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USGS Surface-Water Monthly Statistics for the Nation

The statistics generated from this site are based on approved daily-mean data and may not match those published by the USGS in official publications. The user is responsible for assessment and use of statistics from this site. For more details on why the statistics may not match, click here.


Trinity County, California
Hydrologic Unit Code 18010211
Latitude  40°56'45", Longitude 123°22'55" NAD27
Drainage area 173  square miles
Gage datum 1,349.34 feet above NGVD29
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00060, Discharge, cubic feet per second,
YEAR Monthly mean in ft3/s   (Calculation Period: 1959-06-01 -> 1969-08-31)

Calculation period restricted by USGS staff due to special conditions at/near site
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1959 157.753.528.634.239.435.748.5
1960 129.8864.4875.1577.1640.2345.581.037.326.029.2246.7488.8
1961 195.71,2641,207856.7541.0281.485.143.531.430.4127.7450.0
1962 263.8793.1696.4898.4364.9166.458.351.832.3478.1396.8897.9
1963 221.81,084489.31,584948.3222.689.646.231.285.6743.3353.8
1964 1,016927.4505.3479.8328.5191.273.439.028.026.2189.94,237
1965 2,303860.8378.6614.8316.8162.
1966 818.5460.5870.0996.3437.2154.364.735.331.630.4172.1721.4
1967 711.4709.0577.9484.4803.5360.6100.746.835.651.363.0218.2
1968 653.21,445537.0321.2183.092.646.037.331.448.1216.7615.2
1969 1,505816.0772.01,104903.1276.278.631.0
Mean of
782 922 691 792 547 219 73 41 31 85 233 823

** No Incomplete data have been used for statistical calculation