Lakes of Idaho (305(b) & 303(d) Integrated Report - Water Quality - 2002)

Lakes of Idaho (305(b) & 303(d) Integrated Report - Water Quality - 2002)

Frequently-asked questions:

What does this data set describe?

Title:
Lakes of Idaho (305(b) & 303(d) Integrated Report - Water Quality - 2002)

Abstract: 
Idaho 305(b) Lakes, Lakes Designated with Waterbody IDs, Beneficial Uses.  Support status for the 2002 CWA reporting year. Based upon 100k NHD Hydrography.

Supplemental information: 
The Water Body Assessment Guidance (WBAG) describes DEQ's methods for evaluating data and determining beneficial use support of Idaho water bodies. Assessing a water body involves analyzing and integrating multiple types of data to determine the degree of beneficial use support and biological integrity of the water body and compile descriptive information about the water body. The current WBAG, published in 2002, is referred to as “WBAG II,” as it replaced the original WBAG published in 1996.

DEQ recognizes three categories of beneficial use support status: fully supporting, not fully supporting, and not assessed. “Fully supporting” means that a water body is in compliance with water quality standards and criteria and supports all designated and existing beneficial uses. “Not fully supporting” refers to a water body that is not in compliance with all water quality standards or criteria or is not supporting all beneficial uses. The “not assessed” category describes water bodies that have either not been monitored by DEQ at all or have been monitored to some extent, but are missing critical information needed to complete an assessment.

ATTR_Val Field links to Designated Use Table

  1. How should this data set be cited?

    USGS, NHD, ID DEQ, 2001, Lakes of Idaho (305(b) & 303(d) Integrated Report - Water Quality - 2002): Idaho Department of Environmental Quality (IDEQ), Boise, ID USA.

    Online links:
    Other citation details:
    http://www.deq.idaho.gov/water/data_reports/surface_water/monitoring/ambient_plan_first_edition.pdf

  2. What geographic area does the data set cover?

    Bounding coordinates:
    West: -117.529731
    East: -110.672178
    North: 48.993733
    South: 41.971680

  3. What does it look like?

    http://www.deq.state.id.us/water/data_reports/surface_water/monitoring/ambient_plan_first_edition.pdf

    Thumbnail image:

  4. Does the data set describe conditions during a particular time period?

    Calendar date: 20060611
    Currentness reference: 
    20060611

  5. What is the general form of this data set?

    Geospatial data presentation form: vector digital data

  6. How does the data set represent geographic features?

    1. How are geographic features stored in the data set?

      This is a Vector data set. It contains the following vector data types (SDTS terminology):
      • G-polygon (970)

    2. What coordinate system is used to represent geographic features?

      The map projection used is Transverse Mercator.

      Projection parameters:
      Transverse Mercator
      Scale factor at central meridian: 0.999600
      Longitude of central meridian: -114.000000
      Latitude of projection origin: 42.000000
      False easting: 2500000.000000
      False northing: 1200000.000000

      Planar coordinates are encoded using coordinate pair.
      Abscissae (x-coordinates) are specified to the nearest 0.002048.
      Ordinates (y-coordinates) are specified to the nearest 0.002048.
      Planar coordinates are specified in meters.

      The horizontal datum used is North American Datum of 1983.
      The ellipsoid used is Geodetic Reference System 80.
      The semi-major axis of the ellipsoid used is 6378137.000000.
      The flattening of the ellipsoid used is 1/298.257222.

      Vertical coordinate system definition:
      Altitude system definition:
      Altitude resolution: 1.000000
      Altitude encoding method: Explicit elevation coordinate included with horizontal coordinates

  7. How does the data set describe geographic features?

    ID305B_LAKES_2002
     (Source: NHD, USGS, EPA Reach Files)

    EVENT_ID
    NHD Reach Indexing ID (Source: Reach Indexing tool)

    DUU_ID
    NHD Internal ID (Source: USGS NHD 100k)

    RCH_CODE
    USGS NHD Reach Code (Source: USGS)

    RCH_DATE
    Reach code Date (Source: USGS)

    ATTR_PRG
    State Program Code (Source: NHD, RTI)

    ATTR_VAL
    DEQ Waterbody ID (Source: DEQ, WBAG- link to Designated Uses Table)

    ENTITY_ID
    Assessment Unit Code (Source: Waterbody ID + Stream Segment Code, Links, joins to support status)

    STATE
    Idaho

    META_ID
    NHD Reach indexing ID Code (Source: Links To Reach Indexing Metadata)

    SQ_KM
    Area of Waterbody in KM (2) (Source: GIS Derived)

    HUCCODE
    4th Field HUC Code (Source: USGS)

    FID
    Internal feature number. (Source: ESRI)

    Sequential unique whole numbers that are automatically generated.

    LAKE_NM
    Lake Name (Source: USGS- NHD)

    Shape
    Feature geometry. (Source: ESRI)

    Coordinates defining the features.

    SHAPE
    Feature geometry. (Source: ESRI)

    Coordinates defining the features.

    STATUS
    EPA, ADB, DEQ Support Status (Source: Lake Monitoring Results)

    Value Definition
    Not Assessed 
    Waterbody has not been assessed
    Not Supporting 
    Waterbody has been assessed and does not meet IDEQ water quality standards
    Full Support 
    Waterbody has been assessed and meets IDEQ Waterquality standards

    SECTION_V
    impaired waters (Source: Listed as impaired on the 2002 303(d) List)

    WEBLINK
    URL of ADB Support Status Report (Source: IDEQ)

    deqgis83.DBO.IDLAKES_BENEFICAL_USES
    Entity and attribute overview: 
    NHD Linear referenced Waterbodies, with DEQ Waterbody ID -- Beneficial Uses
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Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)

    • USGS, NHD, ID DEQ

  2. Who also contributed to the data set?

    USGS, NHD, IDDEQ, Research Triangle Institute (RTI)

  3. To whom should users address questions about the data?

    Michael Edmonson
    Idaho DEQ
    305(b) 303(d) Program Coordinator
    1410 N Hilton
    Boise, ID 83706

    208 373 - 0502 (voice)
    michael.edmonson@deq.idaho.gov
    Hours of Service: 8:00 - 5:00 MT
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Why was the data set created?

Designated Uses, Benefical Uses, Clean Water Act. Surface Water Monitoring, ADB Database.  ATTR_VAL in attribute tables links to Beneficial Uses Table.

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How was the data set created?

  1. Where did the data come from?

    NHD (source 1 of 1)
    Type of source media: NHD 1:100,000 for Idaho
    Source scale denominator: 1:100,000 NHD Lakes, Waterbodies
    Source contribution: 
    Research Triangle Institude, USGS, EPA

  2. What changes have been made?

    Date: 20000830 (change 1 of 3) 
    Waterbodies with designated uses were linear referenced against 100K NHD  and attributed with
DEQ's Waterbody ID linking to Beneficial Uses.

Completeness or Accuracy has not been evaluated by DEQ on this dataset.

    Person responsible for change:
    Sean Coyle
    ID DEQ
    GIS Analyst
    1410 N Hilton
    Boise, ID 83706

    208 373 - 0502 (voice)
    sean.coyle@deq.idaho.gov
    Hours of Service: 8:00 - 5:00 MT

    Data sources used in this process:
    • ID 305B Lakes

    Dataset copied.

    Data sources used in this process:
    • Server=gis-boi-1; Service=esri_sde; Database=deqgis; User=jszpara; Version=sde.DEFAULT

    Dataset copied.

    Data sources used in this process:
    • Server=gis-boi-2; Service=5151:esri_sde; Database=deqgis83; User=jimszp; Version=JIMSZP.jim_szp version

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How reliable are the data; what problems remain in the data set?

  1. How well have the observations been checked?

    Unknown at this time

  2. How accurate are the geographic locations?

    1: 100,000 +- 167 ft   USGS mapping Standards

  3. How accurate are the heights or depths?

  4. Where are the gaps in the data? What is missing?

    The completeness of this dataset has been unverified by DEQ at this time.

  5. How consistent are the relationships among the observations, including topology?

    Unknown

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How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?

Access constraints: None, Appropriate for Scale, resolution and time period
Use constraints: 
None

Distributor 1 of 1

  1. Who distributes the data set?

    Bruce Godfrey
    Idaho Geospatial Data Clearinghouse
    GIS Specialist
    Box 442350
    Moscow, ID 83844-2350

    208.885.6463 (voice)
    bgodfrey@uidaho.edu

  2. What's the catalog number I need to order this data set?

  3. What legal disclaimers am I supposed to read?

    Although these data have been processed successfully on a computer system at the Idaho Geospatial Data Clearinghouse, no warranty, expressed or implied, is made regarding the utility of the data on any other system, nor shall the act of distribution constitute any such warranty.

  4. How can I download or order the data?

  5. Is there some other way to get the data?

  6. What hardware or software do I need in order to use the data set?

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Who wrote the metadata?

Dates:
Last modified: 20060622

Metadata author:
Jim Szpara
ID DEQ
Sr GIS Analyst
1410 N Hilton
Boise, ID 83706

208 373 -0502 (voice)
jim.szpara@deq.idaho.gov

Metadata standard:
FGDC Content Standards for Digital Geospatial Metadata(FGDC-STD-001-1998)

Metadata extensions used:
  • http://www.esri.com/metadata/esriprof80.html

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