STANDARD DFIRM DATABASE, FORT PECK ASSINIBOINE AND SIOUX TRIBES, MONTANA

Identification_Information: 
Citation: 
Citation_Information: 
Originator: Federal Emergency Management Agency
Publication_Date: 20040930
Title: DIGITAL FLOOD INSURANCE RATE MAP DATABASE, FORT PECK 
ASSINIBOINE AND SIOUX TRIBES, MONTANA
Geospatial_Data_Presentation_Form: Vector Digital Data 
Publication_Information: 
Publication_Place: Washington, DC
Publisher: Federal Emergency Management Agency
Other_Citation_Details: Metadata_File_Name: 300187_20040930_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: 20040930
Currentness_Reference:  FIRM and FIS effective date
Status: 
Progress: Complete
Maintenance_and_Update_Frequency: Irregular
Spatial_Domain: 
Bounding_Coordinates: 
West_Bounding_Coordinate: -107.98
East_Bounding_Coordinate: -103.01
North_Bounding_Coordinate: 49.65
South_Bounding_Coordinate: 47.105
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: FORT PECK ASSINIBOINE AND SIOUX TRIBES
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: 20040930
Title: Flood Insurance Rate Map, FORT PECK ASSINIBOINE AND SIOUX TRIBES, 
MONTANA
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: 20040930
Title: Flood Insurance Study, FORT PECK ASSINIBOINE AND SIOUX TRIBES, 
MONTANA
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: 20040930
Title: Raster DFIRM, FORT PECK ASSINIBOINE AND SIOUX TRIBES, MONTANA
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 community 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 community 
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 community 
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: 20040930
Title: Flood Insurance Study, FORT PECK ASSINIBOINE AND SIOUX 
TRIBES, MONTANA
Geospatial_Data_Presentation_Form: map
Publication_Information: 
Publication_Place: Washington, DC
Publisher: Federal Emergency Management Agency
Other_Citation_Details:  The hydrologic and hydraulic analyses for all the 
streams studied were performed by the U.S. Army Corps of Engineers 
(USACE), Omaha District, for the Federal Emergency Agency (FEMA), 
under Inter-Agency Agreement EMW-98-IA-0176, Project Order Number 2.
Source_Scale_Denominator: 12,000
Type_of_Source_Media: paper
Source_Time_Period_of_Content: 
Time_Period_Information: 
Single_Date/Time: 
Calendar_Date: 20040930
Source_Currentness_Reference: effective date
Source_Citation_Abbreviation: STUDY1
Source_Contribution:  Spatial and attribute information for floodplain widths, 
BFEs, cross sections, general structures, and floodplain location.
Source_Information: 
Source_Citation: 
Citation_Information: 
Originator: U.S. Geological Survey
Publication_Date: 1989
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: 1989
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: Fort Peck Assiniboine and Sioux Tribes
Publication_Date: 2002
Title: Digital Political Boundaries
Geospatial_Data_Presentation_Form: digital vector data
Publication_Information: 
Publication_Place: Fort Peck Assiniboine and Sioux Tribes, MT
Publisher: Fort Peck Assiniboine and Sioux Tribes
Other_Citation_Details:  Digital vector roads  
Source_Scale_Denominator: 12,000
Type_of_Source_Media: Electronic Submission
Source_Time_Period_of_Content: 
Time_Period_Information: 
Single_Date/Time: 
Calendar_Date: 2002
Source_Currentness_Reference: publication date
Source_Citation_Abbreviation: BASE2
Source_Contribution:  Spatial and attribute information for roads
Source_Information: 
Source_Citation: 
Citation_Information: 
Originator: U.S. Geological Survey
Publication_Date: 20040930
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, railroad, corporate limits, and water 
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: 1989
Source_Currentness_Reference: ground conditions
Source_Citation_Abbreviation: BASE3
Source_Contribution:  Spatial and attribute information for PLSS, railroad, 
corporate limits, and water features
 Source_Information: 
Source_Citation: 
Citation_Information: 
Originator: National Geodetic Survey
Publication_Date: 2002
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: CD-ROM
Source_Time_Period_of_Content: 
Time_Period_Information: 
Single_Date/Time: 
Calendar_Date: 2002
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: 20040930
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: 13
Transverse_Mercator: 
Scale_Factor_at_Central_Meridian: 0.9996
Longitude_of_Central_Meridian: -105.0
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: 0.000914
Ordinate_Resolution: 0.000914
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_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: 20040930
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

