Kristofor Parson Minnesota Pollution Control Agency Data Specialist 218-302-6622 525 S. Lake Ave. Duluth MN 55802 kristofor.parson@state.mn.us 20190206 withheld Assessed Lakes Points, Minnesota, 2016 2019-02-06 Minnesota Pollution Control Agency Minnesota Pollution Control Agency This is a proposed set of centroids of the lakes assessed by MPCA's surface water quality assessment process for the 2016 303(d)/305(b) integrated report to EPA. The lakes included in the dataset were submitted to EPA in January, 2017. EPA approved the data without requesting any changes in January, 2019. These lakes are a subset and enhancement of the 1:24,000 scale National Hydrography Dataset (NHD). In cases where the NHD does not include lakes that MPCA has assessed, additional lakes from the MN Department of Natural Resources (DNR) Division of Waters lakes database are added. Since the assessed lakes are a small subset of the NHD and DNR lakes, only that subset is included in the dataset. This dataset includes impaired lakes which have not yet had a TMDL plan approved by the US EPA as well as lakes that support aquatic recreation and those that had insufficient information to render a support judgment. These data are intended to be used for planning, informational, and cartographic purposes related to surface water quality in Minnesota. Kristofor Parson Minnesota Pollution Control Agency Info Tech Spec III 218-302-6622 525 S. Lake Ave. Duluth MN 55802 kristofor.parson@state.mn.us Minnesota inlandWaters, surface water, water chemistry, water quality ISO 19115 Minnesota inlandWaters, surface water, water chemistry, water quality 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. More information on surface water assessments, including the impaired waters list, can be found on the Minnesota Pollution Control Agency's website here: https://www.pca.state.mn.us/water/minnesotas-impaired-waters-list true -97.23 -89.53 49.37 43.5 2019-02-06 Minnesota These data have been audited to ensure every beach included in the 305(b) submission to EPA has a corresponding feature in this dataset, and that the use judgments are consistent between this spatial dataset and the assessment database as of the publication date. Date of test: 1/13/17 These data contain a feature for every beach in the 305(b) inventory of assessed waters. High-resolution NHD is the primary dataset from which these features are drawn. If no feature exists in the NHD, MPCA staff will digitize a feature. 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. http://www.mngeo.state.mn.us/committee/standards/mgmg/metadata.htm All lakes contained in this shapefile are included in the 2016 surface water quality assessments prepared by the Minnesota Pollution Control Agency. AUID: Assessment Unit ID, the DNR DOWLKNUM with hypens between 2 digit county, 4 digit lake number and 2 digit bay id. NAME: Name of the waterbody associated with the AUID. LOC_DESC: A description of the waterbody's location. USE_CLASS: The use class according to MN statute 7050.0470 OVERALLCAT: The overall category of the lake according to Minnesota's adaptation of the EPA's Consolidation Assessment and Listing Methodology (CALM) categories and subcategories. 1: All designated uses are met and no use threatened. 2: Some uses are met; none are threatened and insufficient data to assess other uses. 3A: No data or information to determine if any designated use is attained. 3B: Data are available for a review and generally indicate non-support, but insufficient data and information to determine TMDL impairment. (Example: single lake data point showing non-support) 3C: Data available that currently has no assessment tools to allow its use in assessing. (Example: data with only eco-region expectation standards) 3D: Data are available for a review and generally indicate full support, but insufficient data and information to assess for category 1 or 2. 3E: Data are available for a review, but insufficient data and information to determine full support or TMDL impairment. (Example: lake data just below the threshold showing non-support) 4A: Impaired or threatened but all needed TMDLs have been completed* 4B: Impaired or threatened but does not require a TMDL because it is expected to attain standards in the near future* 4C: Impaired or threatened but does not require a TMDL because impairment not caused by a pollutant* 4D: Impaired or threatened but does not require a TMDL because impairment is solely a result of natural sources* 5A: Impaired or threatened by multiple pollutants and no TMDL plans approved. 5B: Impaired or threatened by multiple pollutants and either some TMDL plans approved but not all or at least one impairment is the result of natural conditions. 5C: Impaired or threatened by one pollutant. * Assessment units falling into category 4 are impaired waters, but are not part of the 303(d) list because of the reasons given above in the category descriptions. EPA has identified subcategories 4A, 4B, and 4C for classifying a segment, where available data and/or information indicate that at least one designated use is not being supported or is threatened, but a TMDL is not needed. Minnesota has chosen to further subdivide Category 4C into subcategories 4C and 4D to differentiate between cases of impairment due to non-pollutants (4C) and natural background (4D). All category 4 waters appear with the category 5 waters on an impaired waters inventory, which is a comprehensive list of all the current impaired assessment unit/pollutant combinations. CYCLE_LAST: The last cycle during which the waterbody was assessed. WATER_SIZE: The area of the waterbody, in acres, according to the National Hydrography Dataset. AQR: Aquatic Recreation Assessment FS: Fully Supporting aquatic recreation use IF: Insufficient Information for an assessment NA: Not Assessed NS: Not Supporting aquatic recreation use AQR_CAT: The CALM category for the Aquatic Recreation use class. AQC: Aquatic Consumption Assessment IF: Insufficient Information for an assessment NA: Not Assessed NS: Not Supporting aquatic consumption use AQC_CAT: The CALM category for the Aquatic Consumption use class. AQL: Aquatic Life Assessment FS: Fully Supporting aquatic life use IF: Insufficient Information for an assessment NA: Not Assessed NS: Not Supporting aquatic life use AQL_CAT: The CALM category for the Aquatic Life use class. DW: Drinking Water Assessment FS: Fully Supporting drinking water use IF: Insufficient Information for an assessment NA: Not Assessed NS: Not Supporting drinking water use DW_CAT: The CALM category for the Drinking Water use class. 1.0 20260311 00331100 TRUE