CAP Energy Needs Tom McCann Ron Lunt October 17, 2013
CAP Energy NeedsTom McCannRon LuntOctober 17, 2013
Central Arizona Project
• 336‐mile aqueduct
• 15 pumping plants
• 8 inverted siphons, 3 tunnels
• New Waddell Dam & Lake Pleasant
• 24.3% of Navajo Generating Station
CAP Energy Use
• CAP is largest power user in Arizona
• 2.8 million MWh needed to deliver 1.6 million acre‐feet
• Nearly 3000 feet of lift from Lake Havasu to terminus
CAP Elevation Profile
-15 35 85 135 185 235 285 335
Distance (miles)
400
900
1,400
1,900
2,400
2,900
Ele
vatio
n (fe
et)
Mark Wilmer
Bouse Hills
Little HarquahalaHassayampa
Waddell/Lake Pleasant
Lake Havasu
Brady
Picacho
Red Rock
Twin Peaks
Sandario
Brawley
San Xavier
Black Mountain
La Paz Maricopa Pinal Pima
Phoenix AMA Pinal AMA Tucson AMA
Snyder Hill
Salt Gila
1.5
MA
F
1.0
MAF
0.5
MAF
0.25
MAF
0.12
5 M
AF
Volume Through Segment*
* 2009
Energy Use by Pumping Plant
0
200,000
400,000
600,000
800,000
1,000,000
1,200,000
1,400,000
1,600,000
1,800,000
2,000,000
Annual MWh
CAP Needs Base Load Power• CAP system design
– Requires operation at constant volume– Requires continuous operation (24/7) to deliver full water entitlements
• CAP customers require deliveries 24/7• Repeated starts/stops increase cost and risk
– Pump/motor maintenance– Potential canal damage due to constantly changing water levels
– Reduced system reliability
CAP Energy Usage
0
50
100
150
200
250
300
350
400
450
500
0% 25% 50% 75% 100%
MW
% of annual hours
Base Load Requirement
CAP Generation Resources
• Navajo Generating Station• Hoover• New Waddell• Market
Hoover Energy• Contract with APA, expires in 2017
– Hoover B energy• Up to 176,768 MWh (6% of CAP needs)
• Provides ramping, regulation and reserves for CAP loads (not readily available from market)
– Hoover C energy• Additional energy during high flows (359,519 MWh in 1999)
• CAP also diverts more water then, so needs increase
– Includes transmission rights
NGS Energy
• CAP reserves NGS energy to meet pumping needs– Real‐time scheduling & tagging performed by AEPCO/APM
• Unreserved NGS energy is sold by Western Area Power Administration as Navajo Surplus– Net proceeds assist CAP repayment– Value dependent on energy market
CAP Power Management
• Lake Pleasant provides regulatory storage for CAP
• Allows CAP to optimize pumping seasonally– Pump from Colorado River to fill lake in winter when energy costs are lower
– Release from lake in summer when energy costs are higher
CAP Transmission Portfolio
• Navajo Transmission• CAP Transmission• Contract rights
– Intertie– Parker‐Davis
• Network Service– APS– SRP
NGS
WESTWING
McCULLOUGH
DAVIS
PARKER
LIBERTY
MEADHOOVER
NEWWADDELLHAVASU
BOUSE
LITTLEHARQUAHALA
HASSAYAMPA
PINNACLE PEAK
ED‐2
SAGUARO
DEL BAC
RATTLESNAKE TAP
BRADY
PICACHO
RED ROCK
TWIN PEAKS
SANDARIO
BRAWLEY
SAN XAVIERSNYDER HILL / BLACK MOUNTAIN
ED‐5
ED‐4
NAVAJOCAP
INTERTIEPARKER DAVIS
SALT GILA
HARCUVAR
PALO VERDE
SPOOK HILLROGERS
COOLIDGE
TUCSON
THUNDERSTONE
RACEWAY
APS
Las Vegas Page
BuckeyeSun City
Mesa
North Scottsdale
Avra Valley Tucson
Parker
SUN VALLEY
CRYSTAL
MORGAN
CAP Transmission Map
NGS Replacement Considerations
• Type of generation– CAP needs significant base load resource
• Cost– Capital cost of replacement generation
• CAP repayment impact– NGS provides $25M±/year toward CAP repayment
• Transmission needs– CAP transmission system is designed to move electricity from NGS to CAP pumps
Questions?