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4.I Water Resources

Table 4.I-6

(a)
Projected Multiple-Dry Year Supplies And Demands
Supply (af)
Water Supply Sources 2010 2015 2020 2025 2030
Existing Supplies
Wholesale (Imported) 47,017 46,317 45,277 44,477 44,277
SWP Table A Supply (b) 32,900 32,200 31,500 30,700 30,500
Buena Vista-Rosedale 11,000 11,000 11,000 11,000 11,000
Nickel Water - Newhall Land 1,607 1,607 1,607 1,607 1,607
Flexible Storage Account (CLWA) (c) 1,170 1,170 1,170 1,170 1,170
Flexible Storage Account (Ventura County) (c) 340 340 0 0 0
Local Supplies
Groundwater 47,500 47,500 47,500 47,500 47,500
Alluvial Aquifer 32,500 32,500 32,500 32,500 32,500
Saugus Formation (d) 15,000 15,000 15,000 15,000 15,000
Recycled Water 1,700 1,700 1,700 1,700 1,700
Total Existing Supplies 96,217 95,517 94,477 93,677 93,477
Existing Banking Programs
Semitropic Water Bank (c) 12,700 0 0 0 0
Rosedale-Rio Bravo (e) (f) 5,000 15,000 15,000 15,000 15,000
Semitropic Water Bank – Newhall Land (g) 4,950 4,950 4,950 4,950 4,950
Total Existing Banking Programs 22,650 19,950 19,950 19,950 19,950
Planned Supplies
Local Supplies
Groundwater 6,500 6,500 6,500 6,500 6,500
Restored wells (Saugus Formation) (d) 6,500 6,500 5,000 5,000 5,000
New Wells (Saugus Formation) (d) 0 0 1,500 1,500 1,500
Recycled Water (h) 0 1,600 6,300 11,000 15,700
Recycled Water - Newhall Ranch 0 1,500 2,500 3,500 5,400
Total Planned Supplies 6,500 9,600 15,300 21,000 27,600
Planned Banking Programs
Additional Planned Banking (f) (i) 0 5,000 15,000 15,000 15,000
Total Planned Banking Programs 0 5,000 15,000 15,000 15,000
Total Existing and Planned Supplies and Banking 125,367 130,067 144,727 149,627 156,027
Total Estimated Demand (w/o conservation) (j) (k) 110,100 120,300 128,900 141,200 152,100
Conservation (l) (9,500) (10,700) (11,700) (13,100) (14,200)
Total Adjusted Demand 100,600 109,600 117,200 128,100 137,900

a Supplies shown are annual averages over four consecutive dry years (unless otherwise noted).
b SWP supplies are calculated by multiplying CLWA's Table A Amount of 95,200 af by percentages of average deliveries projected to be
available during the worst case four-year drought of 1931-1934 as provided in Tables 6-5 and 6-14 of DWR's "State Water Project
Delivery Reliability Report 2007." Year 2030 figure is calculated by multiplying by DWR’s 2027 percentage of 32%.
c Based on total amount of storage available divided by 4 (4-year dry period). Initial term of the Ventura County entities' flexible
storage account is ten years (from 2006 to 2015).
d Total Saugus pumping is the average annual amount that would be pumped under the groundwater operating plan, as summarized in
Table 3-6 of the 2005 UWMP ([11,000+15,000+25,000+35,000]/4).
e
CLWA has 64,900 af of recoverable water as of 12/31/07 in the Rosedale-Rio Bravo Water Banking and Recovery Program.
f
Average dry year period supplies could be up to 20,000 af for each program depending on storage amounts at the beginning of the dry
period.
g
Delivery of stored water from the Newhall Land Semitropic Groundwater Bank requires further agreements between CLWA and
Newhall Land.
h Recycled water supplies based on projections provided in CLWA's 2005 UWMP Chapter 4, Recycled Water.
i Assumes additional planned banking supplies available by 2014.
j
Assumes increase in total demand of 10 percent during dry years.
k Demands are for uses within the existing CLWA service area. Demands for any annexations to the CLWA service area are not
included.
l
Assumes 10 percent reduction on urban portion of total normal year demand resulting from conservation best management practices
([urban portion of total normal year demand x 1.10] * 0.10), as discussed in CLWA's 2005 UWMP, Chapter 7.

Source: Ford, Jeff, Water Resources Planner. Castaic Lake Water Agency, 2008.
County of Los Angeles Department of Regional Planning Skyline Ranch Project
PCR Services Corporation July 2009

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PRELIMINARY WORKING DRAFT – Work in Progress