0482
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ORDIlWCE 00. 482
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AN ORDINAl'CE OF THE CITY OF SOlJTHL.l\KE, TEXAS ADOPrIK; A S'.roRM DRAIlWiE
fOLICY; RQJIR.JN; PRELIMINARY AND FINAL DRAINAGE b"TUDIES AND cntPUTER
D.RAINJ\GE KDEI:S IN APProPRIATE CIRCUMSTAN::&S AND POOVIDIro A i&"VIE;~'l
P:RCXmS THEREFORE; RFt1OIRIro THE SUBMISSIW OF 10m 'I'lJE:FEFORE;
PROVlDIro DESI~ CRITERIA FOR ON-SITE AND OFF-SITE DRAINAGE 1\ND
CHANNEL IMPBJVaotF.Nl'S AND PmVIDING FOR THE MAIN.l'ElOJCE OF SAME;
PmvIDING FOR E'..ASE)otfNr ACQUISITION; PROVIDnx; FOR ~Jas TO THE
~IRF>fEN'.rS OF THIS ORDINAlCE; Pa.1VIDIR; FOR MHINISTRATICfi AND
ENFOKDIENT AND PRE9:RIBIro PENALTIES FOR THE VIOLATION OF THE
PROVISIQifS OF THIS ORDINm::E; PKWIDIN:i THAT THIS ORDINAN::E SHALL BE
CUMUL\TIVE OF ALL ORDnwcES; PROVlDIN3 A SE.VERABH.ITY CJ:..A.USE;
ProVIDING A SAVIR;S CLAUSE; POOVIDThX7 FOR PUBLIC'.ATICN ill PAMPmET
FORM; ProVIDOO FOR PUBLlCATIOO IN THE OFFICIAL ~PAPER; AND
PROV1DING AN .t;lo"y.t1:1'IVE DATE.
WHERF.J\S, tbe City of Southlake.. Texas is a home rulE~ city acting l.:.nder
its charter adopt.ed by the electorate pursuant t.o Article XI, SeC'~~ion 5 of
the 'rexas Constitution and Chapter 9 of the Local Goverrnrent Code; and
WHEREAS, the City Council of the City of Southlake has determined that
c:: adequate drainage regulations are necessary to protect the citizens of
Southlake and the public in general from storm water hazards resulting from
the development of properties within the City of Southlake; and
WHEREAS, the City Council of the City of Southlake finds that these
drainage regulations in this ordinance are the minimum requirements
necessary to protect the public health, safety and welfare.
Nai, THEREFORE, BE IT 0RDAlNFD BY THE CITY ax:H:IL OF THE CITY Of'
SOUTHr.J\ICE, 'rEX1\S:
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SECrICfi 1
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This ordinance shall be cumulative of all provision of ordinances of
the City of South lake , Texas, except where the provisions of this ordinance
are in direct conflict with the provisions of such ordinances, in which
event the conflicting provisions of such ordinances are hereby repealed.
SECrlOO 2
It is hereby declared to be the intention of the City Council that the
phrases, clauses, sentences, paragraphs and sections of this ordinance are
severable, and if any phrase, clause, sentence, paragraph or section of
this ordinance shall be declared unconstitutional by the valid jUdgment or
decree of any court of coopetent jurisdiction, such unconstitutionality
shall not affect any of the remaining phrases, clauses, sentences,
paragraphs and sections of this ordinance, since the sarre would have been
enacted by the City Council without the incorporation in this ordinance of
C any such unconstitutional phrase, clause, sentence, paragraph or section.
SECrlOO 3
Any person, firm or corporation who violates, diSObeys, omits,
neglects or refuses to conply with or who resists the enforcement of any of
the provisions of this ordinance shall be fined not rrore than Five Hundred
Dollars ($500.00) for each offense. Each day that a violation is permitted
to exist shall constitute a separate offense.
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SEX:'l'IOO 4
All rights and remedies of the City of Southlake are expressly saved
as to any and all violations of the provisions of any ordinances affecting
storm drainage which have accrued at the time of the effective date of this
ordinance; and, as to such accrued violations and all pending litigation,
both civil and criminal, whether pending in court or not, under such
ordinances, same shall not be affected by this ordinance but may be
prosecuted until final disposition by the courts.
SEX:'l'IOO 5
The City Secretary of the City of Southlake is hereby authorized to
publish this ordinance in book or pamphlet form for general distribution
a.rrong the public, and the operative provisions of this ordinance as so
published shall be admissible in evidence in all courts without further
proof than the production thereof.
SEX:'l'IOO 6
The Ci ty Secretary of the Ci ty of Southlake is hereby directed to
publish the proposed ordinance or its caption and penalty together with a
notice setting out the time and place for a public hearing thereon at least
ten (10) days before the second reading of this ordinance, and if this
ordinance provides for the irrposition of any penalty, fine or forfeiture
for any violation of any of its provisions, then the City Secretary shall
additionally publish this ordinance in the official City newspaper one time
wi thin ten days after passage of this ordinance, as required by Section
3.13 of the Charter of the City of Southlake.
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SECTION 1-
C This ordinance shall be in full force and effect from and
after its passage and publication as required by law, and it is ~v
ordained.
PASSED AND APPROVED ON FIRST READING ON THIS ~ DAY OF
$Lu1~
, 1989.
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CITY SECRETARY
PASSED AND APPROVED ON SECOND READING ON THIS 17
IUlt11t../,~ , 1989.
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"I E
DAY OF
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A'l.'TE}.T:
.:,e- /JL-f{1'L.;} iiPt.$-?uv
CITY SECRETARY
APPROVED AS TO FORM AND LEGALITY:
u/e [)~
City Attorney'
Date: ;3 - /3 - r()
ADOPTED: 1 p- 11 --1 [)
EFFECTIVE: /,~ - J-J -1 0
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Article 1
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Table of Contents
STORM DRAINAGE POLICY
GENERAL PROVISIONS
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. . . . . . . . . . . . .1-1
. . . . . . . . . . . . .1-1
1.01
1.02
Article 2
Purpose......
Definitions.
DRAINAGE STUDIES
2.01
2.02
2.03
2.04
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Article 3
Ge n era 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Preliminary Drainage Study..................
A. When Required.....................
B. Qualification to Prepare Study.......
C. Requirements........ ........
D. Exemptions. . . . . . . . . . . . . . . . . .
Final Drainage Study..... ....... ....
A. When Required........................
B. Qualification to Prepare Study.......
C. Requirements....... ...... .....
D. Calculations Chart. ......
E. Exemptions. . . . . . . . . . . . . . . . . . .
Computer Models.....
A. General.........
B. HEC I Analysis.....
C. HEC II Analysis....
Page
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3.01
DRAINAGE DESIGN CRITERIA
3.02
3.03
3.04
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Drainage Manual Reference.................
A. Fort Worth Drainage Manual............
B. Highway Department Hydraulic Manual.
C. Retention / Detention........
Design Storm Frequency...........
A. R.O.W. / Easement Capacity..
B. Street Capacity......
1. Arterial Streets..
2. Collector Streets.
C. Storm Sewer Capacity.
D. Open Channels........
E. Culverts and Bridges.
Time of Concentration..... .....
A. Average Conditions..............
B. Unusual Circumstances.........
Land Use Runoff Coefficients......
A. Fully Developed Criteria......
B. Land Uses.....................
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.3-1
.3-1
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. . . . . . . . . . . .3-2
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C.
1. Existing Zoning Categories......
2. Land Use Map Designation..
Overdeveloped Tracts............
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Article 4
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Miscellaneous Design Criteria..
A. Pipe Design Criteria...................
1. Minimum Pipe Size.....
2. Minimum Velocity..........
3. Changes in Pipe Size.......
4. Vertical and Horizontal Curves.
Manhole Requirements.
Street Crowns.....
B.
C.
D.
Culverts.............
End Sections.......
Private Property.
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1.
2.
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E.
F.
Lakes. . . . . . . . . . . . . . . . .
Easements..............
Outfall Extension.
Open Channel Easements...
Maintenance Access.......
Detention / Retention Ponds.
1.
2.
3.
4.
OPEN CHANNEL POLICY
4.01
General.............
4.02
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4.03
4.04
Article 5
Channel Types.............
Building Line Limitations.
C. Easement Widths......
Natural Channels..........
A. With No Improvements.
B. With Modifications...
1. Erosion Control.
Earth Channels..
A.
B.
C.
A.
B.
General........
Soil Tests.....
Channel Shape.
pilot Channel..
E. Slope Treatment.
Concrete Lined Channels.
A. Channel Shape........
B. Curves or Deflections.
. . . . .
D.
5.01
ON-SITE IMPROVEMENTS
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Owner's Responsibility..
A. Upstream Drainage..
B. Installation Costs....
C. Construction Plans.
D. Maintenance Bonds..
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Article 6
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OFF-SITE DOWNSTREAM IMPROVEMENTS
General. . . . . . . . . . . . . . . . . . . . . . . . .
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6.01
6.02
6.03
6.04
6.05
6.06
6.07
Article 7
7.01
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7.02
7.03
Article 8
Limits of Off-Site Study.....
A. Conceptual Drainage Plan...
B. Limits of Study............
Responsibility for Off-Site Study
A. First Development............ ..........6-1
B. Credit for Cost of Study......................6-1
Requirements of Off-Site Study.. ..............6-1
A. Complete Watershed.
B. Accuracy Level............. ... ......6-1
C. Cost Determination............ ...........6-2
Off-Site Easement Acquisition.....................6-2
Cost Participation for Off-Site Improvements......6-2
A. Adjacent Downstream Structures.... ..........6-2
B. Other Downstream Improvements.................6-3
Construction of Off-Site Improvements......... .6-3
A. Remaining Capacity in Critical Structure. .6-3
B. No Capacity Remaining......... .. ......6-3
1. Prior Contributions....... ..6-3
2. Future Refunding.... ... ......6-3
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DRAINAGE STUDY REVIEW PROCESS
Submi ttal. . . . . . . . . . . . . . . . . . . . .
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Coordination of Processing.
A.
B. Fees. . . . . . . . . . . . . . . . . . . . .
C. Reproductions..............
Responsibility for Review......
A. Director of Public Works.
B. City Engineer... .......
c. Approval. . . . . . . . . . . . . . . . . . . . . .
D. Appea 1 s. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Impact on Subdivision Approval.
A. Downstream Hazards.........
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8.01
RETENTION AND DETENTION POLICY
8.02
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General.................
A. Intent..............
B.
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Scale of Review.....
1. Development Scale...
2. Site-specific Scale.
Development Scale Projects.
A. Review Process.. .....
B. When Required... ....
C. Solutions.......
1. Check Dams...
2. Detention Ponds..
3. Retention Ponds......
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8.03
Article 9
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Site-Specific Scale...
A. Review Process...
B. When Required.....
1. Overdeveloped Runoff..
2. Change in Use.......
C. Solutions...............
parking
Rooftop
On-Site
1.
2.
3.
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Lot Storage.
Storage.............
Detention Ponds.........
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MISCELLANEOUS PROVISIONS
9.01
9.02
9.03
9.04
9.05
9.06
9.07
9.08
B. Drainage Easements with no Structures..
C. Drainage Easements with Surface Structures.
D. Bar Ditches and Culverts.
Enforcement.................
A. Development Permit.
B. Building Permit.....
C. Final Plat Filing...
Modifications and Variations.
A. Compliance............
B. Discretion of Council.
Violations.". . . . . . . . . . . . . .
A. Fines. . . . . . . . . . . . . . . . .
B. Injunctions...........
Severability of Provisions.
Conflicting Ordinances..
Liability Disclaimer........
A. General................
B. Professional Liability..
Contingent Warning........
Maintenance Issues........
A. General...............
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ARTICLE 1
GENERAL PROVISIONS
Section 1.01
Purpose
The purpose of this ordinance is to provide for the orderly, safe
and healthful development of the area both within the City and within
it's extraterritorial jurisdiction and to promote the health, safety
and general welfare of the community, and to minimize public and
private losses due to flood conditions. In order to carry out the
purpose hereinabove stated, it is hereby declared to be the policy of
the City to guide and regulate the implementation of all drainage
improvements both within the City and within it's extraterritorial
jurisdiction. This ordinance shall be administered using the following
guidelines:
A.
Due consideration shall be
Thoroughfare Plan, Land-Use
recommended)y the City.
given to the City's Master Plan,
Plan and other developmental guides
B.
Consideration shall
property and the
future.
currently developed
of property in the
be given
anticipated
to both the
development
C.
Protection of the soils, topography, wildlife, vegetation and
other amenities of the City shall be considered an objective of
this ordinance.
D.
Determination of cost participation in
attempt to be reasonable and consistent
all developments or assessment programs.
any improvements shall
in their application to
Section 1.02 Definitions
A. General Rules: For the purpose of this ordinance, the following
rules shall be applied in constructing, interpreting, or otherwise
defining the terms and provisions hereof:
1.
Words used
words used
number and
singular.
in the present tense shall include the future,
in the singular number shall include the plural
words used in the plural shall include the
2. The word "shall" is mandatory and the word "may" is per-
missive.
3. The phrase "used for" shall include the phrases, "arranged
for", "designed for", "intended for", and "occupied for", and
shall apply exclusively to physical uses.
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B.
Definitions: For the purpose of this ordinance, certain words or
terms applicable hereto are defined as hereinafter provided.
Words and terms used in this ordinance, but not defined in this
ordinance shall have the meanings ascribed thereto in the Zoning
Ordinance, The Subdivision Ordinance, or other applicable ordi-
nances of the City.
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Benchmark: An elevation reference mark.
"CAR Factor: A multiplicative coefficient achieved by multiplying the
coefficient of runoff "C", by the area in acres "A" that is tribu-
tary to the point of design.
"cfs": Cubic feet per second. A measure of the volume of water.
Critical Structures: All drainage improvements outlined
Conceptual Drainage plan (prepared by the City) which are
by a large watershed, and are intended for participatory
allocations as determined by the City.
in the
impacted
cost
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Detention: The detention of stormwater on a site or within a project
shall be interpreted as a temporary restrainment of runoff with
anticipation of normal runoff over an extended period of time.
Development: Any man-made change to improved or unimproved real
estate, including but not limited to, buildings or other struc-
tures, mining, dredging, filling, grading, paving, excavation or
drilling operations.
Development Permit: A permit required before development shall begin
in an area designated as within the limits of the base flood.
Drainage Easement: A delineated portion of land
overland or underground transfer of storm
shall not have any permanent structures,
obstacles hindering the safe transfer of
easement.
set aside for the
water. This area
fences, or other
water through the
Drainage Improvements: All elements of a storm drainage system
consisting of streets, alleys, storm sewers, channels, culverts,
bridges, swales, and any other facility through which or over
which storm water flows.
Escrow: Money placed in the possession of the City to accomplish the
purpose set out in this ordinance, including but not limited to
the following: purchase of right-of-way, design and construction
of drainage improvements, curb, gutter, and pavement.
FEMA: Abbreviation for "Federal Emergency Management Agency"
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"FIRM Map": A map produced by the u.s. Department of Housing and Urban
Development, which has the purpose of a Flood Insurance Rate Map.
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The Federal Emergency Management Agency has de1~neated both the
areas of special flood hazards and the risk premium zones applic-
able to the community.
Flood: A general and temporary condition of partial or complete
inundation of normally dry land areas from the overflow of inland
or tidal waters, the unusual and rapid accumulation of runoff or
surface waters from any source, or mudslides which are caused or
precipitated by accumulations of water on or under the ground.
Flood, "100 year": A flood that, on the average, is likely to occur
once every 100 years, <i.e., that has a one-percent chance of
occurring each year). Also referred to as "100 year storm" and as
the "Base Flood".
Flood plain: The area of land inundated with water over a specified
design storm frequency, typically a 100 year storm.
F100dway: The channel of a river or other watercourse and the adjacent
land areas that must be reserved in order to discharge the base
flood without cumulatively increasing the water surface elevation
more than one foot.
F100dway Map: A map produced by FEMA which delineates the flood
I~ boundary and f10odway.
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Fort Worth Drainage Manual: The City of Fort Worth Storm Drainage
Criteria and Design Manual.
Freeboard: A factor of safety usually expressed in feet above a flood
level for purposes of flood plain management.
Frequency: The average frequency statistically determined for which it
is expected that a specific flood level or discharge may be
equalled or exceeded.
HEC I Analysis: A computer watershed model developed by the Hydraulic
Engineering Center, u.s. Corps of Engineers, which contains
several methods with which to simulate surface runoff and river-
reservoir flow in river basins and flows in urban areas.
HEC II Analysis: A computer backwater flood model developed by the
Hydraulic Engineering Center which calculates water surface
profiles for steady, gradually varied flows in natural or man-made
channels.
Maintenance: Periodic removal of underbrush, occasional rough mowing,
and no dumping of trash, soil, or other debris. This shall
include general upkeep of the area to prohibit any activity which
may impede the overland flow of storm water.
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Mean Sea Level: The National Geodetic vertical Datum (NGVD) of 1929 or
other datum, to which base flood elevations shown on a community's
Flood Insurance Rate Map are referenced.
Mudslide: A general and temporary movement down a slope of a mass of
rock or soil, artificial fill, or a combination of these materials
caused or precipitated by the accumulation of water on or under
the ground.
Retention: The retention of stormwater on a site or within a project
shall be interpreted as a permanent restrainment of runoff with
no anticipation of runoff over an extended period of time.
Ultimate Conditions: The level of development anticipated upon
full development of all land with a watershed. Typically
determined by reference to existing use, existing zoning or
projected land use from the City Land Use Plan, whichever is more
intense. Unless specifically stated otherwise, all storm run-off
calculations required within this ordinance should be based on
ultimate conditions of development.
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ARTICLE 2
~ DRAINAGE STUDIES
Section 2.01 General
A. The City has endeavored to associate the complexity of the
drainage study with the finality of the proposed development.
Developments that are in a "preliminary" or "feasibility" phase
will require drainage studies that are less demanding in
calculated precision than those that are in a "final" state
of proposal. It is a policy of the City to require a drainage
study on all property to be developed in the City.
Section 2.02 preliminary Drainage Study
When Required: It is a policy of the City to discuss and concep-
tually resolve drainage issues of a development at the Preliminary
Plat stage. The applicant shall submit a Preliminary Drainage
Study with the submittal of any preliminary Plat of a proposed
development. A preliminary Drainage Study may also be required by
the City when reviewing the merits of a change in zoning,
especially when the use is more intense than that shown on the
Land Use Plan. This Preliminary Drainage Study would accompany
the Concept Plan as required by ordinance. Preliminary Drainage
Studies shall meet all the requirements of this ordinance.
Approval of the Preliminary Plat or Concept Plan may be contingent
on the acceptability of the solutions proposed by the Preliminary
Drainage Study.
B. Qualification to Prepare Study: The Preliminary Drainage Study
shall be prepared by a Professional Engineer Registered in the
State of Texas and experienced in Civil Engineering and having a
thorough knowledge of the study of drainage issues. The Prelimi-
nary Drainage Study shall be signed and sealed, and dated by the
person preparing the study.
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C.
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Requirements: The Preliminary Drainage
the following information:
Study shall contain
1.
Shall be drawn
Preliminary Plat
of 1"=100'.
over a mylar or reproducible copy of the
or Concept Plan, preferably at a scale
2. The name, address and phone of the person responsible
for preparing the drainage study.
3. The seal and signature of the person preparing the study.
4.
Existing contours in conformance with the following criteria:
-Slope less than 2% : 2' vertical intervals
-Slope 2% - 15% 5' vertical intervals
-Slope greater than 15% 10' vertical intervals
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5. Benchmark elevation labeled and location shown.
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6.
All existing and proposed drainage structures on-site
and/or immediately adjacent to the property should be
labeled, i.e. dams, spillways, flumes, channels, culverts,
and noted as to type and size, i.e. earth, concrete, riprap,
metal, RCP, VCP, etc.
7. Flow lines of all drainage and water courses, i.e. streams,
creeks, swales, etc.
8. Delineation of on and contiguous off-site drainage areas
including the acreages thereof. This should include a
contour map of the entire drainage area contributing runoff
to the subdivision. (Scale not smaller than 1"=2000')
9. Sufficient design calculations showing preliminary sizes of
all easements.
10. Labeling of all easement sizes and locations on site.
D.
Exemptions:
ment of the
requirements
the study.
The Director of Public Works may waive the require-
Preliminary Drainage Study or may limit certain
in situations which obviously would not benefit from
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~ Section 2.03 Final Drainage Study
A. When Required: It is a policy of the City to resolve drainage
issues of a development at the Final Plat stage. The applicant
shall submit a Final Drainage Study with the submittal of any
Final Plat, Plat Revision, or Plat Showing of a proposed develop-
ment. Final Drainage Studies shall meet all the requirements of
this ordinance. Approval of the above mentioned plats may be
contingent on the acceptability of the solutions proposed by the
Final Drainage Study.
B.
Qualification to Prepare Study: The Final Drainage Study
prepared by a Professional Engineer Registered in the
Texas, experienced in Civil Engineering and having a
knowledge of the study of drainage issues. The Final
Study shall be signed, sealed, and dated by the person
the study.
shall be
State of
thorough
Drainage
preparing
C. Requirements: The Final Drainage Study shall contain the fol-.
lowing information:
1. Shall be drawn over a mylar or reproducible copy of the
Final Plat, preferably at a scale of 1"=100'.
2.
The name, address and phone of the person responsible
for preparing the drainage study.
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3. The seal and signature of the Engineer preparing the study.
4.
Existing contours in conformance with the following
critieria:
-Slope
-Slope
-Slope
less than 2%
2% - 15%
greater than 15% :
.
.
2' vertical intervals
5' vertical intervals
10' vertical intervals
.
.
5. Benchmark elevation labeled and location shown.
6. All existing and proposed drainage structures on-site
and/or immediately adjacent to the property should be
labeled, i.e. dams, spillways, channels, flumes, culverts,
and noted as to type and size, i.e. earth, concrete, riprap,
metal, RCP, VCP, etc. Flow line elevations shall be provided
for all structures.
7. Flow lines of all drainage and water courses, i.e. streams,
creeks, swales, etc.
8. Delineation of on and contiguous off-site drainage areas
including the acreages thereof. This should include a
contour"map of the entire drainage area contributing runoff
to the subdivision. (Scale not smaller than 1"=2000')
9.
Sufficient design
all easements.
calculations showing
final sizes of
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10.
Labeling of
shall tie the
corners.
all easement
easements to
sizes and locations. Dimensions
any adjacent property or lot
D. Calculations Chart: The design calculations required shall
at a minimum include the following calculations in a format
similar to the following chart:
DRAINAGE COMPUTATIONS " .
&.I8-AAEA AREA C CA "n: .. o. ,.. 0- ,- ft':"" ~af~
. Ac. -. mln. In/IIc efs ~ eft In/h: ell POINT
^ 3.8 .7 '.66 15 4.9 l'\n 0 ,~ 0;. .,., ")n iii: I.
S ~.6 .7 3.92 15 4.9 19.2 6.2 24.3 7.}. 30.1... -
. . .
. . .
- .
DUr aJl'VIlITmlS
. a..orr .
1lIn1:ll ..... _u. N"" Ie"" IerlllI' w....n ....CIIC1II cuaarr n.w "Icat
. or ....fI. IM,::- "o. .. .. IOU' .,
..... 8\..'1 ..... "" . "...., ......... _II 10071'
.: II ....,. n.. ...-. "UIQlo ..,- .U'I ...11
- .. .. 7. . r eA a..... e . ~.m -
rvn "'" .. CI.I. n n. n. c.'~n. n. ~Ia. ....... '.
. . T . . . .0 . II " U
. I , .
. " . . . . .--.
..
. . . . .
It-! . . 20.. .44- .>> . L71 L>> 10 . 2S.J 0 100. 10' .....
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E.
Exemptions: The Director of Public Works may waive the require-
ment of the Final Drainage Study or may limit certain requirements
in situations which obviously would not benefit from the study.
Section 2.04 Computer Models
A. General: The Director of Public Works, upon a recommendation from
the City Engineer, may request that a drainage computer model be
submitted with the Final Drainage Study. These shall be submitted
with the Final Plat, Plat Revision, or Plat Showing. Where a
computer model is requested along with the Final Drainage Study,
approval of both the Final Drainage Study and the Computer Model
shall be a prerequisite to plat approval.
B. BEC I Analysis:
1. When Required: Any property which has 1,000 acres draining
into the tract at its lowest point shall be required to
submit a BEC I Analysis.
C. BEC II Analysis:
1.
When Required: Any property adjacent to
impacted by the Floodway as designated
required to provide a BEC II analysis.
or potentially
by FEMA may be
a.
Natural. Channels:
BEC II Analysis.
may require a
Natural channels
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ARTICLE 3
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DRAINAGE DESIGN CRITERIA
Section 3.01
Drainage Manual Reference
A. Fort Worth Drainage Manual: The City hereby adopts the most
current City of Fort Worth Storm Drainage Criteria and Design
Manual as the reference for all calculations required by this
ordinance. The City shall not maintain copies of the Fort Worth
Drainage Manual for the use of developer's Civil Engineers. It is
the City's intention by this adoption to help standardize the
approach to storm drainage design and use a Drainage Manual which
is familiar and accessible to most Engineers practicing in this
region.
B. Highway Department Hydraulic Manual: In cases not covered
by the Fort Worth Drainage Manual, the Hydraulic Manual prepared
and compiled by the Texas Highway Department's Bridge Division,
dated March, 1962, with subsequent revisions, may be used.
C. Retention and Detention: Retention and detention design criteria
shall be determined on a case-by-case analysis using standard
civil engineering practices.
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Section 3.02 Design Storm Frequency
A. R.O.W. / Easement Capacity: Streets and storm drainage systems
shall be designed using a design storm of lOa-year frequency. The
capacity of the street R.O.W. and/or drainage easements and the
storm sewer pipe working in combination must be designed for a
capacity to safely contain storm runoff resulting from the 100
year storm.
B. Street Capacity: Whenever the capacity of a street to the
top of any curb is exceeded by storm runoff from a 5-year fre-
quency storm, a storm sewer shall be designed and constructed.
1. Arterial Streets: The storm sewer system shall be designed
so as to prevent ponding on one 12' lane in each direction.
There shall be no cross-flow drainage at intersections with
Arterial Streets.
2. Collector Streets: The storm sewer system shall be designed
so as to prevent ponding on at least one 12' lane. There
shall be no cross-flow drainage with greater than 20 cfs at
intersections with Collector Streets.
C. Storm Sewer Capacity: Storm Sewers are to be designed for a
storm frequency of 5 years.
1.
In a case where this 5~year design frequency for storm
sewer in combination with surface flow capacity of the
available R.O.W. and easements does not contain the lOa-year
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storm, then the storm sewer shall be increased in size and
designed for a capacity of a higher frequency, of up to 25
years.
2.
At such point where
the 25-year storm sewer
R.O.W. and easements,
shall be used.
the
in
then
runoff exceeds the capacity of
combination with the available
one of the following approaches
a. The storm sewer shall be designed to carry the runoff
from a 100-year storm.
b. The storm drainage improvements shall be designed as an
open channel.
3. Over private property: Any drainage intended to cross
private property shall be contained in a closed system
designed to handle the 100 year storm. Adequate easements
shall be dedicated for this facility.
D. Open Channels: All open channels are to be designed to handle the
runoff from a 100-year storm and said channels shall have a
minimum of one foot freeboard to the top of bank.
E.
Culverts and Bridges: Culverts and bridges shall be designed to
handle the runoff from a 100-year storm. Given that both culverts
and bridges may .solve a particular situation, it shall be up to
the Director of Public Works to determine which type of structure
shall be used. Bridges shall require two (2) foot freeboard
between the low point of the bridge and the 100 year water surface
elevation. For any culverts, the headwater (hydraulic gradient)
shall be a minimum of one (1) foot below the adjacent top of curb.
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Section 3.03 Time of Concentration
A. Average Conditions: Under average conditions the time of concen-
tration to the upstream end of a drainage system shall coincide
with Table 11-2, "Minimum Inlet Time of Concentration", page 11-5
of the Fort Worth Drainage Manual.
B. Unusual Circumstances: Under circumstances which produce times of
concentration in excess of those shown in Table 11-2, the time of
concentration shall be determined through the use of Figure II-I,
"Nomograph for Time of Concentration", page 11-6 of the Fort Worth
Drainage Manual. The following cautions should be exercised when
using this Nomograph:
1.
The path along which the time of concentration is determined
should be representative of the drainage area as a whole. On
some irregularly shaped drainage areas it is possible to find
the time of concentration along a particular path which is
representative of only a small portion of the drainage area.
This time of concentration may greatly exceed the time of
concentration which is more representative of the drainage
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area as a whole.
2.
Overland flow shall be considered channelized at such
time as the distance traveled exceeds 200 feet.
Section 3.04 Land Use Runoff Coefficients
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A.
Fully
based
uses.
Developed
on land
Criteria:
uses as if
All runoff coefficients shall be
fully developed with those types of
B.
Land Uses: All runoff coefficients shall be in accordance
with the existing zoning or the current Land Use Map approved by
the City, whichever coefficient is more intense. The following
runoff coefficients shall be used under the respective land use
determination as shown.
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Existing Zoning Categories nCn Factor
AG Agricultural ...............Use Land Use Factors
RE Residential Estate................. .35
SFl Single Family Residential.......... .50
SF-lA Single Family Residential.......... .50
SF-lB Single Family Rpsidential.......... .50
SF-30 Single Family Residential.......... .50
SF-20A Singl~ Family Residential.......... .50
SF-20B Single Family Residential.......... .50
MF-I Multi-Family Residential........... .75
MF-2 Multi-Family Residential........... .75
PUD Planned Unit Development.....Project Specific
CS Community Service.................. .80
0-1 Office 1........................... .80
0-2 Office 2........................... .80
C-I Neighborhood Commercial............ .80
C-2 Local Retail Commercial............ .80
C-3 General Commercial................. .80
C-4 Arterial Mall Commercial........... .90
B-1 Business Service Park.............. .80
B-2 Commercial Manufacturing........... .80
I-I Light Industrial................... .70
1-2 Heavy Industrial................... .80
He Hotel.............................. .90
MH Manufactured Housing............... .50
SP-l Detailed Site Plan.............Depends on Use
SP-2 Generalized Site Plan..........Depends on Uses
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Land Use Map Designation nCn
Public/Semi-Public.........................
Flood Plain................................
Industrial.................................
Low Density Residential....................
Medium Density Residential.................
Mixed Development..........................
~actor
.75
.35
.70
.50
.50
.75
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Overdeveloped Tracts: When it is determined by the Site Plan
review process or other City review, that the actual development
of a particular property will create a runoff factor greater than
that shown for the tract as determined above, retention or
detention may be required on the tract prior to the issuance of a
certificate of occupancy.
Section 3.05 Miscellaneous Design Criteria
A. Pipe Design Criteria:
1. Minimum Pipe Size: The minimum storm drain pipe diameter
shall be fifteen (15) inches.
2. Minimum Velocity: The minimum velocity with the pipe
flowing full shall be three (3) feet per second.
3. Changes in Pipe Size: Pipe crowns at changes in pipe
size should be set at the same elevation.
4. Vertical and Horizontal Curves: Vertical curves in the
conduit shall not be permitted. Horizontal curves shall be
permitted only when the alignment meets the pipe
manufacturer's criteria for curves.
B.
Manhole Requirements: Manholes shall be located at intervals not
to exceed 600 'feet for pipe 24 inches in diameter or smaller.
Manholes shall preferably be located at street intersections,
sewer junctions, changes of grade and changes of alignment.
Manholes for sewers greater than 24 inches in diameter shall be
located at points where design indicates entrance into the sewer
is desireable~ however, in no case should the distance between
openings or entrances be greater than 1,200 feet.
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C. Street Crowns: Street crowns shall be reduced for approximately
one hundred (100) feet on each side of valleys.
D. Culverts: All culverts shall require approval by the City
Engineer prior to the issuance of a culvert permit. All pipe
within public R.O.W. shall be reinforced concrete pipe (RCP) and
shall be jointed together properly (Ram-Nek, Talco or equal).
Reinforced concrete box culverts shall also be allowed. All
culverts shall be inspected during installation by the public
works department. In the event that a particular situation calls
for an "arch-pipe" structure, said structure shall only be made of
an aluminized metal.
1.
End Sections: All culverts of twenty-one (21) inches
in size or larger shall have 6:1 safety end sections.
The ground around the upstream end section shall be graded to
match the 6:1 slope, the ground around the downstream end
section shall be graded to a 4:1 slope. Culverts less than
twenty-one (21) inches in size shall have Type B end sections
as shown in the Texas Highway Department Drawing CH-ll.
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Private Property: Culverts entirely within private property
may use corrugated pipe of a shape and size approved by the
City Engineer.
E. Lakes: Approval to develop in any area subject to inundation by a
lake must be obtained from the appropriate agency responsible for
that particular lake before the city grants its approval.
Agencies that should be contacted include U.S. Army Corps of
Engineers, Tarrant County Water Control Board, Texas Water
Commission and the Trinity River Authority.
2.
Regardless of approvals obtained from those agencies listed above,
no filling, development or construction in any area subject
to inundation by a lake shall occur without the approval of
the city manager, and the city manager may require any studies
necessary to determine that filling, development or construction
does not have any detrimental effect on adjaceant, upstream or
downstream properties and any building shall be protected.
F. Easements: Drainage easements having a mlnlmum width of 15
feet shall be dedicated on the plat or by separate instrument
prior to any construction of the drainage improvements. Minimum
easement requirements for storm sewer pipe shall be as follows:
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Pipe Size
36" and under
42" through 54"
60" through 66"
72" through 102"
over 102"
Minimum Easement
Width Required
15 feet
20 feet
25 feet
30 feet
3.5 times diameter
This width may increase when considering the soil types, pipe
depths, overflow impact, other utilities or similar influences.
1. Outfall extension: Drainage easements will generally
extend at least twenty-five (25) feet past an outfall
headwall to provide an area for maintenance operations.
Drainage easements along a required outfall channel or ditch
shall be prbvided until the flowline "daylights" on natural
grade. The minimum grade allowed on an outfall channel or
ditch will be 0.5 foot per 100 feet.
2.
Open Channel Easements: Channel improvements
easements of sufficient width to contain
100 year storm plus one foot of fre~board.
shall be in
the ultimate
3.
Maintenance Access: Additional easements may be required to
provide access to the drainage easements. This may include
not only access to the drainage easement but additional width
along the easement where necessary. Access to channel
easements will typically be at the intersection with a City
street R.O.W..
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Detention/Retention Ponds: Easements for detention ponds
shall be negotiated between the City and the property owner
upon review of adequate drainage information.
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ARTICLE 4
c: OPEN CHANNEL POLICY
Section 4.01 General
A.
Channel Types: The type of
the basis of the nCAn factor
applicant's engineer.
channel shall be determined on
and other data presented by the
B. Building Line Limitations: All open channels shall contain
the 100 .year storm and one foot freeboard outside of any adjacent
building lines.
C. Easement Widths: All open channels to be maintained by the
City shall be in easements of sufficient width to contain the
channel. An additional 10' width on one side providing a rela-
tively flat, grassed area to be used for maintenance purposes may
be required.
A.
Section 4.02 Natural Channels
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B.
With No Improvements: Natural creek channels may be approved
without channel improvements provided that serious'erosion is not
expected (i.e. velocities less than 6 fps unless an approved soils
test indicates that a higher velocity would be acceptedlJ that
sufficient easements are dedicated to provide protection of
adjacent properties or faci1itiesJ that f100dway easements are
determined in accordance with this ordinanceJ and where arrange-
ments have been made for perpetual maintenance by the adjacent
property owners and/or has been dedicated and accepted for City
Park purposesJ and where in the judgement of the Public Works
Director, the appropriate use of the neighboring property or the
health and safety of such persons affected will not be substan-
tially injured.
With Modifications:
and filling, or to
ties, in accordance
Director.
Such creeks may be modified by cutting
provide for erosion and flood control faci1i-
with plans approved by the Public Works
1. Erosion Control: All erodible areas shall be protected
by laying the slopes back to a maximum slope of 3 feet
horizontally to 1 foot vertically with grass sod coverJ
or protected by concrete, rock, masonry, or retaining
walls to an elevation at least one foot above mean water
elevation.
Section 4.03 Earth Channels
A.
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General: Earth channels may be approved provided that the
velocity of flow will not produce serious erosion (less than
6 fps unless an approved soils test indicates that a higher
velocity would be acceptedlJ that sufficient easements are
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B.
C.
D.
E.
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dedicated to provide protection of adjacent properties or
facilities~ that floodway easements are determined in accordance
with this ordinance~ and where arrangements have been made for
perpetual maintenance by the adjacent property owners and/or has
been dedicated and accepted by the City~ and where in the
judgement of the Public Works Director, the appropriate use of the
neighboring property or the health and safety of such persons
affected will not be substantially injured.
Soil Tests: Soils tests and borings may be required to determine
the probability of erosion. Table VlI-l in the Fort Worth
Drainage Manual shall be used as a guide for determining the
highest velocity of flow for the particular condition which will
not produce serious erosion.
Channel Shape: Earth channels shall have a trapezoidal shape with
a minimum bottom width sufficient to carry the run-off within the
easements while maintaining side slopes no steeper than 3 feet
horizontal to 1 foot vertical (4 to 1 preferred).
pilot Channel: A reinforced concrete pilot channel as determined
by the Public Works Director may be required. The pilot channel
shall be not less than twelve (12) feet in width and having at
least six (6) inch curbs and a four (4) inch depressed invert.
Slope Treatment: The side slopes shall be smooth, free of
rocks, and contain a minimum of 6 inches of topsoil. The slope
shall be block sodded for a distance of 2 feet adjacent to the
pilot channel. Gobi blocks, fiber-mats, or other such similar
materials, may be used in lieu of block sOdding. The balance of
the slope shall be seeded.
Section 4.04 Concrete Lined Channels
A. Channel Shape: Channels shall be trapezoidal in shape and
lined with reinforced concrete in accordance with City standard
specifications. Side slopes shall be a maximum of 1 foot hori-
zontal to 1 foot vertical (prefer 2:1) or as approved by the
Public Works Director. The lining shall typically extend such
that the 100 year storm plus one foot freeboard is within the
concrete lining but alternatives may be considered when presented
with adequate data by the applicants engineer. Channels shall
have a minimum bottom width of eight (8) feet.
B. Curves or deflections: The design of the channel lining shall
take into account the superelevation of the water surface around
curves and other changes in direction.
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ARTICLE 5
c: ON-SITE IMPROVEMENTS
Section 5.01 Owner's Responsibility
A. Upstream Drainage: The owner or developer shall be respon-
sible for designing on-site improvements sufficient to handle all
storm drainage flowing on such person's property. This responsi-
bility includes the drainage directed to that property by prior
development as well as drainage naturally flowing through the
property by reason,of topography.
B. Installation Costs: The owner of a tract of land shall be
responsible for cost of installation of all drainage improvements
within the boundary of their development. This shall include any
oversizing of structures to accommodate upstream runoff.
C. Construction Plans: Construction plans for the development
shall include plans for all drainage improvements. These plans
shall be reviewed by the City Engineer and approval granted by the
Director of Public Works prior to beginning construction.
D. Maintenance Bonds: The owner or developer shall provide mainte-
nance bonds for all drainage improvements. These shall be 20% of
the cost of the improvements and for a two-year duration.
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ARTICLE 6
'C: OFF-SITE DOWNSTREAM IMPROVEMENTS
Section 6.01 General
A. General: With the requirements of this Article, the City intends
to allocate the burden of critical off-site improvements between
all the land owners who impact critical structures. The drainage
studies required for each development shall be responsible for
considering their impact on all downstream structures, and cost
participation shall be determined as outlined in this Article.
Section 6.02 Limits of Off-Site Study
A. Conceptual Drainage Plan: The Conceptual Drainage Plan adopted by
the City delineates the major watersheds throughout the City and
highlights critical drainage structures within those watersheds.
Limits of Study:,
the City Limits,
Grapevine Lake, or
applicable.
Section 6.03 Responsibility for Off-Site Study
B.
The
the
the
off-site study shall extend either to
Corp of Engineer's property surrounding
Extraterritorial Jurisdiction line where
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A.
First Development: It shall be the responsibility of the first
development equal to or greater than 10% of the watershed flowing
into the lowest point of the tract, by Preliminary Plat, Concept
Plan, or Final Plat, to perform the drainage study to the limits
as described in the previous section.
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B. Credit for Cost of Study: The land owner initially respon-
sible for obtaining the Off-Site Study shall be allowed to
credit the cost of the study towards his participation in the
off-site improvements as outlined in this article. The cost of
this study shall be approved by the Director of Public Works. Any
costs deemed unreasonable shall not be credited toward the cost of
off-site improvements.
Section 6.04 Requirements of Off-Site Study
A. Complete Watershed: The Off-Site Study shall include the complete
watershed which drains to the limit of the study as outlined
above. This is regardless of the location of the development
within that watershed.
B. Accuracy Level: The Off-Site Study shall be performed under
the criteria of the Preliminary Drainage Study with the following
additions:
1.
All existing drainage structures shall be noted as to
type and size, and current condition.
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2.
All proposed critical drainage structures shall be determined
as to type and size.
3.
An accurate acreage breakdown of the
and each of the tributary watersheds
flow line of the main water shed.
entire
leading
watershed
into the
C. Cost Determination: Included with the Off-Site Study shall
be an itemized cost estimate of all critical structures within the
watershed downstream. This shall include, but not be limited to,
the following:
1. Cost of removing existing structures where applicable.
2. Cost of repairing or improving existing structures where
applicable.
3. Cost of installing new structures.
4. Cost of improving or maintaining existing open channels.
5. Cost of designing the structures and preparing construction
plans and documents sufficient to obtain competitive bids.
Section 6.05 Off-Site Easement Acquisition
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A.
Any necessary easements not dedicated by platting shall be
procured by separate instrument and shall be the developer
or property owner's responsibility. If the developer or property
owner cannot obtain a required off-site easement, then the
developer or property owner may request that the City assist in
the acquisition. The developer must make an offer in writing,
based on the fair market value of the easement, to the property
owner from whom the easement is being acquired. In any event, all
costs of obtaining the easement shall be the responsibility of the
developer or property owner and the City must be reimbursed for
any costs incurred.
Section 6.06 Cost Participation for Off-Site Improvements
A. Adjacent Downstream Structures: Drainage structures which
are adjacent to developments shall be paid for as follows:
1.
2.
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If the development covers 60% or
serviced by the adjacent structure,
bility of the developer to install
structure.
more of the watershed
it shall be the responsi-
and pay for the adjacent
If the development covers less than 60% of the watershed
serviced by the adjacent structure, it shall be the responsi-
bility of the developer to install and pay for the adjacent
structure, but the City shall reimburse the developer on a
pro-rata per acre basis when the remaining acreage develops.
This will be on the current cost of the improvements and
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shall extend for no longer than a five-year period.
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B.
Other Downstream Improvements: The developer of any tract
of land within a watershed serviced by a critical structure
as outlined in the City Conceptual Drainage Plan shall participate
in the cost of improving that structure on a percentage formula
having a per-acre of watershed coefficient and a land use coeffic-
ient as follows.
1. Within the watershed serviced by said critical structure,
areas shall be delineated showing the more intense land use
of the existing zoning or the proposed land use plan.
2. The "CAW shall be determined for the entire watershed
as a whole to the point of design for the critical structure.
3. The "CAW factor shall be determined for the subject tract.
4. The "CAW factor for the subject tract shall be taken as
a percentage of the "CAW factor for the entire watershed.
This shall be the percentage responsibility of the subject
tract.
5. This percentage shall then be multiplied with the cost
of the critical structure to obtain the dollar amount
of contribution required by the subject tract.
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Section 6.07 Construction of Off-Site Improvements
A. Remaining capacity in critical structure: When the critical
structure being impacted by the proposed development still
has capacity to handle the increase in runoff created by the
development, the developer shall not be responsible for the
construction improvements to the structure or replacement
thereof. The developer will be responsible for satisfying
the monetary obligation for participation as outlined in the
previous section.
B. No capacity remaining: Should the proposed development create
runoff which exceeds the capacity of the critical structure, it
shall be the responsibility of the developer to construct the
ultimate improvements needed to said structure.
1. Prior Contributions: The City shall be responsible for
transferring all funds from previous developments contri-
bution to the specific structure to the developer who must
construct said improvements.
2.
Future Refunding: The City shall be responsible for procur-
ing additional participatory funds from other developers
within said watershed and transferring these funds to the
developer responsible for constructing the improvements.
This shall only extend for a period of five years from the
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date of acceptance Df the structure by the City inspection
department.
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ARTICLE 7
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DRAINAGE STUDY REVIEW PROCESS
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Section 7.01 Submittal
A. Coordination of Processing: The drainage studies as required
herein shall be submitted to the Public Works Secretary for
processing. The applicant shall receive all review letters from
the Public Works Secretary and shall submit any revisions to the
Public Works Secretary.
B.
Fees: All
shall cover
and Final
charged for
fees submitted for Preliminary Plats and Final Plats
the cost of reviewing the Preliminary Drainage Study
Drainage Study as required. Additional fees may be
the following submittals:
1. A preliminary Drainage Study required with the Concept
Plan during a change in zoning.
2. All computer models.
3. The Off-Site Study for a major watershed.
C.
Reproductions: The Public Works Secretary
requirements for reproductions to be submitted.
responsibility of' the applicant to verify these
to submittal.
shall maintain the
It shall be the
requirements prior
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Section 7.02 Responsibility for Review
A. Director of Public Works: The Director of Public Works shall have
the responsibility of initiating the review by the City Engineer.
He shall additionally have responsibility for all negotiations
with the owner during the review process.
B. City Engineer: The City Engineer shall have responsibility
for determination of technical compliance with City ordinances and
standard engineering practices. He shall provide a written review
of all drainage studies requested for review by the Director of
Public Works. The City Engineer shall work closely with the
applicant's Engineer to help the applicant resolve all defic-
iencies in the study and shall provide an updated review upon
resubmittal of the revised drainage study by the applicant.
C. Approval: The Director of Public Works shall have final approval
of the drainage'study. City Council shall have final approval of
all cost participation for the development currently submitted.
D.
Appeals: Any appeal of the decision of the Director of Public
Works shall be in writing, expressing the points of disagreement
and proposed alternatives. This written appeal shall be scheduled
on the next available City Council meeting, at which time the
applicant shall make a presentation supporting his appeal. The
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determination by the City Council shall be final.
Section 7.03 Impact on Subdivision Approval
A. Downstream Hazards: Where it is anticipated that additional
runoff incidental to the development of the subdivision will
overload an existing downstream drainage facility, whether
natural or man-made, and result in hazardous conditions, the
Planning Commission and/or Council may withhold approval of
the subdivision until appropriate provision has been made to
accommodate the problem, and plans shall be provided which
include all necessary offsite improvements including storm
sewer systems, channel grading, driveway adjustments, culvert
improvements, etc.
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ARTICLE 8
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RETENTION AND DETENTION POLICY
Section 8.01 General
A. Intent: It is the City's intent to consider retention and
detention of stormwater runoff as a solution towards the adequate
control of potential hazards created by stormwater runoff.
B.
Scale of Review: The
shall be considered on
as follows:
retention and
two different
detention of stormwater
scales of development
1. Development Scale: The larger development scale project
shall consider the use of stormwater management basins,
retention ponds and similar solutions for controlling peak
runoff.
2. Site-Specific Scale: The site-specific scale shall involve
those tracts which are not being subdivided or have been
subdivided prior to the implementation of this ordinance.
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Section 8.02 Development Scale Projects
A. Review Process: Development scale projects shall be reviewed
during the plat review process.
B. When Required: Retention/detention within a development may
be required for any of the following reasons or other reasons
deemed appropriate:
1.
Existing homes, businesses, or
downstream are currently at
elevation such that any increase
them into a flood situation.
other habitable structures
a flood level, or are at an
in upstream runoff would put
2. The runoff intensity of the development is greater than
the runoff intensity used for the development while preparing
the conceptual drainage plan.
3. The developer may choose to provide retention/detention
within the development of his own accord.
C. Solutions: It shall be the responsibility of the developer's
professional engineer to propose a reasonable design solution and
provide necessary calculations to justify the proposal. Options
to specifically consider may include the following:
1.
Check Dams: Small dams or drop structures constructed
of concrete, gabions, or rip-rap and located in a
drainageway. Typically used in areas of excessive grades to
reduce velocity, to provide some storage, and reduce erosion.
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2.
Detention Ponds: Detention ponds are designed
water only during runoff periods. The high runoff
intense rainfalls are captured in the control
released slowly over several hours.
to contain
flows from
basin and
3.
Retention Ponds: Retention ponds
flood storage capacity in addition to
During dry weather, retention ponds
or aesthetic purposes.
are designed to have
their normal contents.
are used for recreation
Section 8.03 Site-Specific Scale
A.
B.
Review Process: The application for
initiate a Site-Plan review process
properties. This review shall include
drainage.
building permits shall
on all non-residential
a review of the site
When Required: The
site drainage for any
deemed appropriate:
1. Overdeveloped Runoff: The runoff from the site is greater
than the runoff "C" factor for the use as determined in
Section 2.03 of this ordinance.
2.
,..,...
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City may require retention/detention of
of the following reasons or other reasons
Change in Use: The use of the site has increased in inten-
sity of runoff since the approval of the subdivision, or
since the approval of this ordinance.
C. Solutions: It shall be the responsibility of the developer's
professional engineer to propose a reasonable design solution and
provide necessary calculations to justify the proposal. Options
to specifically consider may include the following:
1. Parking Lot Storage: This might include depressions in
the pavement allowing temporary ponding of water and con-
trolled discharge into the drainage system. This might also
include either central or peripheral grassed areas to hold
and filter runoff water. Any accumulation in a paved area
shall maintain a depth of less than one (1) foot.
2. Rooftop Storage: Highly impervious areas such as industrial
and commercial districts, having buildings with flat roofs,
may allow this type of temporary storage.
3.
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On-Site Detention Ponds:
water is typically dispersed
lation.
Grass lined depressions where
through evaporation or perco-
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ARTICLE 9
,~~
MISCELLANEOUS PROVISIONS
..........
Section 9.01 Contingent Warning
A. The degree of flood protection required by this ordinance is
considered reasonable for regulatory purposes and is based
on engineering and scientific methods of study. Larger floods may
occur on rare occasions or flood heights may be increased by
man-made or natural causes, such as bridge openings restricted by
debris. This ordinance does not imply that areas outside flood
plain areas or land uses permitted within such districts will be
free from flooding or flood damages.
Section 9.02 Maintenance Issues
A. General: The City considers the issue of maintenance very
important and herein have outlined the responsibilities for
maintenance of all drainage easements and structures.
B.
Drainage Easements With No Structures:
bility of the owner to maintain all land
easement.
It shall be the responsi-
contained in a drainage
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Drainage Easements With Surface Structures: It shall be the
responsibility of the owner to maintain all land and surface
structures within a drainage easement. This shall include
periodic flushing, hosing, or brooming of surface structures
sufficient to maintain the intended flow of water in the
structure. Maintenance shall not include the replacement of
structures (concrete flumes, etc.) which have deteriorataed
due to age, or which have been destroyed by erosion or other
natural causes. The City shall replace these structures as
funding becomes available at the discretion of the City Manager.
D. Bar Ditches and Culverts: Although these items are typically
found in R.O.W. dedicated to the City, maintenance of these items
shall be the responsibility of the individual land owner. This
shall include all maintenance as outlined in the definitions as
well as periodic grading or earthwork needed to maintain the
intended cross-section of the ditch and to maintain a positive
flow of drainage across the property. Maintenance shall also
include periodic cleaning of culverts to remove all sediment or
other hindrances to the flow of water. Culverts shall be replaced
by the owner should any structural failure in the culvert poten-
tially impede the flow of water.
C.
Section 9.03 Enforcement
A.
Development Permit: No development shall be allowed within
the limits of the flood plain until the developer/owner has
received a development permit from the City. This shall include
grading plans and other requirements as outlined by the Director
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of Public Works.
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B.
Building Permit: No building permits shall be issued for proper-
ties which have not been analyzed for potential flooding, do not
have applicable floodway or flood plain limits shown, potentially
require a finish floor elevation in excess of that proposed, or do
not fulfill the requirements of this ordinance.
C. Final Plat Filing: The City shall not approve any Plat for
filing in the County Plat Records that does not meet the require-
ments of this ordinance.
Section 9.04 Modifications and Variations
A. Compliance: Where the Council finds that compliance with these
regulations would cause unusual hardship or extraordinary diffi-
culties because of exceptional and unique conditions of access,
location, shape, size, drainage, or other physical features of the
site, the requirements may be modified to mitigate the hardship,
provided that the public interest is protected and the development
is in keeping with the general spirit and intent of this
ordinance.
1. This section shall not be interpreted to permit the develop-
ment of land which is inherently unsuitable for the use
proposed.
2. Any modification will not have the effect of preventing
the orderly subdivision of other land in the area in
accordance with the provisions of this ordinance.
B. Discretion of Council: At the discretion of the Council, the
normal standards and requirements of this ordinance may also be
modified in the case of a Planned Unit Development. Such depar-
tures from the standards specified may be made only when the
Council finds that the plan provides for convenience and safe
access, adequate space for recreation, and provision for light and
air, and offers all essential utility services and necessary
public and other facilities, an is in conformance with all
provisions of the City Code which specifically apply to Planned
Development.
Section 9.05 Violations:
A. Fines: Any person, firm, corporation, agent or employee thereof
who violates any of the provisions of this ordinance shall be
guilty of a misdemeanor and upon conviction thereof shall be fined
not to exceed Two Thousand Dollars and No Cents ($2000.00) for
each offense. Each day that a violation is permitted to exist
shall constitute a separate offense.
B.
Injunctions:
action in a
The city
court of
shall have
competent
the right
jurisdiction
to
to
institute an
enjoin the
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violation of any prov1s1on of this ordinance within it's municipal
boundary or within its extraterritorial jurisdiction, and this
remedy shall be in addition to any penal provision in this
ordinance or in the Code of the City of Southlake.
Section 9.06 Severability of provisions:
A. It is hereby declared to be the intention of the City Council of
the City that any word, phrase, clause, sentence, paragraph,
section or part in or of this ordinance shall be severable.
B. If any court of competent jurisdiction shall judge any word,
phrase, clause, sentence, paragraph, section or part in or
of this ordinance to be invalid, such judgement shall not affect
any other word, phrase, clause, sentence, paragraph, section or
part in or of this ordinance not specifically included in said
judgement.
C. If any court of competent jurisdiction shall judge invalid
the application of any provision of this ordinance to a particular
property, building, or other structure, which judgement shall not
affect the application of said provision to any other property,
building, or structure not specifically included in said judge-
ment.
Section 9.07 Conflicting Ordinances
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This Ordinance shall be and is hereby declared to be cumulative of
all other ordinances of the CitY1 and this Ordinance shall not
operate to repeal or affect any of such other ordinances except
insofar as the provisions thereof might be inconsistent or in
conflict with the provisions of this Ordinance, in which event
such conflicting provisions, if any, in such other ordinance or
ordinances are hereby repealed.
Section 9.08 Liability Disclaimer:
A.
A. General: All of the regulations provided in this Ordinance
are hereby declared to be governmental and for the health,
safety and welfare of the general public. Any member of the
City Councilor a City Official or employee charged with the
enforcement of this Ordinance, acting for the City of Southlake in
the discharge of his duties, shall not thereby render himself
personally liable1 and he is hereby relieved from all personal
liability for any damage that might accrue to persons or property
as a result of any act required or permitted in the discharge of
his said duties.
B. Professional Liability: The Professional Engineer responsible for
preparing the drainage study shall retain liability for said
drainage study, regardless of any action taken by the City or the
City's Engineer concerning the study.
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ARTICLE VIII
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Section 8.01
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A.
B.
MISCELLANEOUS REQUIREMENTS
Lottina Reauirements:
Every lot shall abut on a Public Street or a private street.
All lots, regardless of zoning or whether or not zoned, that
are not served by a public or quasi-public community sewer
system, shall contain a minimum area of one acre to support
a private septic tank and leach field. Commercial or
Industrial lots may be allowed a smaller lot size upon
approval of the proposed sewage treatment system by the
Director of Public Works. A subdivision may, at the
discretion of the Commission, be deemed to be served by a
public sewer system if a Developer Agreement has been executed
with the City outlining provisions for extending public sewer
service to the development and providing for paYment by the
development of all required approach main, connection and
impact fees necessary to acquire the service.
C.
Double fronted residential lots shall not be allowed.
However, lots which are backed up to an arterial street shall
be allowed when there is no access allowed from these lots to
the arterial street.
All lot lines shall be perpendicular to the R.O.W. lines or
radial in the case of a cul-de-sac or curvilinear design.
A row or tier of lots having a minimum lot width of 125 feet
at the rear property line shall be provided adjacent to any
property meeting either of the following criteria:
1. The tract is currently zoned or platted residential and
contains lots of one acre or larger.
2. The tract is shown on the approved City Land Use Plan to
be designated for lots of one acre or larger in size.
3. Buffer lots - 30,000 minimum next to platted SFl or R40
subdivision.
G.
All corner lots within the municipal city limits shall have
setback lines on both streets equal to the front setback line
as required by the Zoning Ordinance unless such lots align
back-to-back with another lot which would allow both lots to
show a side-yard setback along the side street.
H.
All lots within the Extraterritorial Jurisdiction of the City
shall have a minimum 40 I building setback line from all
streets adjacent to the lot.
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All lots within the City Limits shall meet the requirements
of the zoning ordinance of the City.
Section 8.02 Sight Triangle:
A.
B.
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C.
Definition: A sight triangle shall be the triangle created
by connecting a point which is 10 feet along the R.O.W. at the
intersection and a point extending away from the intersection
a distance of 40 feet. This line shall extend by projection
to the back of curb on improved streets or the edge of
pavement on unimproved streets along both streets impacted.
The sight triangle herein referenced shall include all area
between the above defined line and the street pavement.
Restriction: There shall be no tree, shrub, plant, sign,
soil, fence, retainer wall or other view obstruction having
a height greater than two (2) feet within the sight triangle
as defined above. This height shall be measured above a line
drawn between the top of curb or edge of pavement of both
streets at the point where the referenced line intersects the
top of curb or edge of pavement.
1. This restriction shall not apply to trees within the
triangle having a diameter of less than twelve (12)
inches when such trees are trimmed at all times so that
no branch or growth is less than seven (7) feet above the
above referenced measurement line.
Plat Requirement: All final plats which are subject to the
regulation of this ordinance and have intersections of public
R.O.W. shown on the plat shall have the following statement
on the face of the plat prior to filing in the county Plat
Records.
liThe owners of all corner lots shall maintain sight triangles
in accordance with the city Subdivision Ordinance."
Section 8.03 Monuments and Markers:
A. Permanent Survey Reference Monuments: Concrete monuments,
eight (8) inches in diameter and twelve (12) inches long,
shall be placed on all boundary corners which are along
existing dedicated R.O.W. at the perimeter of the
subdivision. A 5/8" diameter iron rod having a minimum length
of 18" shall be placed flush with the top and at the center
of the concrete monument. The monuments shall be set at such
an elevation that they will not be disturbed during
construction and the top of the monument shall be flush with
or just below the finished ground elevation. (See detail
sheets)
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B.
other Markers: Lot corners, block corners, curve points, and
angle points shall have markers which are five-eights (5/8)
inch reinforcing bar, eighteen (18) inches long, or approved
equal, and shall be placed at all corners flush with the
ground, or below ground, if necessary, in order to avoid being
disturbed.
C. Installation of Monuments. Monuments shall be installed
before recordation of the final plat except in those cases
where the subdivider assures that the improvements will be
made in accordance with this ordinance and that, upon
completion of all improvements, he will install monuments as
required herein. In such case, the subdivider's engineer or
surveyor shall furnish the city a letter of assurance
certifying that he will install the monument as required.
D. Monuments in streets: When placing of monuments in streets
is postponed, adequate ties to the boundary line shall be
shown on the plat in order that monuments may be correctly
located and installed following the paving of streets.
E. Benchmark Monuments on Headwalls: A brass cap approximately
2" in diameter shall be placed on top and at one end of all
culvert headwalls within or at the perimeter of the
development.
F.
Monument Verification. Prior to acceptance of subdivision
improvement by the City, the developer's surveyor or engineer
shall certify that all monument and markers are in place and
correctly positioned. No building permit shall be issued
prior to acceptance of the subdivision.
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ARTICLE IX
MISCELLANEOUS PROVISIONS
section 9.01
Modifications and Variations:
A. Compliance: Where the Council finds that compliance with
these regulations would cause unusual hardship or extraordi-
nary difficulties because of exceptional and unique conditions
of access, location, shape, size, drainage, or other physical
features of the site, the requirements may be modified to
mitigate the hardship, provided that the public interest is
protected and the development is in keeping with the general
spirit and intent of this ordinance.
1. This section shall not be interpreted to permit the
development of land which is inherently unsuitable for
the use proposed.
2. Any modification will not have the effect of preventing
the orderly subdivision of other land in the area in
accordance with the provisions of this ordinance.
B.
Discretion of Council: At the discretion of the council, the
normal standards and requirements of this ordinance may also
be modified in the case of a Planned unit Development. Such
departures from the standards specified may be made only when
the Council finds that the plan provides for convenience and
safe access, adequate space for recreation, and provision for
light and air, and offers all essential utility services and
necessary public and other facilities, and is in conformance
with all provisions of the City Code which specifically apply
to Planned Unit Development.
Section 9.02 Violations:
A. Fines: Any person, firm, corporation, agent or employee
thereof who violates any of the provisions of this ordinance
shall be guilty of a misdemeanor and upon conviction thereof
shall be fined not to exceed. The above penalty shall not
apply to a violation in the City'S extraterritorial
jurisdiction. Two Thousand Dollars and No Cents ($2,000.00)
for all violations affecting involving fire safety or public
health and sanitation and Five Hundred Dollars and No Cents
($500.00) for all other violations. Each day that a violation
is permitted to exist shall constitute a separate offense.
B. Injunctions: The City shall have the right to institute an
action in a court of competent jurisdiction to enjoin the vio-
lation of any provision of this ordinance within it's municip-
al boundary or within its extraterritorial jurisdiction, and
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C.
this remedy shall be in addition to any penal provision in
this ordinance or in the Code of the City.
Permit Denial: No building, plumbing, electrical, mechanical,
excavation, permits, zoning actions, certificates of occupancy
or authorizations for utility service connection shall be made
for any construction, activity or occupancy occurring on a
lot, tract or parcel in an unrecorded subdivision or
development until the subdivision or development is brought
into compliance with the terms and conditions of this
Ordinance.
Section 9.03 Severability of provisions:
A.
B.
~ C.
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It is hereby declared to be the intention of the City Council
of the city that any word, phrase, clause, sentence,
paragraph, section or part in or of this ordinance shall be
severable.
If any court of competent jurisdiction shall judge any word,
phrase, clause, sentence, paragraph, section or part in or of
this ordinance to be invalid, such judgement shall not affect
any other word, phrase, clause, sentence, paragraph, section
or part in or of this ordinance not specifically included in
said judgement.
If any court of competent jurisdiction shall judge invalid the
application of any provision of this ordinance to a particular
property, building, or other structure, which judgement shall
not affect the application of said provision to any other
property, building, or structure not specifically included in
said judgement.
Section 9.04 Conflictinq Ordinances:
A. This Ordinance shall be and is hereby declared to be
cumulative of all other ordinances of the City; and this
Ordinance shall not operate to repeal or affect any of such
other ordinances except insofar as the provisions thereof
might be inconsistent or in conflict with the provisions of
this Ordinance, in which event such conflicting provisions,
if any, in such other ordinance or ordinances are hereby
repealed. Ordinance No. 160-A, as amended, and Ordinance No.
443 are hereby repealed in their entirety.
section 9.05 Personal Disclaimer:
A. All of the regulations provided in this Ordinance are hereby
declared to be governmental and for the health, safety and
welfare of the general public. Any member of the City Council
or a City Official or employee charged with the enforcement
of this Ordinance, acting for the City in the discharge of
9-2
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his duties, shall not thereby render himself personally
liable; and he is hereby relieved from all personal liability
for any damage that might accrue to persons or property as a
result of any act required or permitted in the discharge of
his said duties. Further disclaimer that review of documents
doesn't make city liable.
section 9.06 Preservation of Rights:
All rights and remedies of the City of Southlake are expressly
saved as to any and all violations of the provisions of Ordinance
No. 160-A, or any other ordinances affecting platting or the
subdivision of land which have accrued at the time of the effective
date of this ordinance; and, as to such accrued violations and all
pending litigation, both civil and criminal, whether pending in
court or not, under such ordinances, same shall not be affected by
this ordinance but may be prosecuted until final disposition by the
courts.
section 9.07 Conversion to Pamphlet Form:
The City Secretary of the City of Southlake is hereby
authorized to publish this ordinance in book or pamphlet form for
general distribution among the public, and the operative provisions
of this ordinance as so published shall be admissible in evidence
in all courts without further proof than the production thereof.
~ section 9.08 Notice and Publication:
The City Secretary of the City of Southlake is hereby directed
to publ ish the proposed ordinance or its caption and penalty
together with a notice setting out the time and place for a public
hearing thereon at least ten (10) days before the second reading
of this ordinance, and if this ordinance provides for the
imposition of any penalty, fine or forfeiture for any violation of
any of its provisions, then the city Secretary shall additionally
publish this ordinance in the official City newspaper one time
within ten (10) days after passage of this ordinance, as required
by Section 3.13 of the Charter of the city of Southlake.
section 9.09 Effective Date:
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This ordinance shall be in full force and effect from and
after its passage and publication as required by law, and it is so
ordained.
9-3
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/ ,,~ ~ PA~SED ,AND APPROVED ON FIRST READING ON THIS
r'J f..LL Cr' ~ )'4<-LL/' , 1989.
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CITY SECRETARY
PASSED
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AND APPROVED ON SECOND READl:NG ON THl:S d-
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, 19-&9.
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ATTEST:
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CITY SECRETARY
APPROVED AS TO FORM AND LEGALITY:
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City Attorney
Date: /-;;l - 90
ADOPTED: I-~ - 90
EFFECTIVE: I -~ - 90
9-4
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DAY OF
DAY OF
~-L
These appendices are not to be considered a part of this ordinance
~\ and may be revised or updated as necessary by the City staff.
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********* FORM
***********
APPENDIX 1
DEDICATION FOR INDIVIDUAL
OR
INDIVIDUALS
OF
STATE OF TEXAS
COUNTY OF
WHEREAS, I,
, am the sole owner (or
, are all of the
we,
owners) of a tract of land situated in the
___survey, Abstract , county of
according to the deed recorded in Volume , Page
DRTCT, and more particularly described as follows:
******** Insert legal description here ********
NOW, THEREFORE, KNOW ALL MEN BY THESE PRESENTS:
THAT, I,
, being the sole owner (or
we,
, being all of the
owners) do hereby adopt this plat designating the hereinabove
described property as
an addition to the City of Southlake, Tarrant County, Texas, and
I (we) do hereby dedicate to the public's use the streets, (alleys,
parks) and easements shown thereon.
WITNESS my (our) hand (s) at Southlake, Tarrant County, Texas
this the day of , 19 ____.
Owner
STATE OF TEXAS
COUNTY OF
BEFORE ME, the undersigned authority, on this day personally
appeared , known to me to be the
person(s) whose name(s) is/are subscribed to the above and
foregoing instrument, and acknowledged to me that he/they executed
the same for the purposes and consideration expressed and in the
capacity therein stated.
GIVEN UNDER MY HAND AND SEAL OF OFFICE on this the
day of , 19
**Seal**
Notary Public
Commission expires:
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These appendices are not to be considered a part of this
~~ ~~~~~~nce and may be revised or updated as necessary by the City
APPENDIX 2
****** FORM OF DEDICATION FOR CORPORATION. PARTNERSHIPS.ETC. ******
."..,..."
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STATE OF TEXAS
COUNTY OF
WHEREAS, , acting by and
through the undersigned, its duly authorized agent, is the sole
owner of a tract of land situated in the
, Survey, Abstract , County of
_, according to the deed recorded in Volume , Page
__, DRTCT, and more particularly described as follows:
******* Insert legal description here ********
NOW, THEREFORE, KNOW ALL MEN BY THESE PRESENTS:
That, , by and
through the undersigned, its duly authorized agent, does hereby
adopt this plat designating the hereinabove described real property
as , an adddition to the
City of Southlake, Tarrant County, Texas, and I (we) do hereby
dedicate to the pUblic's use the streets, (alleys, parks) and
easements shown thereon.
WITNESS my (our) hand(s) at Southlake, Tarrant County, Texas
this the day of , 19
STATE OF TEXAS
COUNTY OF
BEFORE ME, the undersigned authority, on this day personally
appeared of
, a corporation (partnership, JV) ,
known to me to be the person(s) whose name(s) is/are subscribed to
the foregoing instrument, and acknowledged to me that he/they
executed the same for the purposes and consideration therein
expressed, in the capacity therein stated and as the act and deed
of said corporation (partnership, JV).
GIVEN UNDER MY HAND AND SEAL OF OFFICE on this the
day of , 19
**Seal**
Notary Public
commission expires:
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These appendices are not to be considered a part of this
~ ordinance and may be revised or updated as necessary by the City
(......; Staff.
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APPENDIX 3
********* AVIGATION EASEMENT AND RELEASE ************
THE STATE OF TEXAS
COUNTY OF TARRANT
KNOW ALL MEN BY THESE PRESENTS:
WHEREAS, hereinafter called
"Owner" (whether one or more), is the owner of that certain parcel
of land situated in or within the extraterritorial jurisdiction of
the City of Southlake, Tarrant and Denton Counties, Texas, being
more particularly described hereon for all purposes:
NOW, THEREFORE, in consideration of the sum of ONE AND 00/100
($1.00) DOLLAR, and other good and valuable consideration, the
receipt and sufficiency of which is hereby acknowledged and
confessed, owner(s) do(es) hereby waive, release, quitclaim, and
forever hold harmless the City of Southlake, Texas, a municipal
corporation, hereinafter call "City", from any and all claims for
damage of any kind that Owner(s) may now have or may hereinafter
have in the future by reason of the passage of all aircraft
("aircraft" being defined for the purposes of this instrument as
any contrivance now known or hereinafter, invented, used, or
designed for navigation of or flight in the air) by whomsoever
owned and operated, in the air space above Owner's property, as
hereon before described, and above the surface of Owner's property
such noises, vibration, fumes, dust, fuel, and lubricant particles,
and all other effects that may be caused by the operation of
aircraft landing at or taking off from, or operating at or on the
Dallas/Fort Worth International Airport; and Owners do hereby fully
having remiss, and release any right or cause of action which it
may now have or which it may in the the future have against the
City, whether such claim be for injury to person or damage to
property due to noises, vibration, fumes, dust, fuel and lubricant
particles, and all the other effects that may be caused or may have
been caused by the operation of aircraft landing at, or taking off
from, or the operation and/or maintenance of aircraft or aircraft
engine at or on said Dallas/Fort Worth International Airport.
It is agreed that this release shall be binding upon the Owner,
their heirs and assigns, and successors in interest with regard to
said property located in or in the extraterritorial jurisdiction
of the City of Southlake, Tarrant County, running with the land,
and shall be recorded in the Deed Records of Tarrant County or
Denton County, as appropriate, Texas.
Executed this day of , A.D., 19
(Owner)
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These appendices are not to be considered a part of this ordinance
~. and may be revised or updated as necessary by the City staff.
~~ APPENDIX 4
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********** EASEMENT ABANDONMENT ************
The City of Southlake has adopted the following procedures for the
abandonment of recorded easements. If the property is being
platted then the statement and signature block shown below should
be added to the Final Plat. It will be the responsibility of the
applicant to obtain original signatures from the utility company
representatives on the mylar to be filed at the county, prior to
the Zoning Clerk obtaining the signatures of approval by the City.
If the property is not being platted, a mylar exhibit clearly
defining the easement by metes and bounds must be prepared and
include the following approval block and the required signatures
must be obtained as outlined above. The following addresses and
phone numbers are provided for your convenience.
Texas utilities
P.o. Box 609
Euless, Texas 76039
Frank Friudenberg - 355-7056
Customer Service supervisor
Tri-County Electric Co-op
525 East Price Street
Keller, Texas 76248
Marvin L. Daniel - 431-1541
Line Foreman
General Telephone Company
P.o. Box 128
Lewisville, Texas 75067
Roy Johnson - 434-2027
336-8381
project Coordinator
Lone Star Gas Company
100 W. Morningside Drive
Fort Worth, Texas 76110
Tommy R. Galloway
Engineering supervisor
(The following to be provided on final plats or exhibits)
We, the undersigned, as duly authorized representatives of the fol-
lowing util i ty companies, hereby express no obj ection to the
abandonment of the easement so noted on this plat (exhibit), said
easement being previously recorded in Vol. , Page of
the Records of County, Texas.
Date:
Date:
Frank Friudenberg
Customer Service supervisor
Texas utilities
Marvin L. Daniel
Line Foremen
Tri-County Electric Coop.
Date:
Date:
Tommy R. Gallaway
Engineering Supervisor
Lone Star Gas
Roy Johnson
project Coordinator
General Telephone Co.
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,
These appendices are not to be considered a part of this
~ ordinance and may be revised or updated as necessary by the City
C-.....-I Staff.
APPENDIX 5
********** MISCELLANEOUS FINAL PLAT NOTES OR REOUIREMENTS ************
The following shall be on the face of all final plats, plat
revisions plat showings, or amended plats.
SURVEYOR'S CERTIFICATION:
THIS is to certify that I, , a Registered
Public Surveyor of the State of Texas, having platted the above
subdivision from a actual survey on the ground; and that all lot
corners, and angle points, and points of curve shall be properly
marked on the ground, and that this plat correctly represents that
survey made by me or under my direction and supervision.
original
***Seal***
Name:
Texas Registration No.
DEED RESTRICTION STATEMENT
.............,
, . "This plat does not increase the number of lots or alter or remove
... ~j existing deed restriction or covenants, if any, on the property."
MINIMUM FINISH FLOOR STATEMENT (all final plats Showing minimum
F.F.)
"The City of Southlake reserves the right to require ml.nl.mum finish
floor elevations on any lot contained within this addition. The
minimum elevations shown are based on the most current information
available at the time the plat is filed and may be subj ect to
change. Additional lots, other than those shown, may also be
subject to minimum finish floor criteria."
FLOWAGE EASEMENT NOTE (On tracts adjacent to Grapevine Lake)
Elevation 572 is the boundary of the flowage easement as outlined
by the U.S. Army Corps of Engineers. Any encroachments into this
easement must obtain written approval from the Reservoir Manager
at the
following address:
Grapevine Lake Project Office
U.S. Army Corps of Engineers
Rt. 1, Box 10
Grapevine, Texas 76051
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C-'
APPENDIX 6
********** PREFERRED TITLE BLOCK FORMAT ********
~
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't ...
These appendices are not to be considered a part of this
~, ordinance and may be revised or updated as necessary by the City
C,.I Staff.
*********
APPENDIX 7
PROCEDURE FOR FILING PLATS - TARRANT COUNTY ***********
1. The
drawing
applicant shall make all corrections to the original
that are needed to comply with the conditional approval
of the plat. In addition, the following plat record
block shall be added just above the title block area:
THIS PLAT FILED IN CABINET
, SLIDE #
, DATE:
2. The applicant shall run 2 prints of the plat as revised and
submit them to the Zoning Clerk to establish that all
revisions have been made and the plat is ready to be filed.
The City Engineer may be requested to assist in this
determination.
3. Upon receiving notice that all plat requirements have been
met, the applicant shall run two (2) mylar reproducible copies
of the completely acceptable plat.
4.
~
c....... 5.
6.
7.
,..."
(....,;
The applicant shall then obtain (on both mylar reproducibles)
all oriainal signatures, notaries, and seals, of the owner,
notary, surveyor, and any utility representatives.
Both mylars shall then be submitted to the Zoning Clerk.
The City Secretary shall confirm that all fiscal agreements
have been completed and signed, and that all fees, taxes,
etc. have been paid.
Upon confirmation of compliance with all fiscal requirements,
the City Secretary shall obtain the original signatures of
the appropriate City representatives on both mylars.
8.
The City Secretary shall then see that the fiscal agreements
and one signed mylar are filed for record at the County
Courthouse.
The second mylar will be loaned to the City Engineer, who will
then make a reproducible mylar for their office and run two
(2) prints for the City files. The second mylar with original
signatures will then be returned to the City for filing in the
City Plat Records.
Note: No mylar of a plat will be accepted by the City which has
any original ink other than signatures and seals.
9.
A-7
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{,;" ,
!
These appendices are not to be considered a part of this
~.~ ordinance and may be revised or updated as necessary by the City
.~ Staff.
"......,
C~4.
,.......
c..,,;
APPENDIX 8
********* PROCEDURE FOR FILING PLATS - DENTON COUNTY
***********
1. The
drawing
applicant shall make all corrections to the original
that are needed to comply with the conditional approval
of the plat. In addition, the following plat record
block shall be added just above the title block area:
THIS PLAT FILED IN CABINET ___, SLIDE #
, DATE:
2.
The applicant shall run 2 prints of the plat as revised and
submit them to the Zoning Clerk to establish that all
revisions have been made and the plat is ready to be filed.
The City Engineer may be requested to assist in this
determination.
3.
Upon receiving notice that all plat requirements have been
met, the applicant shall run two (2) mylar reproducible copies
of the completely acceptable plat. (The applicant must make
the first mylar reproducible no larger than 18" x 24" to file
in Denton County. The second, which will remain in the City
records, should preferably be at the scale and sheet size of
the original.)
The applicant shall also run three (3) blueprints of the mylar
which is 18" x 24" in size. (The applicant may run only one
blueprint to get original signatures on, then run the other
two blueprints from the mylar which has original signatures
on it. Denton County requires signatures on the other two
blueprints as well but they don't have to be original. The
applicant may find it easier to get original signatures on all
three blueprints as well as both mylars.)
The applicant shall then obtain (on both mylar reproducibles
and at least one of the blueprints) all original signatures,
notaries, and seals, of the owner, notary, surveyor, and any
utility representatives.
5.
6.
Both mylars and the three blueprints shall then be submitted
to the Zoning Clerk.
The City Secretary shall confirm that all fiscal agreements
have been completed and signed, and that all fees, taxes,
etc. have been paid.
Upon confirmation of compliance with all fiscal requirements,
the City secretary shall obtain the original signatures of
approval from the appropriate ci ty representatives on both
mylars and at least one of the blueprints. (continued on sheet
2 of 2)
7.
8.
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,
Ap-pendix 8 Cont.
Denton County Procedures for filing Plats
(sheet 2 of 2)
9.
The City Secretary shall then see that the fiscal agreements
and one signed mylar and the three blueprints are filed for
record at the County Courthouse.
The second mylar will be loaned to the City Engineer, who will
then make a reproducible mylar for their office and run two
(2) prints for the City files. The second mylar with original
signatures will then be returned to the City for filing in the
City Plat Records.
10.
Notes:
1. No mylar of a plat will be accepted by the City which has
any original ink other than signatures and seals.
2. Denton County charges $20.00 per page for filing. This
shall be paid by the applicant.
A-9
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(- "
Fort Worth Star-Telegram
400 W.SEVENTH STREET•FORT WORTH,TEXAS 76102
'HE STATE OF TEXAS
,:ounty of Tarrant
Before me, a Notary Public in and for said County and State, this day
personally appeared ROSALIE RIVERA Billing Specialist for the Fort Worth
Star-Telegram, published by the Star-Telegram Inc • at Fort Worth, in Tarrant
County , Texas ; and who, after being duly sworn , did depose and say that the
following clipping of an advertisement was published in the above named
paper on the following dates :
DATE DESCRIPTION AD SIZE TOTAL
INCHfLINE RATE AMOUNT
DEC 24 6439295 CL . 358 1X58 L 58 • 60 34 .80
december 24
City of Southlake -"
ORDINANCE NO.482
AN ORDINANCE OF THE CI-
AS
ADOP LNG LA STORM
DRAINAGE POLICY,. RE-
QUIRING PRELIMINARY
AND FINAL DRAINAGE
STUDIES AND COMPUTER
DRAINAGE MODELS IN AP-
PROPRIATE CIRCUM- .
STANCES AND
VIW PROCESS •
THEREFOR; REQUIRING 1 �J`J�
THE SUBMISSION OF v
BONDS THEREFOR• PRO-
VIDING DESIGN CRITERIA
FOR ON-SITE AND OFF- N E D
SITE DRAINAGE AND
CHANNEL IMPROVE- 27ME, THIS THE DAY OF
SUBSCRIBED AND SI MENTS AND PROVIDING 27 DECENBER, 1989.
FOR THE MAINTENANCE
OF SAME•PROVIDING FOR
EASEMENT ACQUISITION; NOTARY PUBLIC /RL :______ __.__._ .. _..______
PROVIDING FOR VARI- (il
ANCES TO THE REQUIRE-
MENTS OF THIS ORDI- p •� ^,1,1 TEXAS
NANCE• PROVIDING FOR TARRANI -COUNTY, 1-EXAS
ADMINISTRATION AND EN- z. .z\ I
FORCEMENT AND PRES- -�?RyAN.
CRIBING PENALTIES FORiav, 'G4, SUE A. RUSSELL
THE VIOLATION OF THE R n,
NRNCEIPROVFTHISDINGOHAT �. '„ COMMISSION EXPIRES 1 AFFIDAVITS •OF3
THIS
CUMULATIVE OF ALL'i"fri. OCTOBER 27, 1993
ORDINANCES;PROVIDING N p wr ---- _
ti
A SEVERABILITY CLAUSE•
PROVIDING A SAVINGS
PUBLECAPROVIDING
IONI IN
PAM-
PHLET FORM,_.
A�TEAR AL FOR PUBLICATION IN THE
OFFICIAL NEWSPAPER;N AND RETURN THE LOWER PORTION WITH YOUR PAYMENT ----*
_
FECT VPROVIDING
DATE G AN EF-
PASSED AND APPROVED
THIS THE DAYOFDE- RmEMIT TO : 400 W • SEVENTH, FW, TX 76102
Fort
Worth
Stt
ary Flckes raayor of Southlakendra : RF.lI�IT TL1:ndra L.LeGrand ty Secretary
APPROVED AS TO FORM:
E.Allen Taylor ACCOUNT AMOUNT
6439295 CltyAttorney NUMBER CIT57 DUE 34 •80
PAGE IF 1
CITY OF SOUTHLAKE ORIGIN
667 N CARROLL LEASE PAY iih. 34 • 80
Pr
SOUTHLAKE TX 76092 0 THIS AMOUNT
ATTN : SANDRA LEGRAND
PLEASE WRITE IN AMOUNT ENCLOSED
Fort Worth Star-Telegram •
400 W SEVENTH STREET•FORT WORTH,TEXAS 76102
-HE STATE OF TEXAS
ounty of Tarrant
Before me, a Notary Public in and for said County and State, this day
personally appeared kOSH•Lu .IVC kA- Billing Specialist for the Fort Worth
Star-Telegram, published by the Star-Telegram Inc . at Fort Worth, in Tarrant
County, Texas; and who, after being duly sworn, did depose and say that the
following clipping of an advertisement was published in the above named
paper on the following dates :
DATE DESCRIPTION AD SIZE RATE AMOUNT
TOTAL
INCH/LINE
DEC 08 6432820 december 8 CL . 358 1X86 L 86 . 38 32 .68
NOTICE OF
PUBLIC HEARING
NOTICE Is hereby given to all
Interested persons that the CITY
Council of the Cityof Southlake,
Texas,will be holding a public
hearing on December 19, 1989
during the city council meeting
to begin at 7:30 p.m.667 North
Carroll Avenue, Southlake,
Texas.
Purposeofthehearingistocon-
sider the followingordinanceln
' second reading:
7 ORDINANCE NO.482
AN ORDINANCE OF
THE CITY OF SOUTH-
LAKE, TEXAS ADOPT-
S I G N E D ADOPT-
ING A STORM DRAIN-
AGE POLICY; `A
NARY AND FINAL AA REQUIRING R . .eie Ve '___......
SUBSCRIBED AND SWORN TO BEFORE ME , THIS THE I,► NA DRAINAGE STUDIES `
NOTARY PUBLIC AND R
DRAINAGEMODELSEN
APPROPRIATE CIR- '
CUMSTANCES AND
. PROVIDING A REVIEW
PROCESS THEREFOR; JNTY, TEXAS
REQUIRING THE SUB-
r
?I..sV2y MISSION OF BONDS
' -� SUE A. RUSSE1 THEREFOR; PROVID-
.n�, ING DESIGN CRITERIA rs • 0 0
► iI• COMMISSION EXPIRES FOR ON-SITE AND OFF-
AGE AND
/\:',~ OCTOBER 27, 1993 CHANNEL SITE InIMPROVE
e- FA+ MENTS AND PROVID-
111111111111 NG FOR THE MAINTE-
• NANCE OF SAME;
i MENTPROVIDING
DA QUIISITIION;
FOR EASE-
��1 ` PROVIDING FOR VARI-
ANCES TO THE RE-
TEAR ALONG THIS PERFORATION AND RETURN THE LOWER PORTION WI ORDINANCES OF PROVID-
ING44S -
FOR ADMINISTRA-
TION AND ENFORCE-
MENT AND
PRESCRIBING PENAL-
TIES FOR THE VIOLA-
TION OF THE PROVI-
ort Worth � �� ► SIGNS THIS
ORDINANCE• PROVI0.
REMIT TO: ING THAT Ti I-HIS oRD RT WORTH, TEXAS 76197
NANCE SHALAL L BE U-
MULATIVE OF ALL
ORDACCOUNT T NG IA SEVEII�ABILI Y
6432820 NUMBER CIT CLAUSE-PGS AUSIEIA , 32. 68
PRO-
VIDINGSA FOR PUBLICA-
TION IN PAMPHLET
PAGE 11 FORMFOR PUBLICATION PROVIDING
THE OFFICIAL NEWS-
PAPER,. AND PROVID-
ING AN EFFECTIVE
DATE.
SECTION 3
Any person firm or corpora-
tion who viol afes,di sobeys,om-
Its,neglects or refuses to com-
ply with or who resists the
enforcement of any of the prov I-
sions of this ordinance shall be
fined not more than Five Hun-
CITY OF SOUTHLAKE ORIGIN dred Dollars MOO.00)for each
offense.Each day that a viola-
PLEA tion is permitted to exist shall
667 N C A R R O L L constitute a separate offense. 32.68
SOUTHLAKE TX 76092 0 THIS i SandraSLuLeCkend
City Secretary
ATTN : SANDRA LEGRAND
PLEASE WRITE IN AMOUNT ENCLOSED