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MOUNTAIN HOUSE SPECIFIC PLAN II <br /> Figure 15.38:Existing Flood Hazard Zones.FEMA it]f3 veer.Figure T5.3a Existing Flood <br /> Hazard lanes SS 5 200-Year; and Figure 15.4: North Area Grading Sections). <br /> Stabilization of the existing levee will be empiayed as necessary to protect the CId River <br /> Regional Paris area. The grading approach involves the following: <br /> ■ Material from the upper elevation areas along Byron Road will be cut and used as fill in <br /> the lower elevation areas along Old River as described in the Conditional Letter of Map <br /> Revision issued by FEMA. <br /> • The existing levee will be graded and reinforced to meet FEMA certification <br /> requlrements far park use,if any. <br /> Residential building pads along Old River wiJi range from elevation 40.5 ie13,2 to <br /> 16 feet(instead of 6.5 to 12 feet as envisioned by the Master Plan). <br /> Proposed lake and ge{€oryert spaca areas within Me Neighborhoods north of Syron <br /> Road would be lowered to continue to pr❑vide storrrr Conveyance and storage as <br /> required in the NHCS b Storm Water Master Ptah. <br /> Development areas behind the top of the fill area contained within the Old River <br /> Regional Parte boundary will drain away from The river, back into secondary and <br /> primary collection systems within each Neighborhood,and ultimately to Old River via <br /> Mountain House Creek. <br /> Lakesloperi space areas within Neighborhood K and L wtll be utilized fpr water quality <br /> tfeatrnent and flood storage. Gravity flow and discharge to Mountain House Greek will <br /> be thfough flap gates,eliminating the need for pumps as envisioned by the Master <br /> Plan <br /> SPJI Implementation Measures <br /> i. MHCSD Design and Construction Reouirem ents. All implementing projects <br /> shall ccmply with the applicable prow Islons of the MHOS❑Development <br /> Standards. <br /> 2, N1HCS0 Flood Protection Requirements. All implementing projects shall <br /> comply with the applicable provisions of the MHCSD Storm Drainage Master <br /> Plan. <br /> 3_ FEMA Appiicatlon. After the new river flood protection improvements are <br /> constructed along Old River,an application shall be made to the Federal <br /> Emergency Management Agency to change the flood insurance maps. <br /> d. Amendments to N1HC5D Design_Manual. The MH CSD Design Manual shall <br /> be revised to be consistent with a11 provisions of this Specific Plan related to <br /> grading and flood control along Old River. <br /> 5_ 5116 200-Year Flood Protection. For a building oemrtt for any new residence <br /> in the tdentlfled S8 5 area,the finished floor elevation shall be no ofeater <br /> than 3 feet below the 200-rear Urban Level of Flood ProtectTon(ULOPl <br /> surface elevation as identified hn the PDVR&r mapping shown as Fkjure <br /> 15.313, <br /> CHAPTER FIFTEEN STORM DRAtNAGL AND FLOOD PROTECTION PAGE 15.11 <br /> Revised 91 t12001 <br /> Resolution Template 01/2017 <br />