Rivermatics

USGS Streamgage 11428800

Rubicon River below Hell Hole Dam, CA

Rubicon River below Hell Hole Dam, CA is USGS streamgage 11428800 in California, monitoring river discharge in hydrologic subbasin 18020128. It drains a watershed of about 114 square miles. Discharge records at this site go back to 1965. Typical flow runs near 22.3 cfs in July and 17.6 cfs in April, with the higher of the two arriving in July.

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Gauge details

State
California
Drainage area
114 sq mi
Subbasin (HUC-8)
18020128
Coordinates
39.05657, -120.40798
USGS site number
11428800
Records begin
1965-11-06 (61 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 11.3 13.8 31.1
February 11.1 15 29.8
March 11.7 16.5 31.2
April 12 17.6 35.1
May 16.5 21.2 76.5
June 15 22.6 386.6
July 15.5 22.3 29.5
August 8.8 22 24.5
September 8 22 33.4
October 8.4 22.7 73.3
November 12 22 41.8
December 11.1 17.2 28.4

All values in cubic feet per second (cfs).

Common questions

When does Rubicon River below Hell Hole Dam, CA normally run highest?
October, on the long-term record. The median daily flow that month is about 22.7 cfs, against 13.8 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 Rubicon River below Hell Hole Dam, CA?
It depends on the month. In January, half of days historically fall near 13.8 cfs, with the middle 80% of days between 11.3 and 31.1 cfs. The month-by-month table on this page gives the full range.
How long has Rubicon River below Hell Hole Dam, CA been measured?
Discharge records at USGS site 11428800 begin in 1965, about 61 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 Rubicon River below Hell Hole Dam, CA?
The gauge sits at 39.05657, -120.40798, in California, in hydrologic subbasin 18020128, draining roughly 114 square miles.
Can I use Rubicon River below Hell Hole Dam, 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