs in January, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
- What is a normal flow for Heart River near Mandan, ND?
- It depends on the month. In January, half of days historically fall near 12.7 cfs, with the middle 80% of days between 1.1 and 60.8 cfs. The month-by-month table on this page gives the full range.
- How long has Heart River near Mandan, ND been measured?
- Discharge records at USGS site 06349000 begin in 1924, about 102 years, covering roughly 9,126 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
- Where is Heart River near Mandan, ND?
- The gauge sits at 46.83389, -100.97417, in North Dakota, in hydrologic subbasin 10130203, at an elevation of about 1,662 feet, draining roughly 3,320 square miles.
- Can I use Heart River near Mandan, ND 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.