20B - AA - AGMT - DELHI DIVERSION

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FublicWorks Integrity, Accountability, Service, Trust Shane L. Silsby, Director February 24, 2016 Mr. Tyrone Chesanek, Principal Civil Engineer City of Santa Ana, Public Works Agency 20 Civic Center Plaza Santa Ana, California 92701 NCL-16-011 Subject: Notice of Intent to Adopt a Mitigated Negative Declaration for the Santa Ana Delhi Channel Diversion Project Dear Mr. Chesanek: The County of Orange has reviewed the Notice of Intent to Adopt a Mitigated Negative Declaration for the Santa Ana Delhi Channel Diversion Project and offers the following comments: Flood Proerams: 1. Page 1-5, Section 1.0, P paragraph of the IS/MND states that "The City of Santa Ana in association with the Cities of Newport Beach and Costa Mesa is proposing a low flow diversion project.." Please add County/OCFCD as one of the project proponents to be consistent with the rest of the document. 2. Page 1-5, Section 1.0, 3rd paragraph: Please change "Watershed Protection Group" to "Environmental Resources". 3. Page 1-6, Section 1.2, last sentence: Please correct typo — references are listed in Section 6.0 (not 7.0). 4. Page 2-1, Section 2.2, V and 2nd paragraphs indicate that the total tributary area to Santa Ana Delhi Channel (F01) is 10,158 acres. Our records show F01 has a catchment area of about 11,000 acres. Please verify and revise as appropriate. 5. Page 2-5, Figure 1: It is noted that the watershed boundaries of Santa Ana Delhi (1701), Santa Ana Gardens (F02), and Paularino (F03) Channels have some discrepancies compared to the drainage map (i.e., F01 Proposed Diversion Structure Watersheds rev.pdf) provided to the City of Santa Ana (City). Please verify drainage boundaries and revise as appropriate. 300 N. Flower Street Santa Ana, CA 92703 www.00publlcworks.com P.O. Box 4048, Santa Ana, CA 92702-4048 714.667.8800 1 Info@OCPW.00gov.com 20B-19