Public Municipal Stormwater Systems

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Frequently-anticipated questions:

What does this data set describe?

Title: Public Municipal Stormwater Systems
Abstract:
The NC Center for Geographic Information and Analysis developed the GIS data set, Public Municipal Stormwater Systems, as mapped by contractors to the NC Rural Center (engineering firms McGill & Associates and Hobbs, Upchurch & Associates) during 2004, 2005, and 2006 to facilitate planning, siting and impact analysis in the 100 individual counties of North Carolina. This file enables the user to make various county-level determinations when used in conjunction with other data layers. The survey was in 2004, so this data would normally have been for calendar year 2003.
Supplemental_Information:
Revisions and updates to this layer include: 1.) March 2007 version was the first recorded release of this data.
  1. How should this data set be cited?

    NC Center for Geographic Information & Analysis, 20070306, Public Municipal Stormwater Systems: NC Center for Geographic Information & Analysis, Raleigh, North Carolina.

    Online Links:

    • Metadata - www.nconemap.com

    Other_Citation_Details: NCCGIA distributes this dataset

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -84.421925
    East_Bounding_Coordinate: -75.416567
    North_Bounding_Coordinate: 36.617518
    South_Bounding_Coordinate: 33.723370

  3. What does it look like?

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

    Beginning_Date: 2007
    Ending_Date: 06-Mar-2007
    Currentness_Reference: Data creation and revision date

  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?

      Indirect_Spatial_Reference: _Method: County name
      This is a Vector data set. It contains the following vector data types (SDTS terminology):
      • G-polygon (1691)

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

      Grid_Coordinate_System_Name: State Plane Coordinate System 1983
      State_Plane_Coordinate_System:
      SPCS_Zone_Identifier: 3200
      Lambert_Conformal_Conic:
      Standard_Parallel: 34.333333
      Standard_Parallel: 36.166667
      Longitude_of_Central_Meridian: -79.000000
      Latitude_of_Projection_Origin: 33.750000
      False_Easting: 609601.220000
      False_Northing: 0.000000

      Planar coordinates are encoded using coordinate pair
      Abscissae (x-coordinates) are specified to the nearest 0.001877
      Ordinates (y-coordinates) are specified to the nearest 0.001877
      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.

  7. How does the data set describe geographic features?

    storm
    Boundary extents of Public Municipal Stormwater Systems (Source: NC CGIA)

    SWSYID
    System ID number: 3 digit FIPS code plus “SW” plus “2004” plus 3 digit unique ID = 12 characters (Source: Stormwater system owner)

    Item varies

    LOCGOVNM
    Name of Local Government (Source: Stormwater system owner)

    Item varies

    NPDESRST
    NPDES Stormwater Regulatory Status (Source: Sewer system owner)

    ValueDefinition
    0No permit
    1Phase 1 permit
    2Phase 2 permit

    STPCS
    Primary County(s) Served (Source: Stormwater system owner)

    Item varies

    STPCP
    Primary Contact Person (Source: Stormwater system owner)

    Item varies

    STPCPT
    Superintendent, Director, etc) (Source: Stormwater system owner)

    Item varies

    STADDR
    Mailing Address (Source: Stormwater system owner)

    Item varies

    STPHN
    Phone Number (Source: Stormwater system owner)

    Item varies

    STFAX
    Fax Number (Source: Stormwater system owner)

    Item varies

    STEMAIL
    Email address (Source: Stormwater system owner)

    Item varies

    STUTIL
    Stormwater Utility (Source: Sewer system owner)

    ValueDefinition
    YStormwater utility is in place
    NStormwater utility is not in place

    STUTILRE
    Annual revenue from most recent fiscal year, in thousands of dollars. (Figure provided only if STUTIL = "Y".) (Source: Stormwater system owner)

    Item varies

    WQPROGIP
    Water quality programs administered locally: sediment and erosion control, water supply watershed, specific river basin rules (e.g. Neuse), CAMA rules, local buffer rules, or other. (Source: Stormwater system owner)

    Item varies

    SWGENSYC
    General System Condition (Source: Sewer system owner)

    ValueDefinition
    GGood
    FFair
    PPoor

    TOPOCODE
    Topographic Code (Source: Sewer system owner)

    ValueDefinition
    FFlat
    MModerate
    SSteep

    STMAP
    System Map (Source: Stormwater system owner)

    ValueDefinition
    YSystem is mapped
    NSystem is not mapped

    STGIS
    GIS Data (Source: Stormwater system owner)

    ValueDefinition
    YSystem map is in GIS format
    NSystem map is not in GIS format

    BMPSINPL
    BMP’s in service, owned or maintained by local government, "None" if none exist. (Source: Stormwater system owner)

    Item varies

    FLOODING
    Flooding Indicator (extent of flooding problems in the local government) (Source: Sewer system owner)

    ValueDefinition
    LLow
    MMedium
    HHigh

    NFIPSTAT
    NFIP regulatory status (no participation, participate at federal standard, or participate at higher standard). (Source: Stormwater system owner)

    Item varies

    NFIPCONT
    Name of the contact person at the local government. (Source: Stormwater system owner)

    Item varies

    NFIPPHON
    NFIP Contact Phone (Source: Stormwater system owner)

    Item varies

    STUPDATE
    Update Willingness (Source: Stormwater system owner)

    ValueDefinition
    YService owner is willing to update data annually
    NService owner is not willing to update data annually

    STSHARE
    Data Sharing. Local ordinance or policy regarding sharing electronic data about your system ("no ordinance or policy", "no sharing", or "limited sharing"). (Source: Stormwater system owner)

    Item varies

    OMSW04T
    Annual O&M Expenditure 2004. Total amount in thousands of dollars of most recent fiscal year O&M expenditure, 999999 if unknown. (Source: Stormwater system owner)

    Item varies

    CURCIP
    Current CIP Need (total amount in thousands of dollars for the estimated CIP needs for the system for the period FY04-05 through FY09-10 -- a 5 year period, defined as current need) (Source: Stormwater system owner)

    Item varies

    FUTCIP
    Future CIP Need (total amount in thousands of dollars for the estimated CIP needs for the system for the period FY10-11 through FY29-30 -- a 20 year period, defined as future need) (Source: Stormwater system owner)

    Item varies

    CURSOUR
    Source of current CIP value (either estimated by consultant or reported by system) (Source: Stormwater system owner)

    Item varies

    FUTSOUR
    Source of future CIP value (either estimated by consultant or reported by system). (Source: Stormwater system owner)

    Item varies

    Entity_and_Attribute_Overview:
    A dataset depicting the North Carolina Public Municipal Stormwater Systems. Polygons have attribute data including total area in coverage units (square meters), total perimeter (linear meters), polygon internal identification number, polygon user identification number, and pertinent system information.
    Entity_and_Attribute_Detail_Citation: None

Who produced the data set?

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

  2. Who also contributed to the data set?

    NCCGIA Director, Tim Johnson Database Administration, David Giordano

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

    NC CGIA
    301 N. Wilmington Street, Suite 700
    Raleigh, North Carolina 27601-2825
    U.S.A.

    (919) 733-2090 (voice)
    (919)715-0725 (FAX)
    dataq@ncmail.net

    Hours_of_Service: 8am to 5pm
    Contact_Instructions: Phone and electronic mail preferred

Why was the data set created?

The purpose of this data set is to inform users of key information about Public Municipal Stormwater Systems in North Carolina, with particular focus on system size and growth, regulatory compliance, and capital improvement needs of the systems.

How was the data set created?

  1. From what previous works were the data drawn?

    None (source 1 of 1)
    McGill & Associates and Hobbs, Upchurch & Associates, 2004-2007, Public Municipal Stormwater Systems: McGill & Associates and Hobbs, Upchurch & Associates, Contractor offices.

    Other_Citation_Details: Map series
    Type_of_Source_Media: Paper
    Source_Scale_Denominator: 100000
    Source_Contribution: Paper maps on which 1998 service area boundaries were plotted.

  2. How were the data generated, processed, and modified?

    Date: 2004 (process 1 of 4)
    The contractors collected graphic data from water and sewer system managers, and collected numeric data from water, sewer, and stormwater system managers throughout North Carolina. Graphic data was collected in one of two ways. If the system of interest was evaluated during the prior system survey of 1998, the new graphic data was collected by forwarding or delivering to each system manager a map of the water or sewer system pipes as they existed in 1998, having the system manager adjust system boundaries to reflect current and expected future boundaries, and making those edits to the 1998 polygons. If the system of interest was not evaluated in the 1998 survey, a map of the current and expected future boundaries of the system was requested from the system manager. In both cases, the current and expected future boundaries of the water or sewer system were ultimately digitized from the data provided by the system manager. In some cases, system managers reported no change in current or expected future system boundaries, and in those cases the resulting polygons are identical to those produced from the 1998 survey. For this study, current system boundaries were defined as those boundaries in existence at the time of the survey (2004). Future system boundaries were defined as the boundaries expected to exist in the year 2010. Numeric data was collected by crafting a table structure for the required data, forwarding a paper questionnaire developed from this data structure to each system manager, collecting that data as a written response to the questionnaire (via return mail or face-to-face meeting), then entering this data into the table structure.

    Person who carried out this activity:

    McGill & Associates
    c/o Harry Buckner
    55 Broad Street
    Asheville, North Carolina 28801
    U.S.A.

    (828) 252-0575 (voice)
    (828) 252-2518 (FAX)
    hbbuckner@mcgillengineers.com

    Hours_of_Service: 8:30AM - 5:30PM
    Contact_Instructions: Phone and electronic mail preferred
    Date: 2004 (process 2 of 4)
    Same process as outlined in previous step was followed for second contractor.

    Person who carried out this activity:

    Hobbs, Upchurch & Associates
    c/o Angela Mettlen
    2411 N. Oak Street, Suite 204
    Myrtle Beach, South Carolina 29577
    U.S.A.

    (843) 626-1910 (voice)
    (843) 626-1745 (FAX)
    info@hobbsupchurch.com

    Hours_of_Service: 8:30AM - 5:30PM
    Contact_Instructions: Phone and electronic mail preferred
    Date: 2004 (process 3 of 4)
    AMEC Earth and Environmental, Inc. of North Carolina (AMEC) took responsibility for managing the data structure, data connectivity, and quality control aspects of the graphic and numeric data generated for this project. AMEC integrated individual polygons into a statewide coverage of systems of various types, and also performed quality control reviews on numeric data and data ranges for numeric fields. AMEC identified disconnections between polygons and the underlying tabular data and worked with the other contractors and CGIA to rectify these disconnects. Using linear multivariate regression techniques, AMEC estimated current and future capital improvement needs for systems which had no published capital improvement plans.

    Person who carried out this activity:

    AMEC Earth & Environmental
    c/o Keith Readling
    4513 Creedmoor Road, Suite 400
    Raleigh, North Carolina 27612
    U.S.A.

    (919) 420-0590 (voice)
    (919) 420-0890 (FAX)
    keith.readling@amec.com

    Hours_of_Service: 8:30AM - 5:30PM
    Contact_Instructions: Phone and electronic mail preferred
    Date: 2004 (process 4 of 4)
    Service area boundaries and database were extensively reviewed by CGIA for accuracy and modified where needed.

    Person who carried out this activity:

    CGIA
    c/o Cheryl Pearce
    301 N. Wilmington Street, Suite 700
    Raleigh, North Carolina 27601-2825
    U.S.A.

    (919) 733-2090 (voice)
    (919)715-0725 (FAX)
    dataq@ncmail.net

    Hours_of_Service: 8am to 5pm
    Contact_Instructions: Phone and electronic mail preferred
  3. What similar or related data should the user be aware of?

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

  1. How well have the observations been checked?

    This data was collected by engineering firms McGill & Associates and Hobbs, Upchurch & Associates by survey and site visit.

  2. How accurate are the geographic locations?

    System boundaries were reviewed by CGIA for accuracy and modified as needed.

  3. How accurate are the heights or depths?

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

    This data layer represents the Public Municipal Stormwater Systems of all counties in North Carolina.

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

    Using ESRI's ARC/INFO GIS software, the data set was built for arc and polygon topology using the "build" command. The data set was then cleaned with a fuzzy tolerance of 10 meters. Topology has not been edited since the last build or clean.

How can someone get a copy of the data set?

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

Access_Constraints: None
Use_Constraints:
Acknowledgement of products derived form this dataset should cite the following: The source of the Public Municipal Stormwater Systems data is NC OneMap. Earlier versions of this data set may exist. The user must be sure to use the appropriate dataset for the time period of interest. While efforts have been made to ensure that these data are accurate and reliable within the state of the art, CGIA cannot assume liability for any damages or misrepresentation caused by any inaccuracies in the data or as a result of changes to the data caused by system transfers.

  1. Who distributes the data set? (Distributor 1 of 1)

    NC Center for Geographic Information and Analysis
    Production Services
    301 N. Wilmington Street, Suite 700
    Raleigh, North Carolina 27601-2825
    U.S.A.

    (919) 733-2090 (voice)
    (919)715-0725 (FAX)
    dataq@ncmail.net

    Hours_of_Service: 8am to 5pm
    Contact_Instructions: Phone and electronic mail preferred
  2. What's the catalog number I need to order this data set?

    Public Municipal Stormwater Systems

  3. What legal disclaimers am I supposed to read?

    NCCGIA is charged with the development and maintenance of NC OneMap and, in cooperation with other mapping organizations, is committed to offering its users accurate, useful, and current information. Although every effort has been made to ensure the accuracy of information, errors and conditions originating from physical sources used to develop this dataset may be reflected in the data supplied. The user must be aware of possible conditions and bear responsibility for the appropriate use of the information with respect to possible errors, original map scale, collection methodology, currency of data, and other conditions specific to certain data. NCCGIA does not support secondary distribution of this dataset without its current, compliant metadata record. The use of trade names or commercial products does not constitute their endorsement by NCCGIA or North Carolina State Government.

  4. How can I download or order the data?

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

    Data can be customized on a cost-recovery basis. Contact dataq@ncmail.net or 919-733-2090 for more information.

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

    All formats available from www.nconemap.com are in ESRI shapefile. Other formats are available on a cost-recovery basis - contact dataq@ncmail.net or 919.733.2090 for more information. Format compatibility is the user's responsibility.

Who wrote the metadata?

Dates:
Last modified: 20-Apr-2007
Metadata author:
North Carolina Center for Geographic Information and Analysis
c/o David Giordano
Database Administration
301 N. Wilmington Street, Suite 700
Raleigh, North Carolina 27601-2825
U.S.A.

(919) 733-2090 (voice)
(919)715-0725 (FAX)
dataq@ncmail.net

Hours_of_Service: 8am to 5pm
Contact_Instructions: Phone and electronic mail preferred
Metadata standard:
FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)
Metadata extensions used:

Generated by mp version 2.9.5 on Wed Aug 27 10:31:19 2008