CC CUP 23-001Conditional Use Permit 23-001; Corbett Creek Floodplain and Stream Restoration Project 6/6/2023 1 7/25/2023 2 Project Objectives Improve water quality Restore riparian habitat to more natural state Improve flood capacity within Corbett Creek Reduce downstream flooding impacts within and south of City 7/25/2023 3 Financial and Personnel Resources Future funding for operation and maintenance of Clark Property Sediment Basins City partnering with County on maintenance costs Expected costs of approximately $20,000 per year City responsible for half of this cost Applicant requesting fee waiver $6,388.00 – representing application fees for CUP Approval would alleviate requirement for 33 individual environmental documents and 33 CUP applications Grant funding to complete project will reduce burden on property owners 7/25/2023 4 Background Corbett Creek is a tributary to Arroyo Grande Creek Along Corbett Canyon and Tally Ho before joining AG Creek near Branch St. 2007 – City received Civil Liability Complaint Notice Required to spend $60,000 on SEP Contracted with RCD to study Clark Property and Corbett Creek DWR awarded RCD grant -- $831,420 City expended $84,000 between 2007 and 2012 Appraisal of Clark Property, designs, surveys and environmental documents PC recommended approval June 6, 2023 7/25/2023 5 Project Description Major Components: Corbett Creek restoration – “The Tally Ho Project” Clark property sediment basins 7/25/2023 6 6/6/2023 7 Project Description The Tally Ho Project Identified in 2006 “Arroyo Grande Creek Erosion, Sedimentation and Flooding Alternatives Study” as priority site for floodplain restoration and sediment retention Restoration would remedy existing and predicted problems concerning flood control and environmental degradation within watershed Arresting large headcut (approx. 6’) Contributing to erosivity and sediment loading Re-graded, grade controls installed 2,500cf of sediment removed from channel in 10 year period Reference: 100’x100’x7’ 7/25/2023 8 7/25/2023 9 7/25/2023 10 7/25/2023 11 7/25/2023 12 Project Description Clark Property Sediment Basins 12.5 acre conservation easement Objectives: Flood Protection Detain peak flows and fine sediment Restoration of Riparian Area Impacted by urban development over past 150 years Water Quality Protection Sediment detention Reduced flood risk for South SLO Co. Sanitation District Reduce peak flows in AG Creek 7/25/2023 13 Project Description 7/25/2023 14 Process AGMC16.44.050.C.6: “Creeks shall remain in their natural state ... unless approved by the city council … for a conditional use permit and permitted by other responsible agencies.” PC makes recommendation regarding CUP CC reviews CUP, considers fee waiver 7/25/2023 15 Previous Consideration April 16, 2013 – PC reviewed project, certified MND Project not constructed due to lack of funding for long term maintenance Previous approval expired Changes to CEQA law necessitated addendum to MND Project not reviewed by CC 7/25/2023 16 Staff Advisory Committee Police, Fire, Public Works, CDD, Recreation Reviewed: September 8, 2022 February 2, 2023 Supportive of project Recommended approval of project to PC 7/25/2023 17 Outreach and Access RCD coordinating landowner access 4/19/23 – RCD coordinated public outreach meeting Provided information regarding restoration project Provided resources for acceptable creek maintenance activities 7/19/23 – RCD coordinated second outreach meeting 7/25/2023 18 Outreach and Access 7/25/2023 19 Phasing Release of grant funds relies upon guaranteed maintenance of restoration work Commitment from property owners in reach 3 to complete headcut repair Working with property owners on Tally Ho to obtain maintenance guarantees of private property Working with SLO CO to identify funding source for maintenance of Clark Property sediment basins Approval of entire project will allow RCD and property owners to complete the work as maintenance is guaranteed 7/25/2023 20 No Rise Certification Applicant required to certify that construction will not result in increased flooding downstream RCD’s District Engineer has concluded that project will not result in additional flooding downstream City Engineering staff has peer reviewed hydraulic analysis and concludes that analysis was done appropriately 7/25/2023 21 Questions? 7/25/2023 22