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Acceptable File Formats


Effective August 4, 2011, Office 2007/2010 4-character file extensions are acceptable file extensions
Application / Description Suffix
Adobe Portable Document Format (Acrobat 4.x or higher) .PDF
Advantica SynerGEE compatible Microsoft Access application MDB file 1 .MDB
Advantica SynerGEE input data set for pipe flow program 1 .PD
Advantica SynerGEE xy coordinate text file 1 .XY
ASCII Comma Separated Value .CSV
ASCII Text Format .TXT
AutoCAD Drawing database 1 .DWG
AutoCAD Drawing Interchange Format .DXF
Bentley Systems Microstation drawing file .DGN
Corel WordPerfect .WPD
ESRI Shape Format (vector format created by the Environmental System Research Institute) main file 1 .SHP
ESRI Shape Format (vector format created by the Environmental System Research Institute) index file 1 .SHX
ESRI Shape Format (vector format created by the Environmental System Research Institute) dBase table 1 .DBF
ESRI Shape Format (vector format created by the Environmental System Research Institute) projection file 1 .PRJ
ESRI ArcGIS auxiliary file 1 .AUX
ESRI ArcGIS external pyramid layer file used for rapid display of raster files 1 .RRD
ESRI ArcMap project file 1 .MXD
ESRI ArcIMS Project file (ArcXML) 1 .AXL
ESRI ArcView spatial bin file for shapefiles 1 .SBN
ESRI ArcView spatial bin index file for shapefiles 1 .SBX
ESRI TIFF world files 1 .TFW
ESRI ArcGIS MrSid (LizardTech) image raster file 1 .SID
ESRI ArcGIS MrSid georeferencing information (world) file 1 .SDW
Extensible Markup Language .XML
FERC Index of Customers tab delimited text files 2 .TAB, .TA1, .TA2, .TA3
General Algebraic Modeling System (GAMS) .GDX
General Algebraic Modeling System (GAMS) .GMS
General Electric Positive Sequence Load Flow (PSLF) simulation .EPC
General Electric Positive Sequence Load Flow (PSLF) output file .LST
Graphic Image Format .GIF
Gregg Engineering WinFlow output file 1 .LIB
Gregg Engineering WinFlow output file 1 .LOG
Gregg Engineering WinFlow output file 1 .NTP
Gregg Engineering WinFlow output file 1 .OVR
Gregg Engineering WinFlow input file 1 .WFP
Gregg Engineering WinTran time-varying schedule file 1 .SCH
Gregg Engineering WinTran output file 1 .WTO
Gregg Engineering WinTran output file 1 .WTS
Joint Photographic Experts Group .JPG
Keyhole Markup Language (xml-based structure for geographic data in an Earth browser such as Google Earth) 1 .KML
Keyhole Markup Language compressed file 1 .KMZ
Lotus .WK1, .WK3, .WK4
Microsoft Media Player 3 .WMV, .WMA
Microsoft Office 2003/2007/2010: Word . DOC, .DOCX
Microsoft Office 2003/2007/2010: Excel .XLS. .XLSX
Microsoft Office 2003/2007/2010: Power Point .PPT, .PPS, .PPTX
Motion Picture Experts Group 3 .MPG
MP3 audio file (mp3) 3 .MP3
Managing and Utilizing System Transmission (MUST) Software 1 .CON, .MON, .SUB, .TRA
PowerWorld Binary file .PWB
PowerWorld Drawing file .PWD
Print file .PRN
RAW Image File (RGB 24-bit Graphics) .RAW
Rich Text Format .RTF
Siemens PTI PSSE Input Device file .IDV
Siemens PTI PSSE output file .OUT
Siemens PTI PSSE output file .DAT
Siemens PTI PSSE raw data .RAW
Siemens PTI PSSE saved case .PTI
Siemens PTI PSSE saved case .SAV
Tagged Image File Format .TIF
Waveform sound (Microsoft Windows) 3 .WAV
Web page file containing Hypertext Markup Language(HTML) markup .HTM
Windows bitmap .BMP
Zip file compressed archive (must not be .exe or self-extracting) .ZIP


[1] A detailed description of the content of the file and instructions for the public on how to obtain resources to view it must be included with the submission in light of National Archives and Records Administration regulations. This file type must only be submitted with Advantica SynerGEE, AutoCAD, ESRI, MUST, WinFlow, or WinTran files.

[2] Should only be submitted when filing FERC Index of Customers.

[3] A detailed description of the content of the file must be included with the submission in accordance with the Americans with Disabilities Act.


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Updated: January 4, 2012