HomeMy WebLinkAboutOrdinances (O-85-557)-03/05/1985
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ORDINANCE NO.
O-H~-~~7
3 AN ORDINANCE AMENDING SECTION 8 OF CHAPTER 9 OF THE COLLEYVILLE
CODE BY MODIFYING THE SPECIFICATIONS TO WHICH STREETS, CURBS AND
4 GUTTERS MUST BE CONSTRUCTED.
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WHEREAS, the City Council of the City of Colleyvi11e is of the
opinion that the current street construction
specifications should be modified, and
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WHEREAS, the City Council is of the opinion that the following
7 adopted street specifications are in the best interest
of the citizens of the City of Co11eyvil1e and the
8 public in general; NOW, THEREFORE,
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BE IT ORDAINED BY THE CITY COUNCIL OF THE CITY OF COLLEYVILLE,
TEXAS:
Sec. 1.
That Part B of Section 8 of Chapter 9 of the
Colleyville Code be amended to read as follows:
"B. STREET SPECIFICATIONS
Streets of the various types shall be constructed or
reconstructed using either hot-mixed asphaltic
concrete pavement sections or reinforced portland
cement concrete pavement sections in accordance with
the following specifications:
(I) Hot-Mixed Asphaltic Concrete Pavement Sections
(a) Type I (Cul-de-sac, dead-end, etc.) and
Type II (Basic subdivision street)
(i) Eight inches (8") thick (minimum)
stabilized subgrade, six inches (6")
past the back of curb line.
(ii) Prime (or cure) coat.
(iii)
Five inches (5") Type "An or "Bn hot
mixed asphaltic concrete placed in two
(2) lifts. The bottom lift shall extend
six inches (6") past the back of curb
line.
(iv)
Two inches (2") Type "D" hot mixed
asphaltic concrete placed in one (I)
lift.
(b) Type III (County roads, shopping centers,
condominums, heavy-use subdivision routes and
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Ordinance 0-85-557
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collectors)
(i) Eight inches (8") thick (minimum)
stabilized subgrade, six inches (6")
past the back of curb line.
(ii) Prime (or cure) coat.
(iii) Six and one-half inches (6 1/2") Type
"A" or "B" hot mixed asphaltic concrete
placed in three (3) lifts. The bottom
lift shall extend six inches (6") past
the back of curb line.
(iv) Two inches (2") Type "D" hot mixed
aspah1tic contrete placed in one (1)
lift.
(c) Type IV (Thoroughfares and Heavy industry
traffic routes)
(i) Eight inches (8") thick (minimum)
stabilized subgrade, six inches 6" past
the back of curb line.
(ii) Prime (or cure) coat.
(iii) Eight inches (811) Type "A" or "B" hot
mixed asphaltic concrete placed in four
(4) lifts. The bottom two lifts shall
extend six inches (6") past the back of
curb line.
(iv)
Two inches (2") Type "D" hot mixed
asphaltic concrete placed in one (1)
lift.
(d) Stabilized Subgrade for Hot-mixed
Aspha1atic Concrete Pavements
The basic design of the asphaltic pavement
sections for streets and roads ,assumes
average subgrade conditions which in all
cases shall be stabilized to not less than
the thickness shown herein with lime or
cement at a rate determined by an independent
testing lab based on lab tests from the
actual site. Classification of the subgrade
for evaluating the supporting qualities
shall generally apply to the top 12" layer
of soil measured down from subgrade surface.
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Ordinance 0-85-557
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Where combinations of conditions indicate
special problems such as springs or seepage,
drastic material changes from point to point,
etc. that reduce the existing subgrade below
average, appropriate remedies designed by a
Registered Professional Engineer based upon
actual on-site observations and tests shall
be included to correct the particular
condition involved. In all cases, the
requirements set forth in this criteria are
minimum and the City reserves the right to
require further additional testing (such as
California Bearing Ratio), precautions or
treatments consistent with sound engineering
practice when necessary to provide for other
conditions not specifically covered by this
criteria.
(2) Reinforced Portland Cement
Concrete Pavement Sections
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(a) Type I (Cul-de-sac, dead-end, etc.) and
Type II (Basic subdivision street)
(i) Six inch (6") thick stabilized subgrade,
six inches (6") past the back of curb
line.
(ii) Prime (or cure) coat.
(iii) Five inch (5") thick portland cement
concrete, reinforced with No. 3
reinforcing bar having a spacing of 24
inches center to center both ways.
(b)Type III (County roads, shopping centers,
condominiums, heavy-use subdivision routes
and collectors)
(i) Six inch (6") thick stabilized subgrade,
six inches (6") past the back of curb
line.
(ii) Prime (or cure) coat.
(iii) Six inch (6") thick portland cement
concrete, reinforced with No. 4
reinforcing bars; longitudinal bars
having a twenty-four inch (24") center
to center spacing and transverse bars
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I Ordinance 0-85-557
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having a twenty-two (22") center to
center spacing.
(c) !ype IV (Thoroughfares and heavy
industry traffic routes)
(i) Six inch (6") thick stabilized subgrade,
six inches (6") past the back of curb
line.
(ii) Prime (or cure) coat.
(iii) Seven inch (7") thick portland cement
concrete, reinforced with No. 4
reinforcing bars; longitudinal bars
having a twenty-four inch (24") center
to center spacing and transverse bars
having a twenty inch (20") center to
center spacing.
(d) The basic design of reinforced concrete
pavement sections for streets and roads
assumes poor subgrade conditions which
shall be stabilized with lime or cement
at a rate determined by an independent
testing lab, unless and until the developer
furnishes actual test data and pereformance
recommendations prepared by an independent
testing lab sufficient, in the opinion of the
City, to show that the subgrade is of a
quality which does not require stabilization.
Such data shall include, but is not
necessarily limited to: Liquid Limit,
Plasticity Index and Percent Passing No. 200
Sieve. Classification of the subgrade for
evaluating the supporting qualities shall
generally apply to the top 12" layer of soil
measured down from subgrade surface. Where
other conditions apart from the physical
properties indicate a special problem such as
springs or seeepages, drastic material
changes from point to point, etc.,
appropriate remedies designed by a Registered
Professional Engineer shall be included to
correct the particular condition involved.
In all cases, the requirements set forth in
this criteria are minimum and the City
reserves the right to require further
additional testing (such as California
Bearing Ratio), precautions or treatments
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Ordinance 0-85-557
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consistent with sound engineering practice
when necessary to provide for other
conditions not specifically covered by this
criteria."
That Part C of Section 8 of Chapter 9 of the
Co11eyvil1e Code be amended to read as follows:
"c. CURB AND GUTTER SPECIFICATIONS
All streets shall be provided with reinforced portland
cement concrete curbs and gutters in accordance with
the following specifications:
(1) Curbs and gutters shall have the following
dimensions:
(a) Curb rolls shall be six inches (6") wide and
not less then six inches (6") high nor more
than seven inches (7") high.
(b) Curb and gutter bases shall not be less than
twenty-four inches (24") wide and provide a
minimum gutter width of eighteen inches (18").
(c) Gutter depths for hot-mixed asphaltic
concrete pavement shall be five inches (5")
for Types I and II streets and six inches
(6") for Types III and IV streets. Gutter
depths for reinforced portland cement
concrete pavement shall be the same as the
pavement thickness.
(2) Reinforcement shall be provided by three (3)
number four (4) stell reinforcing bars by placing
one (1) bar in the curb roll and two (2) bars in
the curb and gutter base. This reinforcement is
in addition to reinforcement in Portland cement
concrete pavements.
(3) Concrete for curbs and gutters shall be Class "A"
and consist of five (5) sacks (minimum) of
portland cement for each cubic yard of concrete
mix and have a seven (7) day flexural strength of
five hundred (500) pounds per square inch and a
twenty-eight (28) day compressive strength of
three thousand (3000) pounds per square inch.
(4) Curb and gutter for hot-mixed asphaltic concrete
pavements shall be placed on the first two inch
(2") lift of asphaltic paving. For reinforced
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Ordinance 0-85-557
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Sec. 3.
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portland cement concrete pavements, the curb and
gutter base shall be placed monolithlica11y with
the pavement. The curb roll shall be placed
mono1ithically with the pavement or added
separately. Curb rolls added separately shall be
provided with numbr three (3) reinforcing bar
stirrups spaced twenty-four inches (24") center to
center which extend to within one and one-half
inches (1 1/2") of the bottom of the pavement.
(5) All driveway entrances constructed in existing
curb and gutters shall be saw-cut a minimum of
three feet (3') on both sides of the driveway.
After work is completed the street sidewalk shall
be repaired and it shall be the responsibility of
the party installing the driveway."
That Part H of Section 8 of Chapter 9 of the
Co11eyville Code be amended to read as follows:
"H. TEXAS DEPT. OF HIGHWAYS SPECIFICATIONS
All specifications not specifically provided for
elsewhere in this chapter are referenced to the
Texas State Dept. of Highways 1982 Standard
Specifications.
(1) Item 260 Lime Treated Subgrade
Lime used shall be Type A hydrated lime. The
placement and construction of the subgrade shall
be done in accordance with the applicable
requirements described in Item 260 of the Texas
State Dept. of Highways Standard Specifications.
(2) Item 270 Cement Treated Subgrade
Cement used shall be Type 1 portland cement. The
placement and construction of cement treated
subgrade shall be done in accordance with the
applicable requirements described in Item 270 of
the Texas State Dept. of Highways Standard
Specifications. An asphaltic membrane of RC-250
asphalt shall be applied as a cure coat.
(3) Item 310 Prime Coat
Asphalt material for prime coat shall be either
MC-30 or EA-HVMS. The placement of prime coat
shall be described in Item 310 of the Texas State
Dept. of Highways Standard Specifications. Prime
coat shall be placed on all lime treated subgrade
at a rate of not less than 0.15 nor more than 0.25
ga1/sq.yd.
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Ordinance 0-85-557
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Sec. 4.
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(4) Item 340 Hot-mixed Asphaltic Concrete Pavement
The composition and placement of hot-mixed
asphaltic concrete pavement shall be in accordance
with the applicable requirements of Item 340 of
the Texas State Dept. of Highways Standard
Specifications. The asphalt for paving mixture
shall be AC-20 forming from 4.5 to 6.0 percent of
the mixture by weight. The asphalt for use as a
tack coat under Item 340 shall be either RC-2 or
EA-HVRS."
That Part I of Section 8 of Chapter 9 of the
Co1leyvi11e Code be amended to read as follows:
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"I. CONCRETE FOR PAVEMENTS
Concrete for pavements shall be Class "A" and consist
of five (5) sacks (minimum) of Portland cement for each
cubic yard of concrete mix and have a seven (7) day
flexural strength of five hundred (500) pounds per
square inch and a twenty-eight (28) day compressive
strength of three thousand (3000) pounds per square
inch. Composition and placement of reinforced concrete
pavements shall be in accordance with the applicable
requirements of Item 364 of the Texas State Dept. of
Highways Standard Specifications. Coarse aggregate
shall be either Number 2 or 3. Cement for the mixture
shall be Type I Portland cement."
Sec. 5.
Tha t Part K (2) of Section 8 of Chapter 9 of the
Colleyville Code be deleted in its entirety.
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AND IT IS SO ORDERED.
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The f~st reading(~nit~~~~ hearing being conducted on the
S-f-lr( day of Xt.~ ' 1985.
The s~ond readin~Ja9d public hearing being conducted on the
/ (j+At day of 3:..'i:..li!:fdJ.n hAf-- ' 19 8 5 .
T~hird reading ~~~~pub~~ hearing being conducted on the
day of ~~&: , 1985.
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Ordinance 0-85-557
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Approved as to Form and Legality:
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CITY OF COLLEYVILLE
BY:&'~~
Mayor
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