Colorado'w Water Supply Future Handout

• Board Meeting Date: 7/20/2010
• Description: Colorado's Water Supply Future
• Board Meetings - Doc Type: Presentation

I
Reconnaissance Level Capital and Operation
and Maintenance Costs
With exception of the Green Mountain concept, which was
assumed to deliver 68,000 acre -feet per year (AFY) in a single
phase, reconnaissance level cost estimates were developed
for each of the concepts described above based on three
options:
• Option 1: delivery of 100,000 AFY constructed in a single
phase
• Option 2: delivery of 250,000 AFY constructed
in a single phase
• Option 3: delivery of 250,000 AFY constructed
with the first phase delivering 100,000 AFY and
the second phase delivering the remaining
150,000 AFY
Key elements for each water supply concept were
identified and evaluated using uniform assumptions
to determine infrastructure requirements and sizing
for the reconnaissance cost estimates. The
following key elements were considered for each
option water rights, firming storage, transmission
facilities (including pipelines, pump stations, and
tunnels), diversion structures, water treatment,
reuse, and engineering, legal and administrative
costs including permitting.
Figure 2 shows the summary of the reconnaissance
level capital costs for each of the concepts. The
range of capital costs for all of the concepts is
$840 million (Green Mountain) to $9.8 billion
(Flaming Gorge Option 3). Although the new supply
development concepts and agricultural transfer
concepts are similar in total capital costs for each of
the options, the relative percentages of
subcomponent capital costs vary. For the
agricultural transfer concepts, the majority of the
capital cost is comprised of water rights
acquisitions. For the new supply development
concepts, the majority of the capital costs are
associated with pipeline and pump stations.
Operation and maintenance costs for each concept
are summarized in Figure 3. Reconnaissance level
annual operation maintenance range from
$29 million per year (Green Mountain )to $273 million per year
(Arkansas Option 3). The variability between concepts is due
primarily to conveyance costs but differences between
conventional treatment (Yampa, Blue Mesa, Green Mountain,
and Flaming Gorge) and reverse osmosis with zero liquid
discharge (South Platte and Arkansas) also contribute to the
variation.
FIGURE 2. SUMMARY OF RECONNAISSANCE CAPITAL COSTS
$10
$9
$8
$2
$6
s $5
n
u $
n $3
$2
$1
$0
FIGURE 3. SUMMARY OF RECONNAISSANCE O&M COSTS
$300
$250
$200
n $1s0
3
0
0
sloo
$so
$0
Yampa South Platte 1 South Platte 2 Arkansas 1 Arkansas 2 Flaming Gorge Blue Mesa Green
Mountain
■ Onlion1: 100.00CArly 60.300Ar /yrfor Greco bloupla n a Opaon 2:250.0GOArlyr- Shrpk Piave ■ Opaar 3: 250,GGoAr!11 -2 Phan,
Yampa South Plane 1 South Platte 2 Arkansas 1 Arkansas 2 Fleming Gorge Blue Mesa Green
Mountain
■Onl on 1:100.000ArNr- C8.G00Arly for Green Mo—uir ■OOlior 2: 250.000Ar /vr- Sirele Phase 0O0-3: 250.000Ar!'yr- 2 Phase,