STANDARD DFIRM DATABASE, BLAINE COUNTY, MONTANA AND ALL JURISDICTIONS

Identification_Information: 
Citation: 
    Citation_Information: 
    Originator: Federal Emergency Management Agency
    Publication_Date: 20060920
    Title: DIGITAL FLOOD INSURANCE RATE MAP DATABASE, BLAINE COUNTY, MONTANA AND ALL JURISDICTIONS
    Geospatial_Data_Presentation_Form: Vector Digital Data 
    Publication_Information: 
    Publication_Place: Washington, DC
    Publisher: Federal Emergency Management Agency
    Other_Citation_Details: Metadata_File_Name: 30005C_20060920_metadata.txt 
    Online Linkage: www.fema.gov/msc
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 file is georeferenced to earth's surface using the UTM projection and coordinate system.  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: 20060920
    Currentness_Reference:  FIRM and FIS effective date
Status: 
    Progress: Complete
    Maintenance_and_Update_Frequency: Irregular
Spatial_Domain: 
    Bounding_Coordinates: 
    West_Bounding_Coordinate: -110.99
    East_Bounding_Coordinate: -106.76
    North_Bounding_Coordinate: 50.02
    South_Bounding_Coordinate: 46.73
Keywords: 
    Theme: 
    Theme_Keyword_Thesaurus: None
    Theme_Keyword: FEMA Flood Hazard Zone
    Theme_Keyword: DFIRM Database
    Theme_Keyword: DFIRM
    Theme_Keyword: Special Flood Hazard Area
    Theme_Keyword: Digital Flood Insurance Rate Map
    Theme_Keyword: NFIP
    Theme_Keyword: Base Flood Elevation
    Theme_Keyword: SFHA
    Theme_Keyword: Flood Insurance Rate Map
    Theme_Keyword: FIRM
    Theme_Keyword: Floodway
       Place:
    Place_Keyword_Thesaurus: None
    Place_Keyword: BLAINE COUNTY
    Place_Keyword: MONTANA
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 match 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
Native_Data_Set_Environment:   Original data development environment varies.  Finishing of the data is done using ESRI’s ARC/INFO software.
Cross_Reference: 
    Citation_Information: 
    Originator: Federal Emergency Management Agency
    Publication_Date: 20060920
    Title: Flood Insurance Rate Map, BLAINE COUNTY, MONTANA AND ALL JURISDICTIONS
    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: 20060920
    Title: Flood Insurance Study, BLAINE COUNTY, MONTANA AND ALL JURISDICTIONS
    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: 20060920
    Title: Raster DFIRM, BLAINE COUNTY, MONTANA AND ALL JURISDICTIONS
    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: Federal Emergency Management Agency
    Publication_Date: 20060920
Title: Flood Insurance Study, BLAINE COUNTY, MONTANA AND ALL JURISDICTIONS
    Geospatial_Data_Presentation_Form: map
       Publication_Information: 
       Publication_Place: Washington, DC
       Publisher: Federal Emergency Management Agency
       Other_Citation_Details:  The original hydrologic and hydraulic analyses affecting the Cities of Chinook and Harlem and the unincorporated areas of Blaine County were performed by Morrison-Maierle, Inc., Consulting Engineers, Helena, Montana, for the Federal Emergency Management Agency (FEMA), under Contract No. EMW-R-1182.  This study was completed in March 1985.  The revised hydrologic and hydraulic analyses affecting the Fort Belknap Indian Reservation were performed by the U.S. Army Corps of Engineers (USACE), Omaha District, for FEMA, under Contract No. EMW-98-IA-0176, Project Order No. 6.  This restudy was completed in June 2001.  The USACE study for Milk River was revised by FEMA in June 2004 to incorporate revised hydrologic and hydraulic information on the Milk River.
       Source_Scale_Denominator: 12,000
       Type_of_Source_Media: paper
Source_Time_Period_of_Content: 
    Time_Period_Information: 
    Single_Date/Time: 
    Calendar_Date: 20060920
    Source_Currentness_Reference: effective date
Source_Citation_Abbreviation: STUDY1
    Source_Contribution:  Spatial and attribute information for floodplain widths, BFEs, cross sections, FIRM panels, drainage lines, general structures, and floodplain location.
    Source_Information: 
    Source_Citation: 
    Citation_Information: 
    Originator: U.S. Geological Survey
    Publication_Date: 19980309
    Title:   USGS 7.5-Minute Series Topographic Maps 
    Geospatial_Data_Presentation_Form: digital vector data
    Publication_Information: 
    Publication_Place: Reston, VA
    Publisher: U.S. Geological Survey
Other_Citation_Details:  USGS has mapped the county with 1:24,000 scale topographic maps (also referred to as 7.5-minute quadrangles).  The entire county was mapped by the late 1980s.  From the raster topographic maps, a vector index of the USGS topographic maps with its corresponding tile identification number and name was created. 
    Source_Scale_Denominator: 24,000
    Type_of_Source_Media: online
    Source_Time_Period_of_Content: 
    Time_Period_Information: 
    Single_Date/Time: 
    Calendar_Date: 19980309
    Source_Currentness_Reference: publication date
Source_Citation_Abbreviation: BASE1
    Source_Contribution:  Spatial and attribute information for the index of USGS 7.5-Minute Series Topographic Map boundaries.
    Source_Information: 
    Source_Citation: 
    Citation_Information: 
    Originator: Montana Department of Transportation
    Publication_Date: 20001211
Title: roads
    Geospatial_Data_Presentation_Form: digital vector data
    Publication_Information: 
    Publication_Place: Montana Department of Transportation
    Publisher: Montana Department of Transportation
Other_Citation_Details:  Digital vector transportation features and political boundaries.
    Source_Scale_Denominator: 12,000
    Type_of_Source_Media: Electronic Submission
    Source_Time_Period_of_Content: 
    Time_Period_Information: 
    Single_Date/Time: 
    Calendar_Date: 20001211
    Source_Currentness_Reference: publication date
Source_Citation_Abbreviation: BASE2
    Source_Contribution:  Spatial and attribute information for transportation features and political boundaries.
    Source_Information: 
    Source_Citation: 
    Citation_Information: 
    Originator: U.S. Geological Survey
    Publication_Date: 19980309
Title: USGS 7.5-Minute Series Topographic Map Digital Data
    Geospatial_Data_Presentation_Form: digital vector data
    Publication_Information: 
    Publication_Place: Reston, VA
    Publisher: U.S. Geological Survey
Other_Citation_Details:  Vector PLSS and corporate limit features were digitized from the raster USGS 7.5-Minute Topographic Quadrangles (UTM NAD83 projection).    
    Source_Scale_Denominator: 24,000
    Type_of_Source_Media: digital raster data
    Source_Time_Period_of_Content: 
    Time_Period_Information: 
    Single_Date/Time: 
    Calendar_Date: 19980309
    Source_Currentness_Reference: ground conditions
Source_Citation_Abbreviation: BASE3
    Source_Contribution:  Spatial and attribute information for PLSS and corporate limits lines.
    Source_Information: 
    Source_Citation: 
    Citation_Information: 
    Originator: National Geodetic Survey
    Publication_Date: 20020101
    Title:   Permanent Bench Mark Data Sheets 
    Geospatial_Data_Presentation_Form: digital vector data
    Publication_Information: 
    Publication_Place: Silver Spring, MD
    Publisher: National Geodetic Survey
Other_Citation_Details:  Geodetic data comprise the results of geodetic surveys to determine among other things, latitude, longitude, height, scale, and orientation control.  The NGS’ final product is the geodetic data sheet.  Geodetic data sheets are comprehensive summaries of all the published information for a given geodetic reference point, including: the geographic position and/or height based on the current reference datum, condition of the survey mark when it was last visited, a description of where the point is located and how to reach it, and an explanation of the terms used in the data sheet.
    Source_Scale_Denominator: 12,000
    Type_of_Source_Media: http://www.ngs.noaa.gov/cgi-bin/datasheet.prl
    Source_Time_Period_of_Content: 
    Time_Period_Information: 
    Single_Date/Time: 
    Calendar_Date: 20020101
    Source_Currentness_Reference: ground conditions
Source_Citation_Abbreviation: BASE4
    Source_Contribution:  Spatial and attribute information for permanent benchmarks.
    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: STUDY1, BASE1 – BASE4
    Process_Date: 20060920
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
Raster_Object_Information:
    Raster_Object_Type:  Pixel
Spatial_Reference_Information: 
Horizontal_Coordinate_System_Definition: 
    Planar: 
    Grid_Coordinate_System: 
    Grid_Coordinate_System_Name: Universal Transverse Mercator
    Universal_Transverse_Mercator: 
    UTM_Zone_Number: 12
    Transverse_Mercator: 
    Scale_Factor_at_Central_Meridian: 0.9996
    Longitude_of_Central_Meridian: -111
    Latitude_of_Projection_Origin: 0.0
False_Easting: 500000
False_Northing: 0.0
    Planar_Coordinate_Information: 
    Planar_Coordinate_Encoding_Method: Coordinate Pair
    Coordinate_Representation: 
Abscissa_Resolution: 0.000988
Ordinate_Resolution: 0.000988
    Planar_Distance_Units: meters
    Geodetic_Model: 
    Horizontal_Datum_Name: North American Datum 1983
    Ellipsoid_Name:  Geodetic Reference System 80
    Semi-major_Axis: 6378137 
    Denominator_of_Flattening_Ratio: 298.25
Vertical_Coordinate_System_Definition: 
    Altitude_System_Definition: 
    Altitude_Datum_Name: North American Vertical Datum of 1988
    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.
    Entity_and_Attribute_Detail_Citation:  The following tables are included in this data set:
L_Comm_Info
L_Stn_Start
Study_Info
S_bfe
S_firm_pan
S_fld_haz_ar
S_fld_haz_ln
S_gen_struct
S_label_ld
S_label_pt
S_perm_bmk
S_plss_ln
S_pol_ar
S_pol_ln
S_quad_index
S_trnsport_ln
S_wtr_ln
S_xs
Distribution_Information: 
Distributor: 
    Contact_Information: 
    Contact_Organization_Primary: 
    Contact_Organization: FEMA, Map Service Center
Contact_Address: 
Address_Type: mailing address
Address:  P.O. Box 1038
City:  Jessup
State_or_Province: Maryland
Postal_Code:  20794-1038
Country: USA
Contact_Voice_Telephone: 1-800-358-9616
Contact_Electronic_Mail_Address: www.fema.gov/msc
Contact_Instructions:  Data requests must include the full name of the community or county and the FIRM panel number(s) or the 7.5- minute series quadrangle sheet area(s) covered by the request. 
Distribution_Liability:  No warranty expressed or implied is made by FEMA regarding the utility of the data on any other system nor shall the act of distribution constitute any such warranty. FEMA will warrant the delivery of this product in a computer-readable format, and will offer appropriate adjustment of credit when the product is determined unreadable by correctly adjusted computer input peripherals, or when the physical medium is delivered in damaged condition. Requests for adjustment of credit must be made within 90 days from the date of this shipment from the ordering site. 
Standard_Order_Process: 
Non-digital_Form:  Printed DFIRMs that match this data set are available from FEMA at the Map Service Center, cited above. 
    Fees: Contact Distributor
Standard_Order_Process: 
    Digital_Form: 
    Digital_Transfer_Information: 
    Format_Name: ESRI Shapefile 
    Format_Version_Number: 1
    Digital_Transfer_Option: 
    Offline_Option: 
    Offline_Media: CD-ROM
    Recording_Format: ISO 9660
    Digital_Form: 
    Digital_Transfer_Information: 
Format_Name: MapInfo Interchange file (MIF)
Format_Version_Number: 1
    Digital_Transfer_Option: 
    Offline_Option: 
    Offline_Media: CD-ROM
    Recording_Format: ISO 9660 
    Digital_Form: 
    Digital_Transfer_Information: 
Format_Name: ARCE
Format_Version_Number: 1
    Digital_Transfer_Option: 
    Offline_Option: 
Offline_Media: CD-ROM
Recording_Format: ISO 9660
    Fees: Contact Distributor 
Metadata_Reference_Information: 
Metadata_Date: 20060920
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

