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Phone: (972)3043686
Fax: (972)3047041
ENGINEERING DEPARTMENT
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"City ojCoppell Engineering-Excellence By Design"
SUBDIVISION ORDINANCE OF THE CITY OF COPPELL, TEXAS ~~~
ORDINANCE NO. o/ ~{ 6 y3
AN ORDINANCE OF THE CITY OF COPPELL, TEXAS, AMENDING CHAPTER
13 OF THE COPPELL CITY CODE; PRESCRIBING RULES AND REGULATIONS
GOVERNING PLATS AND SUBDIVISIONS OF LAND WITHIN THE CORPORATE LIMITS
AND EXTRATERRITORIAL JURISDICTION OF THE CITY OF COPPELL, TEXAS,
CONTAINING CERTAIN DEFINITIONS; PROVIDING FOR PRELIMINARY PLAT;
PROVIDING FOR A FINAL PLAT AND PROVIDING FOR FINAL APPROVAL OF
SUBDIVISIONS AND SUBDIVISION PLATS; PRESCRIBING REGULATIONS FOR FILING
PLATS, SUBDIVISION CONSTRUCTION, ACCEPTANCE OF SUBDIVISIONS AND
ISSUANCE OF BUILDING PERMITS; PRESCRIBING FEES TO BE CHARGED;
REPEALING ANY PART OF ANY ORDINANCE IN CONFLICT WITH THIS
ORDINANCE; PROVIDING A SAVINGS CLAUSE; PROVIDING A SEVERABTLTTY
CLAUSE; PROVIDING PENALTIES FOR VIOLATION OF THIS ORDINANCE NOT TO
EXCEED THE SUM OF FIVE HUNDRED DOLLARS ($500.00) FOR EACH OFFENSE
AND ESTABLISHING AN EFFECTIVE DATE.
WHEREAS, by Chapter 212 of the Local Government Code, the laws of the State of
Texas provide that every owner of any tract of land situated within the corporate limits who may
divide the same in two or more parts for the purpose of laying out any subdivision of any tract
of land or any addition to any town or city, or for laying out suburban lots or building lots, or
any lots, and streets, alleys or parks or other portions intended for public use, or the use of
purchasers or owners of lots fronting thereon or adjacent thereto, shall cause a plat to be made
thereof which shall accurately describe all of said subdivision or addition by metes and bounds
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SUBDIVISION REGULATIONS - CTTY OF COPPELL. TERAS
APPENDIR C -DESIGN CRITERIA AND STANDARDS
~F.['TION I -STREETS AND ALLEYS
including sidewalks, are intended for future extension across these
rights-of--way, shall be constructed in right-of--way as required by the
Thoroughfare Plan for half the distance across the rights-of--way.
For railroad crossings, the City will participate to the extent of 254b
of the cost charged by the Railroad Company to construct the crossing
and signals and shall reimburse the Developer for such costs when
City funds become available. The remaining 75 9b of the costs shall
be shared by Developers of the four quadrants of the intersection of
the street and railroad. When, in the City Engineer's judgement, it is
not feasible to construct the street and/or railroad crossings at the time
of development of the subdivision, escrow for the Developer's portion
of the cost may be required.
Where a major arterial or minor arterial thoroughfare, or a State
Highway, is to be constructed, the Developer shall construct paving
a minimum width of 25 feet, if deemed necessary by the City
Engineer. The City will reimburse the cost of the excess width to the
Developer who installed the paving, at the Developer's contract price,
when City funds become available. When paving thickness in excess
of eight (8) inches is required, the City will reimburse the Developer
for the additional thickness when funds are available.
i. Technical Specifications. The specifications for materials and
workmanship shall conform to "Standard Specifications for Public
Works Construction," published by North Central Texas Council of
G~~ ow~ernments.
j. Far)ang ts. ar ng,lots for public use shall be constructed of a
minimum S" concrete on a prepared (lime or cement modified)
subgrade with adequate surface drainage. All fire lanes shall be
constructed of 6" concrete on a prepared (lime or cement modified)
subgrade with adequate surface drainage. Asphalt will not be permitted
for either parking lots or fire lanes. Additional requirements on the
subgrade are set forth in paragraph (n(E)(1)(a) (page 80).
k. Parking Space. Parking spaces shall be a minimum of 9'x20',
(10'x20' preferred).
1. Railroad Crossings. All railroad crossings shall be rubberized, as
approved by City Engineer.
m. Jogging and Bike Paths to require conformance to approved City of
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Standard Specifications for
Public Works Construction
North Central Texas
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Third Edition 1998
North Central Texas Councl of Governments
6T6 Six Flags Dtive, Suite 200 .
P. 0.5888
Arlington, Texas 76005-5888
~, - (817) 640-3300
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Item 5..8.2. PAVEMENT AND SURFACES COURSES
fished to the required line, grade and section with all surface voids filled. Where bar mats or wire mesh reinforcing is
specified, see Item 5.8.2.(d)(1) and (d)(2) for method of procedure.
(A) Tolerance Limits. While the concrete is still workable, it shall be tested for irregularities with a 10 ft. (3
m) straightedge placed parallel to the centerline of the pavement so as to bridge depressions and to touch all high
spots. Ordinates measured from the face of the straightedge to the surface of the pavement shall at no place exceed
'/fib inch per foot (1 mm per 20 cm) from the nearest point of contact. In no case shall the maximum ordinate to a 10
ft. (3 m) straightedge be greater than'/8 in. (3 mm). Any surface not within the tolerance limits shall be reworked and
refinished.
(B) Belting. While the concrete is still workable, the surface shall be given final belting in order to produce a
uniform surface of gritty texture. This belting shall be of short, rapid transverse strokes combined with a longitudinal
sweeping motion. When the burlap drag is permitted in lieu of the belting, the burlap drag finish shall be accom-
plished by drawing a wet drag over the surface in a longitudinal direction to produce a uniform surface of gritty tex-
ture.
(C) Edging. The edges of slabs and all joints requiring edging shall be cazefully tooled with an edger of the
radius required by the plans at the time the concrete begins to take its "set" and becomes non-workable. All such
work shall be left smooth and true to lines.
(D) Stamp or Die. All concrete including curbs, curb with gutter, sidewalks, alleys, driveways and structures
shall be marked by means of a substantial stamp or die so designed to make an impression in the finish of the con-
crete. The stamp or die shall designate the firm name or CONTRACTOR and the month and year in which the work was
done. The design of the stamp or die shall be approved by the Engineer.
(2) Hand. Hand finishing shall be permitted only in intersections and azeas inaccessible to a finishing machine.
The addition of one sack of cement per cubic yazd shall be required for all hand finish concrete.
When the hand method of striking off and consolidating is permitted, the concrete, as soon as placed, shall be
approximately leveled and then struck off and screeded to such elevation above grade that, when consolidated and
finished, the surface of the pavement shall be at the grade elevation shown on the plans. The entire surface shall then
be tamped and the concrete consolidated so as to insure maximum compaction and a minimum of voids. For the
strike off and consolidation, both a strike template and tamping template shall be provided on the work. In operation
the strike template shall be moved forwazd with a combined longitudinal and transverse motion and so manipulated
that neither end of the template is raised from the forms during the striking-off process. A slight excess of material
shall be kept in front of the cutting edge at all times.
The straightedge, belting and joint finishing shall be as hereinabove prescribed.
(i) Curing. The curing of concrete pavement shall be thorough and continuous throughout the entire curing period.
Failure to provide proper curing as herein prescribed shall be considered as sufficient cause for immediate suspension
of the paving operations. The curing method as herein specified does not preclude the use of any of the other com-
monly used methods of curing, and the OWNER may approve them if so requested by the CONTRACTOR. If any se-
lected method of curing does not afford the desired results, the owNER shall have the right to order that another
method of curing be instituted. Immediately after the finishing of the surface, the pavement shall be covered with a
continuous, uniform water-impermeable coating. The impermeable coating shall be of the type specified in Item
2.2.11. After removal of the side forms, the sides of the slab shall receive a like coating before earth is banked
against them. The solution shall be applied, under pressure with a spray nozzle, in such a manner as to cover the en-
tire surfaces thoroughly and completely with a uniform film.
The rate of application shall be such as to insure complete coverage and shall not exceed 200 squaze feet per
gallon of curing compound. When thoroughly dry, it shall provide a continuous and flexible membrane, free from
cracks or pinholes, and shall not disintegrate, check, peel or crack during the curing period. If for any reason the seal
is broken during the curing period, it shall be immediately repaired with additional sealing solution.
When tested in accordance with ASTM Designation C 156, the curing compound shall provide a film which shall
have retained within the test specimen the following percentages of the moisture present in the specimen when the
curing compound was applied.
212 JANUARY 1998
PAVEMENT AND SURFACES COURSES Item 5.8.2.
Time Retained Moisture (Min.)
After 24 hours 97%
After 3 da s 95%
After 7 da s 91%
~K
(j) Opening Pavement to Traffic. All traffic shall be excluded from the pavement for a period of not less than 14
days unless the OWNER directs that sections be opened to traffic at an eazlier date. On sections of the pavement
where the use of Type III cement is required or permitted, the pavement may be opened to traffic after 4 days.
Should tests of the beam specimens show a flexural strength of not less than 500 psi (3.44 MPa), the OWNER may
direct that the pavement so represented be opened to traffic in less than 14 days; and for Type III cement in less than
4 days. In all cases the pavement shall be cleaned and joints shall be filled and trimmed before being opened to traf-
fic.
(1) Traffic Access. When it is necessary to provide for traffic across the pavement, the CONTRACTOR shall, at his
own expense, construct suitable and substantial crossings over the concrete which shall be adequate for the traffic
using same.
(2) Time. Opening pavement to traffic shall not relieve the CONTRACTOR of responsibility for the work and shall
not in any way affect the time charge on the entire project. The number of days stated in the contract shall govern for
the completion of the entire work covered by the contract.
(k) Monolithic Curb. Concrete for monolithic curb shall be the same as for the pavement and, if carried back from
the paving mixer, shall be placed within 20 minutes after being mixed. Concrete may be placed from the separate
mixer if desired but in any case must be placed while the pavement concrete is still plastic. After the concrete has
been struck off and sufficiently set, the exposed surfaces shall be thoroughly worked with a wooden flat. The ex-
posed edges shall be rounded by the use of an edging tool to the radius indicated on the plans. When the concrete in
the curb has been sufficiently set, the inside form shall be carefully removed and the surface may be plastered with a
mortar consisting of one part of portland cement and two parts fine aggregate. The mortar shall be applied with a
template or "mule" made to conform to curb dimensions. All exposed surfaces of curb shall be brushed [o a smooth
and uniform surface.
(1) Superimposed Curb. When sawed joints are used, curbs shall be doweled as shown on the plans and poured after
sawing. Doweled curbs which are placed with an extrusion machine and the mixture shall conform to Item 5.8.2.(f).
(m) Slip Form Construction. At the option of the CONTRACTOR, and with the approval of the OWNER, concrete pave-
ment may be constructed by the use of slip form paving equipment.
Slip form paving equipment shall be provided with traveling side forms of sufficient dimensions, shape and
strength so as to support the concrete laterally for a sufficient length of time during placement to produce pavement
of the required cross section. The equipment shall spread, consolidate, screed and float-finish the freshly placed con-
crete in such a manner as to provide a dense and homogeneous pavement.
The concrete, for the full paving width, shall be effectively consolidated by internal vibration with transverse vi-
brating units or with a series of longitudinal vibrating units loaded with the specified thickness of pavement section
and at a minimum distance ahead of the screed equal to the pavement thickness.
When concrete is being placed adjacent to an existing pavement, that part of the equipment which is supported on
the existing pavement shall be equipped with protective pads on crawler tracks or rubber-tired wheels offset to run a
sufficient distance from the edge of the pavement to avoid breaking or cracking the pavement edge.
Final finishing for slip form pavement construction shall be to the tolerance as specified in Item 5.8.2.(h).
5.8.3. EdUIPMENT
(a) General. All equipment necessary for the construction of this item shall be on the project and shall be approvec
by the OWNER as to condition before the CONTRACTOR shall be permitted to begin construction operations on whict
the equipment is to be used.
(b) Field Laboratory. Afield laboratory structure shall be required only when specifically required and provided fog
in the special provisions.
JANUARY 1998 213
Item 5.8.3. PAVEMENT AND SURFACES COURSES
(c) Planer and Templates. A subgrade planer shall be furnished and shall be operated immediately ahead of the
paving operations. The planer shall be equipped with adjustable blades which shall trim the subgrade to the exact
section as shown on the plans. The planer shall be supported on wheels that travel on the side forms and shall be so
constructed that the wheels aze plainly visible during operations and must be heavy enough to remain on the forms at
all times. The frame shall be of such strength and rigidity that should the support of the planer be transferred from
the wheels to the center, there shall not be a deflection of more than '/8 in. (3 mm).
A template shall be provided having adjustable rods projecting downward at 1 ft. (30 cm) intervals. The bottom
of these rods shall be adjusted to the true cross section of the bottom of the slab when the template rests upon the side
forms. The template shall be of sufficient strength and rigidity that the deflection at the center shall be no greater
than'/8 in. (3 mm) should the support be transferred to that point.
Automatic subgrade trimmer may be used, if approved by OWNER, in lieu of above equipment.
(d) Mixer. Unless otherwise provided for or approved by the OWNER, the paving mixer shall be of a capacity of not
less than a 27-E paver, mixing rating to be established by the Mixer Manufacturers' Bureau of the Associated Gen-
eral Contractors of America. The paving mixer shall be provided with a broom and bucket for placing concrete or
with afull-width mechanical spreading or placing machine of approved design. The motor shall be provided with a
governor to regulate the speed of the mixer drum within a limit of 16 to 20 revolutions per minute. The mixer shall
be equipped with an automatic attachment for satisfactorily timing the mix and locking the discharging device so as
to prevent the discharging of the mixer until the materials have been mixed together for the minimum time required.
This attachment shall be operated independently of the drum and shall have a bell in operation at all times to indicate
the completion of the mixing time. The bell shall be such that it can be plainly heard at a distance of 50 ft. from the
mixer.
(1) Dual Drum Mixers. Dual drum mixers may be used, provided that their operations shall be properly syn-
chronized so as to permit a minimum mixing time of 50 seconds exclusive of the time required to transfer the materi-
als from the first to the second drum.
(2) Bucket. The distribution bucket shall be tightly constructed and of a sufficient capacity to hold an entire
batch of concrete. The discharge gate shall be so constructed so as to give a uniform distribution of the concrete on ~
the subgrade without segregation.
(3) Water Measuring Device. The paver shall be equipped with a water measuring device of sufficient accuracy
so that it shall measure the water within 1 percent of the amount required per batch. The measuring device shall be
so constructed that it shall be open to atmospheric pressure when the measured amount of water is in it and shall be
so placed and constructed that the measured amount of water required for a single batch of concrete can be dis-
charged into a calibrated tank or weighing device. The water measuring device shall be checked daily for accuracy.
(4) Alternate Mixer. When the use of a mixer of a capacity less than a 27-E paver is permitted, it shall be of an
approved type and so designed as to positively insure the uniform distribution of the materials throughout the mass
and to insure the dischazge of the batch without segregation.
(e) Forms. The side forms shall be metal, of approved cross section and bracing, of a height not less than the pre-
scribed edge thickness of the concrete section, and a minimum of 10 ft. (3 m) in length for each individual form.
Forms shall be of ample strength and shall be provided with adequate devices for secure setting so that when in place
they shall withstand the impact and vibration of equipment imposed thereupon without appreciable springing or set-
tlement. In no case shall the base width be less than 8 in. (20 cm) for a form 8 in. (20 cm) or more in height. The
forms shall be free from warps, bends or kinks and shall show no variation from the true plane for face or top. Each
10 ft. (3 m) length of forms shall be provided with at least 3 pins for securely staking in position. Sufficient forms
shall be provided for satisfactory prosecution of the work. Ten ft. (3 m) metal form sections shall be used in forming
curves with a 250 ft. (75 m), and larger radius. For curves with a radius of less than 250 ft. (75 m), acceptable flexi-
ble metal forms or wood forms may be used upon approval by the OWNER.
(f) Mechanical Vibratory Equipment. All concrete placed for pavement shall be consolidated by approved mechani-
cal vibrators operated ahead of the transverse finishing machine and designed to vibrate the concrete internally and/or
from the surface. Unless otherwise shown on the plans, vibrators of the surface-pan type shall be used for full-depth
placement. Both type vibrators shall be furnished and may be used concurrently at the discretion of the OWNER. Vi-
bratory members shall extend across the pavement practically to, but shall not come in contact with, the side forms.
214 JANUARY 1998
PAVEMENT AND SURFACES COURSES Item 5.8.3.
Mechanically-operated vibrators shall be mounted in such a manner as not to interfere with the transverse or longitu-
dinal joints.
The internal-type vibrators shall be spaced at not more than 24 in. and shall be equipped with synchronized vi-
bratory units. Separate Vibratory units shall be spaced at sufficiently close intervals to provide uniform vibration and
consolidation to the entire width of the pavement. The frequency in air of the internal spud-type Vibratory units shall
be not less than 8,000 cycles per minute and not less than 5,000 cycles per minute for tube types. The method of op-
eration shall be as directed by the OWNER. The CONTRACTOR shall have a satisfactory tachometer available for
checking the vibratory elements.
The pavement vibrators shall not be used to level or spread the concrete but shall be used only for purposes of
consolidation. The vibrators shall not be operated where the surface of the concrete, as spread, is below the elevation
of the finished surface of the pavement, except for the first lift of concrete where the double strike-off method of
placement is employed. The vibrators shall not be operated for more than 15 seconds while the machine upon which
they aze installed is still.
The pan-type vibrator units shall apply the vibrating impulses directly to the surface of the concrete. The oper-
ating frequency shall not be less than 3,500 cycles nor more than 4,200 cycles per minute in air. The CONTRACTOR
shall have a satisfactory tachometer available for checking the speed of the vibratory elements.
Approved hand manipulated mechanical vibrators shall be furnished in the number required for provision of
proper consolidation of the concrete along the forms, at joints and in areas not covered by mechanically controlled
vibrators. These vibrators shall be sufficiently rigid to insure control of the operating position of the vibrating head.
Complete and satisfactory consolidation of the concrete pavement is a most important requirement of this speci-
fication. Cores taken as required by Item 5.8.6. shall be cazefully examined for voids, honeycombing or other evi-
dence of incomplete consolidation. If such evidence is present, changes in the consolidation procedures and/or
equipment shall be made to insure satisfactory consolidation.
(g) Vibrating Screed. The mechanically vibrated screed shall be provided with a template adjusted to the crown of
the concrete section. The template shall be power vibrated, adjustable in height and mounted to ride on the forms.
The mechanical vibration of one of the screeds on the transverse finishing machine specified in paragraph (h), "The
Transverse Finishing Machine," shall be acceptable.
(h) Transverse Finishing Machine. The transverse finishing machine shall be provided with two screeds accurately
adjusted to the crown of the pavement, shall be power driven and mounted in a substantial frame equipped to ride on
the forms. The machine shall be so designed and operated as to strike off and consolidate the concrete.
Finishing machines shall be maintained in a tight and good operating condition, accurately adjusted to the re-
quired crown or profile and free from deflection, wobble or vibration tending to affect the surface finish. Machines
failing to meet these requirements shall be rejected by the OWNER, and the CONTRACTOR shall provide approved
equipment.
(i) Miscellaneous Finishing Equipment. The CONTRACTOR shall furnish a broom of the push broom type not less
than 18 in. (45 cm) in width with stiff bristles for the final surface finish of concrete base or as the OWNER directs.
The CONTRACTOR shall fumish a sufficient number of bridges equipped to ride on the forms and span the pave-
ment for finishing operations and for the installation and finishing of joints. The CONTRACTOR shall furnish, operate
and maintain at least two standard 10 ft. (3 m) steel straightedges and all necessary finishing and edging tools as may
be required to complete the pavement in accordance with the plans and specifications.
5.8.4. ALLEY PAVING
Alley paving shall be constructed in accordance with the specifications for street paving hereinbefore described, in
accordance with the details shown on the plans, and with the following additional provisions:
Alley paving shall be constructed to one of the typical cross sections shown on the plans.
Transverse expansion joints of the type shown on the plans shall be constructed at the property line on each end
of the alley with a maximum spacing of 600 ft. (180 m). Transverse contraction and dummy joints shall be placed at
the spacing shown on the plans. Contraction and dummy joints shall be formed in such a manner that the required
joints shall be produced to the satisfaction of the OwIVER. All joints shall be filled with top seal in accordance with
the requirements of Item 5.8.2.(e), "Joints."
JANUARY 1998 215