USGS Streamgage 10131000
Chalk Creek at Coalville, UT
Chalk Creek at Coalville, UT is USGS streamgage 10131000 in Utah, monitoring river discharge in hydrologic subbasin 16020101. It drains a watershed of about 250 square miles. Discharge records at this site go back to 1905. Typical flow runs near 30.5 cfs in July and 84.6 cfs in April, with the higher of the two arriving in April.
Gauge details
- State
- Utah
- Drainage area
- 250 sq mi
- Gauge elevation
- 5,561 ft
- Subbasin (HUC-8)
- 16020101
- Coordinates
- 40.9205, -111.40159
- USGS site number
- 10131000
- Records begin
- 1905-05-20 (121 years)
Typical flow by month
Long-term daily discharge percentiles from the USGS record (up to 99 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 | 11.6 | 18.3 | 31.7 | |
| February | 13.3 | 19.8 | 37 | |
| March | 17.5 | 30 | 76.8 | |
| April | 35.1 | 84.6 | 230.2 | |
| May | 66.5 | 224.3 | 543.1 | |
| June | 28.7 | 130.4 | 360.4 | |
| July | 5.6 | 30.5 | 105.9 | |
| August | 4.6 | 17.2 | 44.7 | |
| September | 5.4 | 16 | 42.2 | |
| October | 7.8 | 19.7 | 37.8 | |
| November | 12.8 | 21 | 37.3 | |
| December | 10.9 | 18.4 | 31.8 |
All values in cubic feet per second (cfs).
Common questions
- When does Chalk Creek at Coalville, UT normally run highest?
- May, on the long-term record. The median daily flow that month is about 224.3 cfs, against 16 cfs in September, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
- What is a normal flow for Chalk Creek at Coalville, UT?
- It depends on the month. In January, half of days historically fall near 18.3 cfs, with the middle 80% of days between 11.6 and 31.7 cfs. The month-by-month table on this page gives the full range.
- How long has Chalk Creek at Coalville, UT been measured?
- Discharge records at USGS site 10131000 begin in 1905, about 121 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 Chalk Creek at Coalville, UT?
- The gauge sits at 40.9205, -111.40159, in Utah, in hydrologic subbasin 16020101, at an elevation of about 5,561 feet, draining roughly 250 square miles.
- Can I use Chalk Creek at Coalville, UT 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.