Rivermatics

USGS Streamgage 11465690

Colgan C near Santa Rosa, CA

Colgan C near Santa Rosa, CA is USGS streamgage 11465690 in California, monitoring river discharge in hydrologic subbasin 18010110. It drains a watershed of about 3 square miles. Discharge records at this site go back to 2006.

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Gauge details

State
California
Drainage area
3 sq mi
Gauge elevation
3 ft
Subbasin (HUC-8)
18010110
Coordinates
38.4021, -122.73301
USGS site number
11465690
Records begin
2006-10-01 (20 years)

Typical flow by month

Long-term daily discharge percentiles from the USGS record (up to 20 years of data), averaged within each month. These describe the historical normal range — they are not a forecast and not today's reading.

Only 8 of 12 months have enough record to summarize; the rest are omitted.

Historical monthly discharge percentiles in cubic feet per second
Month Low p10 Typical p50 High p90 Range
January 0 1.1 39
February 0.1 1.5 41.9
March 0.1 1.6 25.9
April 0.1 1.1 8.5
September — 0 —
October 0 0 8.6
November 0 0.1 12.4
December 0 1.1 31.6

All values in cubic feet per second (cfs).

Common questions

When does Colgan C near Santa Rosa, CA normally run highest?
March, on the long-term record. The median daily flow that month is about 1.6 cfs, against 0 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 Colgan C near Santa Rosa, CA?
It depends on the month. In January, half of days historically fall near 1.1 cfs, with the middle 80% of days between 0 and 39 cfs. The month-by-month table on this page gives the full range.
How long has Colgan C near Santa Rosa, CA been measured?
Discharge records at USGS site 11465690 begin in 2006, about 20 years, covering roughly 4,245 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
Where is Colgan C near Santa Rosa, CA?
The gauge sits at 38.4021, -122.73301, in California, in hydrologic subbasin 18010110, at an elevation of about 3 feet, draining roughly 3 square miles.
Can I use Colgan C near Santa Rosa, 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