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<br />Planning Area has been or is in the process of being mined, with the remainder expected to lastJ..... <br />anothu 20 t8 35 yea" until about the year 2030." <br /> <br />'!1,e California Division of Mines and Geology has t!eseribet! the 'Juana!) and tj""litj sf this aggregate <br /> <br />in great detail and designated_thij land the sand and gravel land in and adjacent to the Pleasanton <br /> <br />Planning Area as an "Aggregate Resource .Area of Regional Significancc.,,16 'L11is designation notifies <br /> <br />the City and adjacent entities to identify these areas, assist in their management, and promote the <br /> <br />conservation and development of this constnlction grade aggregate ul_iet-their General Plan;;., <br /> <br />Figure VII-3 shows the location of these lands, which arc mostly owned by sand and gravel companies <br /> <br />and designated for Sand and Gravel Harvesting use, on the General Plan Map. This land is used for <br /> <br /> <br />the manaved production of natural resources. .\n e.{ception is the Ruh) Hill area "hieh "aj al'pro. ed <br /> <br />for partial de.e1spment hy ,\Ian,eda Count) in t992 prim to its anne.uti"n int" Plea.l,lIu"n. Future <br /> <br />har. e..ang hnd .edamati"n "ea. iaes are regulared hy d,e ,\Ian,eda Count) Reelanution Plan: <br /> <br />[moved] '!1,e redlln.ation of tl.e .land hnt! grll.d 'luarrie.l is regulated by The Specijic Plan for <br /> <br />I~,",7IIore-An/ador Valley Quarry Area Reclan/alion regulates and vuides future sand and gravel harvesting <br /> <br />and gravel quar::y reclamation. 17 'l1,e Specific Plan contains quarry operation phasulg plansftlr <br /> <br />'Iuarfjing operaaol1j~a map showingtt(usable land remaining follo"ing reda...ation of the after quarry <br /> <br />pits reclamation, and a plan-ttlr idcntifyinr future reclaimed land induding uses (i.e.. a chain of lakes, a <br /> <br />recreational trail, and_areas \,l.ieh eo"ld potentially supporti..ng future development). 111e Specific Plan <br /> <br />for these lands. together with the State'" regional significance designation of the.le lands ".I are"j of <br /> <br />regional jignilielll1ce and the Pleasanton!" General Plan Sand and Gravel Harvesting designation, will <br /> <br />effectively protect this valuable resource until the jellt 2030, after "hieh deposiu of'luar::y operators <br /> <br />deplete constmction-grade aggregate deposits within the Pleasanton Planning Area. are 1'I'Ojeeted to be <br /> <br />depletetl <br /> <br />At the center of the County's reclamation efforts is the Chain of Lakes a series of nine existing and <br /> <br />future reclaimed gravel-mining pits. These lakes have the potential to provide storage for and recharge <br /> <br />of potable water. and storage of stonnwater and non-potable water. (See the Public Facilities Element <br /> <br />for a Chain of Lakes water supply discussion under Water and for a flood control discussion under <br /> <br />Stormwater Facilities. Flood Control.) "!1,ese lakes can also provide recreational opportunities to the <br /> <br />Tri-VaUey area. as discussed under Recreational Open Space and under Water Management and <br /> <br />Recreation. below. <br /> <br />15 Zone 7 \'Vater Agency, Strra!H Alanagemenf Alaster Plan, March 2006. <br /> <br />1(. Alameda County Board of Sup"rvisors. .fpecific Plnn fOr / ilJfmJore.Amador Va/fry Qua'!} Ana Redamalioll, adopted Nov. 5. <br /> <br />1981. <br /> <br />17 Ibid <br /> <br />Con 0.''; I"Jl'llU.'T1.I, CC 082906, mOine <br /> <br />VII-13 <br />