HomeMy WebLinkAboutUtilities 2013-12-02 Item 2C - Handout Distributed at Meeting - Cascade Water AllianceCASCADE
WATER ALLIANCE
Cascade Water Alliance Presentation
City of Tukwila
City Council Utilities Committee
December 2, 2013
CASCADE
WATER ALLIANCE
Topics
• Major actions taken since last year
• Changes to supply and demand forecasts
• Changes to future water supply strategies and
long -term rate impacts
• 2014 rates
• Changes to water efficiency (conservation
programs)
CASCADE
WATER ALLIANCE
Major Actions Taken Since Last Year
• Seattle contract extension
• Tacoma contract modification
• Covington withdrawal
• Auburn contract
• Bonney Lake contract
CASCADE
WATER ALLIANCE
Supply & Demand Forecasts
f o
CASCADE
WATER ALLIANCE
54
52
50
48
46
44
42
40
38
36
34
Cascade Average Daily Demand (mgd)
2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013
--0— 2004 TS P
Composite
Projection
— 2004
Financial
Forecast
—�— Actual
Demand
CASCADE
WATER ALLIANCE
Annual MGD
260
240
220
200
180
160
140
120
100
80
60
40
20
Shifting Water Demand Forecasts
.
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0
1940 1945 1950 1955 1960 1965 1970 1975 1980 1985 1930 1995 2000
205 2010 2015 2020
Actual Consumption
1967 SWD Forecast
1973 R18C0 Forecast
1980 Complan Forecast Medium
1980 Complan Forecast Medium -low
1985 Complan Forecast Medium
1993 WSP Forecast
1997 Revised Forecast
2001 WSP Forecast
2003 Official Forest
2007 W5 Forecast
Current Forecast
Seattle Public Utilities 4124/12
CASCADE Growth in Population & Water Consumption
WATER ALLIANCE
210
180 —
150
8 120
2
a 90
60 --
1975 1980 1985
Billed
Consum ption
0
co
z
a
0
a
1995 2000 2005
CASCADE Cumulative Water Savings from Conservation
WATER ALLIANCE
30
0 25
2
2 20
E
a)
0
L 15
'E10
0
0
a) 5
L System Operation Improvements
Conservation Programs
• Rates +Code
1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010
CA CA E
WATER ALLID ANCE
Changes to Future Water
Supply Strategy
CASCADE Key Financial Metrics of Supply Scenarios
Base Case: Develop Lake Tapps Supply
Proposed Approach: Postpone Lake
Tapps through Contract Extensions
Need new supply source in 2024 as
Seattle blocks begin to step down. Peak
capacity drops 20 mgd in 2024; 10 mgd
each 5 years thereafter
Extends Cascade 30.3 mgd block;
supplemental block stays at 3 mgd and
also extends. Re -maps the ramp -down of
supply blocks to smaller annual steps
Capital Spending Requirements by Period (uninflated)
2013 -2025
Total 2013 -2055
$649 million
$111 million
$973 million
Avg. Annual Rate Increase 2013— 2020
Avg.Annual Rate Increase 2013 — 2025
Avg. Annual Rate Increase 2013 - 2035
8.7%
Forecast continues
7.9% to improve
$1,062 million
5.2%
Total Present Value of Cascade Member Costs'
2013 -2025
Total 2013 -2055
$595million
$1,456 million
$455 million
$1,253 million
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