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Ordinance Amendments:Ordinance Amendments:
10 AM to 6PM irrigation restriction will remain in effect year round10 AM to 6PM irrigation restriction will remain in effect year round
An administrative fee may be assessed for violations by the Director of An administrative fee may be assessed for violations by the Director of
Public Works if such fee is approved by the City CouncilPublic Works if such fee is approved by the City Council
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Background:Background:
In 2006 Council adopted Ordinance 895 implementing water In 2006 Council adopted Ordinance 895 implementing water
conservation measures required by Southlake’s contract with the City of conservation measures required by Southlake’s contract with the City of
Ft WorthFt Worth
Ft Worth recently amended their ordinance which means that all Ft Worth recently amended their ordinance which means that all
wholesale customer cities do the samewholesale customer cities do the same
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Key Elements of the 2006 ordinance:Key Elements of the 2006 ordinance:
Outdoor watering prohibition Outdoor watering prohibition --10 a.m. to 6 p.m. 10 a.m. to 6 p.m. --June 1 to September 30June 1 to September 30..
exception exception --hand held hose or soaker hosehand held hose or soaker hose
New nonNew non--residential irrigation systems installed past effective date must residential irrigation systems installed past effective date must
include rain and freeze sensors.include rain and freeze sensors.
NonNon--residential irrigation systems residential irrigation systems --rain and freeze sensors inspection required rain and freeze sensors inspection required
annually.annually.
Existing nonExisting non--residential irrigation systems residential irrigation systems --must include rain and freeze must include rain and freeze
sensors by June 2007. sensors by June 2007.
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Ordinance Amendments:Ordinance Amendments:
10 AM to 6PM irrigation restriction will remain in effect year round10 AM to 6PM irrigation restriction will remain in effect year round
An administrative fee may be assessed for violations by the Director of An administrative fee may be assessed for violations by the Director of
Public Works if such fee is approved by the City CouncilPublic Works if such fee is approved by the City Council
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Item 4E is a request by Martin Prinz of 1780 N. Kimball Avenue for approval of
a zoning change and concept plan from “AG” to “SF-30” for the construction of
a new residence.
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The property is currently zoned AG –Agricultural District
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The Southlake 2025 Future Land Use Designation is Medium Density
Residential.
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This is an aerial photo of the area. Yates Corner and self storage units are
located immediately to the south and a Grapevine residential neighborhood is
across Kimball Avenue from the site.
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This is a view looking north at the property.
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A View looking east at the property.
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And a view looking west at the property. Mr. Prinz will be demolishing his
existing home and constructing a new one in its place.
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This is survey of existing conditions provided by the applicant.
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And this is the proposed concept plan.
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The concept plan shows the applicant’s ideal location for their actual house
footprint but indicated to staff that some flexibility may be necessary; therefore
a somewhat larger building envelope has been identified in case the applicant
decides to shift the location of the house.
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This is the applicant’s tree conservation plan. The applicant has indicated that
he intends to preserve as many trees as possible on the lot, but with the
demolition of the existing home and driveway and the uncertainty of the exact
location of the new home and site grading issues, the applicant has identified
trees to be removed in red and marginal trees—or trees that they will try to
save—in blue. As you can see there are a number of trees lining Kimball
Avenue that will be saved…
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And those trees screen the property fairly well. This is a view looking north
along Kimball at the property.
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And this is a view looking south along Kimball. You can see the existing home
to the right.
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This is a septic system plan provided by the applicant and prepared by a
registered sanitarian. After dedication of right-of-way, the lot is approximately
800 square feet short of one acre. So Mr. Prinz requested and was granted a
variance to allow an on-site sanitary sewage facility on a lot of less than 1-
acre.
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And this is the plat showing that is currently under staff review.
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As mentioned, the net acreage of the property after Right-Of-Way dedication is
just under one acre and the applicant is requesting SF-30 zoning.
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Ordinance Amendments:Ordinance Amendments:
10 AM to 6PM irrigation restriction will remain in effect year round10 AM to 6PM irrigation restriction will remain in effect year round
An administrative fee may be assessed for violations by the Director of An administrative fee may be assessed for violations by the Director of
Public Works if such fee is approved by the City CouncilPublic Works if such fee is approved by the City Council
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Background:Background:
In 2006 Council adopted Ordinance 895 implementing water In 2006 Council adopted Ordinance 895 implementing water
conservation measures required by Southlake’s contract with the City of conservation measures required by Southlake’s contract with the City of
Ft WorthFt Worth
Ft Worth recently amended their ordinance which means that all Ft Worth recently amended their ordinance which means that all
wholesale customer cities do the samewholesale customer cities do the same
7373
Key Elements of the 2006 ordinance:Key Elements of the 2006 ordinance:
Outdoor watering prohibition Outdoor watering prohibition --10 a.m. to 6 p.m. 10 a.m. to 6 p.m. --June 1 to September 30June 1 to September 30..
exception exception --hand held hose or soaker hosehand held hose or soaker hose
New nonNew non--residential irrigation systems installed past effective date must residential irrigation systems installed past effective date must
include rain and freeze sensors.include rain and freeze sensors.
NonNon--residential irrigation systems residential irrigation systems --rain and freeze sensors inspection required rain and freeze sensors inspection required
annually.annually.
Existing nonExisting non--residential irrigation systems residential irrigation systems --must include rain and freeze must include rain and freeze
sensors by June 2007. sensors by June 2007.
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Ordinance Amendments:Ordinance Amendments:
10 AM to 6PM irrigation restriction will remain in effect year round10 AM to 6PM irrigation restriction will remain in effect year round
An administrative fee may be assessed for violations by the Director of An administrative fee may be assessed for violations by the Director of
Public Works if such fee is approved by the City CouncilPublic Works if such fee is approved by the City Council
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Ordinance Amendments:Ordinance Amendments:
Administrative fee for violationAdministrative fee for violation
may be assessed by the Director of Public Works may be assessed by the Director of Public Works
if approved by the City Councilif approved by the City Council
No fee established by Ft. WorthNo fee established by Ft. Worth
No Southlake fee recommended at this timeNo Southlake fee recommended at this time
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As you can see, population projections are anticipated to continue growing for
our region during the next 25 years.
Tarrant County alone is expected to grow by 60%, yielding a population of
almost 2.3 million people.
CLICK
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As the population grows, so will the amount of water that we need
as a region.
This is a busy chart. The important thing to take away from this
chart is the black solid line represents the growth in water
consumption for our region.
We expect that that growth in the demand of water will continue to
rise unless we begin to reduce the individual per capita
consumption rate. Therefore, water conservation efforts are
essential to guaranteeing that we have the water we need in the
future when we turn on our taps.
The top black wavy line is the actual water use each year since 1971. The straight line
is the average growth. We doubled our use from 1971 to 1993.
The blue line shows water used from the West Fork. Fort Worth has the right to take
100,000 acre feet from the West Fork and has done so since the 1960s. During
drought, when the West Fork reaches half capacity, they must reduce their take to
46,000 acre feet and treat more east Texas water. During the wet years of the late
80s and early 90s, when Richland was added, their use was a little less. The additional
supply for our customers is from the east Texas reservoirs and the pumped delivery
will continue to increase.
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As you can see from the chart on the screen, the amount of water that we
have consumed over the past 3 years has grown significantly. We must
realize that this chart represents a period of low rainfall and a continuing
drought.
It impresses upon us the need that we will have to be judicious with our
consumption of water, especially in times of drought conditions.
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Pressure Plane serving the remainder of the city. The low pressure plane.should help in our ability to keep up with demand in the reducing the demand on the low pressure plane. This
increased the size of the high pressure plane; thus, During this past Fall and Winter, Public Works staff has experience critical shortages over the past Summer.pressure plane and it
is also the one that we have city. The larger of the 2 pressure planes is the low results from elevation differences in various parts of the requirement to operate the system on 2 pressure
planes majority of the city.serve the low pressure plane which provides water to the Bicentennial, Miron and Dove Elevated Storage Tanks
The City of Fort Worth produces potable drinking water
from several raw water sources such as Eagle Mountain
Lake and Benbook Lake, owned by the Tarrant Regional
Water District. The City of Southlake receives potable
drinking water from the City of Fort Worth through 2
pipelines.
One pipeline is referred to the Caylor Pump Station line.
This is the 42-inch pipeline that was completed and placed
into service last year. The second pipeline is referred to as
the Alta Vista line. Both of these pipelines come into the
western portion of the city and feed 2-5 MG Ground
Storage Tanks. These are the storage tanks located at the
northeast corner of Pearson and FM 1709.
From there, several pumps pump the water in one of two
directions. Some of the water is pumped to the Florence
Elevated Storage Tank and serves the High Pressure
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Plane. The remaining water is pumped into the Low
The State of Texas requires that all water systems which
serve more than 3300 connections adopt a Water
Conservation and Drought Contingency Plan. The State
adopted this regulation in 1997, requires the adopted plan
to be filed with the Texas Commission on Environmental
Quality and requires a reevaluation every 5 years.
Furthermore, as a condition of our Purchase Agreement
with the City of Fort Worth, we are required to adopt a
Drought Contingency Plan that at a minimum, is as
stringent as theirs.
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Southlake’s Drought Contingency Plan first went into effect
in August of 1996 and was last revised in January of 2006
and mirrors the Drought Contingency Plan of the City of
Fort Worth.
Today, our plan contains triggers based strictly on City of
Fort Worth or Tarrant Regional Water District parameters
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…and, it does not contain triggers reflecting the specific
pumping parameters of the City of Southlake System.
Thus, we occasionally have difficulty in controlling
consumption of water during peak demand periods.
This heavy consumption results from heavy demand from
our customers during the early morning hours.
Consumption is especially high during dry periods and
times of drought.
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As alluded to earlier in my presentation, our ability to
provide water to our customers is potentially limited by one
of two factors:
•Pumping capacity -Providing more pumps will not help
as will are nearing the pressure class of the pipeline and
the elevated storage tank capacity.
•City Staff is currently working on a study of potential
routes for a line which will provide water to the north side
of the city. In addition, the Master Plan calls for a new
Elevated Storage Tank north of the TW King Pump Station.
This should improve the distribution capabilities of the
city’s system.
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dropped below 8 feet.
This graph represents the water level in the city’s 4
elevated storage tanks. The water level in each of the
tanks can range from 0 to 40 feet. The vertical axis
represents this range from 0 to 40 feet. The horizontal
axis represents time from left to right.
Each of the city’s 4 tanks is represented by a separate
colored line.
This graph reflects the elevation of water in all four of the
city’s elevated storage tanks over a 4 day period last
Summer. Please notice on the graph that the elevation of
the water in the low pressure plane tanks dropped each
day, reaching their lowest points a little after 8 a.m. each
day.
The Red Arrow indicates a critical point at which on this
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day the water level in the 3 low pressure plane tanks all
It is essential that we maintain sufficient levels of water in
our elevated storage tanks for a number of reasons,
•First and foremost, in addition to the city providing water
at adequate pressures for domestic use, we must also be
able to provide water in the event of a fire somewhere in
the city.
•Therefore, it is necessary, during periods of high demand
that we have the ability to mandate a reduction in water
consumption by limiting outdoor irrigation and other water
conservation methods.
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As I have mentioned to you during past discussions, it is
important that we have the ability to mandate reduced
consumption should conditions warrant.
Due to high demands during the hot Summer months, our
pumping capacity reaches it limits. This means that during
a peak demand period, our water customers are using
water faster than we can pump the water. When this
occurs for a prolonged period of time, we increase the
probability that we could empty all of the elevated water
storage tanks; thus, resulting in a pressure drop in the
city’s water system.
In accordance with State regulations, should the pressure
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drop below pounds per square inch, we would be
required to issue a “Boil Water Notice”. Therefore, we
need to build into our Drought Contingency Plan, a vehicle
to mandate a reduction in water consumption should the
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demand reach a certain level.
Our current Drought Contingency Plan has 4 stages. The
proposed Drought Contingency Plan has these same 4
stages.
Efforts are being made to align these stages so that they
are consistent with all North Texas Water Authorities so
that as media picks up on these stages and information is
disseminated in the region, people are not confused.
The names of these stages follow the nomenclature used
for weather related events.
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•The first stage calls for voluntary water conservation
measures; and,
•irrigation is recommended, but not required to be limited
to once every 5 days.
•Remember, that last year, we were required to amend the
city’s ordinance calling for no irrigation between 10 a.m.
and 6 p.m. from June 1 to September 30 of each year.
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•addition of the local trigger.Contingency Plan. The only change in Stage No. 2 is the Stage 2 are the same of those under our current Drought Please note that the water conservation
efforts under or the Drought Contingency Stage is escalated.implemented, Stage 2 will remain in effect until October 1 plane elevated water storage tanks. Once Stage 2 is expect that
water levels should rise in the low pressure Once these water conservation measures are in place, we safety and welfare fighting and uses necessary to maintain public health, Finally,
water use from Fire Hydrants is restricted to fire
The 2 nd stage, Water Watch is initiated when the water
level in all 3 lower pressure plane tanks falls below 18 feet
for 3 consecutive days while 3 pumps operating at the
Pearson Pump Station. Pumping with more than 3 pumps
will exceed the pressure rating of the pipe.
Once Stage 2 of the Drought Contingency Plan is
implemented, several mandatory water conservation
measures go into effect:
•Irrigation is limited to once every 5 days;
•No use of water for hosing off of pavement, buildings or
windows;
•Vehicle washing is restricted to commercial facilities only
which have water reuse processes; and,
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otherwise wasting water is strictly prohibitedaddition of a local trigger. addition of a local trigger. difference in the proposed plan from our current plan is the difference in the
proposed plan from our current plan is the efforts remain the same as those in our current plan. The efforts remain the same as those in our current plan. The Again, as in Stage 2,
the mandatory water conservation Again, as in Stage 2, the mandatory water conservation ••otherwise wasting water is strictly prohibited
Once the water conservation measures resulting from the
implementation of Stage 2 are in place and should the
water elevations once again fall to an elevation of 12 feet
in all 3 low pressure plane elevated storage tanks for 3
consecutive days, Stage 3 with 3 pumps pumping will be
imposed.
In Stage 3 of the proposed Drought Contingency Plan, all
water conservation measures of Stage 2 remain in effect
and the following restrictions go into effect.
••Operation of ornamental fountains must be discontinued;Operation of ornamental fountains must be discontinued;
••No draining, filling, refilling or adding water to pools or No draining, filling, refilling or adding water to pools or
jacuzzi type pools will be allowed;jacuzzi type pools will be allowed;
••Foundation watering will be limited to hand held hose and Foundation watering will be limited to hand held hose and
only then on the 5 day watering cycleonly then on the 5 day watering cycle
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••Any action allowing water to run onto pavement or Any action allowing water to run onto pavement or
Finally, Stage 4 is referred to as Emergency Water Use
Management. Stage 4 results from a malfunction or
breakdown of a water system component such as a pump,
storage tank or supply line which severely impacts the
operation of the city’s water system.
This Final Stage has 3 triggers:
••Water level in 3 elevated storage tanks fall below 12’ Water level in 3 elevated storage tanks fall below 12’
for three consecutive days with the Pearson pump for three consecutive days with the Pearson pump
and,orand,or
station operating at 100% capacity;station operating at 100% capacity;
••malfunction or breakdown of a water system malfunction or breakdown of a water system
component (pump, storage tank, or supply line) which component (pump, storage tank, or supply line) which
severely limits the City’s ability to provide water; and, severely limits the City’s ability to provide water; and,
or,or,
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At the discretion of the Director of Public WorksAt the discretion of the Director of Public Works
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In Stage 4, all Stage 2 and 3 water conservation measures
are in effect. In addition, Stage 4 requires:
•NO Landscape Watering;
•As well, as no installation of new landscaping until the
underlying cause of the Stage 4 level is resolved.
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This chart indicates the schedule that the City of Southlake
will utilize in the event a 5 day watering schedule is
implemented. This is the same watering schedule that is
recommended under Stage 1 –Dry Conditions of the
Drought Contingency Plan.
This is the same watering schedule recommended by City
of Fort Worth and Tarrant Regional Water District. In fact,
this proposed watering scheduled is used by most water
authorities in the North Texas Region.
Please note that this is the same schedule that is used
throughout North Texas and remains the same as is our
current plan.
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