General Information Party ID Party Name Party Classification Mailing Address Work Phone Email/Website 9305 Contra Costa County Flood Control County Agency 255 Glacier Drive Martinez, CA 94553-4825 925-313-2190 null Related Places Place ID Place Name County Region Place Type Relationship to Party Relationship Start Date Relationship End Date 895845 Wildcat Creek Fish Passage Project Contra Costa 2 Dredge/Fill Site Owner 07/29/2024 null 860162 Lower Walnut Creek Restoration Project Contra Costa 2 Dredge/Fill Site Owner 07/30/2019 null 840866 Lower Walnut Creek Restoration Project Contra Costa 2 Dredge/Fill Site Owner 10/17/2017 null 830777 Three Creeks Parkway Restoration Project Contra Costa 5S Dredge/Fill Site Owner 12/16/2016 null 789503 Upper Sand Creek Basin Expansion Project Contra Costa 5S Dredge/Fill Site Owner 12/28/2012 null 771086 Contra Costa County Flood Control & Water Conservation District Contra Costa 2 MS4 Owner and Operator 09/15/2011 null 763821 Marsh Creek Stream Flow Gauge Installation Contra Costa 5S Dredge/Fill Site Owner and Operator 11/03/2009 null 260240 San Ramon Creek at Danville Li Contra Costa 2 Dredge/Fill Site Owner 06/17/2005 null 212911 Camino Tassajara Alameda 2 Dredge/Fill Site Owner 06/17/2005 null Related Parties Party ID Party Name Party Type Role/Relationship Relationship Start Date Relationship End Date Classification 600663 Allison Knapp Person Legally Responsible Official 07/30/2019 null null 569103 Paul Detjens Person Legally Responsible Official 10/17/2017 null null 561179 Mike Carlson Person Legally Responsible Official 12/16/2016 null null 526074 Mitch Avalon Person Legally Responsible Official 12/28/2012 null null 526074 Mitch Avalon Person Employee 11/03/2009 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 433295 401 Certification 2 2 CW433295 401 Cert for Contra Costa County Flood Control Active CERFILLEXC null 10/08/2020 null Discharger 07/30/2019 null 416713 Enrollee - 401 Certification 2 2 CW416713 Enrollee - 401 Certification for Contra Costa County Flood Control Historical CERFILLEXC SB17001GN 10/30/2017 10/30/2022 Discharger 10/17/2017 null 416152 401 Certification 5S 5B07CR00187 401 Cert for Contra Costa County Flood Control - Three Creeks Parkway Restoration Project Historical CERREST null 03/16/2018 08/02/2022 Discharger 09/06/2017 null 391042 401 Certification 2 null WQC 07/21/2010 for Contra Costa County Flood Control Historical CERDREDGE null 07/21/2010 07/21/2015 Discharger 06/11/2013 null 388635 401 Certification 5S 5B07CR00138 WQC 12/12/2012 for Contra Costa CFC; Upper Sand Creek Basin Expansion Proj Historical CERFILLEXC null 12/12/2012 12/11/2017 Discharger 12/28/2012 null 377775 401 Certification 5S 5B07CR00107 401 Cert 11/03/2009 for Contra Costa County, Marsh Creek Streamflow Gauge Instal Historical CERFILLEXC null 11/03/2009 11/03/2014 Discharger 11/03/2009 null 171921 401 Certification 2 C-07-0566 C-07-0566 Historical CERFILLEXC null null null Discharger 06/17/2005 null 170935 401 Certification 2 2 0307053 2 0307053 Historical CERFILLEXC null null null Discharger 06/17/2005 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 385941 Staff Enforcement Letter null SEL 05/09/2012 for Contra Costa County Flood Control MNSTW1 05/09/2012 Historical Regulatory Measures linked to Related Parties Reg. Measure ID Organization Regulatory Measure Type Program Effective Date Status