Rivermatics

USGS Streamgage 11421770

Bear River below Drum Afterbay near Blue Canyon, CA

Bear River below Drum Afterbay near Blue Canyon, CA is USGS streamgage 11421770 in California, monitoring river discharge in hydrologic subbasin 18020126. It drains a watershed of about 12 square miles. Discharge records at this site go back to 1966. Typical flow runs near 11 cfs in July and 10.9 cfs in April, with the higher of the two arriving in July.

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Gauge details

State
California
Drainage area
12 sq mi
Subbasin (HUC-8)
18020126
Coordinates
39.25434, -120.77494
USGS site number
11421770
Records begin
1966-04-02 (60 years)

Typical flow by month

Long-term daily discharge percentiles from the USGS record (up to 60 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 5.2 6.2 11
February 5.2 6.5 22.9
March 6 10.9 40.3
April 5.9 10.9 49.3
May 5.8 11 17.4
June 6 11 12.7
July 6 11 12.6
August 6.2 11 13
September 6.1 11 13
October 5.2 6.3 9.6
November 5.1 6.2 9.1
December 5.1 6.2 8.9

All values in cubic feet per second (cfs).

Common questions

When does Bear River below Drum Afterbay near Blue Canyon, CA normally run highest?
May, on the long-term record. The median daily flow that month is about 11 cfs, against 6.2 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 Bear River below Drum Afterbay near Blue Canyon, CA?
It depends on the month. In January, half of days historically fall near 6.2 cfs, with the middle 80% of days between 5.2 and 11 cfs. The month-by-month table on this page gives the full range.
How long has Bear River below Drum Afterbay near Blue Canyon, CA been measured?
Discharge records at USGS site 11421770 begin in 1966, about 60 years, covering roughly 6,789 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
Where is Bear River below Drum Afterbay near Blue Canyon, CA?
The gauge sits at 39.25434, -120.77494, in California, in hydrologic subbasin 18020126, draining roughly 12 square miles.
Can I use Bear River below Drum Afterbay near Blue Canyon, 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