General Information Party ID Party Name Party Classification Mailing Address Work Phone Email/Website S606001 Contra Costa Water District Special District 1331 Concord Avenue Concord, CA 94520 N/A N/A Related Places Place ID Place Name County Region Place Type Relationship to Party Relationship Start Date Relationship End Date S241853 Multi Purpose Pipeline Prj Contra Costa 5S Facility Discharger 09/01/2005 null S929851 CONTRA COSTA WATER DISTRICT CANAL SLOPE REPAIRS Contra Costa 5S Facility Discharger 03/27/2025 null S934383 CCWD Storm Damage Repairs Culvert 24 Contra Costa 5S Facility Discharger 08/07/2025 null S615059 Bolman Wtp Safety & Water Contra Costa 2 Facility Discharger 03/11/1996 null S245330 North Main St & Taylor Blvd Slide Reparis Contra Costa 2 Facility Discharger 09/01/2005 null S208892 Bay Point Pipeline Proj Contra Costa 2 Facility Discharger 09/01/2005 null S713837 Alternative Intake Proj Victoria Canal Setback Levee & Site Work San Joaquin 5S Facility Discharger 02/25/2008 null S614940 Mallard Reservoir Slope Erosion Repair Contra Costa 2 Facility Discharger 10/11/2003 null S610307 Los Vaqueros Area Vasco Rd Contra Costa 5S Facility Discharger 08/18/1994 null S729839 CCWD Brentwood City WTP Contra Costa 5S Facility Discharger 11/25/2008 null S649314 Mallard Reservoir Erosion Repair Project Contra Costa 2 Facility Discharger 04/13/2007 null S803947 Bollman WTP Seismic Improvements Contra Costa 2 Facility Discharger 06/25/2010 null S813196 Los Vaqueros Expansion Recreation Facility Contra Costa 5S Facility Discharger 10/20/2011 null S825087 Contra Costa Canal Segment 2 Contra Costa 5S Facility Discharger 08/12/2013 null S824993 Kellogg Creek Restoration Project Contra Costa 5S Facility Discharger 08/07/2013 null S858380 Canal Levee Elimination and Flood Protection Project Segments 3 and 4 Contra Costa 5S Facility Discharger 08/28/2017 null S613112 Diablo Hills Reservoir Contra Costa 2 Facility Discharger 08/18/1998 null S217912 Clayton Transmission Main Contra Costa 2 Facility Discharger 09/01/2005 null S610291 50 Sand Creek Contra Costa 5S Facility Discharger 09/02/1994 null S923154 Shortcut Pipeline Improvements Project Contra Costa 2 Facility Discharger 06/30/2024 null S241852 Multi Purpose Pipe Line Prj Contra Costa 2 Facility Discharger 09/01/2005 null S634594 Midhill Reservoir II Contra Costa 2 Facility Discharger 06/14/2006 null S825124 Deer Valley East Restoration Project Contra Costa 5S Facility Discharger 08/13/2013 null S851581 Empire Self Storage Contra Costa 5S Facility Discharger 11/30/2016 null S936613 Los Vaqueros Ponds D2 K3 and M1 Storm Damage Repairs Contra Costa 5S Facility Discharger 09/11/2025 null S808952 San Miguel Solar Contra Costa 2 Facility Discharger 03/31/2011 null S821432 Clayton Regency Mobile Home Park Emergency Water Pipeline Extension Project Contra Costa 5S Facility Discharger 02/07/2013 null S824654 Randall Bold WTP Solids Lagoon Nos 6 & 7 Contra Costa 5S Facility Discharger 07/19/2013 null S853819 Shortcut Pipeline Phase 2 Improvements Contra Costa 2 Facility Discharger 03/09/2017 null S912297 1474 Canal Replace Project Segment 5B Contra Costa 5S Facility Discharger 04/20/2023 null S803865 Los Vaqueros Reservoir Dam Enlargement Project Contra Costa 5S Facility Discharger 06/23/2010 null Related Parties Party ID Party Name Party Type Role/Relationship Relationship Start Date Relationship End Date Classification N/A Thomas J Linville Contact Owner Contact null null null N/A Pete Schoemann Contact Owner Contact null null null N/A Stephen Welch Contact Owner Contact null null null N/A Jeff Quimby Contact Owner Contact null null null N/A GARY Darling Contact Owner Contact null null null N/A Stan Ali Contact Owner Contact null null null N/A Marie Valmores Contact Owner Contact null null null N/A Miki Tsubota Contact Owner Contact null null null N/A Kim Lindbery Contact Owner Contact null null null N/A David Omoto Contact Owner Contact null null null N/A Stephen J Welch Contact Owner Contact null 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 S591006 Construction 5S 5S07C409725 Notice Of Intent New Application Active CONSTW 2009-0009-DWQ 09/29/2025 null Discharger 09/11/2025 null S588476 Construction 5S 5S07C409466 Notice Of Intent New Application Active CONSTW 2009-0009-DWQ 09/16/2025 null Discharger 08/07/2025 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. S897331 09/01/2025 SW - Late Report Failure to submit the 2024-2025 Annual Report by 09/01/2025 Violation N Report Shortcut Pipeline Improvements Project S574817 2009-0009-DWQ Y Enforcement Actions Enforcement ID Enforcement Type Enf. Order No. Title Program Effective Date Status S408243 13267 Letter/Order null 5S07I021940 INDSTW 03/09/2012 Historical S226649 13267 Letter/Order UNKNOWN 2 07C307343 CONSTW 07/26/1999 Historical S462180 Notice of Violation null 2 07C404462 CONSTW 09/05/2025 Active S226693 Notice of Violation UNKNOWN 2 07C307343 CONSTW 08/16/1999 Historical Regulatory Measures linked to Related Parties Reg. Measure ID Organization Regulatory Measure Type Program Effective Date Status