Post on 26-May-2020
transcript
Drinking Water Line of Business
March 11, 2014 Discussion
with the Council SPUN Committee
2
1. Then and Now
2. Overview
3. Customer Services & Service Levels
4. Drinking Water Investments
5. Cost of Services
Structure of Presentation for Drinking Water LOB
Water
3
Drinking Water Then: The Great Seattle Fire
• 1888 - mayor proposes Cedar River for public water supply
• Private companies can’t handle demand from population growth
• Special election set for July 1889 on $1 million construction bond
• One month before vote, Great Seattle Fire left downtown in ruins
• Low flow from private companies contributed to the destruction
• Voters overwhelmingly authorized construction of Cedar River Supply
Water
4
Drinking Water Then: Forward-Thinking Utilities
• 1901 - Cedar River pipeline in service.
• Development of protected water supply spurred by typhoid outbreaks.
• Cedar River supply eliminates need to drink contaminated lake water.
• In-city reservoirs constructed.
• Pipeline expanded three times over next 50 years.
• Water service begins to expanding cities east of Lake Washington.
Volunteer Park Reservoir, 1900
Water
5
• South Fork Tolt River (Carnation) added as second source in 1960s
• 100 percent ownership of Cedar Watershed, 66 percent of Tolt Watershed
• Protected from all uses, except tribal hunting
• SPU patrols and manages watershed forests
Drinking Water Now: Two Protected Supply Sources
Chester Morse Lake, Cedar River Watershed
South Fork Tolt River Watershed (Carnation)
Water
Water System
Overview: Drinking Water Service Territory & Infrastructure
6
• 1.3 million customers • Two watersheds • 193 miles of transmission
pipelines • 1,680 miles of distribution
mains • 400 million gallons of water
storage • Many pump stations, valves,
fire hydrants
Water
Seattle Retail Service Area
Wholesale Customers
Watersheds
Overview: Seattle’s Regional Water System
7 Water
Water System Water
Overview: Drinking Water Process from Source to Tap
8 8
Overview: Regulatory Drivers and Commitments
Regulations:
• State Dept of Health
• Safe Drinking Water Act
• Water System Design, including fire flow & pressure
• Water Use Efficiency
• State Dept of Ecology
• Water rights
• Dam safety
Commitments:
• Wholesale water contracts
• Cedar River Habitat Conservation Plan
• Muckleshoot Indian Tribe Settlement Agreement
9 Water
Overview: Water Consumption Over Time
0
20
40
60
80
100
120
140
160
180
200
220
240
260
0
100,000
200,000
300,000
400,000
500,000
600,000
700,000
800,000
900,000
1,000,000
1,100,000
1,200,000
1,300,000
1975
1977
1979
1981
1983
1985
1987
1989
1991
1993
1995
1997
1999
2001
2003
2005
2007
2009
2011
Total Consumption
P
Population
Po
pu
lati
on
Co
nsu
mp
tio
n in
Millio
ns o
f G
allo
ns p
er
Day
(An
nu
al A
vera
ge)
10 Water
0
25
50
75
100
125
150
175
200
225
250
275
300
Oct
No
v
De
c
Ja
n
Feb
Ma
r
Ap
r
Ma
y
Ju
n
Ju
l
Au
g
Se
p
Oct
Ave
rag
e C
on
su
mp
tio
n i
n M
GD
Ending Date for Week
24-hr Consumption, 7-Day Moving Average
WY 2014 WY 2013 Average WY 1999-2008 Average WY 1994-2000 Average WY 1985-1991
Through March 3, 2014
Notes: A. 7-day moving average is calculated using data from the day of and the previous 6 days.
0
50
100
150
200
250
300
350
1975 1980 1985 1990 1995 2000 2005 2010
Ga
llo
ns p
er
Pe
rso
n p
er
Day
Peak Day & Annual Average Consumption in GPD per PersonSeattle Regional Water System: 1975-2013
Peak Day
Annual Average
170 gpd
91 gpd
151 gpd
Seattle Public Utilities
1992 Drought
Portion of Rate Increases Due to
Declining Consumption:1983-2013
$1.10$1.47
$2.60
$3.49$0.32
$1.21
$2.87
$1.10
$1.79
$3.82
$6.36
$0
$1
$2
$3
$4
$5
$6
$7
1983 1993 2003 2013
Ave
rag
e R
ate
Pe
r C
CF
in
Co
ns
tan
t 2
01
3 $
s
Impact of Declining Consumption
Average Rates with Constant per Capita Consumption
45% of rate increases since 1983 due to declining per capita consumption
Average Residential Rates and Bills
in Constant 2013 $s: 1985-2013
$0
$10
$20
$30
$40
$50
$60
$70
$80
$0
$1
$2
$3
$4
$5
$6
$7
$8
198
5
198
6
198
7
198
8
198
9
199
0
199
1
199
2
199
3
199
4
199
5
199
6
199
7
1998
199
9
200
0
200
1
2002
200
3
200
4
200
5
200
6
200
7
200
8
200
9
201
0
201
1
201
2
201
3
Ave
rag
e M
on
thly
Bil
ls in
Co
ns
tan
t 2
01
3 $
s
Ave
rag
e R
es
ide
nti
al R
ate
s/C
CF
in
Co
ns
tan
t 2
01
3 $
s
Average Rate per CCF
Average Monthly Bill
Drinking Water Customer Services & Service Levels Regional System • Supply drinking water that meets or exceeds Department of Health regulations • Respond to 90 percent of high priority drinking water problems within one
hour • Provide in-stream water for fish and meet other tribal, regional, state, and
federal commitments • Achieve goals for water conservation & leakage loss
Retail System • Meet state requirements for water system pressure • Limit yearly drinking water outages totaling more than four hours to less than 4
percent of retail customers
Wholesale Customers • Meet pressure and flow requirements of wholesale drinking water contracts • Limit unplanned outages in transmission system to within the maximum agreed
duration
Water 15
Are We Meeting Our Service Levels?
The short answer is YES The longer answer is: • We have extremely high quality drinking water
that we will continue to maintain and protect
• We have an abundant supply of water – enough until 2060 and beyond – for people and fish
• We have a transmission & distribution system that is very reliable
• We respond quickly when problems arise
• We meet our conservation and leakage loss goals
Water 16
Water System
* Cedar Habitat Conservation Plan
Drinking Water Investments: Where We Are in Our Investment Cycle (Graphic Uses 2011 Data)
17
$0
$20
$40
$60
$80
$100
$120
($ in
Mill
ion
s)
Cedar Treatment Facility
CHCP*
Tolt Treatment Facility
Reservoir Coverings
Debt Service
CIP
Water
Drinking Water Investments: Completed
Water 18
Tolt & Cedar Water Treatment Facilities
19
Tolt Water Treatment Facility
Water
Covered Reservoirs
20
Beacon Reservoir covering protected public health and added open space
Lincoln Reservoir covering in Cal Anderson Park
Water
Today
System Control Center Improvements 2004
Drinking Water Investments: Future
Water 22
Morse Lake Pump Plant
Chester Morse Lake on Cedar River
23 Water
Watermain Replacement & Rehab
24
University Village water main break - 2013
Water
Watermain Replacement and Rehab - continued
25
Extreme case of tuberculation
Overview: Water Distribution Main Age
26 Water
Cost of Services: 2015-2020 Baseline (= current services + meeting firm regulatory requirements)
Average annual baseline increase = 4.3% from 2015-2020
27 Water
Cost of Services
In 2020 baseline, average cost per gallon of water delivered to your home or business is slightly more than a penny a gallon
Typical residential monthly bill in 2014 = $38.93
Typical residential monthly bill in 2014 for household on low income rate assistance = $19.46
28 Water
Trends in Utility CPI