General Information Party ID Party Name Party Classification Mailing Address Work Phone Email/Website 52676 Mid Peninsula Regional Open Space District Special District 330 Distel Circle Los Altos, CA 94022 650-691-1200 null Related Places Place ID Place Name County Region Place Type Relationship to Party Relationship Start Date Relationship End Date 899967 Purisima Pond San Mateo 2 Dredge/Fill Site Owner 02/27/2025 null 899866 Paulin Crossing And Landslide Repair Project San Mateo 2 Dredge/Fill Site Owner 02/21/2025 null 885131 MROSD Bear Creek Redwoods Phase II Trails Project Santa Clara 2 Dredge/Fill Site Owner 01/03/2023 null 876741 Midpen Open Space Maintenance and Restoration Program San Mateo 2 Dredge/Fill Site Owner 10/06/2021 null 874804 Alpine Road Trail Improvements Project San Mateo 2 Dredge/Fill Site Owner 06/21/2021 null 866595 Ravenswood Bay Trail Connection Supplemental Permitting San Mateo 2 Dredge/Fill Site Owner 05/06/2020 null 864561 Mindego Ranch Ponds Enhancement Project San Mateo 2 Dredge/Fill Site Owner 01/30/2020 null 851456 Mud Lake Improvement Project Santa Clara 2 Dredge/Fill Site Owner 10/03/2018 null 851443 Bear Creek Upper Lake Public Access Project Santa Clara 2 Dredge/Fill Site Owner 10/02/2018 null 846516 Ravenswood Bay Trail Connection at Ravenswood Open Space Preserve San Mateo 2 Dredge/Fill Site Owner 04/17/2018 null 839238 Webb Creek Bridge Replacement Project Santa Clara 2 Dredge/Fill Site Owner 08/25/2017 null 830357 Hendrys Creek Restoration Project Santa Clara 2 Dredge/Fill Site Owner 12/06/2016 null 813991 Harkins Bridge Replacement Project San Mateo 2 Dredge/Fill Site Owner 03/19/2015 null 810603 Mid Peninsula Open Space District Routine Maintenance San Mateo 2 Dredge/Fill Site None null null 777126 Pond 07 and 08 San Mateo 2 Facility Owner 06/25/2013 null 777124 El Corte de Madera Open Space Preserve San Mateo 2 Facility Owner 06/19/2013 null 770747 Pond DR06 Repair and Habitat Restoration San Mateo 2 Dredge/Fill Site Owner 09/07/2011 null 714648 Mid-Peninsula Regional Open Space Dist - Aquatic Pesticides Santa Clara 2 Habitat Restoration Area None null null 274933 el corte de madera creek San Mateo 2 Dredge/Fill Site Owner 06/04/2004 null Related Parties Party ID Party Name Party Type Role/Relationship Relationship Start Date Relationship End Date Classification 649419 David Liefert Person Legally Responsible Official 02/27/2025 null null 649342 Leigh Guggemos Person Legally Responsible Official 02/21/2025 null null 630491 Coty Sifuentes-Winter Person Employee 02/22/2022 null null 625610 Scott Reeves Person Legally Responsible Official 06/21/2021 null null 584961 Zachary Alexander Person Legally Responsible Official 10/02/2018 null null 576038 Jason Lin Person Legally Responsible Official 04/17/2018 null null 568153 Matt Brunnings Person Legally Responsible Official 08/25/2017 null null 560808 Meredith Manning Person Legally Responsible Official 12/06/2016 null null 550473 Aaron Hebert Person Legally Responsible Official 03/19/2015 null null 528856 Julie Andersen Person Legally Responsible Official 09/07/2011 null null 6886 California State Coastal Conservancy Organization In an Agreement With 01/03/2008 null State Agency 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 450637 401 Certification 2 2 CW450637 401 Cert for Mid Peninsula Regional Open Space District Active CERFILLEXC null 01/19/2023 null Discharger 01/03/2023 null 446680 Enrollee - WDR SB null Enrollee - WDR under Board of Forestry California Vegetation Treatment Program for Bear Creek Redwoods Vegetation Treatment Project Active VEGMANIP WQ-2021-0026-DWQ 07/06/2021 null Discharger 02/22/2022 null 445220 401 Certification 2 2 CW445220 401 Cert R2-2023-0011 for Mid Peninsula Regional Open Space District Active CERREST R2-2023-0011 02/09/2022 null Discharger 10/06/2021 null 443843 401 Certification 2 2 CW443843 401 Cert for Mid Peninsula Regional Open Space District Active CERFILLEXC null 08/27/2021 null Discharger 06/21/2021 null 436587 401 Certification 2 2 CW436587 401 Cert for Mid Peninsula Regional Open Space District Active CERFILLEXC null 07/24/2020 null Discharger 01/30/2020 null 425507 401 Certification 2 2 CW425507 401 Cert for Mid Peninsula Regional Open Space District Active CERFILLEXC null 09/09/2019 null Discharger 10/03/2018 null 425494 401 Certification 2 2 CW425494 401 Cert for Mid Peninsula Regional Open Space District Active CERFILLEXC null 09/09/2019 null Discharger 10/02/2018 null 420909 401 Certification 2 2 CW420909 401 Cert for Mid Peninsula Regional Open Space District Active CERFILLEXC null 07/29/2019 null Discharger 04/17/2018 null 415957 Enrollee - 401 Certification 2 2 CW415957 Enrollee - 401 Certification for Mid Peninsula Regional Open Space District Active CERFILLEXC 2004-0004-DWQ 07/09/2018 null Discharger 08/25/2017 null 410538 401 Certification 2 2 CW410538 401 Cert for Mid Peninsula Regional Open Space District Active CERFILLEXC null 02/07/2018 null Discharger 12/06/2016 null 400299 401 Certification 2 2 CW400299 401 Cert for Mid Peninsula Regional Open Space District Active CERFILLEXC null 06/26/2017 null Discharger 03/19/2015 null 391600 401 Certification 2 null WQC 05/22/2012 for Midpeninsula Regional Open Space District Historical CERREST null 05/22/2012 05/22/2017 Discharger 06/25/2013 null 391354 401 Certification 2 null WQC 04/06/2012 for Midpeninsula Regional Open Space District Historical CERFILLEXC null 04/06/2012 04/06/2017 Discharger 06/19/2013 null 381241 401 Certification 2 null 401 Certification 03/03/2010 for Midpeninsula Regional Open Space District Historical CERFILLEXC null 03/03/2010 03/03/2015 Discharger 09/07/2011 null 374491 WDR 2 2 CW374491 Mid-Peninsula Regional Open Space District Active CERFILLEXC R2-2010-0083 06/09/2010 null Discharger 06/09/2014 null 339225 Enrollee 2 2 43AP00020 Enrollee-CAG990005-Aqtc Pstcds-Weeds > Mid-Peninsula Regional Open Space Dist Historical NPDNONMUNIPRCS 2004-0009-DWQ 10/22/2004 11/27/2013 Discharger 01/03/2008 null 167194 401 Certification 2 WS-41-004 WS-41-004 Historical CERFILLEXC null null null Discharger 06/17/2005 null 167193 401 Certification 2 WS-41-003 WS-41-003 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 Regulatory Measures linked to Related Parties Reg. Measure ID Organization Regulatory Measure Type Program Effective Date Status 454250 California State Coastal Conservancy Enrollee - WDR VEGMANIP 07/25/2023 Active 446680 Coty Sifuentes-Winter Enrollee - WDR VEGMANIP 07/06/2021 Active 438150 California State Coastal Conservancy Enrollee - 401 Certification CERREST 10/02/2020 Active 416337 California State Coastal Conservancy 401 Certification CERFILLEXC 07/06/2020 Active 411180 California State Coastal Conservancy 401 Certification CERFILLEXC 04/04/2018 Active 404342 California State Coastal Conservancy 401 Certification CERFILLEXC 11/14/2018 Historical 403122 California State Coastal Conservancy Enrollee - 401 Certification CERFILLEXC 10/08/2015 Historical 402335 California State Coastal Conservancy Enrollee - 401 Certification CERREST 08/20/2015 Historical 397844 California State Coastal Conservancy Enrollee - 401 Certification CERREST 10/02/2014 Historical 394176 California State Coastal Conservancy Enrollee - 401 Certification CERREST 11/30/2012 Historical 391681 California State Coastal Conservancy 401 Certification CERREST 04/17/2012 Historical 305272 California State Coastal Conservancy WDR CERFILLEXC 07/20/2005 Historical 137648 California State Coastal Conservancy WDR WDR 04/28/1988 Historical 136706 California State Coastal Conservancy WDR WDR 03/25/1982 Historical