Presentation on the Current Drought and Rowlett`s Response

Presentation on the Current Drought and Rowlett’s Response
City Council Worksession
October 18, 2011
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The Problem
On 9‐28‐2011 NTMWD initiated Stage 3, effective 11‐1‐11
Goal = 10% reduction in water use based on 2011 water year (Aug‐Jul)
Lake Lavon is at 52% of storage capacity & cannot pump water from Lake Texoma 28% due to zebra mussels
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NTMWD Press Release
In addition to the extreme temperatures and continuing drought conditions, NTMWD currently can’t pump water from Lake Texoma due to the presence of invasive zebra mussels. Lake Texoma
normally provides almost a quarter of NTMWD’s raw water supply. As of Monday, September 26, 2011, Lake Lavon’s elevation was down over 11 feet, and is at 52% of useable capacity. In addition, as of the most recent measurement, NTMWD’s Lake Chapman water supply is at 35% due to the continued drought.
Picture from Dallas Morning News 09/21/2011 “Drought could mean more water restrictions in Dallas area cities”
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Source: Dallas Morning News 09/25/2011 “Dallas‐Fort Worth area faces obstacles in tapping Oklahoma rivers for water”
http://www.dallasnews.com/news/community‐news/dallas/headlines/20110925‐dallas‐fort‐worth‐area‐faces‐obstacles‐in‐tapping‐oklahoma‐rivers‐for‐
water.ece?ssimg=328484#ssStory328489
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on Lake Lavon dam looking SE
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Lake Lavon Pump Station looking NE
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Strategies approved by NTMWD Board to Address Shortages
• Implement Drought Contingency Plan
Stage 3 November 1, 2011
Stage 4 if Lake Lavon falls below 475’
•
•
•
•
•
Negotiate & purchase water from Dallas
Begin engineering for Lake Texoma pipeline
Accelerate pipeline from main stem of Trinity
Pursue restoration of Lake Texoma pumping
Monitor Lake Lavon elevations
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Implement Drought Contingency Plan
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Implement Drought Contingency Plan
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Negotiate & purchase water
from Dallas
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Negotiate & purchase water
from Dallas
11
Begin engineering for
Lake Texoma pipeline
12
Begin engineering for
Lake Texoma pipeline
13
Begin engineering for
Lake Texoma pipeline
14
Accelerate pipeline from
main stem of Trinity
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Accelerate pipeline from
main stem of Trinity
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Rowlett did not participate in Stage 1 & Stage 2 because its daily per capita use is 39% lower than the NTMWD member cities!
Daily Per Capita Usage (gallons) for
NTMWD Member Cities ‐vs‐ Rowlett
350
300
250
200
150
100
50
‐
Sep
Oct
Nov
Dec
Jan
Rowlett
Feb
Mar
Apr
May
Jun
Jul
Aug
Average‐Member Cities Only
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Over a 12 month period ending August 31, 2011, Rowlett had the third lowest per capita use out of all NTMWD member cities!
Daily Per Capita Usage (gallons) for NTMWD Member Cities ‐vs‐ Rowlett
350
300
250
200
150
100
50
‐
12 mo Avg
Member City Avg
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Rowlett has a
Drought Contingency Plan
The City of Rowlett’s Drought Contingency Plan (the “Plan”) already outlines a plan of action for each stage that NTMWD implements. The purpose of the Plan is as follows:
• To conserve the available water supply in times of drought and emergency.
• To maintain supplies for domestic water use sanitation and fire protection.
• To protect and preserve public health welfare and safety.
• To minimize the adverse impacts of water supply shortages.
• To minimize the adverse impacts of emergency water supply conditions.
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The table below outlines the strategies requested by NTMWD and those recommended by City of Rowlett.
NTMWD
Strategies
Initiate Stage 3 of the Member Cities
and Customers drought
contingency and water emergency
response plans no later than
November 1.
Limit landscape watering with
sprinklers or irrigation systems to
once every two weeks between
November 1 and March 31 and
eliminate watering from 10 AM to 6
PM. Residents should check with
their city water department for
specific city restrictions.
Rowlett Strategies
(exceptions noted in red)
Agrees with Rowlett Ordinance (Stage
3)
Stage 3 of the Rowlett Ordinance
calls for landscape watering once
every 7 days (see attached map)
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The table below outlines the strategies requested by NTMWD and those recommended by City of Rowlett.
NTMWD
Strategies
Foundations, new landscaping, new
plantings (first year) of shrubs, and
trees may be watered for up to two
hours on any day by a hand-held
hose, a soaker hose, or a dedicated
zone using a drip irrigation system.
Wait until the current drought has
passed before establishing new
landscaping and no hydroseeding,
hydromulching or sprigging
allowed.
Rowlett Strategies
(exceptions noted in red)
Agrees with Rowlett Ordinance (Stage
3)
Agrees with Rowlett Ordinance (Stage
3)
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The table below outlines the strategies requested by NTMWD and those recommended by City of Rowlett.
NTMWD
Strategies
Do not drain and refill swimming
pools except to replace normal
water loss.
Halt non-essential city government
water use including street cleaning,
vehicle washing, operation of
ornamental fountains, etc.
Rowlett Strategies
(exceptions noted in red)
Agrees with Rowlett Ordinance (Stage
3)
Agrees with Rowlett Ordinance (Stage
2)
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The table below outlines the strategies requested by NTMWD and those recommended by City of Rowlett.
NTMWD
Strategies
Accelerate public education efforts
on ways to reduce water usage by
10%.
Initiate engineering studies to
evaluate alternatives should
conditions worsen.
Rowlett Strategies
(exceptions noted in red)
Agrees with Rowlett Ordinance (Stage
1 & 2)
Not necessary. Ordinance already
makes provisions if NTMWD moves
to Stage 4
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The table below outlines the strategies requested by NTMWD and those recommended by City of Rowlett.
NTMWD
Strategies
Rowlett Strategies
(exceptions noted in red)
Waterview Golf Course utilizes
untreated water from a separate City
of Dallas (Lake Ray Hubbard)
Watering of golf courses using
agreement; therefore, Rowlett will
treated water is prohibited except as
not implement this measure.
needed to keep greens and tee
In the event that water from that
boxes alive.
source is no longer available, the
existing NTMWD strategies will be
implemented.
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10% Water Reduction Goal
NTMWD Annual Deliveries vs the Annual Minimum Use and FY2012 Target Use
FY2012 Revenue Impact could be as high as $1.1 million.
3,500
3,000
2,500
2,000
Target = 2.6 billion gals
1,500
1,000
2004
2005
2006
2007
Delivered
2008
Target
2009
2010
Min
2011
2012
However, budget is already based on around 2.6+/‐
billion gallons so impact may be less.
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Next Steps
• Notify public:
Use of website and RTN15
Provide educational materials on City website
• Notify staff to implement City’s responsibilities
• Establish tracking & reporting mechanism
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