HomeMy WebLinkAbout20161921.tiffFederal Emergency Management Agency
CERTIFIED MAIL
RETURN RECEIPT REQUESTED
The Honorable Mike Freeman
Chairman, Weld County
Board of Commissioners
1150 O Street, P. O. Box 758
Greeley, CO 80632
Dear Mr. Freeman:
Washington, D.C. 20472
June 1, 2016
IN REPLY REFER TO:
Case No.: 16-08-0330R
Community: Weld County, CO
Community No.: 080266
104 RECEIVED
JUN 13 2016
WELD COUNTY
COMMISSIONERS
This responds to a request that the Department of Homeland Security's Federal Emergency Management
Agency (FEMA) comment on the effects that revised flood hazard information would have on the effective
Flood Insurance Rate Map (FIRM) and Flood Insurance Study (FIS) reports for your communities in
accordance with Part 65 of the National Flood Insurance Program (NFIP) regulations. In a report dated
January 2016, Dr. Andrew Earles, P.E., Vice President of Water Resources, Wright Water Engineers, Inc.
requested that FEMA evaluate the effects that revised hydrologic analyses would have on the flood hazard
information shown on the effective FIRM and FIS reports. All data required to complete our review of this
request for a Conditional Letter of Map Revision (CLOMR) were submitted with letters from Dr. Earles.
Because this revision request also affects the Cities of Brighton, Commerce City. Thornton, Littleton,
Englewood, Sheridan, Denver, Fort Lipton; the Town of Columbine Valley; and Unincorporated areas of
Douglas, Adams, Arapahoe, and Jefferson Counties, separate CLOMRs for those communities were issued
on the same date as this CLOMR.
Information pertinent to this revision request is listed below.
Identifier:
Flooding Source:
FIRM Panels Affected:
AsYlineutr; 1 CA
4, -.21) -
South Platte River Hydrology CLOMR
South Platte River
08035C0015F, 08035C0016F, 08005C0433K,
08005C0434K,08005C0432K,080266098IC
08005C0144K, 08005C0142K, 08005C0161 K,
0800460211H, 0800460192H, 0800460184H,
0800460203H, 0800460182H, 0800460069H.
0800460088H, 0800460086H, 0800460087H.
08001C0611H, 08001C0612H, 08001C0604H,
08001 C0608H, 08001 C0602H, 08001 C0606H,
08001C0607H, 08001C0318H, 08001C0319H,
08001C0317H, 08001C0336H, 08001C0328H,
08001C0326H, 08001C0327H, 0802660995C,
0802660983C, 08123C2102E, 08123C02115E
& 08123C2104E
2016-1921
FIRM Panels Affected witin
the Unincorporated Areas of
Weld County:
0802660995C, 0802660983C & 080266098IC
We have completed our review of the submitted data and determined that the discharges presented in the
report entitled "CLOMR Request for South Platte River, Chatfield to Fort Lupton," Wright Water
Engineers, dated November 2015, are reasonable, and that the effective discharges should be revised. We
based this determination on the 10 -percent, 2 -percent, 1 -percent, and 0.2 -percent annual -chance discharges
computed in the submitted hydrologic analysis. Upon completion of a revised hydraulic analysis utilizing
this submitted hydrologic analysis, your community must submit the data listed below and request that we
make a final determination on revising the effective FIRM and FIS report. Upon completion of the revised
hydraulic analyses, revisions to the FIRM and FIS reports would be warranted.
Detailed application and certification forms must be used for requesting final map revisions.
Therefore, when the map revision request for the area covered by this letter is submitted, please
include the following forms, which may be accessed at http://www.fema.govimedia-
librarylassets/documents/1343.
o Form 1, entitled "Overview and Concurrence Form."
o Form 2, entitled "Riverine Hydrology and Hydraulics Form" Hydraulic analyses of the
base flood, the 10 -percent, 2 -percent, and 0.2 percent annual chance floods, and the
regulatory floodway, must be submitted with Form 2.
A certified topographic work map showing the revised and effective base floodplain boundaries.
Please ensure that the revised information ties -in with the current effective information at the
downstream and upstream ends of the revised reach.
An annotated copy of the FIRM, at the scale of the effective FIRM, that shows the revised base
floodplain boundary delineations shown on the submitted work map and how they tie-in to the
base floodplain boundary delineations shown on the current effective FIRM at the downstream and
upstream ends of the revised reach.
Documentation of the Legal notices sent to property owners who will be affected by any widening
or shifting of the base floodplain or any Base Flood Elevation(BFE) establishment along South
Platte River.
FEMA's fee schedule for reviewing and processing requests for conditional and final modifications to
published flood information and maps may be accessed at https://www.fema.gov/forms-documents-
and-softw=are/flood-map-related-fees. The fee at the time of the map revision submittal must be
received before we can begin processing the request. Payment of this fee can be made with a check or
money order, made payable in U.S. funds to the National Flood Insurance Program, or by credit card
(Visa or MasterCard only). Please either forward the payment, along with the revision application, to
the following address:
LOMC Clearinghouse
Attention: LOMR Manager
847 South Pickett Street
Alexandria, Virginia 22304
or submit the LOMR using the Online LOMC portal at:
https://hazards.fema.gov/femaportal/onlinelomcisin in.
After receiving appropriate documentation to show that the hydraulic analysis for South Platte River has
been completed. FEMA will initiate a revision to the FIRM and FIS report.
This CLOMR is based on minimum floodplain management criteria established under the NFIP. Your
community is responsible for approving all floodplain development, and for ensuring that all necessary
permits required by Federal or State/Commonwealth law have been received. State, county, and
community officials, based on knowledge of local conditions and in the interest of safety, may set higher
standards for construction in the Special Flood Hazard Area. If the State, county, or community has
adopted more restrictive or comprehensive floodplain management criteria, these criteria take precedence
over the minimum NFIP criteria.
If you have general questions about your request, FEMA policy, or the NFIP, please contact the FEMA
Map Information eXchange (FMIX) toll free, at 1-877-FEMA MAP (1-877-336-2627). If you have
specific questions concerning your request, please contact Mr. David Sutley, either by telephone at (303)
235-4809 or by e-mail at David.Sutley@fema.dhs.gov.
Sincerely,
Patrick "Rick" F. Sacbibit, P.E., Branch Chief
Engineering Services Branch
Federal Insurance and Mitigation Administration
cc: Mr. Tom Parko, Jr.
Director of Planning Services
Weld County
Mr. Paul Hindman
Urban Drainage & Flood Control District
Dr. Andrew Earles, P.E.
Project Engineer
Wright Water Engineers, Inc.
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