Copies of this repoft at $5 each may be ordered from: State of California DEPARTMENT OF WATER RESOURCES RO. Box 942836 Sacramento, CA 94236-a001 Make checks payable to Department of Water Resources. California residents add current sales taw. ON THE FRONT COVER: Mcbys Point Diversion Dam is owned by tha Calaveras County Water Dlstrln It is part of the Dlrtrtci's North Fork Stanirlaua fllver Hydroelecbfc Dmlopment Prolea Thlm constant radlru arch dam ir 189 feet hlgh wtm 8 crest length of 870 ha The dam Is on me North Fork ct me Stanislaus Wwr appmlmateiy 11 milw northeast of MUrphyS. It was completed In 1989. Photo pmvlded by Northern Callfornla Power Agency, Murphy., California. ON THE BACK COVER: O'Shaughnauay Dam It on thq Tuolumna Rlver In YosamiU National Park. The 312-foot hlgh cuwed gravity dam with a 9M)-tool cmst length Impounds tha 350,000 we-foot Hetch Hetchy R~HNo~~,th. keystone Of the City and Caurriy oi $an Francisco's water aupp)yaystom. Tho dam war inHlally completed in 1923. Enlargement to it. present helphi war completed I; 1938. photo pmvlded by Hatch Hoichy Water and Pawr System, Moccasin, Caiifornla. Department of Water Resources Bulletin 17-93 Dams Within Jurisdiction of the State of California June 1993 DOUGLAS P. WHEELER PETE WILSON DAVID N. KENNEDY Secretary for Resources Governor Director The Resources State of Department of Agency California Water Resources During construction, they identify conditions disclosed during site development which may require design changes: they check for compliance with approved plans and specifications; and they approve foundations before material is placed. The Department of Water Resources must have issued a certificate of approval based upon the findings of its personnel, before water can be impounded behind a new dam or behind an existing dam which has been enlarged, altered, or repaired. These certificates may contain restrictive conditions and may be amended or revoked by the Department of Water Resources. Operating dams are periodically inspected to assure that they are adequately maintained and to direct the owner to correct any deficiencies found. The Division conducts investigations of selected dams which include a comprehensive review of all pertinent material contained in the Division's files, a visual project inspection, technical studies when necessary and preparation of a comprehensive report. Information in this bulletin relating to dams under State jurisdiction was obtained from applications and plans submitted by owners and from surveys and supplementary information acquired during inspections and special studies. Some information on federal dams and reservoirs within California, which are not subject to State jurisdiction, is also included in this bulletin. The Department welcomes suggestions for additions and improvements from users of the Bulletin 17 series. comments may be addressed to the Division of Safety of Dams, Department of Water Resources, P. 0. Box 942836, Sacramento, CA 94236-0001. David N. Kennedy, Director Department of Water Resources The Resources Agency State of California FOREWORD On March 12, 1928, the sudden failure of St. Francis Dam in Southern California resulted in a major disaster. Because of this failure and because of the exposure to potential risk to the general populace from a number of water storage dams in California, the Legislature in 1929 enacted legislation providing for supervision over non-federal dams in the State. Before the enactment of this legislation, State supervision over dams was exercised by either the State Engineer or the State Railroad Commission. This supervision was limited in scope and extended to less than half of the dams in the State. The statute enacted in 1929 provided for (1) examination and approval or repair of dams completed prior to the effective date of the statute, August 14, 1929: (2) approval of plans and specifications, and supervision of construction of new dams, and of the enlargement, alteration, repair, or removal of existing dams; and (3) supervision over maintenance and operation of all dams of jurisdictional size. Dams under jurisdiction are artificial barriers, together with appurtenant works, which are 25 feet or more in height or have an impounding capacity of 50 acre-feet or more. Any artificial barrier not in excess of 6 feet in height, regardless of storage capacity, or that has a storage capacity not in excess of 15 acre-feet, regardless of height, is not considered jurisdictional. In 1963, the failure of the ~aldwinHills Dam, in Southern California, caused the Legislature to amend the Water Code to include within State jurisdiction, both new and existing off- stream storage facilities. The statutes governing dam safety in California, Division 3 of the Water Code, place the supervision of the safety of non- federal dams and reservoirs under the jurisdiction of the Department of Water Resources' Division of Safety of Dams. In administering Division 3 of the Water Code, the Department must comply with provisions of the California Environmental Quality Act of 1970. In compliance with that Act, all formal approval and revocation actions must be preceded by appropriate environmental documentation. The Division of Safety of Dams reviews plans and specifications for the construction of new dams or for the enlargement, alteration, repair, or removal of existing dams, under application, and must grant written approval before the owner can proceed with construction. Professional engineers and geologists from the Division evaluate each project, investigate proposed sites, and check available construction materials. iii STATE OF CALIFORNIA Pete Wilson, Governor THE RESOURCES AGENCY Douglas P. Wheeler, Secretary for Resources DEPARTMENT OF WATER RESOURCES David N. Kennedy, Director John J. Silveira Robert G. Potter Carroll M. Hamon Deputy Director Chief Deputy Director Deputy Director L. Lucinda Chipponeri Assistant Director DIVISION OF SAFETY OF DAMS Vernon H. Persson...........................................Chief This report was prepared under the supervision of Donald H. Babbitt ..............Chief, Design Engineering Branch Ronald F. Delparte .............Chief, Field Engineering Branch by Floyd Brooks........................Water Resources Technician I1 with special assistance from Ernie Tapia ...................................Assistant Engineer TABLE OF CONTENTS FOREWORD.................................................... iii ORGANIZATION AND CREDITS..................................... Vi PROVISIONS OF DIVISION 3 OF THE CALIFORNIA WATER CODE AFFECTING JURISDICTION OVER DAMS AND RESERVOIRS (Graph).... vii EXPLANATION OF TABULATED DATA... .............................viii ABBREVIATIONS....................................... xi CLASSIFICATION OF DAMS WITHIN STATE JURISDICTION (Chart).. ... X~V DAMS WITHIN THE JURISDICTION OF THE STATE OF CALIFORNIA LISTED ALPHABETICALLY BY NAME OF DAM....................... 1 DAMS WITHIN THE JURISDICTION OF THE STATE OF CALIFORNIA AND DAMS OWNED OR OPERATED BY A FEDERAL AGENCY LISTED ALPHABETICALLY WITHIN COUNTY........................ 79 RESERVOIRS WITH NAME DIFFERENT FROM NAME OF DAM.............. 111 DAMS WITHIN CALIFORNIA OWNED OR OPERATED BY AGENCIES OF THE FEDERAL GOVERNMENT.............................. 115 EXPLANATION OF TABULATED DATA This bulletin includes the name of dam, dam number, name of owner, county, stream, location, type, storage capacity, drainage area, reservoir area, crest elevation, crest length, height, total freeboard, operating freeboard, crest width, volume of dam, and year completed of each dam under jurisdiction of the State of California. All units of measure are given in the English System and the International System. Column headings introduce the data as indicated below. Abbreviations are used where necessary because of space constraints. Name of Dam as assigned by owner on application. Dam Number as assigned by the Department of Water Resources. Name of Owner as it appears on application. Natid -- National Inventory of Dams Identification Number. Parapet Code/Heiqht as measured above the dam crest in feet. If a parapet exists it is either (1) a structural wall adequate to impound water, or (2) a wall not capable of storing water. If parapet code is 1, the dam crest is the top of the parapet wall. If there is no parapet wall, the code is 3. County in which dam is located. Stream on which dam is located as named by the owner on original application or as revised to conform with USGS topographic maps. Location is section, township, range, and base line and meridian, as used in llThe System of Rectangular surveys''. Also included are latitude and longitude of the center point of the dam. TvPe of main dam only. unit for dimension items, middle line in the English System and the lower line in the equivalent SI (metric). Storase Capacity in acre-feet and decametres, including dead storage. Drainase Area in square miles and in square kilometres. viii PROVISIONS OF DIVISION 3 OF THE CALIFORNIA WATER CODE AFFECTING JLrRISDICTION OVER DAMS AND RESERVOIRS 15 50 Acre - Feet * RESERVOIR CAPACITY 1.83 metres = 6 feet 18.50 cubic dclamclrti = IS asrc-isel 7.62 metres = 25 iea 61.68 cuhic dcksmc,rcr = iO asrc~kcl vii EXPLANATION OF TABULATED DATA (Continued) Reservoir Area is acres and hectares at spillway crest elevation, or at a higher maximum water storage elevation if headworks controls are continuously used. Crest Elevation in feet and metres (USGS datum, when available: approximate USGS datum: or local datum). Crest