15 USGS Streamgages · Mississippi River system
James River flows and levels
James River is gauged at 15 USGS streamgages in North Dakota and South Dakota, each tracked by Rivermatics. The mainstem runs about 762 miles (1,227 km) from headwaters to outlet. It drains into the Mississippi River system. Drainage area at the gauges ranges from 113 square miles at James River near Manfred, ND up to 20,962 at James River near Yankton, SD. The gauged reach falls about 460 feet, from 1,616 feet down to 1,156. Rivermatics issues a daily machine-learned 14-day flow outlook at 14 of them.
Gauges on this river, upstream to downstream
Ordered by drainage area, which is how far down the river each gauge sits. April and July figures are long-term median daily flows for that month from the USGS record — historical normals, not a forecast and not today's reading.
| Gauge | State | Drainage sq mi | Elevation ft | April p50 cfs | July p50 cfs | Forecast |
|---|---|---|---|---|---|---|
| James River near Manfred, ND | ND | 113 | 1,616 | 3.5 | 0.2 | — |
| James River near Grace City, ND | ND | 1,060 | 1,462 | 67.4 | 15.5 | 14-day |
| James River above Arrowwood Lake near Kensal, ND | ND | 1,200 | 1,445 | 89.8 | 28.1 | 14-day |
| James River at Jamestown, ND | ND | 2,800 | 1,385 | 76.1 | 52.5 | 14-day |
| James River at Lamoure, ND | ND | 3,970 | 1,305 | 156 | 144.3 | 14-day |
| James River at Nd-Sd State Line | ND | 5,160 | 1,288 | 423 | 406.4 | 14-day |
| James River at Columbia, SD | SD | 5,691 | 1,289 | 286.4 | 327 | 14-day |
| James River near Stratford, SD | SD | 8,780 | 1,283 | 273.7 | 238.4 | 14-day |
| James River at Ashton, SD | SD | 9,712 | 1,251 | 327.4 | 236.8 | 14-day |
| James River near Redfield, SD | SD | 13,886 | 1,245 | 446.5 | 227.9 | 14-day |
| James River at Huron, SD | SD | 15,846 | 1,231 | 585.7 | 272.4 | 14-day |
| James River near Forestburg, SD | SD | 17,613 | 1,224 | 656.7 | 348.1 | 14-day |
| James River near Mitchell, SD | SD | 19,088 | 1,208 | 880 | 863.8 | 14-day |
| James River near Scotland, SD | SD | 20,672 | 1,174 | 742 | 356.7 | 14-day |
| James River near Yankton, SD | SD | 20,962 | 1,156 | 1,272.3 | 1,164.1 | 14-day |
Typical flow by month at James River near Yankton, SD
The furthest-downstream gauge on this river, so the fullest flow it carries here. Long-term daily discharge percentiles from the USGS record (up to 45 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 | 27 | 142.4 | 889.5 | |
| February | 30.5 | 151.9 | 1,081.9 | |
| March | 97.9 | 696.1 | 8,505.2 | |
| April | 104.2 | 1,272.3 | 13,410 | |
| May | 177.1 | 1,404.8 | 11,071.3 | |
| June | 160.8 | 1,427.9 | 9,857 | |
| July | 64.5 | 1,164.1 | 8,659.4 | |
| August | 37.3 | 530.6 | 6,126.5 | |
| September | 20.6 | 459.4 | 3,034.7 | |
| October | 17.3 | 423.1 | 2,537.4 | |
| November | 28.3 | 300 | 2,570 | |
| December | 21 | 242.4 | 1,802.6 |
All values in cubic feet per second (cfs).
Common questions
- When does the James River run highest?
- June, on the long-term record at James River near Yankton, SD — the furthest-downstream gauge Rivermatics tracks on this river. Median daily flow there is about 1,427.9 cfs that month, against 142.4 cfs in January, the lowest. Upstream gauges peak on their own schedule; the table on this page gives April and July for each.
- How many gauges are on the James River?
- Rivermatics tracks 15 USGS streamgages on the James River, across North Dakota and South Dakota. Each has its own page with the site's full flow record and monthly normals. The river may carry other gauges that publish neither daily values nor discharge statistics; those are not tracked here.
- Is there a flow forecast for the James River?
- Yes, at 14 of the 15 gauges. Rivermatics trains a machine-learned model — a temporal-fusion transformer — on each basin's observed flows, weather and snowpack, and issues a daily 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 each gauge's live screen.
- What river system is the James River part of?
- The James River drains into the Mississippi River system — it is a tributary somewhere in that chain, following the flowpath down to its terminal river. Rivermatics builds this from the USGS/geoconnex reference-mainstem network rather than from names.
- Can I use James River 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.
Other rivers in the Mississippi River system
- Missouri River 52 gauges
- Big Sioux River 17 gauges
- Kansas River 12 gauges
- Smoky Hill River 12 gauges
- Platte River 11 gauges
- Rapid Creek 11 gauges
- Republican River 11 gauges
- Yellowstone River 10 gauges