Rivermatics

USGS Streamgage 11400500

Butt C below Almanor-Butt C Tu near Prattville, CA

Butt C below Almanor-Butt C Tu near Prattville, CA is USGS streamgage 11400500 in California, monitoring river discharge in hydrologic subbasin 18020121. It drains a watershed of about 69 square miles. Discharge records at this site go back to 1936. Typical flow runs near 64.2 cfs in July and 162.4 cfs in April, with the higher of the two arriving in April.

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Gauge details

State
California
Drainage area
69 sq mi
Subbasin (HUC-8)
18020121
Coordinates
40.18711, -121.18802
USGS site number
11400500
Records begin
1936-10-01 (90 years)

Typical flow by month

Long-term daily discharge percentiles from the USGS record (up to 89 years of data), averaged within each month. These describe the historical normal range — they are not a forecast and not today's reading.

Historical monthly discharge percentiles in cubic feet per second
Month Low p10 Typical p50 High p90 Range
January 47 75.3 945.5
February 52.3 91.1 954.4
March 65.6 130.2 985.6
April 79.5 162.4 1,056.9
May 58.3 171.3 1,045.6
June 43 93.5 1,018.8
July 36.5 64.2 988.7
August 33.8 54.5 977
September 34 53.4 969.4
October 36.5 54.6 973.9
November 40.6 60.2 957
December 42.9 68.4 954.3

All values in cubic feet per second (cfs).

Common questions

When does Butt C below Almanor-Butt C Tu near Prattville, CA normally run highest?
May, on the long-term record. The median daily flow that month is about 171.3 cfs, against 53.4 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 Butt C below Almanor-Butt C Tu near Prattville, CA?
It depends on the month. In January, half of days historically fall near 75.3 cfs, with the middle 80% of days between 47 and 945.5 cfs. The month-by-month table on this page gives the full range.
How long has Butt C below Almanor-Butt C Tu near Prattville, CA been measured?
Discharge records at USGS site 11400500 begin in 1936, about 90 years, covering roughly 8,821 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
Where is Butt C below Almanor-Butt C Tu near Prattville, CA?
The gauge sits at 40.18711, -121.18802, in California, in hydrologic subbasin 18020121, draining roughly 69 square miles.
Can I use Butt C below Almanor-Butt C Tu near Prattville, CA 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 gauges in this subbasin