hi, chris,
 
the inlet on the pronton where the zone 1 originally drain to, has two 10' inlets. i have no info on the line size. clay never get it to me. and there is another 10' inlet on the proton,
its about 300' west of this double inlet. i really don't see a problem on its capacity.
 
my read on this is that clay didn't like to change the existing drain pattern. so if we install a new drain system, it will take care of his concern. also caly got a point that the north
landing ramps(2) are lower than the grade, and it has a chance to back flow into the building if the line ever get clogged up. this new system, though, will address both issues at owner's
additional cost

respectfully
chaucer

On Thu, Apr 22, 2010 at 4:25 PM, Chris Robinson <crobinson@gra-ce.net> wrote:


	Chaucer,

	 

	Have you determined that discharging the roof runoff overland to the inlet in Proton is not an option under the Town’s drainage standards?

	 

	Chris Robinson, P.E.

	Grantham & Associates

	1919 S. Shiloh

	Suite #440, LB 8

	Garland, TX 75042

	972-864-2333 ext. 121

	214-869-8912 cell

	972-864-2334 fax

	________________________________

		From: chaucer chern [mailto:chaucerdesign@gmail.com] 
	Sent: Thursday, April 22, 2010 3:42 PM
	To: Clay Barnett; Chris Robinson; Ross Harle
	Subject: Re: revised storm drain, Crown Plaza

	 

	good afternoon, gentlemen

	 

	after studying your 2nd review, here is my proposal:

	 

	1. install a new storm drain system, composed of 24" grate inlet and 15 and 18" RCP, to guide all roof  water back to original 10' curb inlet on the midway road. thus we are not changing
the original drainage system, and hence, not adding water to the inlet on the proton street.

	2. the new storm line has capacity up to 6 cps, and maintain drainage speed 2' per second at 1% or better slope

	3. this system drain into existing 10' curb inlet, which connects to city's line on a existing 18" RCP

	4. i'll revise the drainage calculation

	5. will continue the plan clean ups for better clarity

	 

	have a great day

	respectfully

	chaucer

	 

	
	 

	On Wed, Apr 21, 2010 at 3:22 PM, Clay Barnett <cbarnett@addisontx.gov> wrote:

	Chaucer,

	 

	Attached are the comments for Crown Plaza.

	 

	Thanks,

	Clay Barnett, P.E.

	Town Engineer

	Town of Addison

	16801 Westgrove Drive

	Addison, TX 75001-2818

	Office: (972) 450-2857

	 <http://www.addisongreen.info/> 

	 

	
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