FINAL REPORT Evaluation of Seawater Desalination Projects ...
FINAL REPORT Evaluation of Seawater Desalination Projects ...
FINAL REPORT Evaluation of Seawater Desalination Projects ...
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EVALUATION OF SEAWATER DESALINATION PROJECTS<br />
PROPOSED FOR THE MONTEREY PENINSULA<br />
Quality <strong>of</strong> Cost Estimate<br />
The treatment plant capital cost estimate is not very detailed, but the values are considered<br />
reasonable for this size facility. O&M costs are considered to be higher than expected, due to<br />
a high electrical consumption assumption. An adjustment <strong>of</strong> this assumption could reduce<br />
the total cost <strong>of</strong> water by approximately $250 per ac-ft. The costs presented for the SCDP do<br />
not include any costs for pilot studies <strong>of</strong> the treatment process.<br />
5.4 <strong>Seawater</strong> <strong>Desalination</strong> Vessel (SDV)<br />
Capital Cost<br />
Capital costs for the proposed facilities were presented in a summary document provided by<br />
the proponent. The proponent made numerous comments on costs reported in the draft<br />
GEI/B-E report, both updating capital cost information and describing contingencies<br />
included in suppliers estimates. Some <strong>of</strong> these estimates are sharply higher than those<br />
provided to GEI/B-E in early 2007. For example, the estimate for ship purchase and<br />
refurbishment was increased by 95 percent. Proponent’s updated anticipated capital costs are<br />
summarized in Table 8.<br />
Table 8 – SDV 2006-7 Capital Costs<br />
<strong>Seawater</strong> Conversion Vessel -- Proponent's Statement <strong>of</strong> Costs (Seabed Pipeline option)<br />
Size<br />
(mgd)<br />
Unburdened<br />
Capital Cost<br />
Eng, OH,<br />
Legal, Admin<br />
Contingency<br />
Eng, OH,<br />
Legal, Admin<br />
Contingency<br />
Burdened<br />
Capital Cost<br />
Notes<br />
Process Equipment 20 $40,310,000 0.0% 21.6% $0 $8,710,000 $49,020,000 1,2,06<br />
Permitting 25.0% $6,000,000 $1,500,000 $7,500,000<br />
<strong>Seawater</strong> Conversion Vessel $45,980,000 15.5% 25.0% $7,140,000 $13,280,000 $66,400,000 1,3,06<br />
Seabed & Distribution Pipeline 18 $30,630,000 18.5% 25.0% $5,670,000 $9,070,000 $45,370,000 4,07<br />
HDPE Seabed Pipeline 18 $10,800,000 18.5% 25.0% $2,000,000 $3,200,000 $16,000,000<br />
3 MG regulating reservoir $2,109,000 18.5% 25.0% $390,000 $624,750 $3,123,750<br />
10 mgd CAW pump station 10 $2,579,000 18.6% 25.0% $480,000 $764,750 $3,823,750<br />
8 mgd regional pumping station 8 $2,281,000 18.4% 25.0% $420,000 $675,250 $3,376,250<br />
Pipeline to terminal reservoir $2,461,000 18.7% 25.0% $460,000 $730,250 $3,651,250<br />
Regional pipeline $10,398,000 18.5% 25.0% $1,920,000 $3,079,500 $15,397,500<br />
Total 18 $116,920,000 16.1% 24.0% $18,810,000 $32,560,000 $168,290,000<br />
Notes:<br />
1\ Detail is subject to confidentiality agreement<br />
2\ Intake pump station; Strainers/screens; Pretreatment membranes; RO system (pumps, racks, process chemicals, membrane cleaning system); Post treatment ; Membrane<br />
installation<br />
3\ Purchase; Refurbishment; Retr<strong>of</strong>itting; Power generators; Salinity Dispersion<br />
4\ PBS&J April 2007 memo<br />
5\ Reported manufacturers' contingencies are backed-out from the reported capital cost. Manufacturers' contingencies are reported by WSC as 15.9 percent for the process<br />
equipment, and 25 percent for the ship and ship modifications<br />
06\ 2006 cost level<br />
07\ 2007 cost level<br />
Operation and Maintenance Costs<br />
The O&M cost estimate includes power consumption, chemical usage, operation and<br />
maintenance <strong>of</strong> SDV and barges, and membrane replacements. The detailed cost estimate is<br />
Monterey Peninsula Water Management District 5-17
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