Coppell CC 1B1-CS010319Mike Glenn, P.E.
Glenn Engineering
100 Decker, Suite 250
Irving, Texas 75062
T H E C I T Y 0 F
COPPE £
March 19, 2001
FILE
RE: Coppell Commerce Center Phase I, Blk 1R (Koll Center Coppell)
Dear Mr. Glenn:
The City of Coppell has reviewed the referenced plans and has the following comments to offer:
1. The proposed driveways onto Freeport Parkway need to be sloped to prevent drainage on
Freeport Parkway from entering the site, i.e., a high point in the driveway should be set on
the property line.
2. Show' the storm drainage systems in a light line weight on the Grading Plan.
3. The bottom of the proposed detention pond is shown to be flat on the Grading Plan. It would
be advisable to provide a flume from the outfall of the storm drainage system to the outfall
structure.
4. The proposed storm drainage system line SS-2 should be located out from underneath the
private paving and into the right-of-way of Bums Street.
5. Storm sewer manholes need to be provided at distances no greater than 500' apart. Refer to
the storm sewer plans for approximate locations.
6_. Storm sewer line SS-1 is labeled incorrectly on the Storm Sewer Plan sheet. It is labeled as
36" RCP instead of 4'x 2' RCB which is what is shown on the Storm Sewer Profile sheet.
7. Provide weir calculations showing the discharge rate of the weir at the 2, 10, and 100-year
storm events.
8. Concrete rip rap should be provided at all store] sewer outfall structures.
9. The existing sanitary sewer line needs to be brought up to the City's current standards.
10. All fire hydrant locations must be approved by the Fire Marshal, Travis Crump. Also they
must be located within 3' from the fire lane.
1 l. Water valves need to be added and/or moved as shown on the Utility Plan.
12. How will the proposed water vault at the southeast comer of the development be installed if
you are proposing a 3' high berm? Also, need to make sure the proposed northern water
vault will not conflict with landscaping, i.e., trees.
13. At least a 10' separation must be kept between the proposed 8" fire line and the existing 8"
sanitary sewer line.
14. Show the 8' wide brick paver 1' inside the property line at each of the driveways onto
Freeport Parkway as per the City Standards.
15. The following items should be addressed on the Left Turn Lane sheet:
a) Provide proposed top of curb elevations
b) Will there be any trees which will need to be removed and replaced? If so, a tree permit
will be required. Contact Brad Reid at 972-304-3561.
255 PARKWAY ltt P O BOX 478 11~COPPELL TX 75019 ~1~TEL 972/462 0022 ~' FAX 972/304 3673
c) Any median which is 8' wide or less will need to be either full depth concrete or
constructed with brick pavers.
d) A barricade plan will be required when construction begins on the turn lane.
16. The proposed stabilized construction entrance should be shown on Bums Street or Hammond
Street.
17. Show and label existing and proposed grades on the storm sewer profile.
There are various other minor comments throughout the plans. When all comments have been
addressed, please return these marked plans and two sets of revised plans to the City for
review. If you have any questions, please contact me at (972) 304-3681.
Sincerely,
Assistant City Engineer