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TERRA LAND GROUP , LLC and/or funded in association with the San Joaquin Council of Governments("SJCOG") (See Enclosure 11);and (vi) Unresolved plans as to how the cities of Manteca and Lathrop can reasonably drain what appears to be ever-increasing amounts of stormwater and effluent wastewater from developing areas into non-developing areas that flooded in 1997(See Enclosures 1-23); COMMENT:TLG is including copies of letters previously submitted to other regulating and land use authorities in the Manteca and Lathrop areas to make the River Islands EIR team members fully aware that any and all total drainage flow volumes and drainages flow patterns to be expected in and along the South Delta may be different than what the narrow scope of existing flood models may indicate. QUESTION:What potential increased flood water,stormwater,and effluent wastewater, irrigation water,potable water delivery,traffic circulation,emergency vehicle services response and private property road access impacts and changes to drainage patterns may be created due to the construction (and/or expansion)of 100-year flood protection infrastructure as appears to be called for due to a recent May 21,2019 San Joaquin County Board of Supervisors approval of Morning Hearing item#1: Development Title Text Amendment No. PA 1900067 allowing revisions to the Definition of Structure? (Within Enclosure 8,see its own Enclosure 22) (vii)What appears to be the City of Manteca's total indifference in following its own goals and policies as stated in the existing 2023 Manteca General Plan (See Enclosure 8);and (viii)What appears to be the City of Manteca's total indifference in following the Handbook for Local Communities for Implementing California Flood Legislation into Local Land Use Planning("2010 Land Use Planning Guide")as issued by the California Department of Water Resources in 2010. (See Enclosure 8,pages 8&9) QUESTION: How can anyone determine the potential changes to both short-term and long-range total floodwater,stormwater and wastewater flow volumes and drainage flow patterns to be expected without respecting and following the 2010 Land Use Planning Guide? (ix) Flood and other hydrology-related drainage impacts anticipated to occur in conjunction with the ACE train and Valley Link rail expansions;and (x) Flood and other hydrology-related drainage impacts anticipated to occur in conjunction with RD 17 planned improvements associated with any and all Phase II, Phase III,and California Senate Bill No.5 200-year projects to be considered;and (xi) Flood and other hydrology-related impacts that may occur in conjunction with anticipated changes to the Tri-Dam Project,the South San Joaquin Irrigation District,and the Eastern San Joaquin Groundwater Authority as well as other local water master plans;and (xii) Flood and other hydrology-related impacts that may occur in conjunction with the anticipated expansion of River Islands as proposed in the Notice of Preparation for the River Islands Phase 2 Project/Update for the West Lathrop Specific Plan. 5151 E. ALMONDWOOD DRIVE MANTECA, CA 95337 Pg.3 of 6