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 (Teale)
  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