Rivermatics

USGS Streamgage 11278000

Eleanor C near Hetch Hetchy, CA

Eleanor C near Hetch Hetchy, CA is USGS streamgage 11278000 in California, monitoring river discharge in hydrologic subbasin 18040009. It drains a watershed of about 78 square miles. Discharge records at this site go back to 1909. Typical flow runs near 22.1 cfs in July and 11 cfs in April, with the higher of the two arriving in July.

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Gauge details

State
California
Drainage area
78 sq mi
Gauge elevation
4,515 ft
Subbasin (HUC-8)
18040009
Coordinates
37.96907, -119.88209
USGS site number
11278000
Records begin
1909-10-01 (117 years)

Typical flow by month

Long-term daily discharge percentiles from the USGS record (up to 66 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 4.7 6.6 164.8
February 5 6.7 209.9
March 5.2 8.1 171.9
April 5 11 627.6
May 5.1 139.3 1,082.9
June 5.7 128.9 1,010.9
July 15.1 22.1 382.1
August 13.6 20 28
September 9.6 16.5 23
October 3.1 7.4 35.5
November 4.3 6.1 80.6
December 4.6 6.4 73.8

All values in cubic feet per second (cfs).

Common questions

When does Eleanor C near Hetch Hetchy, CA normally run highest?
May, on the long-term record. The median daily flow that month is about 139.3 cfs, against 6.1 cfs in November, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
What is a normal flow for Eleanor C near Hetch Hetchy, CA?
It depends on the month. In January, half of days historically fall near 6.6 cfs, with the middle 80% of days between 4.7 and 164.8 cfs. The month-by-month table on this page gives the full range.
How long has Eleanor C near Hetch Hetchy, CA been measured?
Discharge records at USGS site 11278000 begin in 1909, about 117 years, covering roughly 9,121 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
Where is Eleanor C near Hetch Hetchy, CA?
The gauge sits at 37.96907, -119.88209, in California, in hydrologic subbasin 18040009, at an elevation of about 4,515 feet, draining roughly 78 square miles.
Can I use Eleanor C near Hetch Hetchy, 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