Identification_Information: Citation: Citation_Information: Originator: NH Department of Environmental Services, Watershed Management Bureau, Water Quality Planning Section Publication_Date: 20160819 Title: Great Bay Estuary Assessment Zones Geospatial_Data_Presentation_Form: vector digital data Online_Linkage: Description: Abstract: For 305(b)/303(d) water quality assessments, NHDES uses assessment units to cover the Great Bay Estuary that are coincident with the shellfish growing areas established by the NHDES Shellfish Program. Great Bay itself consists of seven different assessment units. Nitrogen and eutrophication parameters are logically evaluated utilizing data from larger aggregates of assessment units covering contiguous areas. Eutrophication effects are less localized than the bacteria pollution sources that affect shellfish harvesting. Therefore, NHDES aggregated the assessment units in the Great Bay Estuary into 27 assessment zones. The assessment zones were developed in cooperation with the PREP Technical Advisory Committee. For the Salmon Falls/Piscataqua River, the assessment zones cover both the New Hampshire and Maine sides of the main stem of the river. The river is well mixed and data from both sides of the state line are needed to provide a comprehensive dataset for assessments. However, the assessment determinations made by NHDES only apply to the New Hampshire side of the river. The Maine Department of Environmental Protection makes its own assessment determinations for the Maine side of the Salmon Falls/Piscataqua River. Purpose: Great Bay Estuary assessment zones used to evaluate nitrogen and eutrophication parameters for 305(b)/303(d) assessments purposes. These zones are also used by the Piscataqua Region Estuaries Partnership (PREP) for reporting eelgrass cover in their State of Our Estuaries reports. Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 20160819 Currentness_Reference: Publication Date Status: Progress: Complete Maintenance_and_Update_Frequency: Irregular Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -70.953305 East_Bounding_Coordinate: -70.405369 North_Bounding_Coordinate: 42.8539 South_Bounding_Coordinate: 43.227938 Keywords: Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: eelgrass Theme_Keyword: zones Theme_Keyword: assessment Place: Place_Keyword_Thesaurus: ISO 19115 Topic Category Place_Keyword: oceans Place_Keyword: Northeast Place_Keyword: New England Place_Keyword: New Hampshire Place_Keyword: Great Bay Access_Constraints: None Use_Constraints: This data set is to be used as a primary reference source. This is public information and may be interpreted by organizations, agencies, units of government, or others based on needs; however, they are responsible for the appropriate application. Federal, state, or local regulatory bodies are not to reassign to the New Hampshire Department of Environmental Services any authority for the decisions they make. Photographic or digital enlargement of these maps to scales greater than that at which they were originally delineated can cause misrepresentation of the data. If enlarged, the maps will not include the fine detail that would be appropriate for mapping at the small scale. Digital data files are periodically updated, and users are responsible for obtaining the latest version of the data Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Matt Wood Contact_Organization: New Hampshire Department of Environmental Services Contact_Position: Water Quality Specialist Contact_Address: Address_Type: Mailing and Physical Address Address: PO Box 95, 29 Hazen Drive City: Concord State_or_Province: New Hampshire Postal_Code: 03302 Contact_Electronic_Mail_Address: matthew.wood@des.nh.gov Contact_Voice_Telephone: 603-271-8868 Data_Quality_Information: Logical_Consistency_Report: None Completeness_Report: See use constraints. Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Vector Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains Point_and_Vector_Object_Count: 27 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Grid_Coordinate_System: Grid_Coordinate_System_Name: State Plane Coordinate System 1983 State_Plane_Coordinate_System: SPCS_Zone_Identifier: 2800 Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.999967 Longitude_of_Central_Meridian: -71.666667 Latitude_of_Projection_Origin: 42.500000 False_Easting: 984250.000000 False_Northing: 0.000000 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 0.000512 Ordinate_Resolution: 0.000512 Planar_Distance_Units: survey feet Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1983 Ellipsoid_Name: Geodetic Reference System 80 Semi-major_Axis: 6378137.000000 Denominator_of_Flattening_Ratio: 298.257222 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: GreatBayEstuaryAssessmentZones_Current Entity_Type_Definition: Great Bay Estuary Assessment Zones - Current Entity_Type_Definition_Source: None Attribute: Attribute_Label: OBJECTID Attribute_Definition: Internal feature number Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Sequential unique whole numbers that are automatically generated Attribute: Attribute_Label: LABEL Attribute_Definition: Zone label Attribute_Definition_Source: NHDES Attribute_Domain_Values: Unrepresentable_Domain: Text label Attribute: Attribute_Label: SHAPE_LENG Attribute_Definition: Length Attribute_Definition_Source: NHDES Attribute_Domain_Values: Unrepresentable_Domain: Length Attribute: Attribute_Label: SHAPE_AREA Attribute_Definition: Area of feature in internal units squared. Attribute_Definition_Source: NHDES Attribute_Domain_Values: Unrepresentable_Domain: Area Metadata_Reference_Information: Metadata_Date: 20160819 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: New Hampshire Department of Environmental Services Contact_Person: Matt Wood Contact_Address: Address_Type: unknown Address: PO Box 95, 29 Hazen Drive City: Concord State_or_Province: NH Postal_Code: 03302 Contact_Voice_Telephone: (603) 271-8868 Contact_Electronic_Mail_Address: matthew.wood@des.nh.gov Metadata_Standard_Name: FGDC Content Standard for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Time_Convention: local time