Presented at the Texas Water Conservation Association 68th Annual Convention Dallas, Texas March 8, 2012 by Jo M. (Jody) Puckett, P.E. www.twca.org

1. The Drought’s
Affect on
Dallas Water
Utilities
Texas Water Conservation Association
68th Annual Convention
Dallas, Texas
March 8, 2012
Jo M. (Jody) Puckett, P.E.

2. Dallas Water Utilities
• The Water Department was founded in 1881
• The Water Department is funded from water
and wastewater revenues, and does not
receive tax dollars
• Approximately 1,500 employees today
Construction of White Rock Dam 1911
Record Crossing Elm Fork of the Trinity River 1896
2

3. DWU Water Supply Management
3

4. DWU Utility Services
• Treated Water Service
~1.2 million - Dallas (retail)
~1.0 million – 23 wholesale
customer cities
• Untreated Water Service
~207,000 – 4 wholesale DENTON COLLIN
customer cities TARRANT ROCKWALL
• Total Population served for
Water 2.4 million LEG EN D
DALLASRETAIL DALLAS
KAUFMAN
SERVIC E AREA
WHOLESALE
• Wastewater Service
CUS MERS
TO
~1.16 Million Dallas (retail)
TREAT WAT
ED ER
C USTOMER
~104,500 – 11 customer cities UNTREAT WAT
ED
C USTOMER
ER
~1.26 million – Total population TREATED & UNTREATED
WATER CUST OMER
DALLAS
ELLIS
21a p ril10
• 699 square mile service
area
4

5. Dallas Water Utilities Assets
Water Assets Wastewater Assets
• 7 surface reservoirs, (6 • 2 Wastewater treatment
connected and 1 currently plants with a combined
not connected) capacity of 260 MGD
• 5166 miles of water mains • 15 wastewater pump stations
• 3 Surface Water Treatment • 4,364 miles of wastewater
Plants with a combined main
capacity of 900 MGD with an
• Value of wastewater assets
additional 100 MGD by 2015
$1.883 Billion
• 22 water pump stations
• 9 elevated and 12 ground
storage tanks
• Value of water assets $2.454
Billion
Combined water and wastewater system outstanding debt $2.923 Billion

6. How Dallas’ System Water is
Used
10.5%
3.4%
48.8%
37.3%
Retail Wholesale Unbilled Authorized Water Loss
Represents Total Water Use for FY04 – FY08; Dallas serves a total population of 2.3M people 6
Source: City of Dallas Water Conservation Five-Year Strategic Plan Updated June 2010

7. DWU Water Conservation Program Timeline
City Council adopted first
Five-Year Water
Council adopted
Conservation Strategic an updated Five-
City of Dallas water Plan including incentives Year Strategic
conservation program Plan
consisted primarily of
public education and
outreach
1980 2001 2005 2007 2010
GPCD Comparisons* Time of day
Council passed an ordinance watering restrictions
prohibiting lawn and Not the Whole Story expanded to April
landscape water waste; through October
City 2008 Gallons 2008 annually
adding time of day watering;
per Capita Residential
and added additional rate tiers
per Day GPCD
(GPCD)
Rain sensor rebate
Houston 134 65
program established
San Antonio 149 92 *Source: Texas Water
Development Board
Dallas 213 95 2012 Water Plan
Austin 171 102
7
Fort Worth 192 75

8. Conservation Strategic Plan Programs
City Leadership & Commitment
Reduce water loss through additional leak detection
Reduce water loss through improved metering accuracy
Voluntary twice weekly watering
Industrial, Commercial and Institutional (ICI) Water-efficient Equipment Rule
Water-wise landscape design requirements
Texas High Efficiency Toilet (HET) Law
Education and Outreach Initiatives
ICI Hospitality Program
ICI Customer Water Audits
ICI Training Programs
ICI Business Partnership/Stakeholders
Rebates and Incentives
Enhanced residential toilet incentives
ICI Financial Incentive Program
Residential Irrigation Incentive Program
Residential clothes washer rebate
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Source: City of Dallas Water Conservation Five-Year Strategic Plan June 2010

9. Water Consumption Trend
9

10. 10
Water Supply Benchmarks – 75% capacity remaining after 18 months and 50% remaining after 3 ½ years

11. Water Use and 2012 Water System
Restriction
Water Consumption
FY10 and FY11
750
650
MGD
550
450
350
250
11/12
11/26
10/1
1/21
2/18
3/17
3/31
4/14
4/28
5/12
5/26
6/23
7/21
8/18
9/15
9/29
10/15
10/29
12/10
12/24
1/7
2/4
3/3
6/9
7/7
8/4
9/1
FY10 FY11 85% Available Treatment Capacity Treatment Capacity During Construction
Note: Graph shows that water restrictions would be needed in FY10 and FY11. 11
11
FY10 was a relatively wet year; FY11 was hot and dry.

12. Drought Measure Implementation
• June 2010 - Dallas’ Drought
Contingency Plan adopted by
the Council and submitted to
the State
• August 2011 - Dallas called for
customers to voluntarily
restrict outside watering
1950s Drought
• December 12, 2011 - Dallas
entered Stage 1 of its Drought
Contingency Plan
• February 8, 2012 – Dallas
extended Stage 1 of its
Drought Contingency Plan
12

13. Current Drought Conditions -
Drought Monitor
February 28, 2012
Jan 18, 2011 April 5, 2011 June 28, 2011 Sept 13, 2011 Nov 22, 2011
13
6
Source: National Drought Mitigation Center

14. QUESTIONS?