Billingsley-CS070406NATIONAL FLOOD INSURANCE PROGRAM
FLMA NA'I'IfJNAL SIrRVICE PRC)VIllI3R
Apri16, 2007
Mr. Brandon A. Luedke, E.I.T.
Halff Associates, Inc.
8616 Northwest Plaza Drive
Dallas, TX 75225
Dear Mr. Luedke:
IN REPLY REFER TO:
Case No.: 06-06-BE95P
Communities: Cities of Coppell, Dallas,
and Irving, TX
Community Nos.: 480170, 480171, and 480180
316-AD
This is in regard to your request dated July 10, 2006, that the Department of Homeland Security's Federal
Emergency Management Agency (FEMA) issue a revision to the Flood Insurance Rate Map (FIRM) for
Dallas County, Texas and Incorporated Areas. Pertinent information about the request is listed below.
Identifier:
Flooding Source:
FIRM Panel(s) Affected:
158.6-Acre Billingsley Tract
Grapevine Creek
48 1 1 3001 55 J
The data required to complete our review, which must be submitted within 90 days of the date of this
letter, are listed on the enclosed summary.
If we do not receive the required data within 90 days, we will suspend our processing of your request.
Any data submitted after 90 days will be treated as an original submittal and will be subject to all
submittaUpayment procedures, including the flat review and processing fee for requests of this type
established by the current fee schedule. A copy of the notice summarizing the current fee schedule, which
was published in the Federal Register, is enclosed for your information.
FEMA receives a very large volume of requests and cannot maintain inactive requests for an indefmite
period of time. Therefore, we are unable to grant extensions for the submission of required data/fees for
revision requests. If a requester is informed by letter that additional data are required to complete our
review of a request, the data/fee must be submitted within 90 days of the date of the letter. Any fees
already paid will be forfeited for any request for which the requested data are not received within 90 days.
3601 Eisenhower Avenue, Alexandria, VA 22301-W25 PH:1-877-FEMA MAP FX: 703.960.9125
The Mapping on Demand Team, under contract with the Federal Emergency Management Agency, is the
National Service Provider for the National Flood Insurance Program
2
If you have general questions about your request, FEMA policy, or the National Flood Insurance Program,
please call the FEMA Map Assistance Center, toll free, at 1-877-FEMA MAP (1-877-336-2627). If you
have specific questions concerning your request, please call the Revisions Coordinator for your State,
M. Saleem Ashraf, Ph.D., P.E., who maybe reached at (703) 960-8800, ext. 5229.
Sincerely,
Sheila M. Norlin, CFM
National LOMC Manager
Michael Baker Jr., Inc.
Enclosures
cc: Mr. Kenneth M. Griffin, P.E.
Director
Engineering and Public Works
City of Coppell
Mr. Steve Parker
Floodplain Manager
City of Dallas
Mr. Garry Fennell
Senior Civil Engineer
City of Irving
Mr. Henry Billingsley
Partner
Billingsley & Co.
Mr. Walter E. Skipwith, P.E.
Vice-President
Halff Associates, Inc.
`~ ~ ~TA'~IOrTAL FLOOD INSZJRANCE PROGRAeM
1;IMA NATIONAL S1I~RVIC~ Pltt)VII)BR
Summary of Additional Data Required to Support a
Letter of Map Revision
Case No.: 06-06-BE95P
Communities: Cities of Coppell, Dallas,
and Irving, TX
Requester: Mr. Brandon A. Luedke, E.I.T.
Community Nos.: 480170, 480171, and 480180
The issues listed below must be addressed before we can continue the review of your request.
Our review of your request, which includes the topographic work map, the photographs, and the
models, revealed that this project may create a potential for erosive conditions and/or channel scour
along Grapevine Creek between Cross Sections 11300 and 14170. Elevations of the flood having a
1-percent chance of being equaled or exceeded in any given year (base flood} at all cross sections may
also inundate the bases of the as-built retaining walls. Please provide documentation certified by a
registered professional engineer, which demonstrates that the issues of erosion protection, channel
stability, and channel scour have been addressed in the design and construction of these walls.
2. Your recent submittal of the topographic work map did not include the boundary delineations of the
post-project flood having a 0.2~-percent chance of being equaled or exceeded in any given year. Please
resubmit a topographic work map with the boundary delineations of the 0.2-percent-annual-chance
flood.
The floodway notification distributed by each community stating their intent to revise the floodway in
accordance with Paragraph 65.7(b)(1) of the National Flood Insurance Program regulations previously
submitted states that revision to the floodway is on the south side of Grapevine Creek. However, your
recently submitted models show the revision to the floodway on both sides of the creek. Therefore,
please resubmit a copy of the public notice distributed by each community which states that the
floodway revision is to the both sides of Grapevine Creek, or a statement from each community that all
affected property owners have been notified.
Please send the required data directly to us at the address shown at the bottom of this page. For
identification purposes, please include the case number referenced above on alI correspondence.
3601 EisenhomerAvenae, Alexandria, VA 2230.6*25 PH:1-877-FEMA MAP FX: 703.960.91T5
The Mapping on Demand Team, under contract with the Federal Emergency Management Agency, is the
National Service Provider for the National Flood Insurance Program