## Montana State Library
GIS Data Dictionary
Metadata for Montana 2002 Surface Water Quality Assessment
Table of Contents

Identification Information
Data Quality Information
Spatial Data Organization Information
Spatial Reference Information
Entity and Attribute Information
Distribution Information
Metadata Reference Information
Full FGDC-compliant Metadata

### Identification_Information:

      Citation
        Originator:        Montana State Library
        Publication_Date:  01/14/2003
        Title:             Montana 2002 Surface Water Quality Assessment
        Online_Linkage:   http://nris.mt.gov/nsdi/nris/shape/tmdl2002.zip
      Description
        Abstract:
          This dataset contains streams listed in Montana's 2002 305(b) Report
          of water quality assessment determinations. It lists waters which have
          been assessed as fully supporting all applicable beneficial uses, waters
          determined to be water quality impaired for one or more beneficial uses,
          and waters where the information collected to date is not sufficient to
          complete beneficial use support determinations.  The "On-list" attribute
          can be used to select streams on the 303(d) List of Impaired and
          Threatened Waters. The 303(d) List, required by the federal Clean Water
          Act, focuses on waters in the state which have been assessed as having
          one or more of their beneficial uses impaired by human-caused pollution.
        Purpose:
          To allow users to query and display information from Montana's 305(b)
          Surface Water Quality Assessment Report.  Appropriate for 1:100,000 scale
          use.
      Time_Period_of_Content
        Calendar_Date:  2002
      Use_Constraints:
        This dataset is public information and may be interpreted by other
        organizations, however, they are responsible for the appropriate
        application of the data. Acknowledge the Montana Department of Environmental
        Quality as the data source.

### Data_Quality_Information:

      Attribute_Accuracy_Report:
        The Water Quality Assessment data was copied directly from
        the DEQ database.
      Horizontal_Positional_Accuracy_Report:
        Approximate horizontal accuracy is 51 meters, assuming
        source data meets National Map Accuracy Standards.
      Lineage
        Source_Information
          Originator:  U.S. Geological Survey
          Publication_Date:  1990
          Title:  1:100,000 scale Digital Line Graphs
          Source_Contribution:
            The lines in the data were selected from this source.
        Source_Information
          Originator:  Montana Dept of Environmental Quality
          Publication_Date:  2002
          Title:  2002 Surface Water Quality Assesement (305b Report)
          Source_Contribution:
            The attributes of the streams and lakes were copied from this source.
      Process_Step
        Process_Description:
          USGS's NHD coverages (derived from USGS Digital Line Graphs) were used
          to identify the reaches composing each waterbody segment included in the
          305(b) data set.  Assessment information relating to each waterbody is
          drawn from the 2002 305(b) update of the Montana ADB database.
        Process_Date:  2002

### Spatial_Data_Organization_Information:

      Direct_Spatial_Reference_Method:  Vector
      Point_and_Vector_Object_Information
        Number of Arcs:  16023
        Number of Polygons:  84

### Spatial_Reference_Information:

      Horizontal_Coordinate_System_Definition
        Grid_Coordinate_System_Name:  State Plane Coordinate System 1983
          SPCS_Zone_Identifier:  2500
          Map_Projection_Name:  Lambert Conformal Conic
          Standard_Parallel:  45
          Standard_Parallel:  49
          Longitude_of_Central_Meridian:  -109.5
          Latitude_of_Projection_Origin:  44.25
          False_Easting:   600000
          False_Northing:  0
        Planar_Distance_Units:  meters
        Geodetic_Model
          Horizontal_Datum_Name:  North American Datum of 1983

### Entity_and_Attribute_Information:

      Entity_Type_Definition:  Arc Attribute Table
        Attribute_Label: RCH_CODE
          Attribute_Definition: RCH_CODE from USGS National Hydrography Dataset
          Attribute_Domain_Values: All values are a 15 digit numeric code:
        Attribute_Label: Entity_ID
          Attribute_Definition:
            Entity_ID is unique to individual waterbody segments. Segments can be
            made up of multiple reaches.
          Attribute_Domain_Values:
            All the values consist of a combination of state abbreviation,
            Hydrologic unit identifier, and a sequence number.
        Attribute_Label: HUC
          Attribute_Definition: Hydrologic Unit Code
        Attribute_Label: SEGNAME
          Attribute_Definition: Name of the waterbody segment.
        Attribute_Label: SIZE
          Attribute_Definition: Length of the waterbody segment
        Attribute_Label: UNIT
          Attribute_Definition: Unit the Segsize is measured in
          Attribute_Domain_Values:
            M    Miles
            Ac   Acres
        Attribute_Label: ON_303_
          Attribute_Definition: On the 2002 303(d) Threatened and Impaired Waters List
          Attribute_Domain_Values:
            Y    On the 303(d) list
            N    Not on the 303(d) list
        Attribute_Label: Class
          Attribute_Definition:
            Waterbodies are assigned a class based on the level of protection that
            they require, the type of fisheries they support and their natural
            ability to support use for drinking water, agriculutre etc.
          Attribute_Domain_Values:
            A-Closed   Waters are suitable for drinking, culinary and food processing
                       purposes after simple. Also suitable for swimming, recreation,
                       and growth and propagation of fishes and associated aquatic
                       life (although access restrictions to protect public health may
                       limit actual use).

            A-1        Waters are suitable for drinking, culinary, and food processing
                       purposes after conventional treatment for removal of naturally
                       present impurities. Also suitable for bathing, swimming, and
                       recreation; growth and propagation of salmonid fishes and
                       associated aquatic life, waterfowl, and furbearers; and
                       agricultural and industrial water supply.

            B-1        Waters are suitable for drinking, culinary, and food processing
                       purposes after conventional treatment; bathing, swimming, and
                       recreation; growth and propagation of salmonid fishes and
                       associated aquatic life, waterfowl, and furbearers; and
                       agricultural and industrial water supply.

            B-2        Waters are suitable for drinking, culinary and food processing
                       purposes, after conventional treatment; bathing, swimming and
                       recreation; growth and marginal propagation of salmonid fishes
                       and associated aquatic life, waterfowl and furbearers; and
                       agricultural and industrial water supply.

            B-3        Waters are suitable for drinking, culinary, and food processing
                       purposes after conventional treatment; bathing, swimming, and
                       recreation; growth and propagation of non-salmonid fishes and
                       associated aquatic life, waterfowl, and furbearers; and
                       agricultural and industrial water supply.

            C-1        Waters are suitable for bathing, swimming, and recreation;
                       growth and propagation of salmonid fishes and associated
                       aquatic life, waterfowl and furbearers; and agricultural and
                       industrial water supply.

            C-2        Waters are suitable for bathing, swimming and recreation;
                       growth and marginal propagation of salmonid fishes and
                       associated aquatic life, waterfowl and furbearers; and
                       agricultural and industrial water supply.

            C-3        Waters are suitable for bathing, swimming, and recreation;
                       growth and propagation of non-salmonid fishes and associated
                       aquatic life, waterfowl and furbearers. Naturally marginal for
                       drinking, culinary, and food processing purposes, agriculture
                       and industrial water supply.

            I          Impaired. The State of Montana has a goal to improve these
                       waters to fully support the following uses: drinking, culinary,
                       and food processing purposes after conventional treatment;
                       bathing, swimming, and recreation; growth and propagation of
                       fishes and associated aquatic life, waterfowl, and furbearers;
                       and agricultural and industrial water supply.

        Attribute_Label: AQUATIC_LI
          Attribute_Definition:
            Beneficial Use - Aquatic life support for fishes and associated aquatic
            life, waterfowl and furbears
          Attribute_Domain_Values:
            Full Support       All water quality standard for this beneficial use
                               have been met
            Partial Support    Water quality standards for this beneficial use
                               have been partially met.
            Not Supported      Water quality standard for this benefical use have
                               not been met
            Threatened         Current trends indicate a high probability of future
                               impairment for this beneficial use
        Attribute_Label: COLD_WATER
          Attribute_Definition: Benefical Use - Cold Water Fishery-Trout
          Attribute_Domain_Values: Attribute values are the same as AQUATIC_LI
        Attribute_Label: WARM_FISH
          Attribute_Definition: Beneficial Use - Warm Water Fishery
          Attribute_Domain_Values: Attribute values are the same as AQUATIC_LI
        Attribute_Label: DRINKING
          Attribute_Definition: Drinking, culinary, and food processing
          Attribute_Domain_Values:
            Attribute values are the same as AQUATIC_LI
        Attribute_Label: PRIMARY_CO
          Attribute_Definition: Beneficial Use - Primary contact, bathing, recreation and aesthetics
          Attribute_Domain_Values:
            Attribute values are the same as AQUATIC_LI
        Attribute_Label: AGRICULTUR
          Attribute_Definition: Beneficial Use - Agricultural Water Supply
          Attribute_Domain_Values:
            Attribute values are the same as AQUATIC_LI
        Attribute_Label: INDUSTRY
          Attribute_Definition: Beneficial Use - Industrial Water Supply
          Attribute_Domain_Values:
            Attribute values are the same as AQUATIC_LI
        Attribute_Label: LISTING_ST
          Attribute_Definition: Combined beneficial use status of the waterbody segment
          Attribute_Domain_Values:
            Not Assessed   Information is not available to make an assessment
            Impaired          One or more beneficial use is impaired
            Full Support      All beneficial uses are fully supported
        Attribute_Label: SRCNAME
          Attribute_Definition: Source Name: Source cause of impairment
        Attribute_Label: CAUSENAME
          Attribute_Definition: Cause of impairment

### Distribution_Information:

### Metadata_Reference_Information:

      Metadata_Date:  01/29/2003
      Metadata_Contact:  Catherine Love