(GP/GT) for Additional Water Supply in the Lower Rio Grande

111-42
EXHIBIT llID-4
PRO-FORMA CALCULATIONS FOR REVERSE OSMOSIS PROCESS (RO)
USING GPIFI' POWER @ SO.32lKWHR
Cost Elements
Capital
COStsf($x 1 ()()Q)
Annual
Costs' ($x I ()()Q)
Water Costs,
$'1.000 gal.
Capital Costs
1.
2.
3.
4.
5.
Plant and Equipment(2)
Feedwater Pretreatment
Feedwater SupplyOJ
Water Transmission
Brine Disposal
$3.990
o
1.760
820
1.279
$457.54
o
201.82
94.03
146.67
$0.2773
o
0.1223
0.0570
0.0889
Total Capital Costs
$ 7,849.0
$ 900.06
$ 0.5455
Operation and Maintenance Costs
6. Operating and Maintenance Labor
a. Plant and Equipment(2)
b. Feedwater Pretreatment
c. Feedwater Supply
d. Water Transmission
e. Brine Disposal
Total Operating and Maintenance Labor
7. Other Operation and Maintenance Costs
a. Payroll Extras (15% of 6a)
b. General and Administrative Overhead (30% of 6a + 7a)
c. Supplies and Maintenance Materials
d. Membrane Assembly or Replacement Tubing(2)
e. Chemicals(2)
f. Fuel or Steam
g. Electric Power
Plant and Equipment(2)
Feedwater Supply
Water Transmission
Total Other Operation and Maintenance Costs
Total Operation and Maintenance Costs
Total Water Cost (fotal Capital Plus 0, & M. Costs)
$'1.000 gal.
0.060
o
.029 .
n r,u)
0.21
$ 0.299
0.009
0.021
0.03
0.165
0.039
n.el l )
o
0.104
0.051
$ 0.419
$ .718
$ 1.2635
(1) none required
(2) Based on recent infonnation from lonics. Inc., cost infonnation includes effect of 80.5%/19.5% blending; therefore. actual plant size equal to
4 MGD. and a water recovery factor of 82.5%. A factor of 20% has been added to cover indirect capital costs comprised of interest durin!!
construction. engineering and contingencies. Also. a factor has been added for land COlt. No 20% factor added for M&O related costs
(3) Based on a recent study by R.W. Harden Assoc. Total of 11 wells and a land coat factor added.