Flood plain information: Lake Earl - Lake Talawa and Lower Smith River, Del Norte County, California

~ ( J.) .I ,,, ·flf L O O O PL A I N I N F O R MAT IO N ) I ,_-/)f£i,... ... ­LAl{ E EARL-LAl<E TALAWA ANO LOWER SMITH RIVER DEL NORTE COUNTY CALIFORNIA PREPARED FOR DEL NORTE COUNTY 1 , BY U. S. ARMY ENGINEER DISTRICT , f , JLJL,-z , -, 15 .) -../ SAN FRANCISCO ~ ,. ; CORPS OF ENGINEERS "~" / JUNE 1971 ';, "'--.Lih,t,_t't'~ • • • • J CONTENTS INTRODUCTION SUMMARY OF FLOOD SITUATION GENERAL CONDITIONS AND PAST FLOODS Settlement . Flood damage prevention measures Flood warning and· forecasting services The lakes and their drainage area General C 1 imate Physiography and drainage . Development in the flood plain Roads Obstruction to floodflow Flood Situation General Flood records Flooded ar~as Flood Descriptions December 1955 • The 19 and 24 December 1964 storm . December 1964 flood . FUTURE FLOODS Determination of Intermediate Regional Flood Determination of Standard Project Flood . Frequency •. Possible larger floods Hazards of Great Floods . Areas flooded and heights of flooding • Velocity, rates of rise, and duration • Page 1 6 6 8 . 8 8 . . 8 9 9 11 11 11 14 14 14 16 17 17 18 19 20 20 20 21 23 23 23 23 :ONTENTS (Cont 1d) GLOSSARY AUTHOR i°TY, ACl<NOWLEDGEMENTS ~ AND i NTERPRETAT I ON OF DATA Table 2 3 Plate TABLES Floods - Sm!th River near Crescent City - Date, Order of Magnitude, Crest Height and Peak Discharge (1861 ~ 1966) Smith R:ver USGS Streamgaging Station near Crescent City - Annua~ Maxirr.um Crest Elevation and Peak Discharges (t932 - 1970) U,S, Geo~ogical Survey~ Streamgaging Stations - Smith River Basln Hydro"Joglc Data PLATES General Maps of Lake Earl - Lake Talawa Basin Page 25 27 5 13 15 22 Fo 1 lows Page 27 IA Genera·: Map of Sm:th R1 ver Basin 27 2 lake Ear! ·· Lake Taiawa - January 1970 Gage Readings 27 3 Hycirograph. Sm:th R:ve:- near Crescent City, Storm of Dec2moei- ·,96;f 27 4 Index Map of flooded Area 27 5 - 20 Flooded Areas 27 21 - 22 Smith Rive:- ·· High Water Profiles 27 23 - 25 Sml th River ·· Cross Sect! ons 27 Cover Photograph - Lake E