Rivermatics

USGS Streamgage 11299600

Black C near Copperopolis, CA

Black C near Copperopolis, CA is USGS streamgage 11299600 in California, monitoring river discharge in hydrologic subbasin 18040010. It drains a watershed of about 14 square miles. Discharge records at this site go back to 1983. Typical flow runs near 0 cfs in July and 3.3 cfs in April, with the higher of the two arriving in April.

View live conditions →

Gauge details

State
California
Drainage area
14 sq mi
Gauge elevation
749 ft
Subbasin (HUC-8)
18040010
Coordinates
37.96104, -120.6152
USGS site number
11299600
Records begin
1983-08-24 (43 years)

Typical flow by month

Long-term daily discharge percentiles from the USGS record (up to 43 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 0.3 2.8 87.7
February 0.6 5.9 90.3
March 0.8 7.7 66.3
April 0.5 3.3 17.8
May 0.1 0.9 5.4
June 0 0.1 1.1
July 0 0 0.1
August 0 0 0
September 0 0 0
October 0 0 0.1
November 0 0 2.2
December 0.1 0.7 27.8

All values in cubic feet per second (cfs).

Common questions

When does Black C near Copperopolis, CA normally run highest?
March, on the long-term record. The median daily flow that month is about 7.7 cfs, against 0 cfs in July, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
What is a normal flow for Black C near Copperopolis, CA?
It depends on the month. In January, half of days historically fall near 2.8 cfs, with the middle 80% of days between 0.3 and 87.7 cfs. The month-by-month table on this page gives the full range.
How long has Black C near Copperopolis, CA been measured?
Discharge records at USGS site 11299600 begin in 1983, about 43 years, covering roughly 9,123 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
Where is Black C near Copperopolis, CA?
The gauge sits at 37.96104, -120.6152, in California, in hydrologic subbasin 18040010, at an elevation of about 749 feet, draining roughly 14 square miles.
Can I use Black C near Copperopolis, 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