"COLUMN_NAME"	"SAMPLE_TYPE"	"LABEL"	"LEGAL_VALUES"
"AG_ECO3"	"DESIGN"	"NARS 3-level reporting region (2015), based on aggregating AGGR_ECO9_2015 reporting regions"	"EHIGH|PLNLOW|WMTNS"
"AG_ECO3"	"DESIGN"	"NARS 3-level reporting region (2015), based on aggregating AG_ECO9 reporting regions.   No missing or \"blank\" values allowed."	"EHIGH|PLNLOW|WMTNS |"
"AG_ECO3_NM"	"DESIGN"	"NARS 3-level reporting region Name"	"Text names"
"AG_ECO3_NM"	"DESIGN"	"NARS 3-level reporting region name.  No missing or \"blank\" values allowed."	"Eastern Highlands | Plains and Lowlands | West |"
"AG_ECO9"	"DESIGN"	"NARS 9-level reporting region (2015), based on aggregated Omernik Level III ecoregions"	"CPL|NAP|NPL|SAP|SPL|TPL|UMW|WMT|XER"
"AG_ECO9"	"DESIGN"	"NARS 9-level reporting region, based on aggregated Omernik Level III ecoregions.  No missing or \"blank\" values allowed."	"CPL|NAP|NPL|SAP|SPL|TPL|UMW|WMT|XER |"
"AG_ECO9_NM"	"DESIGN"	"NARS 9-level reporting region Name"	"Text names"
"AG_ECO9_NM"	"DESIGN"	"NARS 9-level reporting region name.  No missing or \"blank\" values allowed."	"Coastal Plains | Northern Appalachians | Northern Plains | Southern Appalachians | Southern Plains | Temperate Plains | Upper Midwest | Western Mountains | Xeric |"
"BORD_RIV"	"DESIGN"	"Reach occurs on state or country boundaries"	"Text of two postal codes: MM:NN where MM is one state and NN is other state the river is on the border. Blank if not a border river"
"BORD_RIV"	"DESIGN"	"State border river code.  For a border river, value is two postal codes: MM:NN, where MM is one state code and NN is other state code.  If not a border river, then value is \"Not_Border\".  No missing  or \"blank\" values allowed."	
"CNTYNAME"	"DESIGN"	"County name (source ESRI counties based on census 2010)"	"Text Names"
"CNTYNAME"	"DESIGN"	"County name (source ESRI counties based on census 2010).   No missing or \"blank\" values allowed."	
"COMID"	"DESIGN"	"NHD common identifier for NRSA sampling frame and subsequent designs."	"Numeric"
"COMID"	"DESIGN"	"NHDPlusV2 common identifier for NRSA sampling frame.  No missing values allowed but it is possible that a few lakes may not be in sample frame if from a state study or are hand-picked lakes.  In this case value is \"0\". No missing values allowed.  COMID used for NRSA0809 through NRSA18-19; No longer used in NRSA23-24 and NHDPlusHR."	
"DATE_COL"	"VERIF"	"Date of data collection in field"	
"DES_FTYPE"	"DESIGN"	"Design FTYPE created from FTYPE and other NHD-Plus features"	
"DES_FTYPE"	"DESIGN"	"NRSA design feature type (based on NHD feature type).   Generally,  no missing values allowed but it is possible that a few lakes may not be in sample frame if from a state study or are hand-picked lakes.  In this case value is \"None\". No missing or \"blank\" values allowed."	
"DSGN_CYCLE"	"DESIGN"		"2000-04| 2008-09|2013-14|2018-19|"
"ELEVATION"	"ASSESS"	"Elevation at Transect K"	
"ELEVATION"	"DESIGN"	"Elevation at Stream site  (LAT_DD83, LON_DD83) from USGS elevation point query service (30 m elevation) http://ned.usgs.gov/epqs/"	"Numeric; may legitimately be negative"
"ELEVATION"	"DESIGN"	"Elevation at Stream site  (LAT_DD83, LON_DD83) from USGS elevation point query service (30 m elevation) http://ned.usgs.gov/epqs/.  May legitimately be negative.  No missing or \"blank\" values allowed.  Unit: meters"	
"ELEVATION"	"VERIF"	"Elevation at Transect A"	
"EPA_REG"	"DESIGN"	"EPA Region"	"Region_1 |  Region_2 | Region_3 | Region_4 | Region_5 | Region_6 | Region_7 | Region_8 | Region_9 | Region_10"
"EPA_REG"	"DESIGN"	"EPA Region.   No missing or \"blank\" values allowed."	"Region_01 | Region_02 | Region_03 | Region_04 | Region_05 | Region_06 | Region_07 | Region_08 | Region_09 | Region_10 |"
"EVAL_CAT"	"DESIGN"	"NRSA site evaluation result. For hand-picked sites evaluation is Target_Sampled.   No missing or \"blank\" values allowed."	
"FCODE"	"DESIGN"	"NHD feature type code"	
"FCODE"	"DESIGN"	"NHD 5-digit code for feature type.   Generally,  no missing values allowed but it is possible that a few lakes may not be in sample frame if from a state study or are hand-picked lakes.  In this case value is \"0\". No missing or \"blank\" values allowed."	
"FED_NONFED"	"DESIGN"	"Federal or Non-Federal land, based on OWN_NARS. OWN_NARS in FWS, Other Fed, USFS, NPS, NOAA, BLM, DOD, BOR considered Federal and all others Non-Federal."	"Federal|Non-Federal"
"FEOW_ID"	"DESIGN"	"Freshwater Ecoregions of the World (2015) code"	"Numeric"
"FEOW_ID"	"DESIGN"	"Freshwater Ecoregions of the World (2015) code.   No missing or \"blank\" values allowed."	
"FRAME08"	"DESIGN"	"Stream reach is included or excluded from sample frame for the NRSA 2008-09 Target Population survey design.  No missing or \"blank\" values allowed."	"Exclude|Include| Not Present |"
"FRAME13"	"DESIGN"	"Stream reach is included or excluded from sample frame for the NRSA 2013-14 Target Population survey design.  No missing or \"blank\" values allowed."	"Exclude|Include| Not Present |"
"FRAME18"	"DESIGN"	"Stream reach is included or excluded from sample frame for the NRSA 2018-19 Target Population survey design.  No missing or \"blank\" values allowed."	"Exclude|Include |"
"FRAMEEW"	"DESIGN"	"Stream reach is included or excluded from sample frame for the EMAP West 2000-3 Target Population survey design.  No missing or \"blank\" values allowed."	"Exclude|Include| Not Present |"
"FRAMEWS"	"DESIGN"	"Stream reach is included or excluded from sample frame for the WSA 2004 Target Population survey design.  No missing or \"blank\" values allowed."	"Exclude|Include| Not Present |"
"FS_EW"	"DESIGN"	"Eastern or western US Forest Service land"	"East | West | blank if not US Forest Service land"
"FS_EW"	"DESIGN"	"Eastern or western US Forest Service land. Not_USFS if not US Forest Service land.  No missing or \"blank\" values allowed."	"East | West | Not_USFS |"
"FTYPE"	"DESIGN"	"HD feature type name"	
"FTYPE"	"DESIGN"	"NHD feature type.  Generally,  no missing values allowed but it is possible that a few lakes may not be in sample frame if from a state study or are hand-picked lakes.  In this case value is \"None\". No missing or \"blank\" values allowed."	
"GNIS_ID"	"DESIGN"	"Goegraphic Names Information System ID (from NHD)"	"Numeric"
"GNIS_ID"	"DESIGN"	"Goegraphic Names Information System ID (from NHD). If value is \"0\", then no GNIS_ID available.  . No missing or \"blank\" values allowed."	
"GNIS_NAME"	"DESIGN"	"USGS Geographic Names Information System name"	"Text name"
"GNIS_NAME"	"DESIGN"	"USGS Geographic Names Information System name (from NHD).   Value of \"None\" if no GNIS_NAME available.  . No missing or \"blank\" values allowed."	
"GNIS_NAME"	"LAND"	"Name of the stream reach that the site was snapped to from the NHDPlusV21."	
"HUC2"	"DESIGN"	"USGS Level 2 Hydrologic Unit Code where stream reach is located (based on NHDPlusV2 use of HUCs)"	"Alphanumeric: H01 to H20 with H03N :H 03S : H03W | H10L : H10U  where region coded preceded by letter H"
"HUC2"	"DESIGN"	"USGS Level 2 Hydrologic Unit Code where stream reach is located (based on NHDPlusV2 use of HUCs).   No missing or \"blank\" values allowed."	"H01|H02|H03N|H03S|H03W|H04|H05|H06|H07|H08|H09|H10L|H10U|H11|H12|H13|H14|H15|H16|H17|H18|H19|H20"
"HUC2_NM"	"DESIGN"	"USGS Level 2 Hydrologic Unit Region Name where stream reach is located (based on NHDPlusV2 use of HUCs).  No missing or \"blank\" values allowed."	"Arkansas-Red-White Region |California Region |Great Basin Region |Great Lakes Region |Lower Colorado Region |Lower Mississippi Region |\"Lower Missouri Region |Mid-Atlantic Region |New England Region |Ohio Region |Pacific Northwest Region |Rio Grande Region |Souris-Red-Rainy Region |South Atlantic-North Region |South Atlantic-South Region |South Atlantic-West Region |Tennessee Region |Texas Region |Upper Colorado Region |Upper Mississippi Region |Upper Missouri Region |"
"HUC8"	"DESIGN"	"USGS Level 8 Hydrologic Unit Code where stream reach is located (based on NHDPlusV2 use of HUCs)"	"Alphanumeric code; 8-digit preceded by letter H"
"HUC8"	"DESIGN"	"USGS Level 8 Hydrologic Unit Code where stream reach is located (based on NHDPlusV2 use of HUCs).  Eight-digit preceded by letter H. No missing or \"blank\" values allowed."	
"HUC8_NM"	"DESIGN"	"USGS Level 8 Hydrologic  Cataloging Unit Name where stream reach is located"	"Text"
"HUC8_NM"	"DESIGN"	"USGS Level 8 Hydrologic  Cataloging Unit Name where stream reach is located.  No missing or \"blank\" values allowed."	
"LAT_DD83"	"DESIGN"	"Latitude (based on NAD83 datum) for stream site  from NHD-based sample frame."	"Numeric"
"LAT_DD83"	"DESIGN"	"Latitude in decimal degrees (based on NAD83 datum) for stream site  from NHDPlusV2, i.e., \"design latitude.\".   No missing or \"blank\" values allowed."	
"LAT_DD83"	"LANDSCAPE"	"Latitude in decimal degrees NAD83"	
"LON_DD83"	"DESIGN"	"Longitude (based on NAD83 datum) for stream site  from NHD-based sample frame."	"Numeric"
"LON_DD83"	"DESIGN"	"Longitude in decimal degrees (based on NAD83 datum) for stream site  from NHDPlusV2, i.e., \"design longitude.\"   No missing or \"blank\" values allowed."	
"LON_DD83"	"LANDSCAPE"	"Longitude in decimal degrees NAD83"	
"MAJ_BAS_NM"	"DESIGN"	"Major USGS Hydrologic Basins derived from NHDPlus Names"	"Text of 16 basin names"
"MAJ_BAS_NM"	"DESIGN"	"Name of major USGS Hydrologic Basins derived from NHDPlus names.  No missing or \"blank\" values allowed."	"Arkansas-White-Red Region | California Region |  Great Basin Region | Great Lakes Region | Lower Colorado Region | Lower Mississippi Region | Mid Atlantic Region | Missouri Region | New England Region | Ohio-Tennessee Region | Pacific Northwest Region | Rio Grande-Texas-Gulf Region | Souris-Red-Rainy Region | South Atlantic Gulf Region | Upper Colorado Region | Upper Mississippi Region |"
"MAJ_BASIN"	"DESIGN"	"Major USGS Hydrologic Basins derived from NHDPlus Codes"	"16 Major Basin Codes from 01 to 18 with 05_06 and 12_13 combined preceeded by letter H"
"MAJ_BASIN"	"DESIGN"	"Major USGS Hydrologic Basins code derived from NHDPlus codes. Has leading \"H\" to preserve leading zeros.  No missing or \"blank\" values allowed."	"H01|H02|H03|H04|H05_06|H07|H08|H09|H10|H11|H12_13|H14|H15|H16|H17|H18"
"MAJ_RIV_NM"	"DESIGN"	"Name of major or additional river"	
"MAJ_RIV_NM"	"DESIGN"	"Name of Major River in US (based on major and additional rivers defined in Benke's Rivers of North America).  Includes entire river to its headwaters. \"Not Major River\" if not a major river.  No missing or \"blank\" values allowed."	
"MAJ_RIVER"	"DESIGN"	"Identifies river as major or additional river based on Rivers of North America"	
"MAJ_RIVER"	"DESIGN"	"Designates major rivers in US (based on major rivers defined in Benke's Rivers of North America).  Benke identifies \"major rivers\" and \"additional rivers.\"    Includes entire river to its headwaters. \"NotMajorRiver\" if not a major river.  No missing values allowed."	"MajorRiver | Additional | NotMajorRiver"
"MIS_BAS_NM"	"DESIGN"	"The hydrologic basin name for streams in the Mississippi Basin derived from NHDPlus names.  \"Not Miss River Basin\" for streams not in the Mississippi Basin.  No missing values allowed."	"Ohio Region|Tennessee Region|Upper Mississippi Region|Lower Mississippi Region|Lower Missouri Region| Upper Missouri Region|Arkansas-Red-White Region|Not Mississippi River Basin"
"MIS_BASIN"	"DESIGN"	"The hydrologic basin code for streams in the Mississippi Basin derived from NHDPlus codes. For streams not in the Mississippi Basin value equal to \"NMRB\".  No missing values allowed."	"H05|H06|H07|H08|H10L|H10U|H11|NMRB"
"MISS_BASIN"	"DESIGN"	"The hydrologic basin name for streams in the Mississippi Basin, or NA for streams not in the Mississippi Basin"	"Text of 7 basin names or NA"
"MISS_BASIN"	"DESIGN"	"Within Mississippi Basin or outside, based on MIS_BAS_NM values"	"Mississippi_Basin|Not_Mississippi_Basin"
"NA_L1CODE"	"DESIGN"	"CEC North American Level I ecoregion code"	"Numeric 5 to 15 excluding 14 and 0 designating HI"
"NA_L1CODE"	"DESIGN"	"CEC North American Level I ecoregion code.  Values of 5 to 15 excluding 14 and 0 designating HI. No missing or \"blank\" values allowed."	
"NA_L1NAME"	"DESIGN"	"CEC North American Level I ecoregion name"	"Text"
"NA_L1NAME"	"DESIGN"	"CEC North American Level I ecoregion name.  No missing or \"blank\" values allowed."	"EASTERN TEMPERATE FORESTS | GREAT PLAINS | MARINE WEST COAST FOREST | MEDITERRANEAN CALIFORNIA | NORTH AMERICAN DESERTS | NORTHERN FORESTS | NORTHWESTERN FORESTED MOUNTAINS | SOUTHERN SEMI-ARID HIGHLANDS | TEMPERATE SIERRAS | TROPICAL WET FORESTS |"
"NA_L2CODE"	"DESIGN"	"CEC North American Level II ecoregion code"	"Alphanumeric: n.n where leading position is Level I code and following position is Level 2 designation"
"NA_L2CODE"	"DESIGN"	"CEC North American Level II ecoregion code.  Form is  n.n where leading is L1 and following is level 2.  No missing or \"blank\" values allowed."	
"NA_L2NAME"	"DESIGN"	"CEC North American Level II ecoregion name"	"Text"
"NA_L2NAME"	"DESIGN"	"CEC North American Level II ecoregion name.  No missing or \"blank\" values allowed."	
"NARS_NAME"	"DESIGN"	"Name of lake from field evaluation or GNIS NAME if the same"	"Text"
"NARS_NAME"	"DESIGN"	"Name of stream from field evaluation or GNIS NAME if the same. \"None\" if no name.  No missing or \"blank\" values allowed."	
"OWN_NARS"	"DESIGN"	"Land ownership code derived from USGS PADUS (http://gapanalysis.usgs.gov/padus/data/) - pulled May 2016 version of database. Aggregated to categories used by NARS.  Text of 13 land ownership category names. Similar to OWN_TYPE  in USGS PADUS dataset except that Federal_Land is separated into major federal agencies.   No missing or \"blank\" values allowed."	"BLM |  DOD | | DOE | USFS | FWS | NOAA | Non Federal | NPS | Tribal Land| USACE | USBR | NRCS| Other Fed"
"PANEL_RVST"	"DESIGN"	"Survey of time panels that identifies which sites were visited in which design cycle.  Form is SSS_Y1_Y2_Y3_etc where SSS is abbreviation for the STUDY (NRS) and Yi identifies year visited which is \"NO\" if no visit in that design cyle. For HAND sites, panel value is \"NONE\". No missing or \"blank\" values allowed."	
"PANEL_SOT"	"DESIGN"	"Survey over time sets of sites for only probability sites.   As new design cycles are added for NRSA, PANEL_SOT values must be updated.  Form is NRS_XX_XX_XX_etc.  Where XX equal  design cycle year  or NO if not evaluated and position designates the 1st, 2nd, and 3rd design cycles.  Note that all possible combinates for PANEL_RVST may not be present for PANEL_SOT.  For hand-picked sites, value is HAND. No missing or \"blank\" values allowed."	"NRS_08_NO | NRS_08_13 | NRS_NO_13 | HAND"
"PANEL_USE"	"DESIGN"	"NRSA Panel Assignment. Text that has form NRSnn_mmXXXn_YYYY, where nn is current cycle year (09, 14, 19, etc), mm is cycle year stream site was first selected for sampling, XXXn denotes revisit status, and YYYY denotes base or over sample status.  XXXn equals either RVT2 (if site should be visited twice in current cycle year) or RVT (if site should be visited once in current cycle and was previously visited in a prior cycle year) and is blank otherwise.  YYYY  is either blank (if the stream site is a base site) or equals OverSamp (if the stream site is an over sample site).  Note: For state specific designs, state two letter code is added.  Hand-picked sites have value \"NONE\". No missing or \"blank\" values allowed."	
"PANEL_WGT"	"DESIGN"	"Sets of probability sites required for the weight adjustment for each design cycle.  PANEL_WGT is not changed when future design cycles are completed. Hand-picked sites assigned as NONE, since they are not a probability site.    No missing or \"blank\" values allowed.."	
"PROB_CAT"	"DESIGN"	"NRSA unequal probability categories used within a stratum. Hand-picked sites equal to \"None\"  as they are not a site from probability design.  No missing values allowed"	
"PSTL_CODE"	"DESIGN"	"State two-letter postal code"	
"PSTL_CODE"	"DESIGN"	"State two letter postal code for site sampled. 50 state postal codes plus AS, MP, GU, PR, VI for American Samoa, Commonwealth of Northern Marianas, Guam, Puerto Rico and Virgin Islands.  No missing or \"blank\" values allowed."	
"RCHDOWN"	"VERIF"	"Downstream Length (m)"	
"RCHUP"	"VERIF"	"Upstream Length (m)"	
"REACHCODE"	"DESIGN"	"NHD Reach code assigned"	"Numeric"
"REACHCODE"	"DESIGN"	"NHD Reach code assigned. Value of 'None' if site is on reach that is not in NHD. No missing values or \"blanks\" allowed."	"Reachcode value preceeded by 'R' (values have leading zeros)"
"SF_ST_ID"	"DESIGN"	"Stream ID from a State sample frame .  \"None\" if not in state sample frame..  No missing  or \"blank\" values allowed."	
"SITE_ID"	"DESIGN"	"Site ID for the study and year sampled.  Preferred form is NRSnn_MM-xxxxx  where  nn is current cycle year (04, 08, 13, 18, etc), MM is two letter state code, and xxxxx is between 10001 and 99999.  No missing or \"blank\" values allowed."	
"SITE_ID"	"LANDSCAPE"	"Unique Site ID assigned for NRSA13-14"	
"SITE_ID"	"VERIF"	"Site ID"	
"SITETYPE"	"DESIGN"	"Site type (Probability-based or hand-picked)"	"PROB | HAND"
"SITETYPE"	"DESIGN"	"Site type (Probability-based or hand-picked).  PROB for sites from probability survey.  Usually HAND for hand-picked sites.  In EMAP West and WSA, STARHAND is used to identify hand-picked sites that do not have all CORE indicators available . No missing or \"blank\" values allowed."	"PROB | HAND | STARHAND |"
"SOURCE"	"DESIGN"	"Sample frame source"	"NHDPlusv2| State frame names"
"SOURCE"	"DESIGN"	"Sample frame source for PROB sites and NONE for HAND sites.  State frame names if used .  No missing or \"blank\" values allowed."	"RF3 |  NHDPlusV1| NHDPlusV2 | NONE"
"STATE_NM"	"DESIGN"	"State to which stream reach is assigned for sampling in NRSA.   No missing or \"blank\" values allowed."	
"STATE_SF"	"DESIGN"	"Include or exclude stream reach in state sample frame.  No missing or \"blank\" values allowed."	"Include | Exclude |"
"STATECTY"	"DESIGN"	"FIPS state and county code"	"Text - numeric with leading zero"
"STATECTY"	"DESIGN"	"FIPS state and county code. Text with leading \"F\" before code.  No missing or \"blank\" values allowed."	
"STRAH_CAL"	"DESIGN"	"Strahler calculator from NHDPlusv2.  Used to identify braided reaches."	"Numeric: 0 to 10."
"STRAH_CAL"	"DESIGN"	"Strahler calculator from NHDPlusv2.  Used to identify braided reaches. Values of 0 to 10. No missing or \"blank\" values allowed."	
"STRAH_CAT"	"DESIGN"	"Strahler category used to classify reaches.  RiversMajor (5th and higher)  RiversOther (5th and higher) LargeStreams (3rd and 4th)  SmallStreams (1st and 2nd)"	"RiversMajor | RiversOther | LargeStreams | SmallStreams"
"STRAH_CAT"	"DESIGN"	"Strahler category used to classify reaches.  SmallStreams � 1st and 2nd order; LargeStreams � 3rd and 4th order; MajorRivers � 5th order and higher that are identified as MajorRiver/Additional in MAJ_RIVER variable;  and OtherRivers � 5th and higher that are not MajorRivers.  No missing or \"blank\" values allowed."	"RiversMajor | RiversOther | LargeStreams | SmallStreams |"
"STRAH_ORD"	"DESIGN"	"Strahler order from NHDPlusv2"	"Numeric: 0 to 10."
"STRAH_ORD"	"DESIGN"	"Strahler order from NHDPlusv2. Values from 0 to 10. No missing or \"blank\" values allowed."	
"STRATUM"	"DESIGN"	"Stratum use for survey design (national assessment). Needed for population estimates. For value definitions, see survey-specific design documentation."	
"STRATUM"	"DESIGN"	"Strata used in the NRSA survey design.  . Hand-picked sites assigned value of \"None\".   No missing or \"blank\" values alllowed."	
"TNT_CAT"	"DESIGN"	"NRSA target status assigned based on stream site evaluation. For population estimation must combine with SITETYPE to restrict to probability survey sites.  No missing or \"blank\" values allowed."	"Target | Target_Presumed |Uncertain | Non_Target | Not_Needed |"
"URBN_NRS08"	"DESIGN"	"Stream  identified as an urban stream based on urban definition used in NRSA 2008-9 design.  Urban based on 2000 Census polygons of urban areas and 3km buffer to ensure census waters included.  No missing or \"blank\" values allowed."	"Urban | Non-Urban |"
"URBN_NRS18"	"DESIGN"	"Stream  identified as an urban stream based on urban definition used in NRSA 2018-19 design. Urban based on 2010 Census polygons of urban areas. No 3km buffer to ensure census waters included since census polygons now include census waters.  No missing or \"blank\" values allowed."	"Urban | Non-Urban |"
"US_L3CODE"	"DESIGN"	"Omernik Level III ecoregion code"	"Numeric 1 to 85"
"US_L3CODE"	"DESIGN"	"Omernik Level III ecoregion code. Coded as \"0\" if ecoregions have not been defined for state or territory. No missing or \"blank\" values allowed."	
"US_L3NAME"	"DESIGN"	"Omernik Level III ecoregion name"	"Text name"
"US_L3NAME"	"DESIGN"	"Omernik Level III ecoregion name. \"None\" if no ecoregion defined for state or territory.  No missing or \"blank\" values allowed."	
"US_L4CODE"	"DESIGN"	"Omernik Level IV ecoregion code"	"Level three codes plus aphabetic ending identifying level 4 subregion"
"US_L4CODE"	"DESIGN"	"Omernik Level IV ecoregion code.  Level three codes plus aphabetic ending identifying level 4 subregion. \"None\" if no ecoregion defined for state or territory.  No missing or \"blank\" values allowed."	
"US_L4NAME"	"DESIGN"	"Omernik Level IV ecoregion name"	"Text name"
"US_L4NAME"	"DESIGN"	"Omernik Level IV ecoregion name.  \"None\" if no ecoregion defined for state or territory.   No missing or \"blank\" values allowed."	
"USFS"	"DESIGN"	"US Forest Service land or other, based on OWN_NARS."	"Forest_Service|Not_Forest_Service"
"VISIT_NO"	"VERIF"	"Number identifying which visit this is"	"|1|2"
"WGT_CAT"	"DESIGN"	"NRSA categories used to adjust weights for site. Hand-picked sites assigned value of \"NONE\".  No missing or \"blank\" values allowed."	
"WGT_DSGN"	"DESIGN"	"NRSA initial site weight assigned during site selection. >0 or 0 if site is not to be used for population estimation. DO NOT USE FOR POPULATION ESTIMATION!"	
"WGT_TP_CORE"	"DESIGN"	"NRSA adjusted weight for site for population estimates of target population based on sampled probability sites. Weight units are stream miles. Value is 0 if site is not to be used for estimates."	
"WGT_TP_EXTENT"	"DESIGN"	"NRSA adjusted weight for site for extent estimates of target population based on all probability sites evaluated. Weight units are stream miles. Value is 0 if site is not to be used for estimates."	
"XCOORD"	"DESIGN"	"x-coordinate from US Contiguous Albers Equal Area Conic projection EXCEPT Hawaii sites which are calculated from Hawaii Albers Equal Area Conic projection"	"Numeric"
"XCOORD"	"DESIGN"	"x-coordinate from US Contiguous Albers Equal Area Conic projection EXCEPT Hawaii sites which are calculated from Hawaii Albers Equal Area Conic projection.   No missing or \"blank\" values allowed. Projection:  clon = -96, clat = 37.5, sp1 = 29.5, sp2 = 45.5"	
"YCOORD"	"DESIGN"	"y-coordinate from US Contiguous Albers Equal Area Conic projection EXCEPT Hawaii sites which are calculated from Hawaii Albers Equal Area Conic projection"	"Numeric"
"YCOORD"	"DESIGN"	"y-coordinate from US Contiguous Albers Equal Area Conic projection EXCEPT Hawaii sites which are calculated from Hawaii Albers Equal Area Conic projection.  No missing or \"blank\" values allowed.  Projection: sph = \"GRS80\", clon = -96, clat = 37.5, sp1 = 29.5, sp2 = 45.5"	
"YEAR"	"VERIF"	"Year of sampling"	
"UID"		"Unique site visit ID"	
"PUBLICATION_DATE"		"Date of data file publication"	
"DSGN_CYCLE"		"NRSA survey design time period 2000-04| 2008-09 | 2013-14 | 2018-19 | etc.  No missing values allowed."	
"SITETYPE"		"Site type (Probability-based or hand-picked).  PROB for sites from probability survey.  Usually HAND for hand-picked sites.  In EMAP West and WSA, STARHAND is used to identify hand-picked sites that do not have all CORE indicators available."	
"UNIQUE_ID"		"Unique site ID based on location that does not depend on year sampled or any other factor. Form is NRS_ss_nnnnn  where ss state and nnnnn is number that starts at 10001. No missing values allowed."