General Information Party ID Party Name Party Classification Mailing Address Work Phone Email/Website 552878 Patrick Prososki null 402-544-5210 pgprosos@up.com Related Places Place ID Place Name County Region Place Type Relationship to Party Relationship Start Date Relationship End Date Related Parties Party ID Party Name Party Type Role/Relationship Relationship Start Date Relationship End Date Classification 47784 Union Pacific Railroad Company Omaha Organization Legally Responsible Official 09/03/2015 null Privately-Owned Business Regulatory Measures(non-enforcement) Reg. Measure ID Regulatory Measure Type Region WDID Title Status Program Order No. RM Effective Date RM Termination Date Relationship Relationship Start Date Relationship End Date Violations within the past calendar year Violation ID Occurrence Date Violation Type Violation Description Violation Status Priority Source Facility Name Violated Reg. Meas. ID Violated Reg. Meas. Order No. Linked To Enf. Enforcement Actions Enforcement ID Enforcement Type Enf. Order No. Title Program Effective Date Status Regulatory Measures linked to Related Parties Reg. Measure ID Organization Regulatory Measure Type Program Effective Date Status 457086 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 07/11/2024 Active 456930 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 06/19/2024 Active 456726 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 06/21/2024 Active 456606 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 05/31/2024 Active 456465 Union Pacific Railroad Company Omaha Enrollee - 401 Certification CERFILLEXC 05/08/2024 Active 455875 Union Pacific Railroad Company Omaha Enrollee - 401 Certification CERFILLEXC 02/21/2024 Active 455849 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 04/09/2024 Active 455846 Union Pacific Railroad Company Omaha Enrollee - WDR WDRNONMUNIPRCS 02/26/2024 Active 455317 Union Pacific Railroad Company Omaha Enrollee - 401 Certification CERFILLEXC 01/24/2024 Active 455274 Union Pacific Railroad Company Omaha Enrollee - 401 Certification CERFILLEXC 01/23/2024 Active 452225 Union Pacific Railroad Company Omaha Enrollee - 401 Certification CERFILLEXC 05/24/2023 Active 451865 Union Pacific Railroad Company Omaha Enrollee - 401 Certification CERFILLEXC 03/09/2023 Active 450999 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 03/20/2023 Active 450808 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 02/16/2023 Active 450750 Union Pacific Railroad Company Omaha Enrollee - 401 Certification CERFILLEXC 01/13/2023 Active 450533 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 02/10/2023 Active 450111 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 07/18/2023 Active 449747 Union Pacific Railroad Company Omaha Enrollee - 401 Certification CERFILLEXC 11/29/2022 Active 449746 Union Pacific Railroad Company Omaha Enrollee - 401 Certification CERFILLEXC 11/29/2022 Active 449686 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 11/15/2022 Active 449626 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 05/02/2023 Active 449620 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 11/15/2022 Active 449588 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 01/05/2023 Active 449485 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 11/09/2022 Active 449456 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 12/02/2022 Active 449447 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 11/09/2022 Active 449446 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 11/15/2022 Active 447760 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 12/16/2022 Historical 446650 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 07/10/2023 Active 445950 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 02/15/2022 Active 445185 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 11/22/2021 Historical 441812 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 02/23/2021 Historical 441776 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 02/24/2021 Active 441024 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 02/02/2021 Historical 440020 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 10/27/2020 Historical 439616 Union Pacific Railroad Company Omaha Enrollee - 401 Certification CERFILLEXC 03/11/2021 Historical 438300 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 06/24/2020 Active 438298 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 08/14/2020 Active 438170 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 09/11/2020 Historical 437859 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 09/11/2020 Historical 437389 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 08/20/2020 Historical 436881 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 09/02/2020 Active 436880 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 09/02/2020 Active 436763 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 10/20/2020 Active 436757 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 10/21/2020 Active 436518 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 03/16/2020 Historical 436143 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 03/20/2020 Historical 436141 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 03/20/2020 Historical 435999 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 06/03/2020 Historical 435702 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 04/14/2020 Active 435701 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 05/18/2020 Historical 435698 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 03/12/2020 Active 435491 Union Pacific Railroad Company Omaha Enrollee - Waiver WDRNONMUNIPRCS 11/21/2019 Historical 435227 Union Pacific Railroad Company Omaha Enrollee - 401 Certification CERFILLEXC 11/08/2019 Active 434262 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 04/06/2020 Historical 430341 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 06/14/2019 Historical 430122 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 02/14/2020 Historical 429657 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 08/07/2019 Historical 429040 Union Pacific Railroad Company Omaha Enrollee - 401 Certification CERFILLEXC 02/22/2019 Historical 427778 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 05/24/2019 Active 427164 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 03/11/2019 Historical 425294 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 05/08/2019 Historical 424918 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 01/11/2019 Historical 422254 Union Pacific Railroad Company Omaha Enrollee - NPDES NPDNONMUNIPRCS 06/25/2018 Historical 421222 Union Pacific Railroad Company Omaha Enrollee - 401 Certification CERFILLEXC 06/22/2018 Historical 420339 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 07/02/2018 Historical 419708 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 10/12/2020 Historical 419374 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 06/06/2018 Historical 416820 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 12/05/2017 Historical 416656 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 01/19/2018 Historical 416013 Union Pacific Railroad Company Omaha Enrollee - 401 Certification CERFILLEXC 10/02/2017 Historical 415431 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 09/08/2017 Historical 413988 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 08/25/2017 Historical 413834 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 12/22/2017 Historical 413128 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 07/21/2017 Historical 412928 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 06/30/2017 Historical 411951 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 02/07/2018 Historical 411606 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 11/09/2017 Historical 411571 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 11/09/2017 Historical 407280 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 07/28/2016 Historical 406036 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 08/04/2016 Historical 405596 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 08/17/2016 Historical 405437 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 05/18/2016 Historical 405435 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 05/18/2016 Historical 405075 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 04/08/2016 Historical 404817 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 04/18/2016 Historical 404500 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 03/24/2016 Historical 404324 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 01/28/2016 Historical 404291 Union Pacific Railroad Company Omaha Enrollee - 401 Certification CERFILLEXC 02/17/2016 Historical 403678 Union Pacific Railroad Company Omaha Enrollee - 401 Certification CERFILLEXC 11/18/2015 Historical 403649 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 01/21/2016 Historical 403300 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 11/30/2015 Historical 403138 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 01/04/2016 Historical 402724 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 06/08/2016 Historical 402408 Union Pacific Railroad Company Omaha Enrollee - 401 Certification CERFILLEXC 08/25/2015 Historical 402280 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 08/13/2015 Historical 401416 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 01/19/2017 Historical 400689 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 05/27/2015 Historical 399156 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 08/14/2006 Historical 399149 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 08/14/2006 Historical 399139 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 11/14/2005 Historical 398136 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 12/29/2014 Historical 396415 Union Pacific Railroad Company Omaha Enrollee - WDR CERFILLEXC 01/13/2015 Historical 395054 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 04/10/2014 Historical 394446 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 10/17/2013 Historical 394129 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 04/14/2014 Historical 393569 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 12/30/2013 Historical 393392 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 03/07/2014 Historical 392656 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 07/02/2013 Historical 391372 Union Pacific Railroad Company Omaha Enrollee - 401 Certification CERFILLEXC 07/22/2011 Historical 391236 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 06/06/2012 Historical 390565 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 06/07/2011 Historical 388270 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 10/19/2012 Historical 388146 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 05/03/2012 Historical 388142 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 05/03/2012 Historical 388141 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 05/03/2012 Historical 387118 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 01/14/2012 Historical 386613 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 05/16/2011 Historical 386297 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 10/19/2010 Historical 385678 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 04/27/2012 Historical 385219 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 05/02/2002 Historical 385006 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 07/05/2012 Historical 385005 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 07/05/2012 Historical 384420 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 07/22/2009 Historical 384194 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 05/16/2011 Historical 383334 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 11/10/1997 Historical 383333 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 02/23/1998 Historical 383332 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 02/27/1998 Historical 382884 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 06/22/2010 Historical 382804 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 03/09/2012 Historical 382696 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 03/06/2012 Historical 382695 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 03/06/2012 Historical 382694 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 03/06/2012 Historical 382693 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 03/06/2012 Historical 382692 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 03/06/2012 Historical 382690 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 03/06/2012 Historical 382688 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 03/06/2012 Historical 382685 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 03/06/2012 Historical 382684 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 03/06/2012 Historical 382683 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 03/06/2012 Historical 382672 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 03/06/2012 Historical 382670 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 03/06/2012 Historical 382667 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 03/06/2012 Historical 382666 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 03/06/2012 Historical 382664 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 03/06/2012 Historical 382663 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 03/06/2012 Historical 382662 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 03/06/2012 Historical 382661 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 03/06/2012 Historical 382660 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 03/06/2012 Historical 382659 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 03/06/2012 Historical 382654 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 03/06/2012 Historical 382652 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 03/06/2012 Historical 382014 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 02/02/2012 Historical 382013 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 02/02/2012 Historical 382012 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 02/02/2012 Historical 382008 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 02/02/2012 Historical 382007 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 02/02/2012 Historical 382006 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 02/02/2012 Historical 382004 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 02/02/2012 Historical 382003 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 02/02/2012 Historical 382002 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 02/02/2012 Historical 382001 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 02/02/2012 Historical 382000 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 02/02/2012 Historical 381942 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 02/02/2012 Historical 381939 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 02/02/2012 Historical 380888 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 06/22/2009 Historical 380502 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 10/01/2009 Historical 380389 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 06/03/2009 Historical 380308 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 11/30/2006 Historical 380125 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 04/01/2008 Historical 380124 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 04/01/2008 Historical 379782 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 03/01/2007 Historical 378525 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 06/03/2009 Historical 378067 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 04/06/2011 Historical 377216 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 05/12/2011 Historical 377215 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 05/12/2011 Historical 377103 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 03/01/2011 Historical 377102 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 03/01/2011 Historical 377098 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 03/01/2011 Historical 377096 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 03/01/2011 Historical 377095 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 03/01/2011 Historical 377094 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 03/01/2011 Historical 377090 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 03/01/2011 Historical 377088 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 03/01/2011 Historical 377087 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 03/01/2011 Historical 377086 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 03/01/2011 Historical 377085 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 03/01/2011 Historical 375768 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 09/30/2010 Historical 375083 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 05/28/2008 Historical 374360 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 12/29/2009 Historical 373008 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 04/22/2010 Historical 368911 Union Pacific Railroad Company Omaha Enrollee - NPDES NPDNONMUNIPRCS 07/13/2010 Historical 355664 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 11/17/2008 Historical 340567 Union Pacific Railroad Company Omaha Enrollee - WDR WDRNONMUNIPRCS 03/19/2007 Historical 340546 Union Pacific Railroad Company Omaha Enrollee WDRNONMUNIPRCS 10/20/2006 Historical 325601 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 05/22/2007 Historical 320570 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 03/02/2006 Historical 317498 Union Pacific Railroad Company Omaha Enrollee - 401 Certification CERFILLEXC 06/13/2006 Historical 176051 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 03/21/2005 Historical 173449 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 05/12/2004 Historical 171926 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 09/19/2002 Historical 171836 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 09/19/2002 Historical 171016 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 03/19/2003 Historical 170187 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 09/07/1999 Historical 154161 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 11/06/1998 Historical 154160 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC null Historical 152121 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 01/01/2010 Historical 151435 Union Pacific Railroad Company Omaha 401 Certification CERFILLEXC 07/06/1997 Historical 135082 Union Pacific Railroad Company Omaha NPDES Permit NPDESWW 04/30/1999 Historical 134413 Union Pacific Railroad Company Omaha NPDES Permit NPDESWW 05/21/1993 Historical 133519 Union Pacific Railroad Company Omaha NPDES Permit NPDNONMUNIPRCS 01/26/2005 Historical 133425 Union Pacific Railroad Company Omaha NPDES Permit NPDESWW 06/22/1984 Historical