Sandy L Add(1)/FP-CS 901206GINN, INC.
CONSULTING ENGINEERS
December 6, 1990
Ms. Shohre Daneshmand, P.E.
City of Coppell
P.O. Box 478
Coppell, TX 75019
Re:
Sandy.Lake Addition
Food Lion, Inc.
Final Construction Plans
Dear Ms. Daneshmand:
We have reviewed the above referenced plans for general
conformance to the city of Coppell ordinances and standards. The
following sets forth our comments.
Plans have been reviewed by Engineering Department, Public
Works Department, Utilities, Streets and Parks Departments.
Please review all comments shown on plans and return marked
up plans with corrections.
o
The proposed left turn lane from Sandy Lake Road onto the
Food Lion site is not an acceptable solution. Please
provide a traffic study along with recommendations. A
"free" right turn lane (westbound) may be acceptable if
properly designed. Using the existing westbound lane of
Sandy Lake for a proposed center left turn lane is not
advised.
Provide curve data on curves of fire lanes along south end
of project. Provide correct curve radii information on all
fire lane curves as per plat.
Provide additional dimensions on site plan to adequately
locate paving and parking. ~
Indicate easements on site plan as per those shown on plat.
Include plat as part of these plans.
On right turn lane, clarify proposed fill/grading in Sandy
Lake Road right-of-way. Also, new pavement section, if
approved, shall be a minimum of 12' in width.
7. Provide stop sign at Samuel Blvd. and fire lane.
17103 Preston Road · Suite 100 · LB 118 · Dallas, Texas 75248 · Phone 214/248-4900
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Solid red striping must meet requirements for "FIRE LANE"
striping. Indicate details.
Minimum parking lot thickness shall be 6" concrete as per
subdivision ordinance.
Future improvements to Sandy Lake Road require that the
drainage easement along the west property line be provided.
It appears that parking and landscaping has been placed over
this easement and may have to be removed at some future
date. Has this been considered?
Clarify grades in southwest corner of property.
for specific area.
See plans
It appears that very little surface runoff will enter inlet
A-3 due to the grades shown. Please address.
Line "E", storm drainage, 18" culvert under fire lane
appears to have a "cover" problem. What will permanent
structure be in this area?
Clarify grading plan questions shown on Sheet C-2.
Provide erosion control measure at northwest corner of
property where headwall discharges onto Lee Elementary
School property.
Provide additional details of headwall Al/Bi.
When will channel improvements (along Lee Elementary School
property) be done? How does it affect the Food Lion
property if not done concurrently?
Entire storm drainage system needs to be recalculated. It
appears that "Hydro 35" intensity (9.0 in/hr) was utilized
instead of City required "TP-40" (11.6 in/hr).
At the upstream end of Line "A", why not use, with headwall,
for drainage purposes at this time instead of waiting until
"future"?
At northeast corner of property, grading, plan shows
construction of wye inlet, but headwall construction is
shown on drainage plan, sheet C-2A. Please clarify.
Please clarify Section A-A on Sheet C-2 grading plan.
Contours and dimensions shown do not appear to be
coinciding.
On drainage area and calculations Sheet C-2A, please see
comments regarding TP-40 vs. Hydro 35. Pipe sizes may
change due to increased flows. Please address.
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Wingwall for Line "A" (30" RCP) does not appear to be
adequate for 36" RCP at angle shown and size proposed.
Please address.
Please address Line "E" temporary pre-development structure.
Please reconsider and address the size of the "Sag" inlet
(D-2) after recalculation occurs.
On the utility plan, provide DR14, 200 psi PVC pipe, unless
approved otherwise by City Engineer.
Add 8" gate valve at west side of building. See plans for
location. Also add one on east side on 8" line heading east
to Samuel Blvd.
Add test port manhole on 6" sanitary sewer north of proposed
grease trap.
Add double check back-siphonage device to 6" master meter at
front of property along Sandy Lake.
Where and how will the proposed 8" waterline from the
building, east to Samuel Blvd., be located? Please clarify.
Provide 6" master meter and double check back siphonage
device on the 8" line near Samuel Blvd.
Check with fire department, Marshall Troy Glidewell,
regarding fire "loops".
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Ail sanitary sewer mains shall be videoed prior to
acceptance. See plans. Add to note #8.
Note 14, Utility Plan Sheet C-3, shall indicate Class 200,
DR 14 for PVC pipe. All fire hydrants shall be painted all
yellow.
Provide anticipated average daily water and sanitary sewer
demands.
On Offsite Utility Sheet C-3A - extra depth manholes shall
be minimum 5' diameter. Indicate proposed ditch bottom
elevation in profile; provide trench safety plans; manhole
at Station 5+00 should be 5' diameter and please clarify how
much will be exposed due to ditch construction; please
clarify whether construction easement will be required along
the west side of the property; provide dimension from west
property line to sanitary sewer line; indicate proposed
headwall, pipes and erosion control at south end of ditch.
37.
On storm sewer profiles, Sheet C-4, indicate correctly the
connection of the 36" RCP to the wingwall of the 30"
headwall; on Line "B", align "tops" of storm sewer pipes,
not flowlines; provide a minimum of 2'-6" separation from
waterlines and storm sewer lines; show HGL on all profileS;
calculations, pipe capacities, HGL, etc. may change due to
use of Hydro-35 vs TP-40 in drainage design criteria.
38. Please clarify 8" Class III PVC as shown on profile sheets.
39.
On "stop sign" details, City typically requires square post
with anti-theft bolts/nuts, breakway type pole, and height
shall be 7'. See comments on plans.
40. No precast inlets allowed.
41.
On landscape plans, an approved oWner's agreement for
responsibility of maintenance of streetscape elements in the
parkway needs to be provided.
42.
Ail landscaping shall conform to City of Coppell streetscape
plan and plant legend as shown. Approval by owner's
representative is subject to conformance to streetscape
plan.
43.
On irrigation detail, double check gate valve - fittings to
be all bronze. Valve box and cover to be galvanized.
Other than the above stated items, we have no further objections
to the plans as submitted. Should you have any questions or need
additional information, please contact our office.
Sincerely,
Gabe Favre
GF/dsp
cc:
Taryon Bowman
Winkelman & Assoc.
H. Wayne Ginn, P.E.
File 90441