Data Desk Minnesota Pollution Control Agency (MPCA) 520 Lafayette Rd N St. Paul MN 55155 datadesk.mpca@state.mn.us 20220110 River TSS Regions Standards WIDs, Minnesota 2022-01-10 Minnesota Pollution Control Agency Minnesota Pollution Control Agency These data indicate the Total Suspended Solids (TSS) standard assignment for stream water units as of the publication date. The TSS assignment indicates which standard applies for that particular reach. For more information on the TSS standards, see: https://www.pca.state.mn.us/water/water-quality-standards-river-eutrophication-and-total-suspended-solids These streams are a subset and enhancement of the 1:24,000 scale National Hydrography Dataset (NHD). In cases where the NHD does not include a stream reach that MPCA has assessed, a feature is added by MPCA. These data are intended to be used for planning, informational, and cartographic purposes related to surface water quality in Minnesota. The data set is produced to reflect the most current stream Water Units (WIDs) for the State of Minnesota. The Minnesota Pollution Control Agency uses these aquatic unit delineations to support the study, assessment, and potential designation of impairments. The MPCA defines and creates the individual WIDs for assessment purposes. The To/From extent of Water Units may change between assessment cycles. WIDs contained in this dataset may differ from WIDs in the Impaired Waters datasets. The US Environmental Protection Agency makes the final and official decisions on assessment decisions, and due to the delay between assessments and final EPA approval, WIDs in this dataset may change before use in assessment and listing. The MPCA also maintains data sets containing WIDs that have been approved by US EPA. Data Desk Minnesota Pollution Control Agency (MPCA) 520 Lafayette Rd N St. Paul MN 55155 datadesk.mpca@state.mn.us environment, inlandWaters ISO 19115 Topic Category environment, inlandWaters NOTICE: The Geographic Information System (GIS) Data to which this notice is attached are made available pursuant to the Minnesota Government Data Practices Act (Minnesota Statutes Chapter 13). THE GIS DATA ARE PROVIDED TO YOU AS IS AND WITHOUT ANY WARRANTY AS TO THEIR PERFORMANCE, MERCHANTABILITY, OR FITNESS FOR ANY PARTICULAR PURPOSE. The GIS Data were developed by the Minnesota Pollution Control Agnecy for its own internal business purposes. The Minnesota Pollution Control Agency does not represent or warrant that the GIS Data or the data documentation are error-free, complete, current, or accurate. You are responsible for any consequences resulting from your use of the GIS Data or your reliance on the GIS Data. You should consult the data documentation for this particular GIS Data to determine the limitations of the GIS Data and the precision with which the GIS Data may depict distance, direction, location, or other geographic features. If you transmit or provide the GIS Data (or any portion of it) to another user, the GIS Data must include a copy of this disclaimer. river_tss_regions true -97.23 -89.53 49.37 43.5 These WIDs include eutrophication region assignments recorded in MPCA's standards database as of the publication date. 2025-02-04 Minnesota These data have been compared to the MPCA's standards database to ensure they align with the eutrophication region assignments recorded there. These data contain a feature for every stream water unit in Minnesota to which a river eutrophication standard is applicable, including border waters. Statements of horizontal positional accuracy are based on accuracy statements made for U.S. Geological Survey topographic quadrangle maps. These maps were compiled to meet National Map Accuracy Standards. For horizontal accuracy, this standard is met if at least 90 percent of points tested are within 0.02 inch (at map scale) of the true position. Additional offsets to positions may have been introduced where feature density is high to improve the legibility of map symbols. In addition, the digitizing of maps is estimated to contain a horizontal positional error of less than or equal to 0.003 inch standard error (at map scale) in the two component directions relative to the source maps. Visual comparison between the map graphic (including digital scans of the graphic) and plots or digital displays of points, lines, and areas, is used as control to assess the positional accuracy of digital data. Digital map elements along the adjoining edges of data sets are aligned if they are within a 0.02 inch tolerance (at map scale). Features with like dimensionality (for example, features that all are delineated with lines), with or without like characteristics, that are within the tolerance are aligned by moving the features equally to a common point. Features outside the tolerance are not moved; instead, a feature of type connector is added to join the features. This statement is generally true for the most common sources of NHD data. Other sources and methods may have been used to create or update NHD data. In some cases, additional information may be available from the data provider upon request. The processes used to create and maintain high-resolution NHD data can be requested from MPCA. Because NHD data can be downloaded using several user-defined areas, the process descriptions can vary for each download. The NHDMetadata table contains a list of all the process descriptions that apply to a particular download, and those descriptions can be associated with the impaired waters reaches by MPCA staff upon request. http://www.mngeo.state.mn.us/committee/standards/mgmg/metadata.htm river_tss_standards_wids MPCA OBJECTID GIS Feature ID Esri Shape GIS feature geometry Esri wid Water Unit ID, a waterbody identifer that is the WBD eight digit watershed code and the three digit reach number. This WID constitutes a unique identifer for each reach in the dataset. MPCA reach_name Name of the stream reach associated with the WID. MPCA use_class Use class per MN Statute 7050.0470 MPCA miles The length of the reach in miles. MPCA next_down The WID of the adjecent, downstream reach. MPCA coincident Identifies intentional overlapping WID segments; SSS indicates Site Specific Standard. MPCA orvw Indicates whether the water is included on the list of Outstanding Resource Value Waters, and whether it is Prohibited or Restricted Discharge. MPCA tss_region The TSS Region to which the reach is assigned. MPCA Shape_Length The length of the feature - as defined by feature geoemetry. ESRI 1.0 20260311 05372100 TRUE