Grapevine Creek-CS120608AA
PIBLIRN&
CARSON
June 8, 2012
City of Coppell
Engineering Department
Attn: Michael Garza, EIT
255 Parkway Boulevard
P.O. Box 9478,
Coppell, Texas 75019 -9478
RE: Lower Deck Addition
150 East Bethel Road
Coppell, Texas 75019
WO 12077
Dear Mr. Garza:
LA) 4
Piburn & Carson, LLC has been asked by Mr. Timothy G. Pletta to review the proposed lower deck addition to
the existing deck located at 150 East Bethel Road, Coppell, Texas 75019 as it relates to existing Grapevine Creekflood
plain. Mr. Pletta has previously retained our firm to review the flood plain issues and to prepare a letter of map
revision to FEMA for the property located at 140 East Bethel Road and adjacent to his residence. As such, we are
familiar with the applicable existing flood study of Grapevine Creek, which impacts Mr. Pletta's property located at
150 East Bethel where the lower deck addition is proposed. The addition of one row of 4" posts and a lower deck
elevation of 486.31', in my professional opinion will not adversely affect the 100 -year flood plain. The posts are in a
line parallel to the flow in Grapevine Creek and here is approximately 6' open space below the proposed lower deck.
Mr. Pletta has expressed his instructions that completion of the flood study associated with his property located at
140 East Bethel Road, shall incorporate the lower deck, as proposed, at 150 East Bethel Road. Mr. Pletta has further
assured our firm and indicated to the City of Coppell, that in the event the flood study is not completed, then Mr.
Pletta agrees to remove, at his sole cost and expense, the lower deck addition. Currently, we are in the process of
obtaining written consent to use material prepared by Mr. Pletta's previous engineer and expect Mr. Pletta's Letter
of Map Revision to be completed by the end of the year.
In conclusion, a revision of the applicable flood study of Grapevine Creek, the height, location and clearance
under the proposed lower deck addition, in our opinion, will not adversely affect the Grapevine Creek 100 - yearflood
plain. The inclusion of the above - referenced language will serve to protect the City, should the application not be
accepted by FEMA.
Please feel free to contact me if you have any questions.
Sincerely,
Piburn &Carson, LLC 1b oo q
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Richard Carson, Jr. P.E �• •••.• ...............<...,.,,,..
Executive Vice President RICHARD CARSON,JR.
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Hatcher Build & Const., Inc.
9535 Forest Lane, Suite 229, Dallas, TX 75243
Ph: 214-328-3500 Fax: 214-328-3512