id,agency_id,docket_id,title,document_type,subtype,posted_date,posted_year,posted_month,comment_start_date,comment_end_date,last_modified,fr_doc_num,open_for_comment,withdrawn,object_id FRA-1999-5104-0031,FRA,FRA-1999-5104,U.S. DOT/FRA - Acknowledgement Letter (Association of American Railroads) Flange Bearing Frog Crossing Diamonds,Other,Acknowledgement Letter/Receipt,2012-10-18T04:00:00Z,2012,10,2012-10-18T04:00:00Z,,2024-11-12T05:06:23Z,,1,0,0900006481132b4e FRA-1999-5104-0030,FRA,FRA-1999-5104,Association of American Railroads - Flange Bearing Frog Update Letter,Other,Letter(s),2012-10-18T04:00:00Z,2012,10,2012-10-18T04:00:00Z,,2024-11-12T05:06:22Z,,1,0,0900006481132b36 FRA-1999-5104-0029,FRA,FRA-1999-5104,AAR - Update Letter,Other,Letter(s),2012-04-10T04:00:00Z,2012,4,2012-04-10T04:00:00Z,,2024-11-07T22:36:26Z,,1,0,0900006480feacef FRA-1999-5104-0027,FRA,FRA-1999-5104,AAR - December Supplement,Other,Letter(s),2012-01-05T05:00:00Z,2012,1,2012-01-05T05:00:00Z,,2024-11-08T03:46:58Z,,1,0,0900006480f8e21e FRA-1999-5104-0028,FRA,FRA-1999-5104,U.S. DOT/FRA - Acknowledgement Letter,Other,Acknowledgement Letter/Receipt,2012-01-05T05:00:00Z,2012,1,2012-01-05T05:00:00Z,,2024-11-08T03:46:58Z,,1,0,0900006480f8e223