VARNUM NAME LABEL TYPE LENGTH 1 SITE_ID ID Assigned to Each Site 2 25 2 VISIT_NO Sequential Visit Number Within Year 1 3 SAMPLED Site Sampled Code 2 30 4 DATE_COL Date Sample Collected 1 5 REPEAT Repeat visit lake (YES/blank) 2 3 6 SITE_TYPE PROB_Samp: Lake is from probability sample and can be used for population estimation. REF_Lake: Lake is not from probability sample and was selected as a candidate reference lake 2 10 7 LAKE_SAMP "Eval. status. _Denied (access denied). _Inaccess (physically inaccessible). _Other. _LT_4ha (< 4ha). _Shallow (< 1m deep). _Vegetated (< 1000 m2 open H2O). _Saline (tidal). Special_Purpose (aquacult., disposal, WWT, or evap.). Not_Lake (other)" 2 20 8 TNT Target:Non-target evaluation status derived from LAKE_SAMP 2 10 9 LON_DD Longitude (decimal degrees) obtained from NHD (NAD83) 1 10 LAT_DD Latitude (decimal degrees) obtained from NHD (NAD83) 1 11 ALBERS_X x-coordinate from Albers projection (meters) 1 12 ALBERS_Y y-coordinate from Albers projection (meters) 1 13 FLD_LON_DD Longitude (decimal degrees) recorded from the field form (lake verification) 1 14 FLD_LAT_DD Latitude (decimal degrees) recorded from the field form (lake verification) 1 15 FLD_SRC "Field location source: Index_Site: location where index sample was taken. Launch_Site: point where boat was launched. Map_Loc: Location obtained from design file. Priority: lake index site; then launch site, then map location" 2 11 16 FLD_FLAG Not NHD Lake-reference lake not found in NHD. Not in NHD lake polygon-field location was not found in NHD lake polygon 2 24 17 ST State two letter code 2 2 18 STATE_NAME STATE_NAME 2 14 19 CNTYNAME County name 2 20 20 EPA_REG EPA Region 2 9 21 NHDNAME Lake name (from NHD) 2 50 22 LAKENAME Lake name (from field forms) 2 50 23 AREA_CAT7 Lake area unequal probability category (7 categories) 2 10 24 NESLAKE NESLake-Lake was included in 1970s National Eutrophication Survey 2 7 25 NESLAKE_ID NESLake-Lake was included in 1970s National Eutrophication Survey 2 8 26 STRATUM Probability survey design stratum. NLALake is single stratum 2 8 27 PANEL Panel_1-lake was included in base design. OverSamp-Lake was part of over sample of lakes used for replacing lakes in base design if they could not be sampled 2 8 28 DSGN_CAT Probability survey design categories used to assign unequal probability of selection 2 15 29 MDCATY Unequal selection probability for lake 1 30 WGT Initial site weight based on base design. DO NOT USE for population estimation 1 31 WGT_NLA Adjusted site weight. USE for population estimation 1 32 ADJWGT_CAT Categories used to adjust initial design weight (WGT) to account for use of over sample lakes. 2 5 33 URBAN URBAN LAKE? (YES/NO) 2 3 34 WSA_ECO3 Wadeable Stream Assessment three aggregrated Omernik level 3 ecoregions 2 6 35 WSA_ECO9 Wadeable Stream Assessment nine aggregrated Omernik level 3 ecoregions 2 3 36 ECO_LEV_3 Omernik level 3 ecoregion number 2 2 37 ECO_L3_NAM Omernik level 3 ecoregion name 2 60 38 NUT_REG "Nutrient ecoregion, based on EPA nutrient criteria documents for lakes & reservoirs)" 2 4 39 NUTREG_NAME Nutrient ecoregion name 2 60 40 ECO_NUTA NLA Aggregate Nutrient Ecoregion 2 5 41 LAKE_ORIGIN "Lake origin (MAN-MADE, NATURAL [which includes natural lakes augmented by dams])" 2 9 42 ECO3_X_ORIGIN WSA_ECO3 x LAKE_ORIGIN CLASS 2 20 43 REF_CLUSTER NLA Reference Site Cluster (A-G) 2 1 44 REFCLUS_NAME NLA Reference Cluster Description 2 100 45 RT_NLA "NLA Reference Class Assignment (REF=reference, SO-SO=intermediate, TRASH=impacted)" 2 8 46 REF_NUTR Nutrient Least Disturbed Reference Site (Y/N) 2 1 47 AREA_HA Lake polygon area (hectares) from NHD 1 48 SIZE_CLASS Lake area size class 2 20 49 LAKEAREA Lake polygon area (km^2) from NHD 1 50 LAKEPERIM Lake polygon perimeter (km) from NHD 1 51 SLD Shoreline development index (=LAKEPERIM/(2*sqrt(LAKEAREA*pi)) 1 52 DEPTH_X Lake Depth (m) at Index Site 1 53 DEPTHMAX Maximum Observed Lake Depth (m) 1 54 ELEV_PT Site elevation (meters) from the National Elevation Dataset 1 55 HUC_2 Hydrologic region (2-digit) 2 2 56 HUC_8 Hydrologic region (8-digit) 2 8 57 REACHCODE Unique NHD 14-digit Reach Code (0=code not assigned in NHDPlus 2 14 58 COM_ID Unique NHD 10-digit common identifier code (0=code not assigned in NHDPlus) 2 10 59 INDEX_SAMP Confirmation that lake was sampled. Secchi_Samp-Secchi depth determined 2 11 60 STATUS_VER Lake evaluation status from lake verification form. Used with other information to construct LAKE_SAMP 2 17 61 STATUS_FLD Lake evaluation status from lake evaluation field form. Used with other information to construct LAKE_SAMP 2 14 62 STATUS_DSK Lake evaluation status from lake evaluation desktop form.Used with other information to construct LAKE_SAMP 2 14 63 PERM_WATER Lake is a permanent waterbody (YES). Derived from Lake evaluation desktop and field forms. Used with other information to construct LAKE_SAMP 2 7 64 NON_SALINE Lake is non-saline waterbody (YES). Derived from Lake evaluation desktop and field forms. Used with other information to construct LAKE_SAMP 2 7 65 SRFC_AREA Lake is > 4 ha (YES). Derived from Lake evaluation desktop and field forms. Used with other information to construct LAKE_SAMP. 2 7 66 METER_DEEP Lake is > 1 m deep (YES). Derived from Lake evaluation desktop and field forms. Used with other information to construct LAKE_SAMP 2 7 67 OPEN_WATER Lake has > 1000 m2 of open water (YES). Derived from Lake evaluation desktop and field forms. Used with other information to construct LAKE_SAMP 2 7 68 AQUACULTUR Lake is a a private aquaculture waterbody (YES). Derived from Lake evaluation desktop and field forms. Used with other information to construct LAKE_SAMP 2 7 69 DISPOSAL "Lake is used for disposal (tailings, mine-tailings, etc.) (YES). Derived from Lake evaluation desktop and field forms. Used with other information to construct LAKE_SAMP" 2 7 70 SEWAGE Lake is sewage treatment pond (YES). Derived from Lake evaluation desktop and field forms. Used with other information to to construct LAKE_SAMP 2 7 71 EVAPORATE Lake is used for evaporation (YES). Derived from Lake evaluation desktop and field forms. Used with other information to construct LAKE_SAMP 2 7 72 PHYS_ACCES Lake is physically accessible for crew and boats (YES). Derived from Lake evaluation desktop and field forms. Used with other information to construct LAKE_SAMP 2 7 73 FLAG_INFO Data qualifier flag for lake info data 2 12 74 COMMENT_INFO Comments and flag explanations for lake info data 2 160 75 SAMPLED_PROFILE SAMPLED variable from profile data 2 25 76 SAMPLED_SECCHI Secchi Depth Site Sample Status 2 24 77 SAMPLED_ASSESS Site Sample Status - Assessment Form 2 15 78 SAMPLED_PHAB Site sampled code for physical habitat characterization 2 11 79 INDXSAMP_PHAB Index sample for physical habitat (YES/NO)? 2 20 80 SAMPLED_CHEM Index chemistry sample for site (YES/NO)-typically the Visit 1 Primary sample 2 20 81 INDXSAMP_CHEM Index chhemistry sample for site (YES/NO)-typically the Visit 1 Primary sample 2 3 82 SAMPLED_CHLA CHLA SAMPLE COLLECTED/ANALYZED? 2 20 83 INDXSAMP_CHLA Index chlorophyll sample for site (YES/NO)-typically the Visit 1 Primary sample 2 3 84 SAMPLED_ZOOP Zooplankton sample collected? 2 24 85 INDXSAMP_ZOOP Index zooplankton sample for site (YES/NO)-typically the VIsit 1 Primary sample 2 3 86 SAMPLED_PHYT Phytoplankton sample collected? 2 16 87 INDXSAMP_PHYT Index phytoplankton sample for site (YES/NO)-typically the Visit 1 Primary sample 2 3 88 SAMPLED_CORE Sediment core sample collected? 2 20 89 INDXSAMP_CORE Index sediment core sample for site (YES/NO)-typically the Visit 1 Primary sample 2 3 90 SAMPLED_INF "Sediment core samples (Top, Bottom) used for diatom-inferred chemistry?" 2 20 91 INDXSAMP_INF Index sample for site (YES/NO); typically visit 1) 2 3 92 SAMPLED_ENTE Enterococci sample collected? 2 20 93 INDXSAMP_ENTE Index enterococci sample for site (YES/NO)-typically the Visit 1 Primary sample 2 3 94 SAMPLED_MICR Microcystin sample collected? 2 16 95 INDXSAMP_MICR Index microcystin sample for site (YES/NO)-typically the Visit 1 Primary sample 2 3 96 SAMPLED_SDHG Sediment Hg sample collected? 2 20 97 INDXSAMP_SDHG Index sediment Hg sample for site (YES/NO)-typically the Visit 1 Primary sample 2 3 98 VISIT_ID Number assigned to each visit 1 99 FID_1 GIS record number for site-visit combination 1