Naomi Nakagaki, Nancy T. Baker, and Alice Zhou 2012 Version 1.0, August 24, 2011 vector digital data Reston, Viriginia U.S. Geological Survey https://water.usgs.gov/lookup/getspatial?ds655_basins Martin, J.D.; Eberle, Michael; Nakagaki, Naomi 2011 1.0 document U.S. Geological Survey Data Series 655 Reston, Viriginia U.S. Geological Survey https://pubs.usgs.gov/ds/655 This dataset consists of drainage basin boundaries for 212 U.S. Geological Survey (USGS) stream sites sampled in the National Water-Quality Assessment (NAWQA) Program, the National Stream Quality Accounting Network (NASQAN), and the National Monitoring Network (NMN). Of the 212 sites, 206 have either a contributing or total drainage basin boundary, and the remaining 6 have both a total drainage basin boundary and a smaller contributing basin boundary. Collectively, these 218 basin boundaries have been used in a geographic information system (GIS) to generate basin characteristics for the assessment of trends in concentrations of pesticides streams of the United States. The drainage basin boundaries provide context for site characterization used to assess trends in concentrations of pesticides in streams. These boundaries are overlain with a variety of national thematic map layers to create consistent watershed characteristics to support studies for the NAWQA Program. CONTENTS OF THE DATA: The compressed file, ds655_basins.zip, contains a folder named "shps", which consists of the 218 basin boundaries in shapefile format, a folder named "DOCUMENTATION" that contains the individual basin metadata files, and a tab-delimited tabular file, "ds655basin_attributes.txt", which stores the names of the 218 basin shapefiles and the attributes that are also stored in the shapefile attribute tables. BACKGROUND INFORMATION: The dataset consists of 218 basin boundaries that have been used to support studies of the trends of pesticide concentrations in streams as well as other water-quality studies for the NAWQA program. The drainage basins range in size from less than 1 square kilometer to nearly 3,000,000 square kilometers, with an average of approximately 75,000 square kilometers. About 70 percent of the basin boundaries were developed from vector sources at the scale of 1:24,000 or raster sources with a resolution of 30 meters. Nearly 80 percent of the basin boundaries were collected from USGS hydrologists and geographers in over 50 NAWQA study units from 1995 through 2011. A number of the basin boundaries in this dataset have been published, specifically: 121 basins from "Drainage basins used for development of the WAtershed Regressions for Pesticides (WARP) model", (Nakagaki, 2010), 35 basins from the "National Stream Quality Accounting Network and National Monitoring Network Basin Boundary Geospatial Dataset, 2008-13" (Baker, 2011), and 13 basins from the "Watersheds for U.S. Geological Survey National Stream Quality Accounting Network (NASQAN) sampling sites 1996-2000" (U.S. Geological Survey, 2004). Selected basin characteristics derived from this basin dataset are published in appendix 3 of Martin and others (2011). Previously published characteristics for assessing pesticide trends (Martin, 2009) were derived using an earlier version of these basin boundaries. -BACKGROUND INFORMATION REFERENCES: Baker, N.T., 2011, National Stream Quality Accounting Network and National Monitoring Network Basin Boundary Geospatial Dataset, 2008-13: U.S. Geological Survey Data Series 641, 16 p., accessed December 7, 2011, at https://pubs.usgs.gov/ds/641/ Martin, J.D., 2009, Sources and preparation of data for assessing trends in concentrations of pesticides in streams of the United States, 1992-2006: U.S. Geological Survey Scientific Investigations Report 2009-5062, 41 p., accessed December 6, 2011, at https://pubs.usgs.gov/sir/2009/5062/ Martin, J.D.; Eberle, Michael; and Nakagaki, Naomi, 2011, Sources and preparation of data for assessing trends in concentrations of pesticides in streams of the United States, 1992-2010: U.S. Geological Survey Data Series 655, 23 p., 5 app., accessed December 6, 2011 at https://pubs.usgs.gov/ds/655/ Nakagaki, N., 2010, Drainage basins used for development of the watershed regressions for pesticides (WARP) model, accessed June 4, 2010 https://water.usgs.gov/lookup/getspatial?warpbas2010 U.S. Geological Survey, 2004, Watersheds for U.S. Geological Survey National Stream Quality Accounting Network (NASQAN) sampling sites 1996-2000, edition 1.0, accessed December 7, 2011, at https://water.usgs.gov/lookup/getspatial?nasqan2k NAMING CONVENTIONS OF BASINS: Each drainage basin boundary is stored in a separate data layer in shapefile format. The naming convention for the shapefiles if "b" concatenated with the USGS station-identification (STAID) number. For 206 of the 212 sites, there is one basin boundary per site, and for the remaining six sites, there are two basin boundaries. One represents the contributing drainage area, and the other represents the total drainage area and includes closed basins or noncontributing drainage areas that for example, only drain into the basin during storm events. The contributing drainage boundary and the total drainage boundary are named using "con" and "tot", respectively, concatenated with the STAID number. The STAID numbers and stations names (SIT_NAME) for the six basins that have delineations for both a contributing and total drainage are listed below: STAID SIT_NAME 06295000 Yellowstone River at Forsyth, MT 06329500 Yellowstone River near Sidney, MT 08364000 Rio Grande at El Paso, TX 11074000 Santa Ana River below Prado Dam, CA 11274538 Orestimba Creek at River Road near Crows Landing, CA 11303500 San Joaquin River near Vernalis, CA BASIN METADATA: The basin metadata files have the same naming convention as the drainage basins but end with the ".txt" extension. The basin documentation identifies the source and methods used to delineate the basin boundary as stated in the original metadata files supplied by NAWQA GIS specialists. Although the information in "Source_Information" and "Process_Steps" was preserved, other sections were modified to provide consistent information throughout the individual basin metadata files. For example, in the original documentation file, it was not uncommon to see "Currentness_Reference" (in "Time_Period_of_Content") populated with "Ground Condition" while others were populated with the year the source data (for example, topographic maps) were published. These entries were replaced with the prior publication date of the basin boundary, if applicable, or the approximate time period the dataset was created and last modified if known. Otherwise, the date of acquisition was entered. The criteria used to populate the "Time_Period_of_Content" elements is summarized below: 1. If the basin boundary has been published, the published date was entered for "Calendar_Date". 2. If the basin boundary has *not* been published, the year the dataset was created was entered for "Calendar_Date", if specified; if the basin was modified thereafter, both the year of creation and the last date of modification were entered, for"Beginning_Date" and "Ending_Date", respectively. 3. If conditions #1 and #2 were not applicable, the year the dataset was acquired was entered for "Calendar_Date". TYPE OF DRAINAGE AREAS: With the exception of the six sites that have both a contributing and total drainage basin boundary, the type of drainage represented by the basin boundary was inferred by comparing the drainage area derived from the mapped boundary to the values of total and contributing drainage area stored in the NAWQA Data Warehouse as of 09-16-2011 (Martin and others, 2011). **Note that though the source for site information extracted from Martin and others (2011) was the NAWQA Data Warehouse, the NAWQA Data Warehouse is an archived collection of USGS site-information data from the USGS National Water Information System (NWIS) database.** For the majority of the basins, the (NWIS) contributing and total drainage areas are identical, but for some basins, there are no values; for these basins, the drainage types could not be inferred. The (inferred) type of drainage area for each boundary is stored in the "BAS_TYPE" field in the basin's attribute table. DRAINAGE BASINS EXTENDING BEYOND THE U.S. BORDER: Twenty-five of the 218 watersheds extend beyond the U.S. border. The percentage of the basin within the U.S. is a field in the basin's attribute table. The station-identification number (STAID), percentage of the basin within the U.S.(PCTINUS), the total drainage area in square miles (BAS_SQMI), and station name (SIT_NAME) for these basins are listed below: STAID PCTINUS BAS_SQMI SIT_NAME 04264331 38.34 297,955 St. Lawrence River at Cornwall, Ontario, near Massena, NY 08377200 49.7 95,115 Rio Grande at Foster Ranch near Langtry, TX 12400520 49.74 60,373 Columbia River at Northport, WA 08374200 51.14 72,974 Rio Grande below Rio Conchos near Presidio, TX 12472900 58.92 96,333 Columbia River at Vernita Bridge near Priest Rapid Dam, WA 08461300 58.99 206,916 Rio Grande below Falcon Dam, TX 08475000 59.83 215,271 Rio Grande near Brownsville, TX 08459200 67.87 177,073 Rio Grande at Pipeline Crossing below Laredo, TX 08450900 69.96 167,199 Rio Grande below Amistad Dam near Del Rio, TX 14128910 83.28 236,623 Columbia River at Warrendale, OR 14246900 84.68 258,697 Columbia River at Beaver Army Terminal near Quincy, OR 06185500 88.53 92,569 Missouri River near Culbertson, MT 06338490 94.13 180,876 Missouri River at Garrison Dam, ND 05102490 94.64 35,555 Red River of the North at Pembina, ND 06467500 96.26 278,656 Missouri River at Yankton, SD 06610000 96.75 321,076 Missouri River at Omaha, NE 06934500 97.99 519,409 Missouri River at Hermann, MO 07022000 98.53 710,441 Mississippi River at Thebes, IL 01184000 98.81 9,672 Connecticut River at Thompsonville, CT 322023090544500 99.07 1,123,967 Mississippi River at mile 438 above Vicksburg, MS 07373420 99.09 1,144,886 Mississippi River near St. Francisville, LA 07374000 99.09 1,145,343 Mississippi River at Baton Rouge, LA 07374525 99.09 1,145,457 Mississippi River at Belle Chasse, LA 09522000 99.57 249,078 Colorado River at Northerly International Boundary above Morelos Dam, near Andrade, CA 08470400 99.99 345 Arroyo Colorado at Harlingen, TX SPECIAL-CASE DRAINAGE BASINS: There are several basins that have unique conditions that users should make note of prior to their use. They are listed below, and included in the "COMMENT" field in the basin's attribute table: --For two sites, the water-quality sampling took place downstream from the USGS gaging site. Consequently, watersheds for these sites are delineated from the actual sampling location rather than the USGS gaging site. Specifically, a) the basin boundary "b02175000.shp" corresponds to 11 km south of the USGS gaging site 02175000 (Edisto River near Givhans, SC), and, b) the basin boundary "b02469762.shp" corresponds to 2 km south of the USGS gaging site 02469762 (Tombigbee River below Coffeeville Lock & Dam near Coffeeville, AL). -- The watershed boundary for site 11273500 (Merced River at River Road Bridge near Newman, CA), consists of two isolated polygons due to artificial canals. The areas of each polygon were summed to determine the area of this watershed. Please note that the output of GIS functions may produce multiple records for this basin and require additional calculations to obtain the desired outcome. -- Water-quality and streamflow at some sites are highly influenced by the diversion of water into or out of the basin. Nine sites in this dataset are known to be highly influenced by diversions: STAID SIT_NAME 07373420 Mississippi River near St. Francisville, LA 07374000 Mississippi River at Baton Rouge, LA 07374525 Mississippi River at Belle Chasse, LA 07381495 Atchafalaya River at Melville, LA 07381590 Wax Lake Outlet at Calumet, LA 07381600 Atchafalaya River at Morgan City, LA 08470400 Arroyo Colorado at Harlingen, TX 08475000 Rio Grande near Brownsville, TX 09522000 Colorado River at N. International Boundary above Morelos Dam, AZ For the basins listed above, data users are strongly encouraged to review figures 2-4 and read the section "Consideration of Flow Routing for Selected Basins in the Data Set" in Baker, N.T., 2011, National Stream Quality Accounting Network and National Monitoring Network Basin Boundary Geospatial Dataset, 2008-13: U.S. Geological Survey Data Series Report DS-641, 16 p. (https://pubs.usgs.gov/ds/641). -- The drainage areas for five basins differ significantly from the drainage area published in USGS NWIS database. The GIS and NWIS drainage areas for these sites (in square miles, as of 4/16/12) are listed below, along with their percent differences: *-999 denotes the NWIS field is not populated GIS = basin area based on GIS basin NWIS-con = contributing basin area from NWIS NWIS-tot = total drainage basin area from NWIS Pct_diff = percent difference of GIS to NWIS-con, if populated; otherwise compared to NWIS-tot. Calculated by taking the natural log of GIS/NWIS, multiplied by 100 STAID GIS, NWIS-con, NWIS-tot, Pct_diff 08475000 215271, 176333, 176333, 20.0 05082625 254, -999, 311, -20.1 08461300 206917, 159270, 159270, 26.2 08459200 177073, 132578, 132578, 28.9 08450900 167199, 123143, 123143, 30.6 A description of these five basins is provided below. 08475000 (Rio Grande near Brownsville): The basin boundary for this site was extracted from Baker (2011), and the difference in area compared to NWIS is described in her documentation as follows: "The drainage area for this delineation of the Rio Grande River near Brownsville is 215,270 square miles with 177,415 square miles contributing area, 35,291 square miles noncontributing area, and 2,564 square miles for the Laguna Madre diversion basin. The drainage area published in U.S. Geological Survey NWIS records is 176,333 square miles. The value published in NWIS does not include the noncontributing area or the 2,564 square miles for the Laguna Madre basin. When these two factors are taken into account, the resulting comparable drainage area is 177,415 for this delineation or a 0.61 percent difference between the NWIS published area and the comparable drainage area for this version." 05082625 (Turtle River at Turtle River State Park near Arvilla, ND): The Turtle River basin boundary was verified by the USGS ND Water Science Center to be 254 square miles rather than 311 square miles reported in the USGS NWIS database (David L. Lorenz, U.S. Geological Survey, 2008). This basin boundary was also compared with subbasins from the Watershed Boundary Dataset and the observed differences were insignificant. 08461300 (Rio Grande River below Falcon Dam, TX), 08459200 (Rio Grande River at Pipeline Crossing below Laredo, TX), and 08450900 (Rio Grande River below Amistad Dam near Del Rio, TX): These three basin boundaries are located along the Rio Grande River and extend into Mexico. The boundaries were taken from the USGS publication of NASQAN watershed boundaries (2004). -SPECIAL-CASE DRAINAGE BASINS REFERENCES: Baker, N.T., 2011, National Stream Quality Accounting Network and National Monitoring Network Basin Boundary Geospatial Dataset, 200813: U.S. Geological Survey Data Series 641, 16 p., accessed December 7, 2011, at https://pubs.usgs.gov/ds/641/ U.S. Geological Survey, 2004, Watersheds for U.S. Geological Survey National Stream Quality Accounting Network (NASQAN) sampling sites 1996-2000, edition 1.0, accessed December 7, 2011, at https://water.usgs.gov/lookup/getspatial?nasqan2k BASIN ATTRIBUTES: The basin attribute table (.dbf file for each basin shapefile) contains 11 attributes: STAID: the station-identification number for the basin and site BAS_SQMI: drainage basin area, in square miles BAS_SQKM: drainage basin area, in square kilometers PCTINUS: percentage of basin within the U.S. BAS_TYPE: type of drainage basin BAS_SRC: scale or resolution of the source data BAS_PUB: published source, if applicable SIT_LAT83: latitude coordinate of site, in decimal degrees, horizontal datum NAD83 SIT_LON83: longitude coordinate of site, in decimal degrees, horizontal datum NAD83 SIT_NAME: name of corresponding sampling station COMMENT: comment on any special characteristic of the basin delineation The attribute tables for all the basins are appended into in a single table, "ds655basin_attributes.txt"(ASCII format). For more information regarding the attributes, see the "Entity_and_Attribute_Information" section. 1995 2011 The time period during which the drainage basin boundaries were collected. Complete Although this dataset is considered complete at this time, there may be future releases of basin boundaries due to added sites or enhanced drainage basin boundaries. -127.87 -65.35 48.24 22.87 USGS Thesaurus NAWQA National Water-Quality Assessment NASQAN National Stream Quality Accounting Network NMN National Monitoring Network pesticides water quality drainage basin river basin catchment basin boundary drainage area ISO 19115 Topic Category Geoscientific Information Inland Waters USGS Metadata Identifier USGS:2b6b9f6c-beba-49b0-aa57-8ec21c6cf3f6 Geographic Names Information System Conterminous United States None 1. See "SPECIAL-CASE DRAINAGE BASINS" discussion under the Supplemental_Information section of this metadata file. 2. Because these drainage basins were created by a number of people using different data sources and methods over a period of 16 years, boundaries of nested and adjacent basins are not entirely coincident. 3. Contact information in individual basin metadata files may reference a person no longer with the USGS. In these cases, it is advised to contact the state USGS representative for the Water Science Center office corresponding to the site. The contact information for the USGS Water Science Centers is available from http://www.usgs.gov/contact_us/. 4. Acknowledgment of the USGS would be appreciated. U.S. Geological Survey Naomi Nakagaki Geographer mailing and physical address

CSUS Placer Hall 6000 J Street

Sacramento CA 95819 USA (916) 278-3092 (916) 278-3071 nakagaki@usgs.gov https://water.usgs.gov/GIS/browse/ds655_basins.jpg Illustration of dataset JPEG The authors would like to thank the reviewers of this dataset, Laura Hayes and Jean A. Dupree, U.S. Geological Survey, for the many suggestions that have improved the clarity and content of the documentation files. Much appreciation also goes to the many USGS hydrologists and geographers who spent countless hours developing drainage basin boundaries that make up this dataset. The majority of the drainage basin boundaries were created prior to the availability of automated basin delineation tools. The names of these USGS hydrologists and geographers are listed below in alphabetical order: Terri L. Arnold, Nancy T. Baker, Kymm K. Barnes, Robert L. Baskin, William (Boyce) Blanks, John W. Brakebill, Carmen A. Burton, James E. Bubb, Gary R. Buell, Daniel T. Button, Jimmy M. Clark, Joseph F. Connell, Lance M. Cooper, Patricia D'Arconte, A.L. Derosier, Janet M. Denis, Ross G. Dickinson, Paul C. Dunne, Jean A. Dupree, Sarah M. Flanagan, Douglas A. Freehafer, JoAnn M. Gronberg, Alan L. Haggland, Paul E. Hanson, Laura L. Hallberg, Laura Hayes, John S. Harvill, Craig A. Harvey, Julian A. Heilman, Scott A. Hoffman, Evelyn H. Hopkins, Hank Johnson, Michaela R. Johnson, Tyler Y. Johnson, Craig M. Johnston, S.K. Kelley, Janet Kelley, Moon H. Kim, Donna L. Knifong, David L. Lorenz, Lori Mattern, Molly A. Maupin, David S. McCulloch, Gerard McMahon, Jim E. Monical, Rose L. Medina, Reavis L. Mitchell III, Matthew W. Moix, Mark R. Nardi, Daniel K. Pearson, John (Jack) Pflaumer, Steven F. Richey, Jennifer Lanning-Rush, David A. Saad, A. Alejandro Sepulveda, Tomas W. Smieszek, Steven Sobieszczyk, Peter A. Steeves, Verlin (Cory) Stephens, Jana S. Stewart, Silvia E. Terziotti, Thomas J. Trombley, Frank D. Voss, Michael E. Wieczorek, Daniel S. Yeatts, and Ronald B. Zelt. Martin, J.D.; Eberle, Michael; and Nakagaki, Naomi 2011 U.S. Geological Survey Data Series Report DS655 https://pubs.usgs.gov/ds/655 Martin, J.D. 2009 U.S. Geological Survey Scientific Investigations Report 2009-5062 https://pubs.usgs.gov/sir/2009/5062/ The attribute values were inspected and found to be consistently coded as described in the "Entity_and_Attribute_Information" section. Shared boundaries of adjacent or nested basins are not entirely consistent. Polygon and chain-node topology present and all polygons are closed. Complete Visual checks with background maps of hydrography, shaded relief, and in some cases, satellite imagery along with the U.S. Geological Survey sampling sites and basins were conducted to ensure watershed delineations are adequate. Basin delineations were also checked for accuracy with the USGS Watershed Boundary Dataset, which consists of basin delineations at the 1:24,000-scale. The accuracy for basin boundaries is variable because the boundaries were derived from several data sources with varying scales or resolutions. Refer to the individual basin metadata files for information on how basin delineations were generated. Basin boundaries were collected from many USGS GIS specialists and hydrologists. 1995 - 2011 The following attributes were added to the basin attribute tables: BAS_SQMI: drainage basin area, in square miles BAS_SQKM: drainage basin area, in square kilometers PCTINUS: percentage of basin within the U.S. BAS_TYPE: type of drainage basin BAS_SRC: scale or resolution of the source data BAS_PUB: published source, if applicable SIT_LAT83: latitude coordinate of site, in decimal degrees, NAD83 SIT_LON83: longitude coordinate of site, in decimal degrees, NAD83 SIT_NAME: name of corresponding sampling station COMMENT: comment on any special characteristic of the basin delineation 2011 To ensure consistency among the data structure of the 218 basin boundaries, minor edits have been made to the original geospatial data. These edits included the elimination of extra pseudo nodes and polygons or slivers contained within the outer boundary, as well as the horizontal datum transformation from NAD27 to NAD83 where necessary. 2011 Albers Conical Equal Area 29.5 45.5 -96 23 0.00000 0.00000 coordinate pair 10.00004482269 10.00004482269 Meters North American Datum of 1983 GRS1980 6378206.4 294.98 Bxxxxxxxx.DBF where "xxxxxxxx" represents the USGS site-identification number Vector attribute table ArcInfo (R) GIS software STAID Numeric identifier for the site corresponding to the drainage basin NAWQA Data Warehouse site information retrieval 09-16-2011 USGS site identification number C1 SID from USGS National Water Information System (NWIS) database BAS_SQMI Drainage basin area, in square miles, determined by multiplying 0.0000003861 with the area in square meters, which is calculated by the GIS software. Area is calculated with the basin boundary in the National Albers Projection (projection parameters are listed under Spatial_Reference_Information). USGS 1 1,145,451 BAS_SQKM Drainage basin area, in square kilometers, determined by dividing the area in square meters by 1,000,000. The area, in square meters, is calculated by the GIS software. Area is calculated with the basin boundary in the National Albers Projection (projection parameters are listed under Spatial_Reference_Information). USGS 2 2,966,721 PCTINUS Percentage of drainage basin within the conterminous United States. Some basins extend into Canada or Mexico; these basins have a value less than 100. This number was determined by overlaying the basin boundary with a 1:2,000,000-scale digital map of U.S. boundaries and dividing the area of their intersection by the total basin area, then multiplying by 100. USGS 38.34 100.00 BAS_TYPE Type of drainage basin represented by the boundary. The type of drainage basin was inferred by comparing the drainage area computed from the boundary in this dataset (BASMI2) to the values of total drainage area and contributing drainage stored in the NAWQA Data Warehouse as of 09-16-2011. "dbtype" in appendix 3 from: Martin, J.D.; Eberle, Michael; and Nakagaki, Naomi, 2011, Sources and preparation of data for assessing trends in concentrations of pesticides in streams of the United States, 1992-2010: U.S. Geological Survey Data Series 655, 23 p., 5 app. tot total drainage basin boundary "dbtype" in appendix 3 from: Martin, J.D.; Eberle, Michael; and Nakagaki, Naomi, 2011, Sources and preparation of data for assessing trends in concentrations of pesticides in streams of the United States, 1992-2010: U.S. Geological Survey Data Series 655, 23 p., 5 app. con contributing drainage basin boundary "dbtype" in appendix 3 from: Martin, J.D.; Eberle, Michael; and Nakagaki, Naomi, 2011, Sources and preparation of data for assessing trends in concentrations of pesticides in streams of the United States, 1992-2010: U.S. Geological Survey Data Series 655, 23 p., 5 app. both total and contributing drainage basin boundaries are the same "dbtype" in appendix 3 from: Martin, J.D.; Eberle, Michael; and Nakagaki, Naomi, 2011, Sources and preparation of data for assessing trends in concentrations of pesticides in streams of the United States, 1992-2010: U.S. Geological Survey Data Series 655, 23 p., 5 app. unk unknown; the type of drainage basin could not be inferred "dbtype" in appendix 3 from: Martin, J.D.; Eberle, Michael; and Nakagaki, Naomi, 2011, Sources and preparation of data for assessing trends in concentrations of pesticides in streams of the United States, 1992-2010: U.S. Geological Survey Data Series 655, 23 p., 5 app. BAS_SRC Scale or resolution of the source(s) used to delineate the boundary The metadata files from USGS authors of drainage basin boundary. If the scale was not specified in the metadata, the scale was estimated by comparison to existing nationwide watershed boundaries. Compared to National Watershed Boundary Dataset (WBD), at the 1:24,000 scale and Hydrologic Unit Boundaries at the 1:250,000 scale. Sources used: Steeves, P.A. and Nebert, D.D., 1994, Hydrologic unit maps of the conterminous United States: U.S. Geological Survey, [digital data] accessed December 27, 2011, at https://water.usgs.gov/lookup/getspatial?huc250k. U.S. Department of Agriculture, 2009, National Watershed Boundary Dataset: Fort Worth, Tex., Natural Resources Conservation Service, National Cartography and Geospatial Center, accessed December 27, 2011 at http://www.ncgc.nrcs.usda.gov/products/datasets/watershed/. 24k,100k,250k,30m,60m,80m 24k = 1:24,000 scale 100k = 1:100,000 scale 250k = 1:250,000 scale 30m = 30-meter resolution 60m = 60-meter resolution 80m = 80-meter resolution User assigned BAS_PUB Identifies the source for the basin boundary if it has been published Existing publications "from Baker (2011)," "from Nakagaki (2010)," "from USGS (2004)", and "from USGS (2004) and Nakagaki (2010)" or blank if it has not been published by the USGS from Baker (2011) = Baker, N.T., 2011, National Stream Quality Accounting Network and National Monitoring Network Basin Boundary Geospatial Dataset, 2008-13: U.S. Geological Survey Data Series 641, 16 p., accessed December 7, 2011, at https://pubs.usgs.gov/ds/641/ from Nakagaki (2010) = Nakagaki, N., 2010, Drainage basins used for development of the watershed regressions for pesticides (WARP) model, accessed June 4, 2010, at https://water.usgs.gov/lookup/getspatial?warpbas2010 from USGS (2004) = U.S. Geological Survey, 2004, Watersheds for U.S. Geological Survey National Stream Quality Accounting Network (NASQAN) sampling sites 1996-2000, edition 1.0, accessed December 7, 2011, at https://water.usgs.gov/lookup/getspatial?nasqan2k from USGS (2004) and Nakagaki (2010) = published in both publications User assigned SIT_LAT83 Latitude (decimal degrees) of the USGS site corresponding to the drainage basin, in horizontal datum NAD83 C909 SLATD from USGS National Water Information System (NWIS) database 25.40 48.98 SIT_LON83 Longitude (decimal degrees) of the USGS site corresponding to the drainage basin, in horizontal datum NAD83, decimal degrees C910 SLONGD from USGS National Water Information System (NWIS) database -123.18 -71.14 SIT_NAME Name of the USGS site corresponding to the drainage basin C900 SNAME from USGS National Water Information System (NWIS) database Unique station names COMMENT Comment regarding unique issue(s) related to the basin or site USGS Unique issues regarding basin or site, or blank if there are none U.S. Geological Survey Michael Ierardi mailing

445 National Center

Reston VA 20192 USA 1-888-275-8747 (1-888-ASK-USGS) mierardi@usgs.gov Downloadable data Although these data have been used by the U.S. Geological Survey, U.S. Department of the Interior, no warranty expressed or implied is made by the U.S. Geological Survey as to the accuracy of the data. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the U.S. Geological Survey in the use of these data, software, or related materials. The use of firm, trade, or brand names in this report is for identification purposes only and does not constitute endorsement by the U.S. Geological Survey. The names mentioned in this document may be trademarks or registered trademarks of their respective trademark owners. ESRI Shapefiles and text files Shapefiles and metadata for each drainage basin ZIP-format archive 32.163 MB https://water.usgs.gov/GIS/dsdl/ds655_basins.zip None. This dataset is provided by USGS as a public service. 20201117 U.S. Geological Survey Ask USGS -- Water Webserver Team mailing

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Reston VA 20192 USA 1-888-275-8747 (1-888-ASK-USGS) mierardi@usgs.gov FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998