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MOUNTAIN HOUSE NEIGHBORHOODS K AND L INITIAL STUDY 5.ENVIRONMENTAL CHECKLIST 16.UTILITIES AND SERVICE SYSTEMS 3) The agreement between the MHCSD and BBID allows BBID to supply more than 9,413 afy to the MHCSD if BBID has excess water available. Projections of all the future demands for BBID are presented in Table 1 of both the WSA and the Written Verification. The projections Indicate that BBID would have 5,896 afy of excess water in the year 2025. Any additional long-term supplies that the MHCSD may require from BBID in excess of the contracted 9,413 afy would need to be secured under a separate or amended agreement with BBID. 4) In addition to BBID-supplied water, portions of the lands included in SPII have a riparian right to use water from Old River. (The Master Plan states that land between the EI Pescado Grant Line and Old River[i.e.,generally north of Byron Road) has riparian water rights amounting to 2,600 afy that could be used on these lands.) 5) Chapter 2 of MHCSD Ordinance 4056 establishes five stages of water allocations(i.e., rationing)that could be enacted to reduce demand during water shortage emergencies. If the actual water demand for SPIT is greater than projected in the WSA or the Written Verification, BBID may not be able to provide enough water at buildout. If actual water consumption proves that this is the case, a supplemental source of supply could be developed. Shea Mountain House LLC owns riparian water rights that are tied to the land based on its prior use for agriculture. One possibility that could increase the water supply for Mountain House would be for Shea to transfer its riparian water rights to the MHCSD. The water that could be withdrawn from Old River under these rights would be allowed to flow downstream and join the waters in the greater San Joaquin Delta system. The -" same quantity of water could then be withdrawn by BBID from the California Aqueduct(which conveys water from the Delta)to supplement the Mountain IJ House community supply by"wheeling"the water back to the MHCSD WTP. This plan could supplement the BBID supply by an estimated 2,600 afy. It should be noted that these riparian rights could be curtailed by DWR during a water shortage in dry years. Master Plan Implementation Measure 12.3.2.a requires that each specific plan subsequent to SPI include a comparison of actual water demand for the Fill community with projected water demand used in the Master Plan. Land uses, the number of dwelling units,and water demands have changed since the last ^ publication of the Master Plan. Nevertheless,SPII does not include the water demand comparison required by the Master Plan because the MHCSD does not yet have sufficient data to make a valid comparison. The MHCSD was to start monitoring water demand when Neighborhoods E and G were completed and occupied. To be meaningful, the study sample must be large and the meter - readings should cover at least one full year to reflect the effects of the different seasons on water consumption (Karam, 2006). As of July 2011,the monitoring by MHCSD was not determined. f (Ball 1) 5-203