Magnolia Park-CS 961112 ~ The City With A Beautiful Future
November 12, 1996
Mr. Bill Anderson
Dowdey, Anderson and Associates, Inc.
16250 Dallas Parkway, Suite 100
Dallas, TX 75248
RE: Magnolia Park / Construction Plans
Dear Mr. Anderson:
The City of Coppell has received and reviewed the referenced plans and has th,
to offer:
1. Submit revised plat with plans showing all easements and street nam
2. Show all storm inlet locations on the paving plans.
3. Show location of sidewalks and provide note to be constructed when
4. Show correct street names on paving, utility, drainage area map, gra
plans
5. Provide a note stating roll down ramps to be provided at all street it
6. On paving plans, show top-of-curb elevations at 100' intervals in th~
7. Label all alleys as a consecutive number instead of by block and nm
plans and plat.
8. Show all alley and street radius on paving plans.
9. On plate #4 show paving widths.
10. Sidewalks adjacent to common areas or areas that will not have lot:
when the streets are paved.
11. An 8' wide brick paverband m~ust be provided for tlj~str?et,'mter_secti
12. A temporary culvert needs to ~oe provided under th6 s~et,connecting
13. Provide paving dimensions on all paving plan sheets.
14. Label the alleys on the drainage area map.
15. Make changes to general notes as indicated on the plans.
16. Any details other than the City of Coppell details need to be provided
plans.
17. Show all water and sanitary sewer crossings on the storm sewer pro
18. The maximum allowable slope is 4:1.
19. On plat #22 an inlet needs to be provided on Natches Trace Drive b
Plantation Place. Also, provide an inlet at bend in Levee Plantatio~
20. Provide concrete collars on drainage pipes as indicated on drainage
following comments
changes.
.~ach lot is developed.
cling and storm sewer
ttersections.
; profile view.
nber and show on all
must be constructed
lg Denton Tap Road.
to Demon Tap Road.
with the construction
?lie sheets.
,,fore it crosses Levee
Dr. (see Plat #22)
dans.
21.
22.
23.
24.
25.
26.
27.
28.
29.
30.
31.
32.
33.
34.
There are various other minor comments throughout the plans. Once these
addressed, the marked up plans along, with two revised se.t.9~of ~laI~s sh_ould
City for review. If any major change~-occur please indicate~on the plans. If
questions concerning these comments, please contact me at 304-3681.
Provide concrete rip-rap at all headwalls to prevent erosion.
On the water and sewer plans, please address the following comme~tts:
a. Provide four additional water valves as indicated on the plans.
b. Provide a manhole at the end of Canemount Plantation.
c. Be sure that sanitary sewer manholes are placed between the back of curb and the
future sidewalks.
d. Show all storm drainage and water line crossings on the sanitar~ sewer prof'fle sheets.
On the grading plans indicate Type A, B or C as per F.H.A. AlsO, provide the existing
grades around the perimeter of the development. /
Indicate direction of flows in the alleys and streets on the grading plans.
More information needs to be provided on the proposed lake impro~'ements:
a. Are there any outflow/overflow weirs to be constructed?
b. Are the trails to be built when the streets are constructed?
c. Show the 100-year water surface elevations of the proposed 80' wide channel.
Parkland dedication to be constructed as per the Planned Developmen (PD) Zoning for this
development.
Provide top of asphalt paving elevation where the entry street interse~ :ts Denton Tap Road.
Provide pavement markers for median as indicated on Plate//4 using City's Construction
Details.
Provide information regarding temporary deceleration and acceleratio~ ~ lanes on Denton Tap
Road. Also, provide a plan to show the installation of a temporary l?ft turn lane for north
bou, n~d, traffic on Denton Tap Road. I
A C factor of 0.65 need to be used for drainage computationI when using rainfall
intensities from Hydro 35. /
Storm Sewer Line 'B' inlet in alley needs to be located at low point i/~ alley (see Plat//22).
The top-of-curb elevations shown on paving plans do not match t~p-of-inl,e,t elevations
shown on Storm Drainage Plans. Also, all top of inlet elevations sh9uld be 9 or .75 foot
higher than invert elevation of storm drainage inlets as per the City's IConstruction Details.
All sanitary sewer line radius needs to be in conformance with TNR~C specifications.
Can all the "Highway Commercial" zoned property located at the n~>rtheast corner of the
development be connected to the proposed sanitary sewer stub out sh, ~wn on the water and
sewer plans? Does an additional sanitary sewer stub need to be pro~'ided?
comments have been
be resubmitted to the
you should have any
Sincerely
Michael A. Martin, E.I.T.
Assistant City Engineer