20190716 10144800 1.0 TRUE TRUE DEA Hydrologic Unit Codes 5. The Watershed Boundary Dataset (WBD) is a comprehensive aggregated collection of hydrologic unit data consistent with the national criteria for delineation and resolution. It defines the areal extent of surface water drainage to a point except in coastal or lake front areas where there could be multiple outlets as stated by the "Federal Standards and Procedures for the National Watershed Boundary Dataset (WBD)" “Standard” (http://pubs.usgs.gov/tm/11/a3/). Watershed boundaries are determined solely upon science-based hydrologic principles, not favoring any administrative boundaries or special projects, nor particular program or agency. This dataset represents the hydrologic unit boundaries to the 12-digit (6th level) for the entire United States. Some areas may also include additional subdivisions representing the 14- and 16-digit hydrologic unit (HU). At a minimum, the HUs are delineated at 1:24,000-scale in the conterminous United States, 1:25,000-scale in Hawaii, Pacific basin and the Caribbean, and 1:63,360-scale in Alaska, meeting the National Map Accuracy Standards (NMAS). Higher resolution boundaries are being developed where partners and data exist and will be incorporated back into the WBD. WBD data are delivered as a dataset of polygons and corresponding lines that define the boundary of the polygon. WBD polygon attributes include hydrologic unit codes (HUC), size (in the form of acres and square kilometers), name, downstream hydrologic unit code, type of watershed, non-contributing areas, and flow modifications. The HUC describes where the unit is in the country and the level of the unit. WBD line attributes contain the highest level of hydrologic unit for each boundary, line source information and flow modifications. The layers found under this service are within the Water tab on the DEA Environmental GIS Library. Click on individual services to see detailed metadata. Funding for the Watershed Boundary Dataset (WBD) was provided by the USDA-NRCS, USGS and EPA along with other federal, state and local agencies. Representatives from many agencies contributed a substantial amount of time and salary towards quality review and updating of the dataset in order to meet the WBD Standards. Acknowledgment of the originating agencies would be appreciated in products derived from these data. See dataset specific metadata for further information 16-digit Hydrologic Unit Code Region US 4-digit HUC United States Watershed Boundary Dataset 2-digit Basin 10-digit Hydrologic Units Sub-basin Watershed WBD 6-digit inlandWaters Sub-region Subwatershed 12-digit 14-digit 8-digit DEA GIS Library The distributor shall not be held liable for improper or incorrect use of this data, based on the description of appropriate/inappropriate uses described in this metadata document. It is strongly recommended that this data is directly acquired from the distributor and not indirectly through other sources which may have changed the data in some way. These data should not be used at scales greater than 1:24,000 for the purpose of identifying hydrographic watershed boundary feature locations in the United States. The Watershed Boundary Dataset is public information and may be interpreted by all organizations, agencies, units of government, or others based on needs; however, they are responsible for the appropriate application of the data. Photographic or digital enlargement of these maps to scales greater than that at which they were originally delineated can result in misrepresentation of the data. If enlarged, the maps will not include the fine detail that would be appropriate for mapping at the small scale. Digital data files are periodically updated and users are responsible for obtaining the latest version of the data from the source distributor. Acknowledgment of the origination agencies would be appreciated in products derived from these data. /9j/4AAQSkZJRgABAQEAAAAAAAD/2wBDAAgGBgcGBQgHBwcJCQgKDBQNDAsLDBkSEw8UHRofHh0a HBwgJC4nICIsIxwcKDcpLDAxNDQ0Hyc5PTgyPC4zNDL/2wBDAQkJCQwLDBgNDRgyIRwhMjIyMjIy MjIyMjIyMjIyMjIyMjIyMjIyMjIyMjIyMjIyMjIyMjIyMjIyMjIyMjIyMjL/wAARCACFAMgDAREA AhEBAxEB/8QAHwAAAQUBAQEBAQEAAAAAAAAAAAECAwQFBgcICQoL/8QAtRAAAgEDAwIEAwUFBAQA AAF9AQIDAAQRBRIhMUEGE1FhByJxFDKBkaEII0KxwRVS0fAkM2JyggkKFhcYGRolJicoKSo0NTY3 ODk6Q0RFRkdISUpTVFVWV1hZWmNkZWZnaGlqc3R1dnd4eXqDhIWGh4iJipKTlJWWl5iZmqKjpKWm p6ipqrKztLW2t7i5usLDxMXGx8jJytLT1NXW19jZ2uHi4+Tl5ufo6erx8vP09fb3+Pn6/8QAHwEA AwEBAQEBAQEBAQAAAAAAAAECAwQFBgcICQoL/8QAtREAAgECBAQDBAcFBAQAAQJ3AAECAxEEBSEx BhJBUQdhcRMiMoEIFEKRobHBCSMzUvAVYnLRChYkNOEl8RcYGRomJygpKjU2Nzg5OkNERUZHSElK U1RVVldYWVpjZGVmZ2hpanN0dXZ3eHl6goOEhYaHiImKkpOUlZaXmJmaoqOkpaanqKmqsrO0tba3 uLm6wsPExcbHyMnK0tPU1dbX2Nna4uPk5ebn6Onq8vP09fb3+Pn6/9oADAMBAAIRAxEAPwD3+gAo AKACgAoAKACgAoAKACgAoAKACgAoAKACgAoAKACgAoAKACgAoAKACgAoAKACgAoAKACgAoA57xNN eWdnbXFpMsJS6jEjvkqqMdpLDuBkdxXZgYU5zlCavdO3e610OTFSnGKlB21X3bGpYQSW1qEmuGuJ CS7SOMZJOeB2HoK5qslOV4qy7G9OLjGzd2Xag0CgAoAKACgAoAKACgAoAKACgAoAKACgAoAKACgA oAKACgAoAKACgDnfFssceiqk0ixwzXEUM0h/hRmG4/l+XXtXbl8W614q7SbXqlocmNklSs3ZNpP0 uQeF7o31xfk6i15HbuIoT0BjIDBj6tnIz/s1pj6fs4w9zlctX67W9OvzIwk+eUveulovT/M6mvOO 4KACgAoAKACgAoAKACgAoAKACgAoAKACgAoAKACgAoAKACgAoAKAOf8AE1pdzW1vd2cENy9nL5/2 aXpLgEcHsRnI9xXZgqkIylCo2uZWuun/AA5yYuE3FSgr8rvbuT6JqVzqdv8AaJrJLeFlBjZZxJv9 egGMf41GJw8KMuSMrvrpYvD1Z1VzONl63NmuY6AoAKACgAoAKACgAoAKACgAoAKACgAoAKACgAoA KACgAoAKACgAoAKAOM0vW2sI0sZLKRnnuZRabGB83Mrbs/3SuST7CvWxGFVVuopaJLm8tFb1uebR xHs1yOO7dvPX8LHZ15J6QUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFAHm c97PpUk00kkxk0+9k8hWRWjlZuWXcBuB2vnn+lfRRpRr2ikrTir73Vtn23R4cqkqTbe8W7dnf8dm ehWVwLuyhuAUPmIGzG25fwPcV4FSPLJx7Hs05c8VLuWqgsKACgAoAKACgAoAKACgAoAKACgAoAKA CgAoAKACgAoAKACgAoAKAOd1TTRHJLeQ2a3ccn/H3aEAiUAYDKDxvA+mR+FduHrXSpuXK18L7eTt 0/I5K1Kzc0rp7rv5+ph+FPEqtqD6W3mRWg4s/NUZC9lLAkdiP/r13ZhgWqarby+1b87HJg8Wuf2T 0XT/ACO+rxD1goAKACgAoAKACgAoAKACgAoAKACgAoAKACgAoAKACgAoAKACgAoAKAOA8R2Eenap YX0kKz2X29ZNgba8cjdceqk4bBPXPY17eCrOrSnTTtLla8ml+vQ8nF01TqRm1ePN+J3oYMAQQQeh FeI1bc9YdQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAc54z0ttX8Nzwxx s8qFZE2/eGDzgdzjPFd2WYhUMSpt6PT+vmceOoutQcVuU/A+sW93oMNozlLi3YwlZZAWfAzkfh+W K2zXDzhXdS2j10MsvrxlSUOq01Ovryz0QoAKACgAoAKACgAoAKACgAoAKACgAoAKACgAoAKACgAo AKACgAoAKAOJ1ezub3xdbNZ21qP7NQXOxm2NOXyMDjsVPPqa9fDVYU8LL2jfv6d7W/4c8yvTlPEL kS93X1v/AMMdJpupwalbiWNXjO9kMco2sGXgjHtXm1qEqUuV6+a21O6lWjUV1oaVZGoUAFABQAUA FABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAZWq2D3MIntCsd9D80EhHBP91v9k9DW+HrK MuWesHv/AJrzRhWptrmh8S2/y9Dnr2HTp5IdfaPCxP5d5D5pUxNkAscH7w4z6ivQpOtFPDJ76xdt /L0f5nHUVKTVe226vt5+q/I6Oy1mz1OWWOykMyRAZmQZjJPYN0JHcV51bD1KMU6itfp1+47KdeFR tQ1t16feadYm4UAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAch4z8NRatps9 1bKyX0UZZShx5mOxHf2NeplmOlQqqE/hf4HnY/CKrBzj8S/EzNIvLODS4Do+p6jDb7A0xe386KM9 9xI4Oc5wcV04mlUnVksRCLfTWzfp/wAFGFCpCNNOjJpddLpHdW13b3cXmW08Uyf3o3DD9K8OcJ09 Jqz8z1ozjNXi7likUFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFAHn1jpniX wvqFytlGt/pju0iQhgpG49sngj8jXuVq+DxlOLqPlmtLnkQpYnCzfIuaPYdN4otdD8Q4uLSa0t7m HfPFJGFKuDgMuDhsg4OPSlDLp4jD+7JSlF6Nduz7W6eo54yNCt7yaTWvqZkWvWNxDc21rfXTXBLP byTXvloE6jdlscdMdTXVPCVYOM5xVuqUbu/lp1MI4mEk4xk79Lu2nnqdh4f8RnW3lQWpVYlGZ0Ja J29FJA+v0rx8Zg/q6Tct+nU9HC4r291bbr0OiriOwKACgAoAKACgAoAKACgAoAKACgAoAKACgAoA KACgAoAKACgAoAz9U0mz1mz+zXsQkjzuB7qfUVtQxFTDz56bszKtRhWjyzR554n+G5htYJNEFxcS q210lkBwuOCOB0/rX0GBzvmk1iLJeSPGxeV2inRu2L8NNS+yXt/p2oTSR3TsuyOdzkkZBAB79KWe UeeEK1JXir7BlVXlnKnUevmepV80e8FABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQAUAFABQ AUAFABQBz2vaYdr6vYLHHqdvExSQrkOuOVb1rtwlfVUKusJP7vNHJiKX/L6n8SOH0TxHqHmWky3d xdCFzFcRvKm2TccKVyd33sdRwM817eLwVHllFxSvqnZ6W3v028zyqGJneLu3bR6rW/bruel2Ul7I rG8tY7cg/KEmMmR7/KMV83WjTT9yTfyt+rPcpub+JW+dy9WZoFABQAUAFABQAUAFABQAUAFABQAU AFABQAUAFABQAUAFABQAUAMdFkQowBVhgj1FCbTuhNXVmcXa/DyxtEuY47uXZM5ODGpKr6AkHkeo wa9epnNSbi3Faeb/AK+R50MshC6T3Oo0+x+wQmP7VPcDjBnfcRgetebVq+1d+VL0O2nT5Fa7fqX6 yNQoAKACgAoAKACgAoAKACgAoAKACgAoAKACgAoAKACgAoAKACgAoAKACgAoAKACgAoAKACgAoA/ /9k=