ST9902-CS030205
PROJECT SCOPE ITEMS
SANDY LAKE – FREEPORT PARKWAY TO DENTON TAP
ST 99-02B
PAVEMENT AND ALIGNMENT TOPICS
PAVEMENT SECTION
PAVING DESIGN CRITERIA City of Coppell Construction Design Standards & North
Central Texas Council of Governments Standard Specifications for Public Works
Construction
ROW WIDTH:
Existing: Varies from 55’ to 120’
Proposed: 90’ minimum
PAVEMENT WIDTH:
Existing: 24’
Proposed: 2 – 27’ back to back
No. of lanes proposed: 4 lanes
PARKWAY:
Proposed Width: Varies – 10’ minimum
Proposed Sidewalk Width: Sidewalks are 5’ & hike and bike trail is 10’
Parkway cross fall slope maximum: 3”/ft.
GRADE REQUIREMENTS:
Is TC below adjacent ground criteria to be followed? No
Any deep cuts, high fills? Yes
PAVEMENT CROSS FALL:
PROPOSED: ¼”/ft.
MINIMUM: ¼”/ft.
MAXIMUM: ¼”/ft.
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PROJECT SCOPE ITEMS
Sandy Lake – Freeport Pkwy To Denton Tap (ST 99-02B)
VERTICAL GRADE:
MINIMUM: 0.5%
MAXIMUM: 5.13%
CENTERLINE ALIGNMENT POSITION:
IN CENTER OF EXISTING ROW? No
OFFSET FROM CENTER: Varies
ON BRAND NEW ALIGNMENT? No
LEFT TURN LANES: 15 left turn lanes
MINIMUM LENGTH: 155.5’
MINIMUM STORAGE: 60’
WIDTH: 10’
_____
ANY DUAL LEFT TURN LANES? YES
NO X
ANY FREE RIGHT TURN LANES? YES One @ Denton Tap
_____
NO
_____
CRASH CUSHIONS / ATTENTUATORS INVOLVED YES
NO X
_____
RAILROAD CROSSINGS INVOLVED YES
NO X
NOTE: IF CURRENT CROSSING IS NOT USED, IS ABANDONMENT AN
_____
OPTION? YES
_____
NO
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PROJECT SCOPE ITEMS
Sandy Lake – Freeport Parkway To Denton Tap (ST 99-02B)
PAVEMENT STRUCTURE
DESIGN WHEEL LOAD: 18 kip single axle load
BUS AND HEAVY TRAFFIC: YES X
____
NO _
ROADWAY CLASSIFICATION: Major arterial
MINIMUM PAVEMENT STRUCTURE THICKNESS: 8”
MINIMUM PAVEMENT BASE OR SUBGRADE THICKNESS: 8”
DESIGN SPEED: 50 MPH (40 MPH @ Coppell Road North Intersection & 45 MPH @
Coppell Road South Intersection)
POSTED : 35 MPH
MEDIANS
MEDIAN WIDTH: 16’
_____
ANY MID BLOCK OPENINGS TO CONSIDER? YES
NO X
ANY SIDE STREETS TOO CLOSE FOR OPENING? YES X
(Branchwood Drive & Georgian Lane)
_____
NO
STANDARD TURN LANE WIDTH: 11’ min. & 12’ max.
STANDARD NOSE WIDTH: 6’
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PROJECT SCOPE ITEMS
Sandy Lake – Freeport Parkway To Denton Tap (ST 99-02B)
DRIVEWAYS:
MAXIMUM RESIDENTIAL GRADE: ¾”/ft.
MAXIMUM COMMERCIAL GRADE: ¾”/ft.
MINIMUM COMMERCIAL DRIVEWAY WIDTH: 20’ / 15’ one way
SIDE STREET CONSIDERATIONS
TURNING RADIUS, MINIMUM: 35’ major / 25’ residential and minor
Streets
PAVEMENT THICKNESS: 8”
COMMERCIAL DRIVEWAY THICKNESS: 6”
DRAINAGE TOPICS
STORM SEWER DESIGN CRITERIA:
TxDOT ________
CITY City of Dallas Drainage Design Criteria
HYDRO-35 X
TP-40 ________
INLET DEPTHS (APPROPRIATE FOR PAVEMENT THICKNESS) 4 ½’
MINIMUM COVER LATERALS 2’ below subgrade
BRIDGES/BOX CULVERTS INVOLVED YES X
_____
NO
100 YEAR FLOOD PLAIN CONSIDERATION yes / 2 FT FREEBOARD
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PROJECT SCOPE ITEMS
Sandy Lake – Freeport Parkway To Denton Tap (ST 99-02B)
PERMITS
COE 404 PERMITS NEEDED YES may be required because of the creek
crossing and construction of new bridge
NO _____
TNRCC 401 PERMIT YES may be required as part of 404
NO _____
CDC PERMIT YES _____
NO X
ADA PERMIT YES X
(If > $50,000 of pedestrian facilities)
_____
NO
ANY OTHER PERMITS FROM OTHER AGENCIES SUCH AS TxDOT, DFW,
AIRPORT, DART, ETC? YES (Plans will be submitted to the Texas
Historical Commission – may need permit if it is determined that any archaeological sites
are in the vicinity of the project )
_____
NO
UTILITIES
LIST OF ALL KNOWN UTILITES:
1.Southwestern Bell 4. AT&T Broadband
2.Oncor Gas & Electric 5. Metromedia Fiber Network
3.Verizon 6. Touch America
DOCUMENT KNOWN RISKS ( TRA lines, Transmission Towers, Lone Star Gas Valve
Stations) FOR OUR UTILITY PARTNERS: Oncor transmission towers – street
alignment moved to south to miss large towers
ARE UTILITIES ON EXISTING STREET R.O.W.? Yes
DO UTILITIES OWN THEIR R.O.W. OR HAVE PREVIOUS EASEMENTS?
Oncor has 40’ utility easement
HAS WORK ORDER BEEN ISSUED FOR SUE (Subsurface Utility Engineering)?
No
ANY SPECIAL CONSIDERATIONS? No
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PROJECT SCOPE ITEMS
Sandy Lake – Freeport Parkway To Denton Tap (ST 99-02B)
R-O-W ACQUISITION
RIGHT- OF- WAY CONSTRAINTS, IF ANY, PROVIDE A LIST AND
DESCRIPTION ALONG WITH DATA FOR RISK ASSESSMENT: Many of the
newer residential developments have dedicated right-of-way to accommodate the
roadway widening. In addition, they have utility, landscape, and open space easements
established beyond the right-of-way dedication. In the case of most older subdivisions,
individual properties, and undeveloped tracts, the existing right-of-way is not sufficient
for the proposed widening. There does not appear to be any right-of-way constraints.
ANY NON-ROUTINE, i.e., CEMETARY, JUNK YARD, OLD CHURCHES, SERVICE
STATIONS, CONTAMINATED SOILS, LANDFILLS, NOISE WALL CONSIDERATIONS,
TRAILER PARKS, TREE ORDINANCES? YES ______ NO X
ANY NON-CONFORMING ISSUES? YES _____
NO X
R-O-W MAP NEEDED YES Completed
NO _____
FIELD NOTES NEEDED YES Completed
NO _____
R-O-W PLATS NEEDED YES X
NO _____
RELOCATION ASSISTANCE INVOLVED YES _____
NO X
PARKING/LOSS OF PARKING CONSIDERATIONS YES _____
NO X
HISTORICAL SITE CONSIDERATION YES _____
NO X
6
PROJECT SCOPE ITEMS
Sandy Lake – Freeport Parkway To Denton Tap (ST 99-02B)
USUAL CITY TOPICS OF CONCERN
DESIGN STANDARDS TO BE USED? City of Coppell Design Standards & NCTCOG
ORDER OF PRECEDENCE OF STANDARDS. City of Coppell Design Standards &
NCTCOG
AUXILIARY LANES? None
PROVISIONS FOR FUTURE WIDENING? No
LANDSCAPING? Under separate contract – Parks and Recreation Department
EXPOSED AGGREGATE DRIVEWAYS, SIDEWALKS? No
STAMPED/COLORED CONCRETE? Yes
IRRIGATION? Yes
BRICK PAVERS? Yes
STREET LIGHTING? Streetlights will be placed in the median. Installation of the
foundations and conduit are included as part of the construction. Oncor will perform the
actual streetlight installation.
TRAFFIC SIGNALS? At the Coppell Road North and Coppell Road South intersections
PAVEMENT MARKINGS? Yes
BIKE LANES (EXTRA WIDTH)? Outer lane is 14.5’ & a separate 10’ hike & bike trail
NEW SIDEWALKS? Yes
DART BUS TURNOUTS? No
BUS STOPS OR BUS SHELTERS? No
WATER UTILITY BETTERMENTS? No WATER UTILITY RELOC.? Yes
SAN. SEWER BETTERMENTS? No SAN. SEWER RELOC.? Yes
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PROJECT SCOPE ITEMS
Sandy Lake – Freeport Parkwy To Denton Tap (ST 99-02B)
RETAINING WALLS? Proposed decorative stacked-block retaining wall system
(STONE, BLOCKS, GABIONS, PROPRIETARY TYPES)
SOD, SEEDING, TOPSOIL? Yes
DRAINAGE IMPROVEMENTS? Enclosed drainage system improvements & bridge
RR CROSSING IMPROVEMENTS? No
GRADE SEPARATIONS? No
RAMPS OR CONNECTORS TO TxDOT FACILITIES? No
SPECIAL SCHOOL OR EMERGENCY VEHICLE
CONSIDERATIONS
ANY NEARBY OR ADJACENT SCHOOLS, CITY HALL, FIRE OR POLICE
DEPARTMENT REQUIRING SPECIAL CONSIDERATION? No
PUBLIC INVOLVEMENT
CITY COUNCIL APPROVAL OF ALIGNMENT, REQUIRED? YES X
approval of preliminary plans and award of construction contract
NO _____
HAVE ALL NEIGHBOR GROUPS PROVIDED EARLY INPUT? YES _____
project will be broken into two sections, Freeport Pkwy. To Coppell
Road, and Coppell Road to Denton Tap - citizen input will be solicited NO X
for the Coppell Road to Denton Tap section
NEIGHBORHOOD MEETINGS REQUIRED?
not required, but will be conducted YES _____
NO X
IF REQUIRED WHO CONDUCTS, CITY OR COUNTY? City
DOCUMENT POTENTIAL SITES FOR PUBLIC AND OR NEIGHBORHOOD
MEETINGS. The meetings will be conducted at City Hall, located at 255 Parkway
Boulevard
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PROJECT SCOPE ITEMS
Sandy Lake – Freeport Parkway To Denton Tap (ST 99-02B)
CONSTRUCTIBILITY REPORT
FROM INSPECTION STAFF, DOCUMENT ANY AND ALL ISSUES THAT MAY
AFFECT PROJECT SCOPE, BUDGET, CONSTRUCTIBILITY, THE PROJECT
SCHEDULE AND/OR THE SAFETY OF PROJECT.
The east half of West Sandy Lake Road, from Freeport Parkway to Denton Tap Road is
almost completely developed with residential subdivisions. Right-of-way will be
required on both sides of the existing roadway.
The existing irrigation and landscaping adjacent to the right-of-way, and currently
maintained by an HOA, is an issue that will have to be addressed.
Four of the smaller Oncor electric transmission poles will need to be relocated. They are
located within an exclusive Oncor easement and the relocation will be an expense of the
City.
There are overhead power lines on the south side of Sandy Lake and five buried power
line crossing that will need to be relocated. There is an overhead power line on the north
side of the roadway that will need to be relocated. There are several buried lines that feed
off of this line that will need to be evaluated.
There is a high-pressure 24-inch gas line that crosses the roadway that may require
lowering. There are gas distribution lines on both the north and south sides of the
roadway that will need to be relocated.
Access across construction areas will need to be provided throughout all phases of
construction. Temporary pavement will be needed to accommodate construction and
allow the existing roadway to remain in use. Most intersections will need to be
constructed in phases to facilitate continuous access to and from Sandy Lake Road.
Access to private drives will also have to be maintained.
The interconnect system of the proposed traffic signals will need to be addressed.
Tree removal from Coppell Road to Denton Tap will be a major issue.
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