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Comment <br />Letter <br />L1 <br />May 5, 2020 <br />Kenny Nguyen <br />City of Santa Ana <br />Public Works Agency <br />20 Civic Center Plaza M-36 <br />Santa Ana, CA 92702 <br />C�C Public Works <br />NCL-20-0001 <br />Subject: Fairview Bridge Replacement and Street Improvements (9th Street to 16s' Street) <br />Dear Kenny Nguyen, <br />Thank you for the opportunity to comment on the Notice of Availability of Draft Initial Study/Mitigated <br />Negative Declaration for the Fairview Bridge Replacement and Street Improvements. The County of <br />Orange offers the following comments for your consideration. <br />OC Flood Programs/Floodplain Management & Hydrology Section <br />r. All work, within or adjacent to any Orange County Flood Control District (OCFCD) right-of-way <br />for flood control facilities, shall be conducted so as not to adversely impact a channel's <br />conveyance, capacity, structural integrity, hydraulic flow conditions, access and maintainability. L-1-2 <br />Furthermore, all proposed projects within OCFCD's right-of-way should be reviewed and <br />approved by OC Public Works, and the work should be conducted only after an encroachment <br />permit has been obtained. For information regarding the permit application process and other <br />details, please refer to the Encroachment Permits Section link on OC Public Works' website <br />http://www.ocpubheworks.com/ds/permits/encroachmentLpermits. <br />2. It is acknowledged that the Draft Initial Study/Mitigated Negative Declaration provided a River <br />Hydraulics Analysis as an appendix. However, the provided information was not detailed <br />enough to confirm that the proposed project has minimal affects to the Santa Ana River. <br />Detailed technical reviews and approvals for the proposed work will be accomplished within tu- L-1-3 <br />permit process described above. In addition, all hydrologic and hydraulic studies must conform <br />to the current guidelines and criteria as specified in the Orange County Hydrology Manual <br />LV <br />aSar,i,i <br />75B-187 <br />