General Information Party ID Party Name Party Classification Mailing Address Work Phone Email/Website 535684 Contra Costa County PWD County Agency 255 Glacier Drive Martinez, CA 94553 925-313-2190(+) null Related Places Place ID Place Name County Region Place Type Relationship to Party Relationship Start Date Relationship End Date 898457 Wildcat Canyon Road Slope Repair Project Contra Costa 2 Dredge/Fill Site Owner 01/06/2025 null 897135 Rodeo Creek Bank Erosion Repair Contra Costa 2 Dredge/Fill Site Owner 10/23/2024 null 897134 Pinole Creek Bank Erosion Repair Contra Costa 2 Dredge/Fill Site Owner 10/23/2024 null 895567 Morgan Territory Road Bridges 5.0, 5.2 Replacement Project Contra Costa 5S Dredge/Fill Site Owner 07/08/2024 null 884751 Contra Costa County Routine Maintenance Program Contra Costa 5S Dredge/Fill Site Owner 12/12/2022 null 878788 Byron Highway Bridge Replacement Project Contra Costa 5S Dredge/Fill Site Owner 01/12/2022 null 877561 Marsh Creek Road Bridge Replacement Project, Bridges #28C-0143 and #28C-0145 Contra Costa 5S Dredge/Fill Site Owner 11/12/2021 null 877432 Walnut and Grayson Creeks Desilting Contra Costa 2 Dredge/Fill Site Owner 11/05/2021 null 872011 Happy Valley Road Contra Costa 2 Dredge/Fill Site Owner 01/28/2021 null 872010 Ferndale Road Contra Costa 2 Dredge/Fill Site Owner 01/28/2021 null 872008 Castro Ranch Road Contra Costa 2 Dredge/Fill Site Owner 01/28/2021 null 871994 Bear Creek Road Contra Costa 2 Dredge/Fill Site Owner 01/28/2021 null 867295 Pinehurst Road Sinkhole And Culvert Repair Project Contra Costa 2 Dredge/Fill Site Owner 06/10/2020 null 864556 Marsh Drive Bridge Replacement Over Walnut Creek Project Contra Costa 2 Dredge/Fill Site Owner 01/30/2020 null 861863 Contra Costa County Routine Maintenance Program manual Contra Costa 2 Dredge/Fill Site Owner 10/08/2019 null 861852 Contra Costa County Routine Maintenance Program Project Contra Costa 5S Dredge/Fill Site Owner 10/07/2019 null 856030 Jersey Island Road Bridge Repair Project Contra Costa 5S Dredge/Fill Site Owner 02/12/2019 null 856010 Sequoia Way Culvert and Roadway Repair Contra Costa 2 Dredge/Fill Site Owner 02/11/2019 null 854414 Lettia Road Storm Drain Desilting Project Contra Costa 2 Dredge/Fill Site Owner 12/17/2018 null 851617 Marsh Drive Bridge (28C-0442) replacemenent Over WC Contra Costa 2 Dredge/Fill Site Owner 10/10/2018 null 848552 Kirker Pass Road Northbound Truck Climbing Lane Contra Costa 2 Dredge/Fill Site Owner 06/27/2018 null 843167 Pinole Valley Road Sinkhole Repair Contra Costa 2 Dredge/Fill Site Owner 12/27/2017 null 841990 Pacheco Boulevard Sidewalk Gap Closure Phase 3 Contra Costa 2 Dredge/Fill Site Owner 12/04/2017 null 841529 Marsh Creek Road Bridge Replacement (Bridge 28C-0141) Project Contra Costa 5S Dredge/Fill Site Owner 11/14/2017 null 835679 Alhambra Valley Road Washout Repair Contra Costa 2 Dredge/Fill Site Owner 06/05/2017 null 835157 Las Trampas Creek Repair At Boulevard Way Bridge Contra Costa 2 Dredge/Fill Site Owner 05/15/2017 null 831755 Morgan Territory Road Bridges 4.30 & 4.40 Scour Repair Project Contra Costa 5S Dredge/Fill Site Owner 01/13/2017 null 825420 Pine Creek Box Culvert Maintenance Contra Costa 2 Dredge/Fill Site Owner 06/14/2016 null 825415 2016 Contra Costa County Routine Flood Control Channel Maintenance Contra Costa 2 Dredge/Fill Site Owner 06/14/2016 null 824667 Clifton Court Road Bridge Repair Project Contra Costa 5S Dredge/Fill Site Owner 05/19/2016 null 822997 Alhambra Valley Road Safety Improvements Contra Costa 2 Dredge/Fill Site Owner 03/16/2016 null 821018 Canal Road Sidewalk and Bike Lane Project Contra Costa 2 Dredge/Fill Site Owner 01/15/2016 null 819090 Lower Walnut Creek Levee And Structure Repair Project Contra Costa 2 Dredge/Fill Site Owner 10/29/2015 null 812874 Marsh Creek Rd. Safety Improvements 2.0 to 2.25 Miles West of Deer Valley Road Contra Costa 5S Dredge/Fill Site Owner 02/04/2015 null 812027 Orwood Road Bridge Replacement Project Contra Costa 5S Dredge/Fill Site Owner 01/05/2015 null 811734 Camino Tassajara Shoulder Widening 1.1 Mile South of Highland Road To 0.3 Mile N Contra Costa 2 Dredge/Fill Site Owner 12/26/2014 null 807729 2014 Contra Costa County Routine Flood Control Maintenance Contra Costa 2 Dredge/Fill Site Owner 07/17/2014 null 806564 Marsh Creek Bridge Scour Repair Contra Costa 5S Dredge/Fill Site Owner 06/02/2014 null 805972 Sycamore Creek Rock And Silt Removal Contra Costa 2 Dredge/Fill Site Owner 05/08/2014 null 803469 Pacifica Avenue Sidewalk Project Contra Costa 2 Dredge/Fill Site Owner 02/04/2014 null 798340 San Pablo Avenue Bridge Replacement At Rodeo Creek Contra Costa 2 Dredge/Fill Site Owner 08/29/2013 null 798046 Vasco Road Safety Improvement Phase 2 Project Contra Costa 5S Dredge/Fill Site Owner 08/20/2013 null 797762 Marsh Creek Detention Facility Bridge Replacement Project Contra Costa 5S Dredge/Fill Site Owner 08/12/2013 null 795555 Marsh Creek Road Shoulder Widening Contra Costa 5S Dredge/Fill Site Owner 06/14/2013 null 794303 Deer Valley Shoulder Widening Project Contra Costa 5S Dredge/Fill Site Owner 05/20/2013 null 793856 Marsh Creek Road Safety Improvements Project Contra Costa 5S Dredge/Fill Site Owner 04/16/2013 null 789754 Deer Valley Road Safety Improvements South of Chadbourne Road Project Contra Costa 5S Dredge/Fill Site None null null 785046 Balfour Road Culvert Repair Contra Costa 5S Dredge/Fill Site Owner 08/13/2012 null 784389 Highway Shoulder Widening Project Contra Costa 5S Dredge/Fill Site None null null Related Parties Party ID Party Name Party Type Role/Relationship Relationship Start Date Relationship End Date Classification 632928 Michelle Cordis Person Legally Responsible Official 05/05/2022 null null 621650 Sandeep Singh Person Employee 01/28/2021 null null 621649 Emma Burckert Person Employee 01/28/2021 null null 621648 Sean O'neil Person Employee 01/28/2021 null null 621647 Shrav Sundaram Person Employee 01/28/2021 null null 621103 Laura Cremin Person Employee 01/04/2021 null null 600663 Allison Knapp Person Legally Responsible Official 11/05/2021 null null 569745 Alex Nattkemper Person Legally Responsible Official 12/04/2017 null null 561179 Mike Carlson Person Legally Responsible Official 06/27/2018 null null 547621 Joe Yee Person Legally Responsible Official 07/17/2014 null null 546355 Brian Balbas Person Legally Responsible Official 05/08/2014 null null 545189 Hillary Heard Person Legally Responsible Official 02/04/2014 null null 542771 Steve Kowalewski Person Legally Responsible Official 08/29/2013 null null 538151 Kimani Birden Person Legally Responsible Official 01/07/2013 null null 535691 Claudia Gemberling Person Legally Responsible Official 07/31/2012 null null 535691 Claudia Gemberling Person Legally Responsible Official 01/07/2012 null null 530212 Julie Bueren Person Legally Responsible Official 08/13/2012 null null 390321 Warren Lai Person Legally Responsible Official 10/10/2018 null null 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 459588 Enrollee - WDR 2 2 CW459588 Enrollee - WDR for Contra Costa County PWD Active CERFILLEXC 2004-0004-DWQ 01/07/2025 null Discharger 01/06/2025 null 457595 401 Certification 5S 5B07CR00263 401 Cert for Contra Costa County PWD - Morgan Territory Road Bridges 5.0, 5.2 Replacement Project Active CERFILLEXC null 08/28/2024 null Discharger 07/08/2024 null 450471 401 Certification 5S 5B07CR00251 401 Cert 5B07CR00251 for Contra Costa County PWD - Contra Costa County Routine Maintenance Program (CCCRMP - PGP) Active CERFILLEXC 5B07CR00251 04/12/2023 null Discharger 12/12/2022 null 446291 401 Certification 5S 5B07CR00243 401 Cert for Contra Costa County PWD - Byron Highway Bridge Replacement Project Active CERFILLEXC null 09/16/2022 null Discharger 01/12/2022 null 445703 401 Certification 5S 5B07CR00242 401 Cert for Contra Costa County PWD - Marsh Creek Road Bridge Replacement Project, Bridges #28C-0143 and #28C-0145 Active CERFILLEXC null 04/21/2022 null Discharger 11/12/2021 null 445630 401 Certification 2 2 CW445630 401 Cert for Contra Costa County PWD Active CERFILLEXC null 12/01/2022 null Discharger 11/05/2021 null 442067 Enrollee - 401 Certification 2 2 CW442067 Enrollee - 401 Certification for Contra Costa County PWD Historical CERFILLEXC 2004-0004-DWQ 06/23/2021 10/17/2021 Discharger 01/28/2021 null 442065 Enrollee - 401 Certification 2 2 CW442065 Enrollee - 401 Certification for Contra Costa County PWD Active CERFILLEXC 2004-0004-DWQ 06/23/2021 null Discharger 01/28/2021 null 442064 Enrollee - 401 Certification 2 2 CW442064 Enrollee - 401 Certification for Contra Costa County PWD Active CERFILLEXC 2004-0004-DWQ 06/23/2021 null Discharger 01/28/2021 null 442063 Enrollee - 401 Certification 2 2 CW442063 Enrollee - 401 Certification for Contra Costa County PWD Active CERFILLEXC 2004-0004-DWQ 06/23/2021 null Discharger 01/28/2021 null 438534 401 Certification 2 2 CW438534 401 Cert for Contra Costa County PWD Historical CERFILLEXC null 01/04/2021 12/22/2021 Discharger 06/10/2020 null 436585 401 Certification 2 2 CW436585 401 Cert for Contra Costa County PWD Active CERFILLEXC null 11/02/2020 null Discharger 01/30/2020 null 434759 401 Certification 2 2 CW434759 401 Cert for Contra Costa County PWD Active CERFILLEXC null 12/16/2020 null Discharger 10/08/2019 null 434746 401 Certification 5S 5B07CR00218 401 Cert for Contra Costa County PWD - Contra Costa County Routine Maintenance Program Project Active CERFILLEXC null 12/03/2021 null Discharger 10/07/2019 null 428753 401 Certification 5S 5B07CR00208 401 Cert for Contra Costa County PWD - Jersey Island Road Bridge Repair Project Historical CERFILLEXC null 05/17/2019 01/09/2020 Discharger 02/12/2019 null 428727 401 Certification 2 2 CW428727 401 Cert for Contra Costa County PWD Active CERFILLEXC null 06/24/2019 null Discharger 02/11/2019 null 427774 401 Certification 2 2 CW427774 401 Cert for Contra Costa County PWD Historical CERFILLEXC null 05/21/2020 02/09/2022 Discharger 12/17/2018 null 425617 Enrollee - 401 Certification 2 2 CW425617 Enrollee - 401 Certification for Contra Costa County PWD Historical CERFILLEXC SB17001GN 10/18/2018 01/03/2019 Discharger 10/10/2018 null 422310 Enrollee - 401 Certification 2 2 CW422310 Enrollee - 401 Certification for Contra Costa County PWD Active CERFILLEXC 2004-0004-DWQ 02/26/2019 null Discharger 06/27/2018 null 417293 401 Certification 2 2 CW417293 401 Cert for Contra Costa County PWD Historical CERFILLEXC null 05/02/2018 02/16/2024 Discharger 12/04/2017 null 417067 401 Certification 5S 5B07CR00198 401 Cert for Contra Costa County PWD - Marsh Creek Road Bridge Replacement (Bridge 28C-0141) Project Historical CERFILLEXC null 03/20/2018 03/06/2019 Discharger 11/14/2017 null 413676 401 Certification 2 2 CW413676 401 Cert for Contra Costa County PWD Active CERFILLEXC null 09/14/2017 null Discharger 06/05/2017 null 413206 401 Certification 2 2 CW413206 401 Cert for Contra Costa County PWD Historical CERFILLEXC null 10/24/2018 02/09/2022 Discharger 05/15/2017 null 411393 401 Certification 5S 5B07CR00188 401 Cert for Contra Costa County PWD, Morgan Territory Road Bridges 4.30 & 4.40 Scour Repair Project Historical CERFILLEXC null 01/05/2018 11/15/2018 Discharger 01/13/2017 null 406854 401 Certification 2 2 CW406854 401 Cert for Contra Costa County PWD Historical CERFILLEXC null 05/24/2018 07/03/2019 Discharger 06/14/2016 null 406264 401 Certification 5S 5B07CR00181 401 Cert for Contra Costa County PWD; Clifton Court Road Bridge Repair Project Historical CERFILLEXC null 01/30/2017 07/01/2021 Discharger 05/19/2016 null 405131 401 Certification 2 2 CW405131 401 Cert for Contra Costa County PWD Active CERFILLEXC null 05/09/2017 null Discharger 03/16/2016 null 404322 401 Certification 2 2 CW404322 401 Cert for Contra Costa County PWD Historical CERFILLEXC null 05/24/2016 02/09/2018 Discharger 01/15/2016 null 403501 401 Certification 2 2 CW403501 401 Cert for Contra Costa County PWD Historical CERFILLEXC null 08/29/2016 08/29/2021 Discharger 10/29/2015 null 399699 401 Certification 5S 5B07CR00167 401 Cert 05/29/2015 for Contra Costa County PWD, Marsh Creek Rd. Safety Improvements 2.0 to 2.25 Miles West of Deer Valley Road Historical CERFILLEXC null 05/29/2015 01/12/2016 Discharger 02/04/2015 null 399353 401 Certification 5S 5B07CR00166 401 Cert 04/17/2015 for Contra Costa County PWD, Orwood Road Bridge Replacement Project Historical CERFILLEXC null 04/17/2015 06/12/2017 Discharger 01/05/2015 null 399291 401 Certification 2 2 CW399291 401 Cert for Contra Costa County PWD Active CERFILLEXC null 05/25/2016 null Discharger 12/26/2014 null 396488 401 Certification 5S 5B07CR00160 WQC 07/24/2014 for Contra Costa County Marsh Creek Bridge Scour Repair Project Historical CERFILLEXC null 07/24/2014 11/13/2014 Discharger 06/02/2014 null 396136 401 Certification 2 2 CW396136 WQC for Contra Costa Cnty PWD Historical CERFILLEXC null 07/11/2014 07/10/2019 Discharger 05/08/2014 null 394816 401 Certification 2 2 CW394816 WQC for Contra Costa Cnty PWD Historical CERFILLEXC null 07/25/2014 07/25/2019 Discharger 02/04/2014 null 392997 401 Certification 2 null San Pablo Avenue Bridge Replacement Project at Rodeo Creek Historical CERFILLEXC null 06/04/2014 06/04/2019 Discharger 08/29/2013 null 392838 401 Certification 5S 5B07CR00132 WQC 04/30/2014 for Contra Costa Cnty PWD, Vasco Rd Safety Improve Phase 2 Project Historical CERFILLEXC null 04/30/2014 04/29/2019 Discharger 08/20/2013 null 392711 401 Certification 5S 5B07CR00150 WQC 02/07/2014 for Contra Costa Cnty PWD;Marsh Creek Detention Facility Bdg Replac Historical CERFILLEXC null 02/07/2014 10/27/2014 Discharger 08/12/2013 null 391167 401 Certification 5S 5B07CR00127 WQC 04/20/2012 for Contra Costa Cnty PWD Historical CERFILLEXC null 04/20/2012 04/20/2017 Discharger 06/14/2013 null 390287 401 Certification 5S 5B07CR00144 WQC 05/10/2013 for Contra Costa Cnty PWD; Deer Valley Rd Shoulder Widening Proj Historical CERFILLEXC null 05/10/2013 05/09/2018 Discharger 05/10/2013 null 390102 401 Certification 5S 5B07CR00142 WQC 04/16/2013 for Contra Costa Cnty PWD; Marsh Crk Safety Improvements Project Historical CERFILLEXC null 04/16/2013 04/15/2018 Discharger 04/16/2013 null 388708 401 Certification 5S 5B07CR00129 WQC 05/22/2012 for Contra Costa Cnty; Deer Valley Safety Improvement Project Historical CERFILLEXC null 05/22/2012 10/31/2012 Discharger 01/07/2013 null 386917 401 Certification 5S 5B07CR00123 WQC 06/08/2011 for Contra Costa Cnty PWD; Balfour Rd Culvert Repair Historical CERFILLEXC null 06/08/2011 06/08/2016 Discharger 08/13/2012 null 386699 401 Certification 5S 5B07CR00122 WQC 08/09/2011 for Claudia Gemberling; Highway Shoulder Widening Project Historical CERFILLEXC null 08/09/2011 08/09/2016 Discharger 07/31/2012 null 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 398557 Admin Civil Liability R2-2014-1017 ACL R2-2014-1017 for Contra Costa County PWD DISCHSW 10/21/2014 Historical Regulatory Measures linked to Related Parties Reg. Measure ID Organization Regulatory Measure Type Program Effective Date Status 442067 Sandeep Singh Enrollee - 401 Certification CERFILLEXC 06/23/2021 Historical 442065 Emma Burckert Enrollee - 401 Certification CERFILLEXC 06/23/2021 Active 442064 Sean O'neil Enrollee - 401 Certification CERFILLEXC 06/23/2021 Active 442063 Shrav Sundaram Enrollee - 401 Certification CERFILLEXC 06/23/2021 Active 438534 Laura Cremin 401 Certification CERFILLEXC 01/04/2021 Historical 399291 Sandeep Singh 401 Certification CERFILLEXC 05/25/2016 Active