Rivermatics

USGS Streamgage 11408000

Milton-Bowman Tunnel Outlet near Graniteville, CA

Milton-Bowman Tunnel Outlet near Graniteville, CA is USGS streamgage 11408000 in California, monitoring river discharge in hydrologic subbasin 18020125. Discharge records at this site go back to 1928. Typical flow runs near 37.5 cfs in July and 76.2 cfs in April, with the higher of the two arriving in April.

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Gauge details

State
California
Subbasin (HUC-8)
18020125
Coordinates
39.46018, -120.61132
USGS site number
11408000
Records begin
1928-06-01 (98 years)

Typical flow by month

Long-term daily discharge percentiles from the USGS record (up to 98 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 6 16.5 85.1
February 7.6 20.8 112.9
March 11.7 34.2 160
April 18.5 76.2 270.4
May 19.3 118.6 364.2
June 13.1 97.7 253.6
July 6.1 37.5 143.3
August 2.9 10.9 169.3
September 1.9 44.3 246.2
October 2.3 32.1 266.3
November 3.9 12.8 239.3
December 5.1 11.4 117.3

All values in cubic feet per second (cfs).

Common questions

When does Milton-Bowman Tunnel Outlet near Graniteville, CA normally run highest?
May, on the long-term record. The median daily flow that month is about 118.6 cfs, against 10.9 cfs in August, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
What is a normal flow for Milton-Bowman Tunnel Outlet near Graniteville, CA?
It depends on the month. In January, half of days historically fall near 16.5 cfs, with the middle 80% of days between 6 and 85.1 cfs. The month-by-month table on this page gives the full range.
How long has Milton-Bowman Tunnel Outlet near Graniteville, CA been measured?
Discharge records at USGS site 11408000 begin in 1928, about 98 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 Milton-Bowman Tunnel Outlet near Graniteville, CA?
The gauge sits at 39.46018, -120.61132, in California, in hydrologic subbasin 18020125.
Can I use Milton-Bowman Tunnel Outlet near Graniteville, 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