Old Town-CS100503
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Keith Marvin - Old Town
From: Tricia Hatley <thh@freese.com>
To: "breid@ci.coppell.tx.us" <breid@ci.coppell.tx.us>
Date: 5/3/2010 1:07 PM
Subject: Old Town
CC: Keith Marvin <kmarvin@coppelltx.gov>, David Beckman <dsb@freese.com>
Brad,
I have a couple of questions to pass along to you from our electrical engineer, David Beckman, on the Old Town
project. He is working on the street light design and had some questions that Keith felt like needed to be sent in
your direction. I appreciate your help with these questions that have to do with how you want the meter
arrangement for the pavilion, irrigation controllers and tree well receptacles:
FNI suggests one meter for the tree well lighting and a separate meter for the pavilion and park-related
electrical devices. Any irrigation controllers for the park area should be powered from the pavilion
electrical system. Street lights within the park are will be powered along with all the other street lights
on the project, not the park meter. By meter, we are referring to the meter/panel board/electrical
system. Please verify if you agree with this plan.
I believe that FNI has been directed to allow for power in the islands of the Farmer’s Market parking
area. We will plan on having 2” conduit installed under the pavement from each grass island to the park
area. This is assuming that the electrical needs are just 120V receptacles in weatherproof boxes and
nothing more elaborate. Please confirm that this is the correct assumption.
How does the city want to control the tree well receptacles? To allow for more flexibility, it would
probably be best to have on/off capability versus a photocell/contactor that would only be appropriate
for tree lighting. For a flexible design, we’d suggest using a split-bus panel where a city employee can
manually switch a breaker that either turns the circuits ‘off’ or ‘on’. Given that the tree wells are so
spread out, we will probably need multiple small transformers/panels to keep voltage drop in check. Do
you want one single point to control all of the tree well outlets?
Please feel free to call me at 214-217-2217 or David Beckman at 817-735-7341 if you need clarification or have
any questions. We appreciate your response to these questions!
Thanks!
Trish
Tricia H. Hatley, P.E., LEED AP
Freese and Nichols, Inc.
1701 N. Market Street, Suite 500
Dallas, TX 75202
214-217-2217
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