Identification_Information: Citation: Citation_Information: Originator: Federal Emergency Management Agency Publication_Date: 20060210 Title: DIGITAL FLOOD INSURANCE RATE MAP DATABASE, ROCKINGHAM COUNTY, NEW HAMPSHIRE Geospatial_Data_Presentation_Form: Vector Digital Data Publication_Information: Publication_Place: Washington, DC Publisher: Federal Emergency Management Agency Other_Citation_Details: 33015C_20050517_metadata Online_Linkage: Larger_Work_Citation: Citation_Information: Originator: Complex Systems Research Center, University of New Hampshire Publication_Date: 19860101 Title: NH GRANIT Database Publication_Information: Publication_Place: Durham, New Hampshire Publisher: Complex Systems Research Center, University of New Hampshire Online_Linkage: Description: Abstract: The Digital Flood Insurance Rate Map (DFIRM) Database depicts flood risk information and supporting data used to develop the risk data. The primary risk classifications used are the 1-percent-annual-chance flood event, the 0.2-percent-annual-chance flood event, and areas of minimal flood risk. The DFIRM Database is derived from Flood Insurance Studies (FISs), previously published Flood Insurance Rate Maps (FIRMs), flood hazard analyses performed in support of the FISs and FIRMs, and new mapping data, where available. The FISs and FIRMs are published by the Federal Emergency Management Agency (FEMA). The specifications for the horizontal control of DFIRM data files are consistent with those required for mapping at a scale of 1:12,000. Purpose: The FIRM is the basis for floodplain management, mitigation, and insurance activities for the National Flood Insurance Program (NFIP). Insurance applications include enforcement of the mandatory purchase requirement of the Flood Disaster Protection Act, which "... requires the purchase of flood insurance by property owners who are being assisted by Federal programs or by Federally supervised, regulated or insured agencies or institutions in the acquisition or improvement of land facilities located or to be located in identified areas having special flood hazards," Section 2 (b) (4) of the Flood Disaster Protection Act of 1973. In addition to the identification of Special Flood Hazard Areas (SFHAs), the risk zones shown on the FIRMs are the basis for the establishment of premium rates for flood coverage offered through the NFIP. The DFIRM Database presents the flood risk information depicted on the FIRM in a digital format suitable for use in electronic mapping applications. The DFIRM database is a subset of the Digital FIS database that serves to archive the information collected during the FIS. Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 20050517 Currentness_Reference: FIRM and FIS effective date Status: Progress: Complete Maintenance_and_Update_Frequency: Irregular Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -71.5013 East_Bounding_Coordinate: -70.4906 North_Bounding_Coordinate: 43.3762 South_Bounding_Coordinate: 42.6195 Keywords: Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: FEMA Flood Hazard Zone Theme_Keyword: DFIRM Theme_Keyword: Digital Flood Insurance Rate Map Theme_Keyword: Special Flood Hazard Area Theme_Keyword: DFIRM Database Theme_Keyword: NFIP Theme_Keyword: SFHA Theme_Keyword: Flood Insurance Rate Map Theme_Keyword: FIRM Theme_Keyword: Riverine flooding Theme_Keyword: Base Flood Elevation Theme_Keyword: Floodway Theme_Keyword: Coastal flooding Theme_Keyword: Island water resources Place: Place_Keyword_Thesaurus: None Place_Keyword: ROCKINGHAM COUNTY Place_Keyword: NEW HAMPSHIRE Access_Constraints: None Use_Constraints: The hardcopy FIRM and DFIRM and the accompanying FISs are the official designation of SFHAs and Base Flood Elevations (BFEs) for the NFIP. For the purposes of the NFIP, changes to the flood risk information published by FEMA may only be performed by FEMA and through the mechanisms established in the NFIP regulations (44 CFR Parts 59-78). These digital data are produced in conjunction with the hardcopy FIRMs and generally matches the hardcopy map exactly. However the hardcopy flood maps and flood profiles are the authoritative documents for the NFIP. Acknowledgement of FEMA would be appreciated in products derived from these data. Point_of_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: Federal Emergency Management Agency Contact_Position: Federal Insurance and Mitigation Administration Contact_Address: Address_Type: mailing address Address: 500 C Street, S.W. City: Washington State_or_Province: District of Columbia Postal_Code: 20472 Country: USA Contact_Voice_Telephone: 1-800-358-9616 Contact_Electronic_Mail_Address: www.fema.gov/msc Browse_Graphic: Browse_Graphic_File_Name: Browse_Graphic_File_Description: gif image file Browse_Graphic_File_Type: gif Native_Data_Set_Environment: Original data development environment varies. Finishing of the data is done using ESRI's ArcGIS software. Cross_Reference: Citation_Information: Originator: Federal Emergency Management Agency Publication_Date: 20050517 Title: Flood Insurance Study, ROCKINGHAM COUNTY, NEW HAMPSHIRE Geospatial_Data_Presentation_Form: Document Publication_Information: Publication_Place: Washington, DC Publisher: Federal Emergency Management Agency Cross_Reference: Citation_Information: Originator: Federal Emergency Management Agency Publication_Date: 20050517 Title: Flood Insurance Rate Map, ROCKINGHAM COUNTY, NEW HAMPSHIRE Geospatial_Data_Presentation_Form: Map Publication_Information: Publication_Place: Washington, DC Publisher: Federal Emergency Management Agency Cross_Reference: Citation_Information: Originator: Federal Emergency Management Agency Publication_Date: 20050517 Title: Raster DFIRM, ROCKINGHAM COUNTY, NEW HAMPSHIRE Geospatial_Data_Presentation_Form: Raster Digital Data Publication_Information: Publication_Place: Washington, DC Publisher: Federal Emergency Management Agency Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: The DFIRM Database consists of countywide vector files and associated attributes produced in conjunction with the hard copy FEMA FIRM. The published effective FIRM and DFIRM maps are issued as the official designation of the SFHAs. As such they are adopted by local communities and form the basis for administration of the NFIP. For these purposes they are authoritative. Provisions exist in the regulations for public review, appeals and corrections of the flood risk information shown to better match real world conditions. As with any engineering analysis of this type, variation from the estimated flood heights and floodplain boundaries is possible. Details of FEMA's requirements for the FISs and flood mapping process that produces these data are available in the Guidelines and Specifications for Flood Hazard Mapping Partners. Attribute accuracy was tested by manual comparison of source graphics with hardcopy plots and a symbolized display on an interactive computer graphic system. Independent quality control testing of FEMA's DFIRM database was also performed. To obtain more detailed information in areas where Base Flood Elevations (BFEs) and/or floodways have been determined, users are encouraged to consult the Flood Profiles and Floodway Data and/or Summary of Stillwater Elevations tables contained within the FIS report that accompanies this DFIRM database. Users should be aware that BFEs shown in the S_BFE table represent rounded whole-foot elevations. These BFEs are intended for flood insurance rating purposes only and should not be used as the sole source of flood elevation information. Accordingly, flood elevation data presented in the FIS report must be used in conjunction with the FIRM for purposes of construction and/or floodplain management. The 1-percent-annual-chance water-surface elevations shown in the S_XS table match the regulatory elevations shown in the FIS report. Logical_Consistency_Report: When FEMA revises an FIS, adjacent studies are checked to ensure agreement between flood elevations at the boundaries. Likewise flood elevations at the confluence of streams studied independently are checked to ensure agreement at the confluence. The FIRM and the FIS are developed together and care is taken to ensure that the elevations and other features shown on the flood profiles in the FIS agree with the information shown on the FIRM. However, the elevations as shown on the FIRM are rounded whole-foot elevations. They must be shown so that a profile recreated from the elevations on the FIRM will match the FIS profiles within one half of one foot. Completeness_Report: Data contained in the DFIRM Database files reflect the content of the source materials. Features may have been eliminated or generalized on the source graphic, due to scale and legibility constraints. With new mapping, FEMA plans to maintain full detail in the spatial data it produces. However, older information is often transferred from existing maps where some generalization has taken place. Flood risk data are developed for communities participating in the NFIP for use in insurance rating and for floodplain management. Flood hazard areas are determined using statistical analyses of records of river flow, storm tides, and rainfall; information obtained through consultation with the communities; floodplain topographic surveys; and hydrological and hydraulic analysis. Both detailed and approximate analyses are employed. Generally, detailed analyses are used to generate flood risk data only for developed or developing areas of communities. For areas where little or no development is expected to occur, FEMA uses approximate analyses to generate flood risk data. Typically, only drainage areas that are greater than one square mile are studied. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: The DFIRM Database consists of countywide vector files and associated attributes produced in conjunction with the hardcopy FEMA FIRM. The published effective FIRM and DFIRM are issued as the official designation of the SFHAs. As such they are adopted by local communities and form the basis for administration of the NFIP. For these purposes they are authoritative. Provisions exist in the regulations for public review, appeals and corrections of the flood risk information shown to better match real world conditions. As with any engineering analysis of this type, variation from the estimated flood heights and floodplain boundaries is possible. Details of FEMA's requirements for the FISs and flood mapping process that produces these data are available in the Guidelines and Specifications for Flood Hazard Mapping Partners. Horizontal accuracy was tested by manual comparison of source graphics with hardcopy plots and a symbolized display on an interactive computer graphic system. Independent quality control testing of FEMA's DFIRM database was also performed. Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: The DFIRM Database consists of countywide vector files and associated attributes produced in conjunction with the hardcopy FEMA FIRM. The published effective FIRM and DFIRM maps are issued as the official designation of the SFHAs. As such they are adopted by local communities and form the basis for administration of the NFIP. For these purposes they are authoritative. Provisions exist in the regulations for public review, appeals and corrections of the flood risk information shown to better match real world conditions. As with any engineering analysis of this type, variation from the estimated flood heights and floodplain boundaries is possible. Details of FEMA's requirements for the FISs and flood mapping process that produces these data are available in the Guidelines and Specifications for Flood Hazard Mapping Partners. Vertical accuracy was tested by manual comparison of source graphics with hardcopy plots and a symbolized display on an interactive computer graphic system. Independent quality control testing of FEMA's DFIRM database was also performed. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: U.S. Geological Survey Publication_Date: 1998 Title: Digital Orthophoto Quadrangle Geospatial_Data_Presentation_Form: Remote sensing image Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Other_Citation_Details: The digital orthophoto quadrangle (DOQ) is a 1-meter ground resolution, quarter-quadrangle (3.75-minutes of latitude by 3.75-minutes of longitude) image cast on the Universal Transverse Mercator Projection (UTM) on the North American Datum of 1983 (NAD83). The imagery is based on panchromatic black and white (or color infra-red) NAPP or NAPP-like photography. Source_Scale_Denominator: 12,000 Type_of_Source_Media: CD-ROM Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1998 Source_Currentness_Reference: Ground conditions Source_Citation_Abbreviation: DOQ1 Source_Contribution: Location of roads, railroads, bridges, streams, and other physical features. Source_Information: Source_Citation: Citation_Information: Originator: Federal Emergency Management Agency Publication_Date: 20050517 Title: Flood Insurance Study Geospatial_Data_Presentation_Form: Map and report Publication_Information: Publication_Place: Washington, D.C. Publisher: Federal Emergency Management Agency Other_Citation_Details: The FIS and FIRM are the basis for floodplain management, mitigation, and insurance activities for the National Flood Insurance Program (NFIP). This DFIRM includes data previously published by FEMA in the following Flood Insurance Studies: Town of Atkinson, NH 19930402; Town of Auburn, NH 19860402; Town of Brentwood, NH 20000504; Town of Candia, NH 19761119; Town of Chester, NH 19750221; Town of Danville, NH 19750117; Town of Deerfield, NH 19761112; Town of Derry, NH 19810415; Town of East Kingston, NH 19860402; Town of Epping, NH 19820415; Town of Exeter, NH 19830517; Town of Fremont, NH 19890619; Town of Greenland, NH 19890517; Town of Hampstead, NH 19930616; Town of Hampton, NH 19860703; Town of Hampton Falls, NH 19820415; Town of Kensington, NH 19770906; Town of Kingston, NH 19920415; Town of Londonderry, NH 19801105; Town of New Castle, NH 19860805; Town of Newfields, NH 19890605; Town of Newington, NH 19750221; Town of Newmarket, NH 19910502; Town of Newton, NH (never mapped); Town of North Hampton, NH 19860603; Town of Northwood, NH 19870102; Town of Nottingham, NH 19860402; Town of Plaistow, NH 19810415; City of Portsmouth, NH 19820517; Town of Raymond, NH 19950502; Town of Rye, NH 19860617; Town of Salem, NH 19980406; Town of Sandown, NH 19750103; Town of Seabrook, NH 19860617; Seabrook Beach (Village District), NH 19860805; Town of South Hampton, NH 19920715; Town of Stratham, NH 19890517; and Town of Windham, NH 19891103. FEMA has updated the FIS to include restudy information. The restudy information includes: the incorporated communities within Rockingham County in a countywide FIS. Information on the authority and acknowledgments for each jurisdiction included in this countywide FIS, as compiled from their previously printed FIS reports, is shown below. Atkinson, Town of: the hydrologic and hydraulic analyses for the FIS report dated April 2, 1993, were prepared by the U.S. Geological Survey (USGS) for the Federal Emergency Management Agency (FEMA), under Inter-Agency Agreement No. EMW-88-E-2738, Project Order No. 4. That work was completed in August 1991. The hydrologic and hydraulic analyses for Island Pond were taken from the FIS for the Town of Derry (FEMA, 1981). The hydrologic and hydraulic analyses for Bryant Brook were taken from the FIS for the Town of Plaistow (FEMA, April 1981). Brentwood, Town of: the hydrologic and hydraulic analyses for the FIS report dated October 15, 1980, were prepared by the Soil Conservation Service (SCS) for the Federal Insurance Administration (FIA), under Inter-Agency Agreement No. IAA-H-17-78. That work was completed in May 1979. The hydrologic and hydraulic analyses for the FIS report dated May 4, 2000, were prepared by the USGS for FEMA, under Inter-Agency Agreement No. EMW-97-1A-0155, Project Order No. 1. That work was completed in June 1998. Derry, Town of: the hydrologic and hydraulic analyses for the FIS report dated April 15, 1980, were prepared by Anderson-Nichols and Company, Inc., for the FIA, under Contract No. H-3989. That work was completed in March 1978. Epping, Town of: the hydrologic and hydraulic analyses for the FIS report dated October 15, 1981, were performed by the SCS for FEMA, under Inter-Agency Agreement No. IAA-H-17-78, Project Order No. 15. That work was completed in September 1979. Exeter, Town of: the hydrologic and hydraulic analyses for the FIS report dated November 17, 1981, were prepared by Stone & Webster Engineering Corporation for FEMA, under Contract No. H-4772. That work was completed in May 1980. Fremont, Town of: the hydrologic and hydraulic analyses for the FIS report dated June 19, 1989, represent a revision of the original analyses prepared by the SCS for FEMA, under Inter-Agency Agreement No. IAA-H-17-78, Project Order No. 15. The work for the original analyses were completed in May 1979. The hydrologic and hydraulic analyses for Spruce Swamp were prepared by Dewberry & Davis LLC, under agreement with FEMA. That work was completed in June 1988. Greenland, Town of: the hydrologic and hydraulic analyses for the FIS report dated May 17, 1989, were performed by the SCS for FEMA, under Inter-Agency Agreement No. EMW-86-E-2225, Project Order No. 01. That work was completed in September 1987. Hampstead, Town of: the hydrologic and hydraulic analyses for the FIS report dated June 16, 1993, were prepared by the USGS for FEMA, under Inter-Agency Agreement No. EMW-88-E-2738, Project Order No. 4. That work was completed in August 1991. The flooding information for Island Pond was taken from the FIS for the Town of Derry (FEMA, 1981). Hampton, Town of: the hydrologic and hydraulic analyses for the FIS report dated July 3, 1986, were prepared by Stone & Webster Engineering Corporation for FEMA, under Contract No. H-4772. That work was completed in January 1984. Hampton Falls, Town of: the hydrologic and hydraulic analyses for the FIS report dated October 15, 1981, were prepared by Stone & Webster Engineering Corporation for FEMA, under Contract No. H-4772. That work was completed in April 1980. Kingston, Town of: the hydrologic and hydraulic analyses for the FIS report dated April 15, 1992, were prepared by the USGS for FEMA, under Inter-Agency Agreement No. EMW-87-E-2548, Project Order No. 1A. That work was completed in July 1989. Londonderry, Town of: the hydrologic and hydraulic analyses for the FIS report dated May 5, 1980, were prepared by Anderson-Nichols & Company, Inc., for the FIA, under Contract No. H-3989. That work was completed in March 1978. New Castle, Town of: the hydrologic and hydraulic analyses for the FIS report dated August 5, 1986, were prepared by Stone & Webster Engineering Corporation for FEMA, under Contract No. H-4772. That work was completed in April 1984. Newfields, Town of: the hydrologic and hydraulic analyses for the FIS report dated June 5, 1989, were prepared by the SCS for FEMA, under Inter-Agency Agreement No. EMW-86-E-2225, Project Order No. 01. That work was completed in September 1987. Newmarket, Town of: the hydrologic and hydraulic analyses for the FIS report dated May 2, 1991, were prepared by the USGS for FEMA, under Inter-Agency Agreement No. EMW-85-E-1823, Project Order No. 20. That work was completed in August 1989. North Hampton, Town of: the hydrologic and hydraulic analyses for the FIS report dated June 3, 1986, were prepared by Stone & Webster Engineering Corporation for FEMA, under Contract No. H-4772. That work was completed in February 1984. Plaistow, Town of: the hydrologic and hydraulic analyses for the FIS report dated October 15, 1980, were prepared by Anderson-Nichols & Company, Inc., for the FIA, under Contract No. H-4589. Approximate flood boundaries for portions of Seaver Brook and several unnamed streams and swampy areas were determined in August 1976, by Michael Baker, Jr. Inc., under contract to the FIA. That work was completed in October 1978. Portsmouth, City of: the hydrologic and hydraulic analyses for the FIS report dated November 17, 1981, were prepared by Stone & Webster Engineering Corporation for FEMA, under Contract No. H-4772. That work was completed in April 1980. Raymond, Town of: the hydrologic and hydraulic analyses for the FIS report dated October 15, 1981, were prepared by the SCS for FEMA, under Inter-Agency Agreement No. IAA-H-17-78. That work was completed in September 1979. The hydrologic and hydraulic analyses for the FIS report dated April 15, 1992, were prepared by Rivers Engineering Corporation for FEMA, under Contract No. EMW-89-C-2821, Project Order No. R89508. That work was completed October 1989. The hydrologic and hydraulic analyses for the FIS report dated May 2, 1995, were prepared by Roald Haestad, Inc., for FEMA, under Contract No. EMW-90-C-3126. That work was completed in March 1993. Rye, Town of: the hydrologic and hydraulic analyses for the FIS report dated June 17, 1986, were prepared by Stone & Webster Engineering Corporation for FEMA, under Contract No. H-4772. That work was completed in March 1984. Salem, Town of: the hydrologic and hydraulic analyses for the December 1978 FIS report and June 15, 1979, FIRM (hereinafter referred to as the 1979 FIS), were prepared by the U.S. Army Corps of Engineers (USACE), New England District, for the FIA, under Inter-Agency Agreement No. 1AA-H-7-76, Project Order No. 24. That work was completed in August 1977. The hydrologic and hydraulic analyses for the FIS report dated April 6, 1998 were prepared by the U.S. Department of Agriculture, Natural Resources Conservation Service (NRCS), for FEMA, under Contract No. EMW-94-E-4437. That work was completed in September 1995. Seabrook, Town of: the hydrologic and hydraulic analyses for the FIS report dated June 17, 1986, were prepared by Stone & Webster Engineering Corporation for FEMA, under Contract No. H-4772. That work was completed in December 1983. Seabrook Beach Village District: the hydrologic and hydraulic analyses for the FIS report dated August 5, 1986, were performed during the preparation of the FIS for the Town of Seabrook by Stone & Webster Engineering Corporation for FEMA, under Contract No. H-4772. the Town of Seabrook study was completed in December 1983. South Hampton, Town of: the hydrologic and hydraulic analyses for the FIS report dated July 15, 1992, were prepared by the USGS for FEMA, under Inter-Agency Agreement No. EMW-89-E-2997, Project Order No. 5. That work was completed in September 1990. Stratham, Town of: the hydrologic and hydraulic analyses for the FIS report dated May 17, 1989, were prepared by the SCS for FEMA, under Inter-Agency Agreement No. EMW-86-E-2225, Project Order No. 1. That work was completed in September 1987. Windham, Town of: the hydrologic and hydraulic analyses for the FIS report dated were performed by Anderson-Nichols & Company, Inc., for the FIA, under Contract No. H-3989. That work was completed in March 1978. The authority and acknowledgments for the Towns of Auburn, Candia, Chester, Danville, Deerfield, East Kingston, Kensington, Newington, Northwood, Nottingham, and Sandown are not available because no FIS reports were ever published for those communities. The digital base mapping information was derived from USGS Digital Orthophoto Quadrangles (DOQs) produced at a scale of 1:12,000 from photography dated 1998 or later. The digital FIRM was produced using New Hampshire State Plane Coordinate system, FIPS Zone 2800, referenced to the North American Datum of 1983 (NAD 83), GRS80 spheroid. This FIS covers the geographic area of Rockingham County, New Hampshire. All or portions of the following flooding sources were studied by detailed methods. Limits of detailed study are indicated on the Flood Profiles and on the FIRM: Adams Pond, Atlantic Ocean, Beaver Brook, Beaver Lake, Black Brook, Bryant Brook, Cohas Brook, Country Pond, Cunningham Brook, Drew Brook, Dudley Brook, Exeter River, Flatrock Brook, Golden Brook, Grassy Brook, Great Bay, Great Pond, Hornes Brook, Hill Brook, Hog Hill Brook, Hidden Valley Brook, Island Pond, Kelly Brook, Lamprey River, Little Cohas Brook, Little River No. 1, Little River No. 2, Little River No. 3, Lower Ballard Pond, Lower Beaver Lake, Meadow Pond, Nesenkeag Brook, Nudds Canal, Pickering Brook, Piscassic River, Piscataqua River, Policy Brook, Porcupine Brook, Porcupine Brook Tributary, Powwow Pond, Powwow River (Downstream Reach), Powwow River (Upstream Reach), Shields Brook, Shop Pond, Spicket River, Squamscott River, Taylor Brook (including Ballard Pond), Taylor River, Tide Mill Creek, Tributary C to Beaver Brook, Tributary E to Beaver Lake, Tributary E to Little Cohas Brook, Tributary F to Beaver Lake, Tributary G to Beaver Brook, Tributary H to Drew Brook, Tributary H to Nesenkeag Brook, Tributary J to Black Brook, Tributary O to Beaver Brook, Tuxbury Pond, Upper Ballard Pond, Upper Beaver Brook, Wash Pond, Wash Pond Tributary, Winnicut River, West Channel Policy Branch, World End Brook, and World End Pond. This FIS also incorporates the determinations of letters issued by FEMA resulting in map changes (Letter of Map Revision [LOMR], Letter of Map Revision - based on Fill [LOMR-F], and Letter of Map Amendment [LOMA]. The following list shows communities affected by "Letters of Map Change." The format will depict the community, flooding source(s) / project identifier, effective date and type of letter: Portsmouth, City of: Pickering Brook/Ocean Road Development Corporation Project; October 6, 1999; LOMR. Rye, Town of: Atlantic Ocean/Brown Property shore protection project; February 15, 2001; LOMR. Salem, Town of: West Channel Policy Brook/ Powers Builders property; September 15, 1999; LOMR. Epping, Town of: Lamprey River/ downstream of Prescott Road bridge; September 7, 1993; BADL. The areas studied by detailed methods were selected with priority given to all known flood hazard areas and areas of projected development and proposed construction. Numerous flooding sources in the county were studied by approximate methods. Approximate analyses were used to study those areas having a low development potential or minimal flood hazards. The scope and methods of study were proposed to, and agreed upon by, FEMA and Rockingham County. For this study, several areas of approximate flooding were extended in order to match the approximate flooding across community corporate limits within Rockingham County and across the county boundary from contiguous counties. The delineation involved the use of topographic maps at a scale of 1:24,000 and contour intervals of 10 and 20 feet (U.S. Department of Interior, 1966, et cetera; 1950, et cetera.). Three Little Rivers exist in Rockingham County. For clarification purposes, they have been renamed in the FIS as follows: Little River in the Town of Exeter is Little River No. 1; Little River in the Town of North Hampton is Little River No. 2; Little River in the Town of Plaistow is Little River No. 3. In addition, Tributary D in the Town of Londonderry has been renamed in the FIS as Tributary O to Beaver Brook. Source_Scale_Denominator: 2,400 4,800 6,000 9,600 12,000 24,000 Type_of_Source_Media: Paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 20050517 Source_Currentness_Reference: FIS Effective dates Source_Citation_Abbreviation: FIS1 Source_Contribution: Spatial and attribute information for political entities, cross sections, floodplain information, BFEs, station start descriptions, general structures, and some feature names. Source_Information: Source_Citation: Citation_Information: Originator: Federal Emergency Management Agency Publication_Date: 20050517 Title: ROCKINGHAM COUNTY, NEW HAMPSHIRE, Digital Flood Insurance Rate Map Geospatial_Data_Presentation_Form: Vector digital data Publication_Information: Publication_Place: Washington, D.C. Publisher: Federal Emergency Management Agency Other_Citation_Details: Grid of FIRM panels created for this Flood Insurance Study. Source_Scale_Denominator: 6,000 12,000 Type_of_Source_Media: Digitized Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 20050517 Source_Currentness_Reference: Effective date Source_Citation_Abbreviation: STUDY1 Source_Contribution: Grid of DFIRM panels. Source_Information: Source_Citation: Citation_Information: Originator: National Geodetic Survey Publication_Date: 2005 Title: Geodetic bench mark positions and descriptions Geospatial_Data_Presentation_Form: Vector digital data Publication_Information: Publication_Place: Silver Spring, MD Publisher: National Geodetic Survey Other_Citation_Details: The National Geodetic Survey (NGS) serves as the Nation's depository for geodetic data in the National Spatial Reference System. These geodetic data include bench marks and other control points that provide the base of reference for latitude, longitude, height, scale, orientation, and gravity measurements used throughout the United States. Source_Scale_Denominator: 24,000 Type_of_Source_Media: On line Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2005 Source_Currentness_Reference: Publication date Source_Citation_Abbreviation: NGS1 Source_Contribution: National Geodetic Survey reference points (bench marks). Source_Information: Source_Citation: Citation_Information: Originator: Federal Emergency Management Agency Publication_Date: 20050517 Title: ROCKINGHAM COUNTY, NEW HAMPSHIRE, Digital Flood Insurance Rate Map Geospatial_Data_Presentation_Form: Vector digital data Publication_Information: Publication_Place: Washington, D.C. Publisher: Federal Emergency Management Agency Other_Citation_Details: Base map surface water features and roads digitized from U.S. Geological Survey Digital Orthophoto Quadrangles. Source_Scale_Denominator: 12,000 Type_of_Source_Media: Digitized Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 20050517 Source_Currentness_Reference: Effective date Source_Citation_Abbreviation: STUDY2 Source_Contribution: Base map surface water features and roads. Source_Information: Source_Citation: Citation_Information: Originator: U.S. Geological Survey Publication_Date: 1999 Title: 7.5-Minute Quadrangle Grid Geospatial_Data_Presentation_Form: Vector digital data Publication_Information: Publication_Place: Redlands, CA Publisher: ESRI Other_Citation_Details: Grid of USGS 7.5-Minute Series Topographic Maps. Source_Scale_Denominator: 24,000 Type_of_Source_Media: CD-ROM Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1999 Source_Currentness_Reference: Publication date Source_Citation_Abbreviation: USGS1 Source_Contribution: Grid of USGS 7.5-Minute Series Topographic Maps. Process_Step: Process_Description: The DFIRM Database is compiled in conjunction with the hardcopy FIRM and the final FIS report. The specifics of the hydrologic and hydraulic analyses performed are detailed in the FIS report. The results of these studies are submitted in digital format to FEMA. These data and unrevised data from effective FIRMs are compiled onto the base map used for DFIRM publication and checked for accuracy and compliance with FEMA standards. Source_Used_Citation_Abbreviation: DOQ1, FIS1, STUDY1, NGS1, STUDY2, USGS1 Process_Date: 20050517 Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Vector Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: Point SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: String SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains 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 Lambert_Conformal_Conic: Standard_Parallel: Longitude_of_Central_Meridian: -71.6666666666667 Latitude_of_Projection_Origin: 42.5 False_Easting: 984250 False_Northing: 0 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: Coordinate pair Coordinate_Representation: Abscissa_Resolution: 0.000512 Ordinate_Resolution: 0.000512 Planar_Distance_Units: Feet Geodetic_Model: Horizontal_Datum_Name: NAD83 Ellipsoid_Name: GRS_1980 Semi-major_Axis: 6378137.0 Denominator_of_Flattening_Ratio: 298.26 Vertical_Coordinate_System_Definition: Altitude_System_Definition: Altitude_Datum_Name: NGVD29 Altitude_Resolution: 0.03 Altitude_Distance_Units: feet Altitude_Encoding_Method: Attribute values Entity_and_Attribute_Information: Overview_Description: Entity_and_Attribute_Overview: The DFIRM Database is made up of several data themes containing both spatial and attribute information. These data together represent the current flood risk for the subject area as identified by FEMA. The attribute tables include SFHA locations, flood zone designations, BFEs, political entities, cross-section locations, FIRM panel information, and other data related to the NFIP. Entity_and_Attribute_Detail_Citation: Appendix L of FEMA's Guidelines and Specifications for FEMA Flood Hazard Mapping Partners contains a detailed description of each attribute code and a reference to other relevant information. The following tables are included in this data set: l_comm_info l_stn_start study_info s_bfe s_base_index s_firm_pan s_fld_haz_ar s_fld_haz_ln s_gen_struct s_label_ld s_perm_bmk s_pol_ar s_pol_ln s_quad_index s_wtr_ln s_xs s_label_pt Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: Complex Systems Research Center Contact_Person: GRANIT Database Manager Contact_Address: Address_Type: mailing and physical address Address: Morse Hall, University of New Hampshire City: Durham State_or_Province: NH Postal_Code: 03824 Country: USA Contact_Voice_Telephone: (603) 862-1792 Contact_Facsimile_Telephone: (603) 862-0188 Contact_Electronic_Mail_Address: granit@unh.edu Contact_Instructions: Printed FIRMs that match this data set are available from GRANIT, cited above. Distribution_Liability: Digital data in NH GRANIT represent the efforts of the contributing agencies to record information from the cited source materials. Complex Systems Research Center (CSRC), under contract to the NH Office of Energy and Planning (OEP), and in consultation with cooperating agencies, maintains a continuing program to identify and correct errors in these data. OEP, CSRC, and the cooperating agencies make no claim as to the validity or reliability or to any implied uses of these data. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: ESRI personal geodatabase Format_Version_Number: 1 Digital_Transfer_Option: Offline_Option: Offline_Media: CD-ROM Recording_Format: ISO 9600 Fees: Contact Distributor Metadata_Reference_Information: Metadata_Date: 20050421 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: Federal Emergency Management Agency Contact_Position: Federal Insurance and Mitigation Administration Contact_Address: Address_Type: mailing address Address: 500 C Street, S.W. City: Washington State_or_Province: District of Columbia Postal_Code: 20472 Country: USA Contact_Voice_Telephone: 1-800-358-9616 Contact_Electronic_Mail_Address: www.fema.gov/msc Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998