Carbon Creek Channel (OCFCD Facility No. B01) from upstream Intersection of Western/Orange to upstream Beach Boulevard.

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1 Carbon Creek Channel (OCFCD Facility. B01) from Lead Agency: Agency: Project Director: Address: Orange County, Public Works, Infrastructure Programs, Capital Programs Sam Ali 300 N. Flower Street Santa Ana Phone: Cell Phone: General Project Information: Name: Description: Goals/Objectives: Need: Carbon Creek Channel (OCFCD Facility. B01) from upstream Intersection of Western/Orange to upstream This channel was constructed in the 1959 designed to convey the 25-year storm event and is not in a FEMA Special Flood Hazard Area, Zone A is contained in channel, however it remains hydraulically deficient. The existing geometrics of this channel is a trapezoidal channel (bottom width is 8-ft, side slope is 1.5 to 1.5) lined with rip; one half of the channel will ultimately be improved as an L shaped channel lined with concrete and designed to convey the 100-year storm event; the length is approximately 2,300 feet. To increase the level of flood protection for the residents within the B01 flood plain by reducing or eliminating potential for personal injury and property damage due to flooding. Improve this reach of the flood control channel to be able to convey the 100-year storm design discharge and eventually reduce the FEMA Special Flood Hazard Area (SFHA) aka 100- year floodplain to containment within the channel, thus eliminating the high cost of obtaining mandatory flood insurance. Utilize a flood control improvement alternative that fits within the existing right-of-way constraints. Prioritize phasing of the construction of the proposed channel improvements to maximize benefits for the watershed. The existing channel is deficient, capacity is 65% of a 25-year storm event Meets statutory eligibility gates of 2015 IRWM Grant Funding: IRWM Goals: 1 of 5

2 Carbon Creek Channel (OCFCD Facility. B01) from Safely co-manage flood protection and water conservation. Maintain quality of life. IRWM Type OWOW Plan Project Type: Construction Latitude: Project Location: Longitude: Project is construction improvements to Orange County Flood Control District (OCFCD) Facility. B01, Carbon Creek Channel located in Orange County, City of Anaheim Benefit Zone Area (mi2): 2 Project Benefits: Benefits Water supply reliability, conservation and water-use efficiency Stormwater capture, storage, cleanup, treatment and management Removal of invasive species; wetlands creation or enhancement; acquisition, protection and restoration of open space n-point source pollution reduction, management, monitoring Groundwater recharge and management Contaminant and salt removal, reclamation, desalting and conveyance to users Water banking, exchange, reclamation and improvement of water quality Multipurpose flood and stormwater management programs Watershed protection and management Drinking water treatment and distribution Ecosystem and fisheries restoration and protection Applicable Where Benefits Accrue: 2 of 5

3 Carbon Creek Channel (OCFCD Facility. B01) from Jurisdiction: Explanation: Watershed/Su b-region: Explanation: Synergies: Multiple Communities The benefactors are residences and businesses from Cities of Fullerton and Anaheim. Entire Watershed The Carbon Creek Watershed has a drainage area of 12,620 acres. It is within the B Watershed which has a drainage area of 16,045 acres. The OCFCD s goal and plans work towards FEMA & National Flood Insurance Program s (NFIP) efforts in protecting property and lives from the threat of flood damage from storms. When the project has been completed, the OCFCD submits a Letter of Map Revision (LOMR) to FEMA to revise Flood Insurance Rate Map (FIRM) to reflect the floodplain as removed or diminished to containment within the channel facility alleviating the costly mandatory flood insurance premiums imposed on the benefactors, the residents and businesses from that community (s). Benefits to Disadvantaged Communities (DAC) and Native Tribal Communities (TC) 100% DAC: Portion DAC: DAC %: 0 100% TC: Portion TC: TC %: 0 Project area benefiting DAC (acres) : 1300 Describe DAC and TC Benefits: Property and lives would be protected from the threat of flood damage and the FEMA Flood Insurance Rate Map will be revised to reflect the 100-year to be contained in channel alleviating the costly mandatory flood insurance premiums imposed on the DAC. Human Right to Water: N/A Environmental Justice: N/A Project Partners: 3 of 5

4 Carbon Creek Channel (OCFCD Facility. B01) from Agency Name Contact Phone Collab Planning Direct Funding In-Kind Service Co-Manager Project Funding: Category Amount Percent Total Project Cost $7,500, Requested OWOW 2015 Funding $ Match Contribution $7,500, Local Contribution $7,500, Federal Contribution $ In-Kind Contribution $ Other $ SRF Loan $ Annual O&M Costs: $140, Funding Secured: Explain: O&M Funding Secured: Explain: Project Criteria: Criteria Metric Description Flood Risk Reduction e+008 $ Project Status: Project Status: Conceptual design (15%) completed Est. Complete Date: 06/30/2019 Est. Operational Life (years): 100 Agency Constructed Similar Projects : CEQA Status: In Progress Date: 06/30/ of 5

5 Carbon Creek Channel (OCFCD Facility. B01) from NEPA Status: t Applicable Date: Project Attachments: Type FileName Project Complete: Project Active: 5 of 5