ST9902-CS030205
PROJECT SCOPE ITEMS
SANDY LAKE – SH 121 TO FREEPORT PARKWAY
ST 99-02 A
PAVEMENT AND ALIGNMENT TOPICS
PAVEMENT SECTION
PAVING DESIGN CRITERIA City of Coppell Construction Design Standards & North
Central Texas Council of Governments Standard Specification for Public Works
ROW WIDTH:
Existing: Varies - 55’
Proposed: 110’ minimum
PAVEMENT WIDTH:
Existing: 24’
Proposed: 2 – 27’ back to back
No. of lanes proposed: 4 lanes
PARKWAY:
Proposed Width: Varies
Proposed Sidewalk Width: 5’
Parkway cross fall slope maximum: 3”/ft.
GRADE REQUIREMENTS:
Is TC below adjacent ground criteria to be followed? No
Any deep cuts, high fills? No
PAVEMENT CROSS FALL:
PROPOSED: ¼”/ft.
MINIMUM: ¼”/ft.
MAXIMUM: ¼”/ft
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PROJECT SCOPE ITEMS
Sandy Lake – SH 121 To Freeport Parkway (ST 99-02A)
VERTICAL GRADE:
MINIMUM: 0.5%
MAXIMUM: 1.35%
CENTERLINE ALIGNMENT POSITION:
IN CENTER OF EXISTING ROW? No
OFFSET FROM CENTER: 27’
ON BRAND NEW ALIGNMENT? No
LEFT TURN LANES: 2 left turn lanes
MINIMUM LENGTH: 295.5’
MINIMUM STORAGE: 200’
WIDTH: 10’
_____
ANY DUAL LEFT TURN LANES? YES
NO X
ANY FREE RIGHT TURN LANES? YES One @ Royal Lane
_____
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 – SH 121 To Freeport Parkway (ST 99-02A)
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
POSTED : 40 MPH
MEDIANS
MEDIAN WIDTH: 16’
_____
ANY MID BLOCK OPENINGS TO CONSIDER? YES
NO X
ANY SIDE STREETS TOO CLOSE FOR OPENING? YES _____
NO X
STANDARD TURN LANE WIDTH: 11’ min. & 12’ max.
STANDARD NOSE WIDTH: 6’
3
PROJECT SCOPE ITEMS
Sandy Lake – SH 121 To Freeport Parkway (ST 99-02A)
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 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 n/a FT FREEBOARD
4
PROJECT SCOPE ITEMS
Sandy Lake – SH 121 To Freeport Parkway (ST 99-02A)
PERMITS
COE 404 PERMITS NEEDED YES _____
NO X
TNRCC 401 PERMIT YES _____
NO X
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 – 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
5
PROJECT SCOPE ITEMS
Sandy Lake – SH 121 To Freeport Parkway (ST 99-02A)
R-O-W ACQUISITION
RIGHT- OF- WAY CONSTRAINTS, IF ANY, PROVIDE A LIST AND
DESCRIPTION ALONG WITH DATA FOR RISK ASSESSMENT: Right-of-way will
only be required on the south side of the roadway. 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
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PROJECT SCOPE ITEMS
Sandy Lake – SH 121 To Freeport Parkway (ST 99-02A)
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? Yes
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 Royal Lane intersection
PAVEMENT MARKINGS? Yes
BIKE LANES (EXTRA WIDTH)? Outer lane is 14.5’
NEW SIDEWALKS? There may not be a need for sidewalks on the west end of Sandy
Lake due to its commercial/industrial characteristics and the limited amount of right-of-
way on the north side would require the sidewalks to be constructed adjacent to the curb.
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 – SH 121 To Freeport Parkway (ST 99-02A)
RETAINING WALLS? No
(STONE, BLOCKS, GABIONS, PROPRIETARY TYPES)
SOD, SEEDING, TOPSOIL? Yes
DRAINAGE IMPROVEMENTS? Enclosed drainage system improvements & box
culvert
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 _____
NO X
HAVE ALL NEIGHBOR GROUPS PROVIDED EARLY INPUT? YES _____
not applicable – commercial / industrial area NO _____
NEIGHBORHOOD MEETINGS, REQUIRED? YES _____
not applicable – commercial industrial area NO _____
IF REQUIRED WHO CONDUCTS, CITY OR COUNTY? City
DOCUMENT POTENTIAL SITES FOR PUBLIC AND OR NEIGHBORHOOD
MEETINGS. not applicable
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PROJECT SCOPE ITEMS
SANDY LAKE – SH 121 TO FREEPORT PARKWAY
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.
Right-of-way from SH 121 to Freeport Parkway will only be required on the south side of
West Sandy Lake Road. The alignment of the proposed roadway was established based
on the location of the existing Oncor transmission towers along the north side of the
roadway, which resulted in all roadway widening to the south.
The alignment with the future SH 121 interchange is an issue. The proposed
improvements will begin a sufficient distance east of SH 121 so that permanent
improvements will not be needlessly constructed only to be removed when the
interchange is built.
There are overhead power lines on the south side of Sandy Lake and several 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 most likely need to be relocated.
There is a gas distribution line on the north side of the roadway that turns south and
crosses Sandy Lake Road and proceeds along the east side of Royal Lane. It will need to
be evaluated.
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.
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