Rivermatics

USGS Streamgage 11173500

Calaveras C near Sunol, CA

Calaveras C near Sunol, CA is USGS streamgage 11173500 in California, monitoring river discharge in hydrologic subbasin 18050004. It drains a watershed of about 99 square miles. Discharge records at this site go back to 1898. Typical flow runs near 0.8 cfs in July and 7.8 cfs in April, with the higher of the two arriving in April.

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Gauge details

State
California
Drainage area
99 sq mi
Gauge elevation
459 ft
Subbasin (HUC-8)
18050004
Coordinates
37.50194, -121.81833
USGS site number
11173500
Records begin
1898-04-01 (128 years)

Typical flow by month

Long-term daily discharge percentiles from the USGS record (up to 102 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 0 4 86.2
February 0 1 49.9
March 0 2 252.5
April 0 7.8 191.6
May 0.1 6.4 96.7
June 0 0.8 71.5
July 0 0.8 62.5
August 0 0.7 59.9
September 0 0.5 62.1
October 0 0.6 59.7
November 0 0.7 39.4
December 0 0.8 38

All values in cubic feet per second (cfs).

Common questions

When does Calaveras C near Sunol, CA normally run highest?
April, on the long-term record. The median daily flow that month is about 7.8 cfs, against 0.5 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 Calaveras C near Sunol, CA?
It depends on the month. In January, half of days historically fall near 4 cfs, with the middle 80% of days between 0 and 86.2 cfs. The month-by-month table on this page gives the full range.
How long has Calaveras C near Sunol, CA been measured?
Discharge records at USGS site 11173500 begin in 1898, about 128 years, covering roughly 8,837 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
Where is Calaveras C near Sunol, CA?
The gauge sits at 37.50194, -121.81833, in California, in hydrologic subbasin 18050004, at an elevation of about 459 feet, draining roughly 99 square miles.
Can I use Calaveras C near Sunol, 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