CALIFORNIA DEPARTMENT OF FISH AND GAME GIS METADATA Lakes GeoWaterBodies of California COVERAGE NAME: g_lakes.shp METADATA FILE: g_lakes.txt METADATA DATE: April 27, 1998 COVERAGE DESCRIPTION The 'lakes geowaterbody' layer is a user created layer of lake polygons. This layer is a subset of the 'Lakes' layer desrcibed below. The lake polygons in this layer are created by the user selecting lakes from the 'Lakes' layer as needed for their assessment cycle. Lakes is a polygon coverage of several thousand California lakes and standing waters. The polygons represent lake shorelines, and the polygon attributes include lake names and codes relating to a historical database of water quality and fisheries management information. The coverage linework was prepared by the California Department of Fish and Game (DFG) Inland Fisheries Division (IFD) by extracting standing-water polygons from U.S. Geological Survey (USGS) 1:100,000-scale Digital Line Graph data (DLG-3; MINOR1 = 421 or 101: lake, pond, or reservoir). Polygon attributes were re-classified to separate actual standing waters, dry lakes, and islands within lakes. USGS Geographic Names Information System (GNIS) data were used to populate the name and code fields of the polygon attributes. Approximately 400 additional polygons were digitized by IFD from USGS 7.5'-series quads to match GNIS points that had no corresponding polygons in the DLG-3 data. The related INFO database, lakes.dat, is a product of a joint California State Water Resources Control Board (SWRCB) and DFG project called "Lakes of California, an electronically processed file" (SWRCB 1978). The coverage polygon attribute table contains a key relating to lakes.dat, WRCBLAKES. Lake polygon and attribute data integration is discussed in the methodology section below. The intended uses of this coverage include digital cartography and environmental assessment and management of lakes. Data use is unrestricted. ----- citation 1: Barrett, J.G. and A.J. Cordone. 1980. The Lakes of California. State of California Department of Fish and Game, Inland Fisheries Division Administrative Report No. 80-5. Sacramento. 10 pp.; Abstract, summary statistics, data dictionary. [complete text with insertions appended below] citation 2: Barrett, J.G. 1978. Lakes of California, an electronically processed file. California State Water Resources Control Board, Division of Planning and Research, Surveillance and Monitoring Section. Sacramento. February 1978. 121 pp. [hardcopy on file in SWRCB Headquarters library] ----- VITAL STATISTICS Standard Teale Parameters Datum: NAD 27 Projection: Albers Units: Meters 1st Std. Parallel: 34 00 00 2nd Std. Parallel: 40 30 00 Longitude of Origin: -120 00 00 Latitude of Origin: 00 00 00 False Easting (X shift): 0 False Northing (Y shift): -4,000,000 Sources: USGS DLG-3; GNIS; SWRCB Lakes; USGS 7.5' quads Source Media: digital data; published hardcopy maps Source Projection: Albers; databases: geographic coordinates Source Units: various Source Scales: 1:100,000 and 1:24,000 Capture Methods: manual digitizing, ARC/INFO identity overlays Conversion Software: ARC/INFO rev. 7.0.3 and previous Data Structure: Vector ARC/INFO Coverage Type: Polygon ARC/INFO Precision: Single ARCS: 10709 POLYGONS: 10229 NODES: 10681 Tics: 3701 Arc Segments: 341652 Polygon Labels: 10228 Polygon Attribute Bytes: 88 ARC/INFO Tolerances: Fuzzy=1.000 V; Dangle=0.100 V Layer Size: 19.87 megabytes, as uncompressed export (e00) Data Updated: May 1997 Note: This coverage is created by the user selecting appropriate lakes in the lakes coverage as needed for their assessment cycle. ----- DATA DICTIONARY Structure of Table G_LAKES.DBF COL ITEM NAME WIDTH TYPE N.DEC DESCRIPTION 1 AREA 18 F 5 Polygon area in square meters 9 PERIMETER 18 F 5 Polygon perimeter in meters 17 LAKES# 4 B - ARC/INFO use 21 LAKES-ID 4 B - ARC/INFO use 25 WATER 1 C - Water status in lake 26 NAME 47 C - Lake name 73 WRCBLAKES 4 B - Foreign key to lakes.dat 77 GNIS_ID 20 C - GNIS name code ****these items were added to the original dataset******* 88 lfdkey 11 D - Unique indentifier number 113 Wbid 25 C - WaterBody Indentifier number 173 Wbname 60 C - User assigned waterbody name ----- DETAILED ITEM DESCRIPTIONS: Item WATER Code Meaning Y = lake with standing water N = dry lake I = island within lake __ Item NAME Most of the lake names in this field have GNIS as their source. If the GNIS_ID is null and the lake name field is populated, then the lake name source is lakes.dat (SWRCB/DFG related database). __ Item WRCBLAKES Foreign key (relate item) from lakes.pat to INFO database lakes.dat, containing information on water quality and fisheries management. Lakes.dat described below. __ Item GNIS_ID USGS Geographic Names Information System (GNIS) code uniquely identifying the instance of the given lake name. This code is particularly useful for common lake names such as 'Bear Lake', 'Cold Lake', etc... ----- COVERAGE PROCESSING METHODOLOGY The NAME and WRCBNAME lake attributes were produced by integrating the lakes polygon coverage with two separate point coverages: 1) USGS Geographic Names Information System (GNIS) names. DFG generated a point coverage from latitude and longitude coordinates contained within GNIS records. 2) "lakes.dat" lake names and attributes. DFG generated a point coverage by parsing the original character strings for lat/long into their component degrees, minutes, seconds. Each point coverage was overlaid with the lakes polygon coverage. In the first overlay process, the GNIS lake name was transferred from each GNIS point to its enclosing lake polygon. In the second overlay process, the record number of the point from lakes.dat was transferred to the lake polygon attribute table, making it possible to link (relate) that polygon to a record in the lakes.dat database. Lakes.dat itself was not altered nor permanently joined to lakes.pat. Points that failed to produce an exact match during the lake polygon overlays were individually reviewed. Published USGS hardcopy maps and gazetteers (DeLorme) were used to manually encode correct lake names in cases where points and polygons existed, but did not properly coincide. New lake polygons were digitized where no DLG-3 polygons existed to enclose GNIS points. An ARC/INFO relate environment can be set up between lakes.pat and lakes.dat on the item WRCBLAKES to match selected lake polygons to lake attribute data. ARCVIEW users can use LINK or JOIN procedures to get similar results. ----- DESCRIPTION OF RELATED INFO DATABASE LAKES.DAT ABSTRACT Geographical and environmental data for the lakes and reservoirs of California are contained in the Lakes of California File developed by the State Water Resources Board and the Department of Fish and Game under Interagency Agreement 4090400. These waters total about 4,900 with a surface area of about 1,400,000 acres. Totals for lakes and surface area supporting fishlife approximate 4,700 and 1,200,000 acres, respectively. This database was prepared in response to Section 314 of the federal Water Pollution Control Act of 1972 (PL 92-500), whereby the SWRCB implemented a program to identify, describe, and classify according to trophic status the freshwater lakes and reservoirs statewide. This report briefly describes the File and some of the data and defines the terms used in the tables. See also comprehensive program document on file with State Water Resources Control Board (citation 2, above). The full text of citation 1 is included below. Contacts and specializations: Paul Veisze DFG/TSB GIS Unit, 916-323-1667, data coordination, documentation Mike Byrne DFG/TSB GIS Unit, 916-654-7631, ARC/INFO programming, data integration Isaac Oshima DFG/TSB GIS Unit, 916-752-0532, GIS applications, Avenue programming Suzanne Lowell SWRCB, 916-657-1830, SAS access at CA Teale Data Center mainframe Bernice Hammer DFG/TSB Biometrics, 415-688-6345, SAS - .dbf conversion ----- [NOTE: The listing below was provided upon request by DFG from SWRCB. Fields are in sequential order; the actual INFO table, lakes.dat, has been slightly modified by DFG to accomodate data conversion from SAS to ARC/INFO. This listing is presented to preserve original field descriptions generated by SWRCB. There are minor discrepencies between this listing and that in the SWRCB (1978) document "Lakes of California".] [begin SAS database structure listing] -------------------------------------------------------------------------------- The SAS System 09:44 Monday, February 27, 1995 1 [NOTE: original database published in 1978; present database is a SAS re-creation by DFG, then converted to an INFO database (ARC/INFO)] CONTENTS PROCEDURE Data Set Name: G.GIS (LAKES) Observations: 4955 Member Type: DATA Variables: 78 Engine: V608 Indexes: 0 Created: 13:05 Tuesday, February 14, 1995 Observation Length: 944 Last Modified: 12:41 Wednesday, February 22, 1995 Deleted Observations: 0 (SAS file converted to .dbf) Protection: Compressed: NO Data Set Type: Sorted: NO Label: ----Engine/Host Dependent Information----- Data Set Page Size: 16384 Number of Data Set Pages: 293 File Format: 607 First Data Page: 1 Max Obs per Page: 17 Obs in First Data Page: 6 -----List of Variables and Attributes----- [NOTE: Field numbers are local to this listing. This listing is a subset of the original database published in "Lakes of California" (SWRCB 1978). Field numbers shown below do not match those in the original publication.] Fields indicated as 'Num 8' were converted to 16-place integers in INFO; Character fields were unchanged. Field # Variable Type Len Pos Label --------------------------------------------------------------------- 1 F_G_CD Char 1 0 *FISH & GAME*[Region] CODE 2 OWNER Char 34 1 *OWNER *NAME 3 OWNRTYPE Char 3 35 *OWNER*TYPE 4 REC_NUM Char 40 38 *REC*NUMBER 5 MAX_AREA Num 8 78 *MAXIMUM AREA*(ACRES) 6 MXAREF Char 7 86 *MAX AREA*REF 7 SUM_SURF Num 8 93 *SUMMER SURFACE*AREA (ACRES) 8 S_S_REF Char 7 101 *SUMMER SURFACE*REF 9 MAXDEPTH Num 8 108 *MAXIMUM*DEPTH (FEET) 10 M_D_REF Char 7 116 *MAX DEPTH*REF 11 AB_G_F1 Char 20 123 *MOST ABUNDANT*GAME FISH 12 AB_G_F2 Char 20 143 *2ND MOST ABUNDANT*GAME FISH 13 AB_G_F3 Char 20 163 *3RD MOST ABUNDANT*GAME FISH 14 OTH_NAM Char 25 183 *OTHER*LAKE NAME 15 DEP_FL Num 8 208 *DEPTH (FT)*FLUCTUATION 16 DP_F_REF Char 7 216 *DEPTH*FLUCTUATION REF 17 MIN_SURF Num 8 223 *MINIMUM*SURFACE (ACRES) 18 M_S_REF Char 7 231 *MINIMUM*SURFACE REF 19 PRI_PROD Num 8 238 *PRIMARY*PRODUCTIVITY 20 L_Q_REF Char 7 246 *LAKE*QUALITY REF 21 DAM Num 8 253 *DAM*NUMBER 22 D_NAME Char 25 261 *DAM*NAME 23 LATITUDE Char 9 286 *LATITUDE* 24 LONGITUD Char 10 295 *LONGITUDE* 25 TOWNSHIP Char 13 305 *TOWNSHIP*RANGE/SECTION 26 OPERATOR Char 25 318 *OPERATOR* 27 INFLOW1 Char 15 343 *PRINCIPAL*INFLOW 28 INFLOW2 Char 15 358 *SECONDARY*INFLOW 29 INFLOW3 Char 15 373 *THIRD*INFLOW 30 MAX_VOL Num 8 388 *MAXIMUM VOL*(ACRE FEET) 31 M_V_REF Char 7 396 *MAXIMUM*VOLUME REF 32 MIN_VOL Num 8 403 *MINIMUM VOL*(ACRE FEET) 33 AV_DPTH Num 8 411 *AVERAGE*DEPTH (FT) 34 A_D_REF Char 7 419 *AVERAGE*DEPTH REF 35 N_G_FSH1 Char 20 426 *NONGAME*FISH #1 36 N_G_FSH2 Char 20 446 *NONGAME*FISH #2 37 N_G_FSH3 Char 20 466 *NONGAME*FISH #3 38 FISH_YLD Num 8 486 *FISH YIELD*(LBS/ACRE) 39 F_Y_REF Char 7 494 *FISH*YIELD REF 40 FSH_CROP Num 8 501 *FISH CROP*(LBS/ACRE/YR) 41 F_C_REF Char 7 509 *FISH CROP*REF 42 EUPHOT Char 4 516 *DEPTH OF*EUPHOTIC ZONE (FT) 43 E_Z_REF Char 7 520 *EUPHOTIC*ZONE REF 44 THERMO Num 8 527 *DEPTH(FT) TO*THERMOCLINE 45 COUNTY Char 40 535 *COUNTY*NAME 46 QUAD Char 12 575 *QUADRANT 47 OUTFLOW Char 15 587 *OUTFLOW* 48 DRN_AREA Num 8 602 *DRAINAGE*AREA (SQ MILES) 49 D_A_REF Char 7 610 *DRAINAGE*AREA REF 50 ELEVAT Num 8 617 *ELEVATION*(FEET) 51 ELE_REF Char 7 625 *ELEVATION*REF 52 T_S_REF Char 7 632 *TROPHIC*STATE REF 53 DOM_FSH1 Char 20 639 *DOMINANT*SPORTFISH #1 54 DOM_FSH2 Char 20 659 *DOMINANT*SPORTFISH #2 55 DOM_FSH3 Char 20 679 *DOMINANT*SPORTFISH #3 56 D_F_REF Char 7 699 *DOMINANT*FISH REF 57 NUISANCE Char 24 706 *NATURE OF*NUISANCE PROB. 58 N_REF Char 7 730 *NUISANCE*REF 59 IMP_WTR Num 8 737 *% OF IMPORTED*WATER 60 I_W_REF Char 7 745 *IMPORTED*WATER REF 61 LKNAM_FM Char 25 752 *LAKE*NAME 62 LAK_NM_F Num 8 777 *LAKE*NUMBER 63 ACC_FMT Char 9 785 *ACCESS*CODE 64 LAK_FMT Char 11 794 *LAKE OR*RESERVOIR 65 ACCR_FM Char 8 805 *ACCURACY*CODE 66 CAL_FM Char 10 813 *DEPTH CALC*METHOD 67 TRO_FM Char 12 823 *TROPHIC*STATE 68 FISH_FM Char 13 835 *FISHERY*PRODUCTION 69 FSHRY_FM Char 7 848 *FISHERY*TYPE 70 F_PLT_FM Char 8 855 *FISH PLANTING*PROGRAM 71 SIGN_FM Char 3 863 *SIGNIFICANT*LAKE? 72 STRAT_FM Char 3 866 *DOES LAKE*STRATIFY 73 OFLO_FM Char 3 869 *OUTFLOW*REGULATED 74 N_PK_FM Char 19 872 *NATIONAL PARK*NUMBER 75 N_F_FM Char 14 891 *NATIONAL FOREST*NUMBER 76 W_P_FM Char 19 905 *WILD/PRIMITIVE*AREA NUM 77 DWR_FM Char 16 924 *DWR*CODE 78 LAK_Q_FM Char 4 940 *LAKE*QUALITY ----------------------------------------------------------------------------- [end SAS database structure listing.] [NOTE: DFG/IFD added the following fields to the INFO version of above database. WRCBLAKES relates to lakes.pat; the geographic coordinates fields break up the original lat/long character fields into more useable numeric fields; and LAKES is a user flag]: xx WRCBLAKES Num 4 xxx -ALTERNATE PRIMARY KEY xx LATD Num 2 xxx -LATITUDE DEGREES xx LATM Num 2 xxx -LATITUDE MINUTES xx LATS Num 4.1 xxx -LATITUDE SECONDS AND TENTHS xx LOND Num 3 xxx -LONGITUDE DEGREES xx LONM Num 2 xxx -LONGITUDE MINUTES xx LONS Num 4.1 xxx -LONGITUDE SECONDS AND TENTHS xx LAKES Num 1 xxx -USER FLAG ----- [The following text is from a scan and optical character recognition of CA Dept. Fish and Game Inland Fisheries Division Administrative Report 80-5; edited 5-19-97; it contains sections for an Abstract, Methodology, Data Dictionary and a data summary table. The Data Dictionary contained in the 'DEFINITIONS' section below includes insertions dated 5/19/97, copying field dimensions and descriptions from the above listing.] ----------------------------------------------------------------------------- State of California The Resources Agency DEPARTMENT OF FISH AND GAME THE LAKES OF CALIFORNIA by John G. Barrett State Water Resources Control Board and Almo J. Cordone Inland Fisheries Branch Inland Fisheries Administrative Report No. 80-5 May 1980 ----- THE LAKES OF CALIFORNIA-1/ by John G. Barrett-2/ and Almo J. Cordone-3/ Key geographical and environmental data for the lakes and reservoirs of California are contained in the Lakes of California File developed by the State Water Resources Control Board. These waters total about 4,900 with a surface area of about 1,400,000 acres. Totals for those supporting fishlife approximate 4,700 waters and 1,200,000 acres. Four printout tables containing data of special interest to fisheries workers were retrieved from the File. Because of the large number of lakes and reservoirs involved, they were too voluminous to include with this report. Each regional headquarters of the Department of Fish and Game has a copy of the tables for lakes and reservoirs within its boundaries. These are available for use and study by interested parties. This report briefly describes the File and some of the data and defines the terms used in the tables. __________________________________________________________________ 1-/Inland Fisheries Administrative Report No. 80-5. Submitted January 1980. 2-/State Water Resources Control Board, Sacramento. 3-/Inland Fisheries Branch, Sacramento. ----- INTRODUCTION The State Water Resources Control Board has developed the Lakes of California File, an electronically processed computer file containing geographical and environmental data on California lakes and reservoirs. Data stored in the File were gathered by the Department of Fish and Game under contract with the Board and with primary supervision by the Board's Surveillance and Monitoring Unit. The primary purpose of this program was to summarize existing information on lakes and reservoirs so that statewide priorities for additional data collection needs and possible restoration activities could be established and carried out. Four printout tables containing data of special interest to fisheries workers were retrieved from the File. There are several reasons for preparing these tables: i) the data will assist in answering inquiries from other agencies and the public, ii) the data should prove useful for various local, regional, or State planning efforts, and iii) the data in such readily available form may stimulate more complex analyses including the development of a lake classification system and assessing relationships between fish populations and various environmental variables. The latter could have practical management significance. The purpose of this report is to alert fisheries workers to the existence of the Lakes of California File and the four basic printout tables of special interest to them. Detailed definitions of the terms used in the tables are also included in this report. ----- METHODS Department personnel visited a number of State and federal agencies to obtain data from their files. Published and unpublished reports were perused as were maps of the U. S. Geological Survey, U. S. Forest Service, U. S. Bureau of Land Management, and Department of Fish and Game. Information for each lake was entered on three basic forms designed to meet the needs of various State agencies. Full details of the program along with directions for acquiring specific information are described by Barrett (Lakes of California, an Electronically Processed File. 1978. State Water Resources Control Bd., Div. of Planning and Research, Surveillance and Monitoring Unit, 121 p.). ----- LIMITATIONS The Lakes of California File is the first attempt to compile, in a computerized format, geographical and environmental data on individual lakes and reservoirs for the entire State. The data were gleaned from widely scattered sources and reflect varying degrees of accuracy and completeness. We caution that the appearance of these data in printed form is no guarantee of exactness. We urge that those familiar with these waters make an effort to correct mistakes and fill in the blanks. The listings of fishes are especially weak and will vary with time. The question of how to deal with the numerous unnamed lakes remains unsolved. Future revisions can be expected and your help will ensure greater accuracy and hence greater value of the File. ----- RESULTS Because of the large number of lakes and reservoirs involved, the four printout tables were too voluminous to include with this report. However, each regional headquarters of the Department of Fish and Game has a copy of the tables for waters within its boundaries. These are available for use and study by interested parties. The definitions included in the following section are to be used in conjunction with the printout. Only a summary of the number and surface area of lakes and reservoirs is presented here (Table 1). As delimited by our definitions of lakes and reservoirs, California contains 4,922 such bodies of water with a surface area of 1,397,534 acres. These consist of 3,648 lakes (812,828 acres) and 1,274 reservoirs (548,706 acres). Most of the lakes :90%) support coldwater fisheries and most of the reservoirs (47%) support warmwater fisheries. One hundred and ninety-one lakes and reservoirs (211,056 acres) do not support fishlife. The majority of the coldwater lake fisheries (57%) are located in Region 4 and the bulk of the coldwater reservoir fisheries (42%) in Region 2. There are relatively few warmwater lake fisheries in the State. Warmwater reservoir fisheries are most numerous in Regions 3 and 5 (34 and 31%, respectively). If Lake Tahoe is excluded, Region 2 ranks third behind Regions 1 and 4 in surface area supporting coldwater lake fisheries. The highest acreage of coldwater reservoir fisheries are found in both Regions 1 and 2 and Regions 4 and 5 contain the most acreage in warmwater reservoir fisheries. ----- DEFINITIONS [NOTE: The following field definitions have been inserted from the above listing of the database structure of lakes.dat. They are not part of the original document scan IFD AR 80-5. Not all variables listed above are described below. See SWRCB (1978) and appendices for complete data dictionary; corrections/revision by DFG are enclosed in square braces] [Decoding Reference Fields: Reference (REF) fields give information as to the source of the data entered for variables such as lake depth, area, fish species, etc. Each reference code is a 7-byte string]: Byte(s) Element / Code Meanings 1 Accuracy statement [in order of increasing quality]: O = Personal observation or opinion E = Estimate based on some data F = Fact based on acquired data 2,3 Date: the last two digits of the year the fact or estimate was determined 4-7 Agency code of the source supplying the fact or estimate: 1 = State Water Resources Control Board 001 thru 009 = Region 1 thru 9 files 010 = Basin Plans 2 = Department of Fish and Game 001 thru 005 = Region 1 thru 5 files 3 = Department of Water Resources 001 = Northern District 002 = Central District 003 = San Joaquin District 004 = Southern District 005 = Division of Safety of Dams (DWR Bulletin 17) 4 = U.S. Geological Survey 000 = USGS quads 001 = USGS Open File Report "An Inventory of Lakes in CA" 5 = National Park Service (NPS), numbered in alphabetical order 6 = USDA Forest Service (USFS), numbered in alphabetical order Example: M_D_REF (Maximum lake depth reference) = E522002 E = Estimate 52 = 1952 2 = Dept. Fish and Game 002 = Region 2 files ----- [Begin detailed field descriptions] Field # Variable Type Length Pos Label --------------------------------------------------------------------- [NOTE: Field numbers are local to this document. These fields are a subset of the original database published in "Lakes of California" (SWRCB 1978). Field numbers shown match the above listing, not the original publication nor the converted INFO database "lakes.dat".] __ 61 LKNAM_FM Char 25 752 *LAKE*NAME Lake Name: The name of the lake as shown on current USGS topographic maps or other official sources. When the lake name contains the word "lake" or "reservoir" as a descriptor, as in Lake Tahoe or Nacimiento Reservoir, these descriptors will not be shown as part of the lake name. __ 62 LAK_NM_F Num 8 777 *LAKE*NUMBER Lake Number: A unique number based on the State Water Resources Control Board Hydrologic Unit in which the lake lies. __ 45 COUNTY Char 40 535 *COUNTY*NAME County: The name of the county in which the lake lies. __ 64 LAK_FMT Char 11 794 *LAKE OR*RESERVOIR Lake or Reservoir Code: LAKE A body of naturally-impounded water not influenced by tidal fluctuations. In addition, the water body must normally maintain a pool throughout the year and must-have a maximum surface area of at least 1 acre or support a self-sustaining sport fishery. RESERVOIR A man-made impoundment of water which increases the surface area size of the existing lake (if any) by at least 100%. In addition, the reservoir must retain at least 50 acre-ft of water or have a dam at least 25 ft in height as specified in Title 23 of the California Administrative Code, Section 301(b). (See also CA Dept. Water Resources Bulletin 17: Dams within the jurisdiction of the State of California; see also coverage damjur, metadata damjur.txt). INFLUENCED A body of water that is sometimes influenced by the ocean for short periods. FLOOD_CNTRL The lake bed is normally dry, but periodically retains water. __ 21 DAM Num 8 253 *DAM*NUMBER 22 D_NAME Char 25 261 *DAM*NAME Dam Name: The official dam name and number as stated in the State of California Department of Water Resources Bulletin 17-76, "Dams within the Jurisdiction of the State of California". __ 23 LATITUDE Char 9 286 *LATITUDE* 24 LONGITUD Char 10 295 *LONGITUDE* Latitude and Longitude: The approximate center of the lake is given in degrees, minutes, and seconds for both latitude (north) and longitude (west). [The DFG GIS Unit has disaggregated these two fields 3 separate degrees, minutes, seconds fields, each for LAT/LON] __ 25 TOWNSHIP Char 13 305 *TOWNSHIP*RANGE/SECTION Township, Range, Section: Location of lake according to USGS quad map. The letter following some section numbers designates the 1/16 section starting with A in the upper right and ending with R in the lower right (I and O are not included). Each lake is designated by the appropriate Base and Meridian; H (Humboldt), M (Mount Diablo), S (San Bernardino). __ 27 INFLOW1 Char 15 343 *PRINCIPAL*INFLOW 28 INFLOW2 Char 15 358 *SECONDARY*INFLOW 29 INFLOW3 Char 15 373 *THIRD*INFLOW Principal Inflow: The name of the major stream, creek, or river flowing into the lake, in order of significance. __ 47 OUTFLOW Char 15 587 *OUTFLOW* Principal Outflow: The name of the major stream, creek, or river flowing out of the lake. __ 2 OWNER Char 34 1 *OWNER *NAME Name of Owner: The name of the individual, company, or agency that owns the lake or reservoir. __ 3 OWNRTYPE Char 3 35 *OWNER*TYPE Type of Ownership: Type of ownership of the shoreline around the lake. PUB - Public PRV - Private BPP - Both Public and Private __ 26 OPERATOR Char 25 318 *OPERATOR* Name of Operator: The name of the company or agency that operates the lake or reservoir. This applies only if the name of the owner and operator are different. __ 75 N_F_FM Char 14 891 *NATIONAL FOREST*NUMBER[NAME] National Forest: The name of the National Norest in which a lake or any part of it lies. This also includes lakes totally on private land, but within an inholding or within the forest's official boundary as shown on USFS maps. The following forests are recognized: Angeles Mendocino Cleveland Modoc E1 Dorado Plumas Inyo Rogue River Klamath San Bernardino Lassen Sequoia Los Padres Shasta-Trinity Sierra Stanislaus Siskiyou Tahoe Six Rivers Toiyabe __ 74 N_PK_FM Char 19 872 *NATIONAL PARK*NUMBER[NAME] National Park: The unit of the National Park Service (NPS) in which a lake or any part of it lies. This also includes lakes totally on private land but within an inholding or within the official unit boundary as shown on USFS, USGS, or NPS maps. The following units of the NPS are recognized: [Data available only for units marked *] Cabrillo Lava Beds Channel Islands Pinnacles Death Valley Point Reyes Devils Postpile Redwood Golden Gate Shasta Joshua Tree Trinity *Kings Canyon *Whiskeytown *Lassen Volcanic *Yosemite *Sequoia __ 76 W_P_FM Char 19 905 *WILD/PRIMITIVE*AREA NUM[NAME] Wilderness or Primitive Area: The officially designated USDA Forest Service (USFS) wilderness or primitive area in which a lake or any part of it lies. This also includes lakes totally on private land but within an inholding or within the area's boundary as shown on USFS maps. The following wilderness or primitive areas are recognized: Agua Tibia Mokelumne Caribou Salmon-Trinity Alps Cucamonga San Gabriel Desolation Valley San Gorgonio Dome Land San Jacinto Emigrant Basin San Rafael Golden Trout Santa Lucia Hoover South Warner High Sierra Thousand Lakes John Muir Ventana Marble Mountains Yolla Bolly-Middle Eel Minarets __ 5 MAX_AREA Num 8 78 *MAXIMUM AREA*(ACRES) 6 MXAREF Char 7 86 *MAX AREA*REF Maximum Surface Area (acres): Maximum operational surface area of the lake in acres. For natural lakes, this will be the largest known surface area of the lake. For lakes where the outflow of the lake is regulated, this will be the maximum surface area to the spillway. See also reference code for source of data on maximum area, described above. __ 7 SUM_SURF Num 8 93 *SUMMER SURFACE*AREA (ACRES) 8 S_S_REF Char 7 101 *SUMMER SURFACE*REF Midsummer Surface Area (acres): The surface area of the lake that represents the average surface area during the peak recreation season. This is based on surface area records of August 1. See also reference code described above. __ 30 MAX_VOL Num 8 388 *MAXIMUM VOL*(ACRE FEET) 31 M_V_REF Char 7 396 *MAXIMUM*VOLUME REF Maximum Volume (acre-ft): The maximum volume of the lake. Based on the same criteria stated for maximum surface area. See reference field described above. __ 9 MAXDEPTH Num 8 108 *MAXIMUM*DEPTH (FEET) 10 M_D_REF Char 7 116 *MAX DEPTH*REF Maximum Depth (ft): Depth in feet from the maximum water surface level to the deepest point in the lake. Reference field described above. __ 33 AV_DPTH Num 8 411 *AVERAGE*DEPTH (FT) 34 A_D_REF Char 7 419 *AVERAGE*DEPTH REF Average Depth (ft): The average depth of the lake during maximum storage. This may be determined by fathometer readings, planimetry of known contours, or by dividing the maximum volume by the maximum surface area. Reference field described above. __ 48 DRN_AREA Num 8 602 *DRAINAGE*AREA (SQ MILES) 49 D_A_REF Char 7 610 *DRAINAGE*AREA REF Drainage Area (sq. miles): The drainage area includes all the land area that can yield inflow to the lake plus the surface area of the lake itself. Reference described above. __ 50 ELEVAT Num 8 617 *ELEVATION*(FEET) 51 ELE_REF Char 7 625 *ELEVATION*REF Elevation (ft): The maximum water surface elevation of the lake in feet above mean sea level as shown on USGS topographic maps. Reference described above. __ 67 TRO_FM Char 12 823 *TROPHIC*STATE 52 T_S_REF Char 7 632 *TROPHIC*STATE REF Trophic State:[Note: disjunct field positions] Trophic State Lake Characteristics ------------- -------------------- Dystrophic Boggy High in humic acids Dark brown-colored water Oligotrophic Generally supports coldwater fish Very transparent water Few littoral plants Color - blue Low concentrations of algae in water Mesotrophic Medium levels of algal growth supported Water of medium transparency Some littoral plants Eutrophic Generally supports warmwater fish Water - turbid, low transparency High concentrations of algae in water Color - greenish Dense growth of littoral plants Intermittent Intermittent lake, periodically dries up __ 68 FISH_FM Char 13 835 *FISHERY*PRODUCTION Estimated Fishery Production: The lake's fish production rating of high, medium, or low. In this context, nonproductive lakes are those which, for whatever reason, do not support fishlife. __ 69 FSHRY_FM Char 7 848 *FISHERY*TYPE Fishery Type: An assessment of the dominant type of sport fishery. Type Fishery Characteristics ---- ----------------------- Warm Warmwater lakes are those in which the dominant fishery is for warmwater fishes, and which do not contain water suitable for trout the year around. Cold Coldwater lakes are those in which the dominant fishery is for salmonid fishes; does not include warmwater lakes that are planted seasonally with catchable trout. Mixed Combination lakes which support populations of both salmonid and warmwater fishes, and in which at least 5% of the water volume is suitable for trout throughout the year. Suitable water is defined as 70 F or less with at least 5 ppm dissolved oxygen. No fishery Lakes which do not support sport fishes the year around, e.g., intermittent lakes, barren lakes, winterkill lakes, Mono Lake. __ 70 F_PLT_FM Char 8 855 *FISH PLANTING*PROGRAM Fish Planting Program: Type Fish Planting Program Characteristics ---- ------------------------------------- None A lake whose fishery is sustained entirely by natural propagation. Also included, however, are lakes receiving an occasional plant to establish or reestablish a game or forage fish species. State A lake whose fishery is maintained or enhanced by periodic plants of game fishes. The fish planted in such lakes are those reared at either State or federal hatcheries. Private Same as "State" planted lakes above, except the fish are reared at privately owned hatcheries. BothLakes periodically planted with fish reared at both privately-owned and State or federal hatcheries. __ 11 AB_G_F1 Char 20 123 *MOST ABUNDANT*GAME FISH 12 AB_G_F2 Char 20 143 *2ND MOST ABUNDANT*GAME FISH 13 AB_G_F3 Char 20 163 *3RD MOST ABUNDANT*GAME FISH Most Abundant Game Fish: The four [3] most abundant species of game fish which are actively sought by fishermen, listed in descending order. This refers to their relative abundance in the lake, not in the creel [angler survey]. __ 35 N_G_FSH1 Char 20 426 *NONGAME*FISH #1 36 N_G_FSH2 Char 20 446 *NONGAME*FISH #2 37 N_G_FSH3 Char 20 466 *NONGAME*FISH #3 Most Abundant Nongame Fish: The four [3] most abundant species of non-game fish in the lake, listed in descending order. __ 53 DOM_FSH1 Char 20 639 *DOMINANT*SPORTFISH #1 54 DOM_FSH2 Char 20 659 *DOMINANT*SPORTFISH #2 55 DOM_FSH3 Char 20 679 *DOMINANT*SPORTFISH #3 Dominant Sport Fish: The four [3] species of game fish most numerous in the sport take [creel, or angler survey], listed in descending order. ----- [end DEFINITIONS section, edited 5/19/97] ----- SUMMARY STATISTICS TABLE 1. Number of Surface Area of Lakes and Reservoirs in California.-1/ See footnotes below. _______________________________________________________________________________ Total Reservoir Number Number lakes and Lake area area Total area Fishery type lakes reservoirs reservoirs (acres) (acres) (acres) _______________________________________________________________________________ Coldwater 440 75 515 34,829.4 34,160.6 68,990.0 Mixed 52 65 117 2,974.5 74,252.0 77,226.5 Warmwater 15 63 78 145,832.3 17,868.0 163,770.3 No fishery 72 12 84 146,826.3 5,844.0 152,670.3 Region 1 totals-2/ 579 215 794 330,462.5 132,124.6 462,587.1 ------------------------------------------------------------------------------- Coldwater 417 127 544 129,358.0 34,816.4 164,174.4 Mixed 11 91 102 61.6 83,506.5 83,568.1 Warmwater 22 93 115 1,083.0 23,540.5 24,623.5 No fishery 23 6 29 130.4 386.0 516.4 Region 2 totals-3/ 473 317 790 130,633.0 142,249.4 272,882.4 ------------------------------------------------------------------------------- Coldwater 8 15 23 373.0 802.0 1,175.0 Mixed 12 67 79 271.0 35,961.0 36,232.0 Warmwater 42 203 245 44,423.2 32,143.5 76,566.7 No fishery 0 9 9 0.0 404.0 404.0 Region 3 totals-4/ 62 294 356 45,067.2 69,310.5 114,377.7 ------------------------------------------------------------------------------- Coldwater 1,874 49 1,923 19,549.8 18,194.8 37,744.6 Mixed 15 38 53 84.0 46,874.0 46,958.0 Warmwater 12 56 68 656.7 70,990.4 71,647.1 No fishery 37 7 44 222.9 508.6 731.5 Region 4 totals-5/ 1,938 150 2,088 20,513.4 136,567.8 157,081.2 ------------------------------------------------------------------------------- Coldwater 530 37 567 6,668.4 14,628.0 21,296.4 Mixed 5 64 69 44.0 17,971.3 18,015.3 Warmwater 46 186 232 5,506.0 69,054.0 74,560.0 Salton Sea 1 - 1 220,000.0 - 220,000.0 No fishery 1411 - 25 53,933.5 2,800.0 56,733.5 Region 5 totals 596 298 894 286,151.9 104,453.3 390,605.2 ------------------------------------------------------------------------------- _______________________________________________________________________________ STATWIDE TOTALS Total Reservoir Number Number lakes and Lake area area Total area Fishery type lakes reservoirs reservoirs (acres) (acres) (acres) _______________________________________________________________________________ Coldwater 3,269 303 3,572 190,778.6 102,601.8 293,380.4 Mixed 95 325 420 3,435.1 258,564.8 261,999.9 Warmwater 137 601 738 197,501.2 213,596.4 411,097.6 Salton Sea 1 - 1 220,000.0 - 220,000.0 No fishery 146 45 191 201,113.1 9,942.6 211,055.7 Statewide total 3,648 1,274 4,922 812,828.0 548,705.6 1,397,533.6 _______________________________________________________________________________ Footnotes -1/Those portions of lakes and reservoirs (Goose, Tahoe, Topaz, Havasu, Imperial, and Laguna lakes) extending into adjacent states are included in the California totals. -2/All of Homer and Juniper lakes included in Region 1 totals. -3/All of Black Butte and Utlca lakes included in Region 2 totals. -4/All of Twitchell Lake included in Region 3 totals. -5/All of Goodwin, Melones, and Tulloch lakes included in Region 4 totals. =========================================================================== ----- end scan/OCR of DFG/IFD AR 80-5; edited 5-19-97 --- DATA QUALITY ASSESSMENT The Lakes of California File is the first attempt to compile, in a computerized format, geographical and environmental data on individual lakes and reservoirs for the entire State. The data were gleaned from widely scattered sources and reflect varying degrees of accuracy and completeness. We (Barrett and Cordone 1980) caution that the appearance of these data in printed form is no guarantee of exactness. We urge that those familiar with these waters make an effort to correct mistakes and fill in the blanks. The listings of fishes are especially weak and will vary with time. The question of how to deal with the numerous unnamed lakes remains unsolved. Future revisions can be expected and your help will ensure greater accuracy and hence greater value of the File. Line quality of the polygon coverage is good. Attribute completeness of names and name codes is very good in the lakes.pat polygon attribute table. While attribute completeness is only fair within the lakes.dat INFO database, the wide array of attributes presents an excellent structure for scientific and management analysis of lakes. Extensive use of "reference" (REF) fields provides valuable metadata on the sources and dates of data entries. There are discrepencies between the field listing of lakes.dat and the SWRCB (1978) document "Lakes of California", due to two reasons: 1) DFG added individual fields for latitude and longitude degrees, minutes, and seconds, and 2) DFG received from SWRCB a database that appears to be a subset of the original. In addition, the conversion from the SWRCB SAS database format to DFG's INFO resulted in field type changes from [Numeric 8] to [Integer 16], respectively. Null values in the SAS numeric fields also appear to be corrupt in INFO, although actual data values appear to be intact. Character strings were unaffected by the database conversion. Refer to the original document SWRCB (1978) for additional quality assessment information. ----- DATA CONTACT Karen Beardsley (Information Center for the Environment) (530) 752-0532