Gibbs Station 2-CS100419Page 1 of 2
Rhonda Adloo - Re: 1052 Creek Crossing (Gibbs Station II)
From:
Ken Griffin
To:
Mark Roberts
Date:
4/19/2010 9:48 AM
Subject: Re: 1052 Creek Crossing (Gibbs Station II)
CC: Rhonda Adloo
Mark
If you can survey the property and it shows the land is naturally higher than the floodplain elevation,
then you can obtain a LOMA to remove a portion of the property from the floodplain. However, any
changes to the floodplain location will require a replat that officially moves the floodplain line, before
a building permit is issued.
As for as building in the existing floodplain, until I know the extent of what you are proposing, I can't
commit either way. I'm unsure of the magnitude of the encroachment, whether or not any fill will be
placed and whether or not a fence is being proposed. It seems that a patio would require placement of
fill, but a deck may be able to cantilever over the floodplain.
For me to provide more detailed information, I need a to scale site plan showing all proposed
improvements.
Ken Griffin, P. E., CFM
Director of Engineering & Public Works
972 - 304 -3686
kgriffingcoppelltx. gov
>>> "Mark Roberts" <mrobertsgndmce.com> 4/17/2010 3:30 PM >>>
Ken - We have been contacted by the home owner at this address to give him a proposal to do a hydraulic study. He wants
to be able to build a deck or patio behind his existing swimming pool. From comparing an aerial photo with the plat of his
subdivision, it appears that the pool abuts the Floodplain Easement on his property. That means the proposed deck would
encroach into the FP Easement. Also, the new DFIRM map shows the floodplain extending a little beyond the easement line
into his existing pool deck area.
We may be able to do a topographic survey of the property and determine that the existing deck and be removed from the
FP by a LOMA if the existing elevations are above the base flood elevation. As far as the proposed deck extending into the
floodplain, if we can model that and show it doesn't raise the water surface elevation is that going to be acceptable to the
City? Would the City require a replat to change the easement? Would the City require a CLOMR & LOMR from FEMA or
could we just submit the study to you for review and approval and then give the homeowner a building permit? What other
mitigation elements would be involved?
I've attached some information I have gathered on the property. Thanks for your assistance.
Mark W. Roberts P.E., CFM
Nathan D. Maier Consulting Engineers, Inc.
Texas PE Firm No. F -356
Two Park Lane Place
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8080 Park Lane
Suite 600
Dallas, Texas 75231
Ph: 214-739-4741
Fax: 214 - 739 -5961
email: mroberts @ndmce.com
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