ST9601-SY 961204SCHEMATIC DESIGN
Wrangler Drive Paving, Drainage and Water Line
Improvements
(Freeport Parkway to Belt Line Road)
Prepared For:
CITY OF COPPELL
Engineering Department
Prepared By:
TEAGUE NALL AND PERKINS, INC.
2001 W. Irving Blvd.
Irving, Texas 75061
December, 1996
TEAGUE NALL AND PERKINS, INC.
SCHEMATIC DESIGN REPORT
Wrangler Drive Paving, Drainage and Water Line
Improvements
(Freeport Parkway to Belt Line Road)
Prepared For:
CITY OF COPPELL
Engineering Department
Prepared By:
TEAGUE NALL AND PERKINS, INC.
2001 W. Irving Blvd.
Irving, Texas 75061
December, 1996
TEAGUE NALL AND PERKINS, INC.
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TABLE OF CONTENTS
I. INTRODUCTION ........................................... 2
II. SCOPE OF PROJECT ........................................ 2
III.
EXISTING CONDITIONS
A,
B.
C.
D.
E.
Right-of-Way ......................................... 3
Development .......................................... 4
Drainage ............................................ 4
Roadway/Pavement Section and Other Roadway Improvements ......... 5
Utilities ............................................. 5
IV.
PROPOSED IMPROVEMENTS
Ae
B.
C.
D.
E.
F.
G.
Roadway Section/Geometrics ............................... 5
Drainage ............................................ 6
Signalization .......................................... 6
Street Lighting ......................................... 7
Water Line Improvements ................................. 7
Utility Conflicts/Adjustments ............................... 7
Left-Turn Channelization .................................. 8
Ve
OTHER ISSUES/CONSIDERATIONS ............................. 8
APPENDIX
Ae
B.
C.
D.
E.
Sample Cover Sheet
Drainage Area Map
Preliminary Drainage Calculations
Intersection Channelization - Option A
Intersection Channelization - Option B
TEAGUE NALL AND PERKINS, INC.
SCHEMATIC DESIGN REPORT
ON
WRANGLER DRIVE PAVING, DRAINAGE & WATER LINE
IMPROVEMENTS
(Freeport Parkway to Belt Line Road)
I. INTRODUCTION
II.
Teague Nall and Perkins, Inc. (TNP) Consulting Engineers is privileged to have been
chosen as the engineering consultant for the design of the Wrangler Drive project.
Wrangler Drive functions as a collector street through a rapidly developing industrial area
in the City of Coppell. It also is the primary access for the Coppell Middle School and
serves as the origination point for the CISD bus fleet routes· The proposed improvements
and ultimate extension of Wrangler Drive to Freeport Parkway will provide improved
access and safety for all citizens and business customers traveling to and from this
location within the City.
Although the schematic plans and report for this project are generally conceptual in
nature, it is the intent for these documents to highlight the various design issues that must
be addressed in the preparation of final plans, as well as to establish the basis for
decisions regarding the design of the specific improvements for this project. These issues
and decisions will ultimately be interwoven to provide a final product which will improve
the quality of life for the citizens of Coppell and satisfy the public health, safety and
welfare needs of the community in an economic manner.
SCOPE OF PROJECT
The project scope consists of the following improvements:
Construction of approximately 4300 lineal feet of new and existing roadway,
consisting of an eight (8) inch lime stabilized subgrade and seven (7) inches of
reinforced concrete pavement with concrete curbs (45-feet back/curb to back/curb)
from Freeport Parkway to Belt Line Road. Plans for this roadway work will be
prepared so that it may be constructed in two (2) separate phases, if desired.
Phase A -
From the northwest comer of the CISD project (Coppell Middle
School), east to Belt Line Road; and
Phase B -
From Freeport Parkway, east to the northwest comer of the CISD
property (Coppell Middle School)
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Ill.
,
Acquisition of right-of-way (62.5 - 65.0 feet of width) from Freeport Parkway to
the west end of the existing right-of-way at the northwest comer of the CISD
property.
Construction of a twelve (12) inch water line extension from the existing main in
Freeport Parkway to the end of the existing water main near the northwest comer
of the CISD property.
Construction of underground longitudinal drainage improvements along Wrangler
Drive. Provisions for the collection of runoff from offsite drainage areas beyond
the right-of-way will also be constructed for future extension by others, as new
development occurs.
Construction of traffic channelization improvements for left-turn lanes on
Wrangler Drive, at the intersection of Wrangler Drive with Freeport Parkway and
Belt Line Road, using pavement striping and/or traffic buttons. Construction of
traffic channelization will also be considered adjacent to the Coppell Middle
School (CMS) campus to facilitate left turn movements for west-bound traffic on
Wrangler Drive turning into the existing CMS parking lot and driveways.
Installation of conduit across Wrangler Drive at Freeport Parkway for future
traffic signalization at that location.
Installation of conduit along Wrangler Drive for future street lighting
improvements, by others, based upon coordination with TU Electric.
EXISTING CONDITIONS
A. Right-of-Way
The basic right-of-way for Wrangler Drive is sixty (60) feet in width, however,
as adjacent properties have been replatted and developed an additional five (5) feet
has been acquired along portions of the north and south fight-of-way lines. The
existing right-of-way width, therefore, varies throughout the length of the project
from a minimum of sixty-five (65) feet to a maximum of seventy (70) feet.
Currently the existing right-of-way dedication ends at the northwest comer of the
CISD property. The proposed extension of Wrangler Drive to Freeport Parkway
will, therefore, require the acquisition of fight-of-way across the undeveloped tract
of land west of the Coppell Middle School. Although the subject right-of-way
acquisition is planned as a sixty-five (65) foot wide strip of land, there will be a
short segment of right-of-way with a width of only sixty-two (62) feet from the
northwest comer of the CISD property and the southwest comer of Lot 3R, Block
TEAGUE NALL AND PERKINS, INC.
8, Park West Commerce Center (approx. 262 feet), unless additional right-of-way
is also acquired from Lot 3R.
Development
Development is occurring along Wrangler Drive at a rapid pace, as evidenced by
the recent construction on the northwest and northeast comers of Executive Drive
at Wrangler Drive, and the current proposal for development on the tracts along
the north and south sides of Wrangler Drive at Belt Line Road. Currently only
approximately thirty (30) percent of the adjacent property with frontage along
Wrangler Drive, between Freeport Parkway and Belt Line Road, has been
developed. The rapid rate of development will require close cooperation and
communication among all involved parties as the design and construction of the
Wrangler Drive improvements proceeds, in order to insure that designs for
various projects are coordinated.
Drainage
Existing drainage along the roadway is generally poor. To the west of Enterprise
Drive, the roadway drains west towards Freeport Parkway. East of Enterprise
Drive the drainage pattern is to the east towards Belt Line Road. Runoff is
currently collected and conveyed in open drainage systems along the north and
south sides of the roadway. The existing drainage systems consists of shallow
barrow ditches with pipe culverts under driveways and side street intersections.
Drainage is especially poor along the south side of Wrangler Drive on the CISD
property and along both the north and south sides of Wrangler Drive between
Lakeside Drive and Belt Line Road. The poor drainage in these areas is primarily
due to extremely flat grades along the roadway resulting in standing water in the
roadside ditches, or in the case of the CISD property, on the paved/gravel parking
areas.
The recent construction of enclosed underground improvements and an open
drainage channel north of Wrangler Drive, from Executive Drive to Belt Line
Road, has significantly reduced the mount of runoff collected in the north
roadside ditch to the east of Executive Drive.
Improved drainage systems in Belt Line Road and Freeport Parkway have been
designed to accommodate the majority of rimoff from Wrangler Drive under fully
developed conditions. Extensions of these two (2) systems will be required as part
of the Wrangler Drive improvement project.
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TEAGUE NALL AND PERKINS, INC.
IV.
D. Roadway/Pavement Section and Other Roadway Improvements
The existing roadway is a typical rural road section consisting of a thin layer of
asphalt and/or asphalt/aggregate surface treatment over a flexible base or
compacted subgrade. No curb or gutter improvements have been constructed
along Wrangler Drive itself and drainage is handled in open roadside ditches as
mentioned previously. There are several areas where base and pavement failures
are evident.
Other existing improvements along Wrangler Drive include traffic signalization
at the Belt Line Road intersection and a minimal amount of street lighting.
E. Utilities
All utility companies were contacted prior to completing field surveys and were
asked to mark their existing facilities along Wrangler Drive on-the-ground and/or
provide accurate information on the location of their lines/facilities. The various
utilities are reflected on the schematic plans to the extent information or field
locates were provided. The most significant utilities, (i.e. those which have the
most potential for costly adjustments) are:
1. The 10-inch high pressure gas line north of Wrangler Drive, from
Freeport Parkway to Belt Line Road; and
2. The fiber optics cable along the north side of the existing roadway.
Other utilities include the existing water line along the south side of the roadway
and the existing sanitary sewer along portions of the north side.
PROPOSED IMPROVEMENTS
A. Roadway Section/Geometrics
The proposed roadway section is a forty-five (45) foot (b/c-b/c), seven (7) inch
reinforced concrete pavement with six (6) inch curbs on an eight (8) inch lime
stabilized subgrade. The roadway crown will be six (6) inches and parkway
slopes will generally be graded to fall towards the curbs at approximately two (2)
percent grade. We recommend that the City retain the services of a geoteehnieal
testing firm to analyze the existing soil and provide a recommendation on the
specific rate of lime required for stabilization of the subgrade. This could be done
after construction has begun and the subgrade is cut to grade.
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TEAGUE NALL AND PERKINS, INC.
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Curb returns at street intersections will be designed and constructed as 30-foot
radii, unless otherwise noted. (See additional discussion concerning the proposed
curb returns at Freeport Parkway and Crestside Drive under Section V of this
report.) The alignment for Wrangler Drive is generally centered within the
original sixty (60) feet of right-of-way. As the alignment proceeds west from
Freeport Parkway, the centerline of the roadway curves to the northeast along a
600-foot curve. Both ends of Wrangler Drive are centered on the existing median
openings at Belt Line Road and Freeport Parkway.
(See Schematic Plans for specific alignment and geometric details).
Drainage
Enclosed drainage system improvements (extensions) are proposed from existing
systems at both ends of the project in Freeport Parkway and Belt Line Road.
These existing systems appear to have the capacity required for the improvement
of the drainage along Wrangler Drive in accordance with the City's design
criteria, using rainfall intensities from HYDRO 35. Proposed drainage
improvements will be sized for the conveyance of the anticipated runoff from a
100-year frequency storm event, to the extent additional capacity beyond the
available drainage capacity of the roadway itself is required.
Grades for the proposed extension from the Belt Line Road system on the east end
of the project are flat and the proposed system is relatively shallow due to the
depth of the existing 6'x3' MBC at the Belt Line Road/Wrangler Road
intersection. In addition to the proposed extension of the most southern 6' x 3'
box culvert west along Wrangler Drive from Belt Line Road, the remaining 2-
6'x3' RCBC's will be turned and extended to the northwest for the future
collection of runoff from Drainage Area 'C' (See Appendix for Drainage Area
Map and Preliminary Drainage Calculations).
The proposed drainage system extension from Freeport Parkway, on the other
hand, is very deep in order to connect to the existing 60-inch RCP stub-out and
to maintain clearance for the construction of a future sanitary sewer service from
the south side of Wrangler Drive to a portion of the tract at the northwest corner
of Wrangler Drive and Enterprise Drive.
(See Schematic Plans for additional information on proposed inlet locations and
overall system layout).
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TEAGUE NALL AND PERKINS, INC.
C. Signalization
De
Fe
No traffic signalization improvements are included in the project at this time.
However, conduit will be installed across Wrangler Drive at the intersection of
Freeport Parkway for possible future traffic signalization improvements at that
intersection.
Street Lighting
Although the design/construction of street lighting is not specifically included in
the scope of work contemplated for this project, coordination with TU Electric
representatives will be performed in order to establish the locations for any
required conduit runs under the proposed pavement.
Water Line Improvements
A twelve (12) inch water line extension is proposed ~'om the existing main along the
east side of Freeport Parkway to the end of the recently constructed water line at the
northwest comer of the CISD property. The existing water line stub-out at the main
in Freeport Parkway is located to the north of the proposed right-of-way for
Wrangler Drive. The connection of the proposed main will, therefore, require the
acquisition of a utility easement at the noaheast comer of Freeport Parkway and
Wrangler Drive or the construction of a new tap on the existing water main within
the limits of the proposed Wrangler Drive right-of-way. We recommend utilizing
the existing tap, if at all possible.
The alignment for the proposed water line improvements as shown on the schematic
plans generally follows along the noah side of the proposed Wrangler Drive
roadway extension for approximately 450 feet before crossing over to the south side
and connecting to the existing main at the northwest comer of the CISD property.
The location of the cross-over was selected in order to avoid potential conflicts with
the proposed storm drain at the southwest comer of Lot 3R, Block 8, Park West
Commerce Center where the proposed right-of-way narrows. Fire hydrants have
been located at approximately 300-foot spacing along the proposed water line.
Utility Conflicts/Adjustments
Existing utilities are reflected as accurately as possible on the schematic plans based
upon field survey ties or other information provided by the utility owners. The most
probable conflict with existing tmdergronnd utilities involves the existing fiber
optics cable and high pressure gas line along the north side of the roadway. With the
City's concurrence of the basic schematic design, we will be submitting copies of
the schematic plans to all utility owners and requesting additional information
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TEAGUE NALL AND PERKINS, INC.
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related to the vertical location of their facilities in critical areas where the potential
for conflict exists. In some areas we will be coordinating with the utility owners to
have their facilities uncovered and tied to our survey information. Using this
information, we will attempt to design the proposed improvements to avoid conflicts
where possible.
Left-Turn Channelization
Traffic channelization for a left-tum lane on Wrangler Drive is proposed at the
intersection with Freeport Parkway and Belt Line Road. Options for this
channelization are shown in the Appendix at the end of this report. The
channelization can be accomplished using raised pavement markings or pavement
striping. We recommend using raised pavement markings for greater visibility.
Additional traffic channelization may be provided along the Coppell Middle School
frontage, pending discussions with the CISD.
Ve
OTHER ISSUES/CONSIDERATIONS
There are several additional issues which should be noted and addressed prior to proceeding
with the preliminary design. The following is a brief description of those issues which have
been identified to date:
Curb Return Radius at Freeport Parkway - The construction of a 40-foot radius at
Freeport Parkway conflicts with the existing curb inlet to the south of the proposed
intersection. A 30-foot radius, however, appears to work okay. We recommend
constructing a 40-foot radius on the north side of this intersection and a 30-foot
radius on the south side to avoid removing and reconstructing the existing inlet.
Construction of Drop Inlets for Offsite Drainage Areas - The schematic plans reflect
the construction of drop inlets or 'Y' inlets in areas where future storm drain
extensions will be required to collect runoff from offsite drainage areas. We
recommend construction of these inlets rather than simply plugging the proposed
pipe stub-outs. However, this recommended construction does require the
acquisition of additional drainage easements.
Future Sanitary Sewer Extension from Freeport Parkway - It appears that sanitary
sewer service to Lot 3R, Block 8, Park West Commerce center may require the
extension of the sanitary sewer along the southside of Wrangler drive from the
existing stub-out at Freeport Parkway. The future alignment of this sanitary sewer
extension will need to cross to the north side of Wrangler Drive near the southwest
comer of Lot 3R. If these sanitary sewer improvements are installed after the
TEAGUE NALL AND PERKINS, INC.
construction of Wrangler Drive, the crossing of Wrangler Drive will need to be
open-cut or bored. Due to the grade of the existing sanitary sewer and storm drain
stub-outs at Freeport Parkway, and the proposed grades along the proposed
Wrangler Drive extension, both the proposed water line and the future sanitary
sewer in Wrangler Drive will cross over the top of the proposed storm drain. This
situation allows for only a minimum vertical clearance between these three (3)
improvements. Rather than open-cut the new pavement in the future, we
recommend that the City consider constructing these sanitary sewer improvements
in conjunction with the proposed project.
Access to Coppell Middle School Parking Lot - Access to the existing school
parking lot is currently uncontrolled across its entire frontage with Wrangler Drive.
The schematic plans reflect limiting access to two (2) controlled driveway
approaches at the west and east ends of the parking lot. Discussions regarding this
and other access points for the CISD property need to be held with CISD. Options
for the parking lot layout could be developed to assist CISD in visualizing the
impact of the proposed access, if desired.
Curb Return Radius at Crestside Drive - The existing site layout of the business park
at the southwest comer of Wrangler Drive and Crestside Drive prevents the
construction of a 30-foot radius on the southwest curb retum. We are
recommending the layout as shown on the schematic plans, which reflects a 20-foot
radius on the southwest curb retum connecting with a 5-foot driveway radius, to
line-up with the existing parking lot curb line for the business park.
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TEAGUE NALL AND PERKINS, INC.
APPENDIX
TEAGUE NALL AND PERKINS, INC.
A
B
C
WRANGLER DRIVE
PRELIMINARY DRAINAGE AREA CALCULATIONS
December, 1996
AREA NO. acres min. in/hr cfs cfs
A1 1.2 0.9 10 8.9 9.6 9.6
A2a 1.2 0.9 10 8.9 9.6 19.2
A2b 1.2 0.9 10 8.9 9.6 28.8
A3 0.7 0.9 10 8.9 5.6 34.4
A4a 1 0.9 10 8.9 8.0 42.4
A4b 5.8 0.9 10 8.9 46.5 88.9
A5 1.2 0.9 10 8.9 9.6 98.5
A6 0.8 0.9 10 8.9 6.4 104.9
A7 1.3 0.9 10 8.9 10.4 115.3
A8 0.8 0.9 10 8.9 6.4 121.7
A9 1.3 0.9 10 8.9 10.4 132.2
A10 0.8 0.9 10 8.9 6.4 138.6
C 24.8 0.9 10 8.9 198.6 198.6
D 11.9 0.9 10 8.9 95.3 95.3
Bla 0.8 0.9 10 8.9 6.4 6.4
Blb 9.3 0.9 10 8.9 74.5 80.9
B2a 1.4 0.9 10 8.9 11.2 92.1
B2b 1.9 0.9 10 8.9 15.2 107.3
B3a 0.9 0.9 10 8.9 7.2 114.5
B3b 1.1 0.9 10 8.9 8.8 123.4
B4a 1.5 0.9 10 8.9 12.0 135.4
B4b 3.6 0.9 10 8.9 28.8 164.2
B5 1.4 0.9 10 8.9 11.2 175.4
B6a 1.5 0.9 10 8.9 12.0 187.4
B6b 1.2 0.9 10 8.9 9.6 197.0
NOTE:
1. Design Flow for existing 3 - 6' x 3' MBC at Belt Line RoadNVranger Drive intersection = 344 cfs
2. Design Flow for existing 60" RCP at Freeport Parkway/Wrangler Drive intersection = 237 cfs
3. Rainfall intensities based upon HYDRO - 35
REMARKS
To Proposed System in Wrangler Drive
To Proposed System in WranBler Drive
To Proposed System in Wrangler Ddve
To Proposed System in Wrangler Drive
To Proposed System in Wrangler Drive
To Proposed System in Wrangler Drive
To Proposed System in Wrangler Ddve
To Proposed System in Wrangler Ddve
To Proposed System in Wranqler Ddve
To Proposed System in Wrangler Drive
To Proposed System in Wrangler Ddve
To Proposed System in Wrangter Drive
To Prop. 2-6'x3' RCBC Stub Out to the north at Belt Line Rd.
To Existing Airline Rd. & Beltline Rd. Systems
To Proposed System in Wrangler Drive
To Proposed System in Wran~ller Drive
To Proposed System in Wrangler Drive
To Proposed System in Wrangler Drive
To Proposed System in Wrangler Drive
To Proposed System in Wrangler Drive
To Proposed System in Wran~ller Ddve
To Proposed System in Wrangler Drive
To Proposed System in Wrangler Ddve
To Proposed System in Wran~ller Drive
To Proposed System in Wran~ller Drive
D
BEL FLINE RD. / FREEPORT PKWY.
I&50' 11'
~ 250' MIN.
R-50O' MIN..~/./~-R-
IN TERSEC 770N
CHA NNELIZA T/ON- OP T/ON
'A '
I
E
BEL TLINE RD. / FREEPORT PKWY.
78.50' ~T' 7~.~'
R-500' IdllN...--/
IN TERSEC TION
CHANNEL IZA T/ON- OP T/ON