impaired_2014_lakes_final
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17.204
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GCS_North_American_1983
Linear Unit: Meter (1.000000)
North_America_Albers_Equal_Area_Conic
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FGDC CSDGM Metadata
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FGDC
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Kristofor Parson
Minnesota Pollution Control Agency
Data Specialist
218-302-6622
525 S. Lake Ave.
Duluth
MN
55802
kristofor.parson@state.mn.us
20180529
Impaired Lakes, Minnesota, 2014 (Final)
2018-05-29
Minnesota Pollution Control Agency
Minnesota Pollution Control Agency
This is a set of the impaired lakes as determined by MPCA's surface water quality assessment process in 2012 and 2013 for the 2014 reporting cycle to US Environmental Protection Agency (EPA). Lakes declared impaired prior to 2012 are also included in this dataset unless they have been delisted. Impairments on waterbodies included in the dataset were approved by EPA on May 29th, 2018. 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 impaired 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, those that have a US EPA approved TMDL plan as well as those lakes that do not need a TMDL plan.
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
Data Specialist
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
inlandWaters, surface water, water chemistry, water quality
Minnesota
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.
Detailed information regarding the impaired waterbodies is available in spreadsheet form here: http://www.pca.state.mn.us/index.php/view-document.html?gid=20205
true
199125.3915
762254.478
5471343.7754
4816373.2963
These data reflect the state of the MPCA's surface water assessment database as of the dataset publication date.
2018-05-29
State of Minnesota
These data have been audited to ensure every waterbody included in the draft 2014 list of impaired waters has a corresponding feature within this spatial dataset. Date of test: 11/25/2013
These data contain a feature for every waterbody in the draft impaired waters dataset. High-resolution NHD is the primary dataset from which these features are drawn. If no feature exists in the NHD, the MN DNR division of waters lakes database is the source.
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 polygons by MPCA staff upon request. MN DNR lake polygons are maintained to meet DNR business requirements, however, MPCA makes requests for DNR to add lakes to thier lakes DB for cases where MCPA monitors a waterbody that does not have an existing DNR feature. For information on specific polygons contact MPCA.
http://www.gis.state.mn.us/stds/metadata.htm
impaired_2014_lakes_final
Feature Class
1543
FID
Internal feature number.
Esri
Sequential unique whole numbers that are automatically generated.
FID
OID
4
0
0
Shape
Feature geometry.
Esri
Coordinates defining the features.
Shape
Geometry
0
0
0
WATER_NAME
WATER_NAME
String
100
0
0
LOCATION
LOCATION
String
120
0
0
ACRES
ACRES
Double
19
0
0
AUID
AUID
String
12
0
0
CAT
CAT
String
3
0
0
AFFECTED_U
AFFECTED_U
String
254
0
0
NOPLN
NOPLN
String
254
0
0
APPROVED
APPROVED
String
254
0
0
NEEDSPLN
NEEDSPLN
String
254
0
0
IMPAIR_PAR
IMPAIR_PAR
String
254
0
0
NEW_2014
NEW_2014
String
50
0
0
HUC8
HUC8
String
8
0
0
HUC8_NAME
HUC8_NAME
String
50
0
0
HUC4
HUC4
String
10
0
0
BASIN
BASIN
String
50
0
0
ALL_COUNTI
ALL_COUNTI
String
55
0
0
WDWMO_NAME
WDWMO_NAME
String
150
0
0
WDWMO_TYPE
WDWMO_TYPE
String
30
0
0
Chloride
Chloride
String
20
0
0
HgF
HgF
String
20
0
0
HgW
HgW
String
20
0
0
Nutrients
Nutrients
String
20
0
0
PCBF
PCBF
String
20
0
0
PFOS_W
PFOS_W
String
20
0
0
SHAPE_Leng
SHAPE_Leng
Double
19
0
0
SHAPE_Area
Area of feature in internal units squared.
Esri
Positive real numbers that are automatically generated.
SHAPE_Area
Double
19
0
0
All lakes contained in this shapefile are on the draft 2014 Impaired Waters list prepared by the Minnesota Pollution Control Agency.
WATER_NAME: Name of the waterbody associated with the AUID
LOCATION: A rough description of the lake's location
ACRES: The acreage of the waterbody, as reported to EPA.
AUID: Assessment Unit ID, a waterbody identifer that consists of two digits representing the county, four digits representing the unique waterbody within that county, and two digits representing the bay number, where applicable. If no bay is designated, this is left as '00'. This AUID constitutes a unique identifer for each lake in the dataset.
CAT: EPA Consolidation Assessment and Listing Methodology [CALM] category, which integrates the 305(b) Report with the 303(d) TMDL List. The five categories in CALM are as follows: Category 1: all designated uses are meeting water quality standards Category 2: some uses are meeting water quality standards and there are insufficient data to assess other uses Category 3: there are insufficient data to assess any uses Category 4: at least one use is impaired, but a TMDL is not required Category 5: at least one use is impaired and a TMDL is required. These become the List of impaired waters. A reach can only be placed into one Category. For example, if a reach is impaired for one pollutant but the other uses are being met, and a TMDL is required, that reach would be placed into Category 5. Furthermore, if the reach is impaired for more than one pollutant, the reach must stay in Category 5 until ALL pollutants have EPA-approved TMDL plans. For 'bookkeeping' purposes, these Categories can be sub-divided. Category 4 has the following four sub-categories: 4A: Impaired, but a TMDL study has been approved by EPA 4B: Impaired, but a TMDL study is not required because water quality standards are expected to be met in the near future 4C: Impaired, but a TMDL study is not required because the impairment is not caused by a pollutant 4D: An assessment unit is impaired or threatened but doesn't require a TMDL because the impairment is due to natural conditions with only insignificant anthropogenic influence. To be considered 'insignificant', the elimination of the anthropogenic influence would not lead to the attainment of water quality standards and it would not be included in formal pollution reduction goal-setting activities. A reach-specific water quality standard based on local natural conditions has yet to be determined. Upon determination, the assessment unit will be considered non-impaired for the natural conditions and re-categorized to an appropriate category. 4E: Impaired or threatened but existing data indicates a TMDL is not required because impairment is solely a result of natural sources; a final determination of Category 4D will be made in the next assessment cycle pending confirmation from additional information (i.e. water quality or land use). Category 5 has the following three sub-categories: 5A: Impaired by multiple pollutants and no TMDL study plans are approved by EPA 5B: Impaired by multiple pollutants and at least one TMDL study plan is approved by EPA 5C: Impaired by one pollutant and no TMDL study plan is approved by EPA
AFFECTED_U: Impaired Use(s)
Values: AQC: Aquatic Consumption
AQR: Aquatic Recreation
a combination of these values
NOPLN: The parameter(s) for which no TMDL plans is required
Nutrients: Nutrient/Eutrophication Biological Indicators
APPROVED: The parameter(s) for which TMDL plans have been approved
Values:
HgF: Mercury in Fish Tissue
HgW: Mercury in Water Column
Nutrients: Nutrient/Eutrophication Biological Indicators
NEEDSPLN: The pollutant(s) for which TMDL plans must be developed and approved
Values:
CL-: Chloride
HgF: Mercury in Fish Tissue
HgW: Mercury in Water Column
Nutrients: Nutrient/Eutrophication Biological Indicators
PCBF: PCB in Fish Tissue
PFOS-W: Perfluorooctane Sulfonate (PFOS) in Water Column
IMPAIR_PAR: Parameters listed in APPROVED and NEEDSPLN that cause the stream to be impaired
NEW_2014: Parameters proposed to be listed for the first time in 2014
Values:
CL-: Chloride
HgF: Mercury in Fish Tissue
Nutrients: Nutrient/Eutrophication Biological Indicators
HUC8: The numeric code of the 8 digit Watershed Boundary Dataset (WBD) polygon that this waterbody is primarily associated with.
HUC8_NAME: The name of the DNR major watershed that this waterbody is primarily associated with.
HUC4: The numeric code of the 4 digit Watershed Boundary Dataset (WBD) polygon that this waterbody is primarily associated with.
BASIN: The name of the basin (HUC4) in which this waterbody is located
ALL_COUNTIES: The name of the counties that intersect this waterbody
WDWMO_NAME: The name of Watershed District(s) or Watershed Management Organization(s) that intersect this waterbody.
WDWMO_TYPE: The type(s) of WDWMO that intersect this polygon.
Values:
COU = County
WD = Watershed District
WMO = Watershed Management Organization
Target start year fields:
These fields indicate the target start year for a TMDL addressing their respective pollutants. The attribute also indicates cases with an approved TMDL or a natural background impairment.
Fields:
Chloride: Chloride
HgF: Mercury in fish tissue
HgW: Mercury in the water column
Nutrients: Nutrient/Eutrophication Biological Indicators
PCBF: PCB in Fish Tissue
PFOS_W: Perfluorooctane Sulfonate (PFOS) in Water Column