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<br />.. <br /> <br />. <br /> <br />sC3rce. Probable events have been identified by the Army Corps of <br />Engineers. by other independent studies, and this report by <br />comparisons to floods on adjacent creeks.174 Those dates include: <br /> <br />1894 - May 31 - June 2 <br />1921 - June 2 -6 <br />1938 - September 2 <br />1951 - August 3 <br />1969 - May 7 <br />1973 - May 5 <br /> <br />A peak discharge of 5,700 cfs was estimated for Dry Creek No. 2 on <br />August 3, 1951. A severe storm with unofficial estimates of six inches <br />of rain fell near Niwot. It damaged crops, buildings, equipment. <br />bridges and railroad track. That flood was reportedly one-quarter of a <br />mile wide and caused the evacuation of fifty people.175 <br /> <br />BOULDER CREEK BASIN <br /> <br />Boulder Creek, along with its major tributaries--Horth and ,'v1iddle <br />Boulder Creeks and Fournile Creek--drains a vast section of the <br />mountainous territory of the County. Many settlements are contained in <br />the basin. Boulder Creek also flows through Boulder, the lar<.J"st City <br />in the County, before it reaches the plains and joins the St. Vrilin. <br /> <br />. <br /> <br />Boulder <br /> <br />Located on the banks of Boulder Creek near the Mouth of Boulder <br />Canyon, [loulder has had a number of destructive floods since its <br />incorporation in 1871.176 Floods have been recorded by personal <br />observation and by stream gauges since the 1880's. One gauge, located <br />at a site about two and one-half miles downstream from Orodell [about <br />three miles upstream from downtown Boulder) in Boulder Canyon, <br />operated intermittently from 1887. Another gauge at Orodell has been <br />operating periodically from 1906 to 1914 and constantly from 1916 to the <br />p resen t. 1 77 <br /> <br />Major floods rn Boulder have occurred in: <br /> <br /> 1844 1929 - July 23 <br /> 1864 - June 1933 - July 8, September 8 <br /> 1876 - May 21 - 23 1935 - May 28, June 15 <br /> 1890 - August 4 1938 - September 23 <br /> 1892 1939 <br /> 1894 - May 31 - June 2 1941 - June 22 <br /> 1895 - July 31 1942 - April 25 <br /> 1896 - August 19 1947 - June 21 - 23 <br /> 1897 - June 10, July G-7 1949 - June 4 <br />. 1904 - May 12 1951 - August 3, August 31 <br />1906 - July 8 1952 - June 7 <br /> 1909 - July 5, July 23, August 18 1954 - July 15 <br />