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RETURN RECEIPT REQUESTED
IN REPLY REFER TO:
The Honorable Perry Buck Case No.: 24-08-0407R
Chair, Weld County Board of County Commissioners Community: Weld County, CO
1150 O Street Community No.: 080266
Greeley, CO 80631
Federal Emergency Management Agency
Washington, D.C. 20472 RECEIVED
April 7, 2025 APR 14 2025
WELD COUNTY
COMMISSIONERS
104
Dear Chair Buck:
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 community
in accordance with Part 65 of the National Flood Insurance Program (NFIP) regulations. In reference to a
report prepared by Olsson, dated September 2024, Amy Gabor, Olsson, 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 Amy Gabor.
Because this revision request also affects the City of Greeley, Colorado, a separate CLOMR for this
community was issued on the same date as this CLOMR.
Information pertinent to this revision request is listed below.
Identifier:
Flooding Source:
FIRM Panels Affected:
FIRM Panels Affected within the
(City of Greeley):
Sheep Draw Master Drainage Plan
Sheep Draw
08123C1509F, 08123C1512E, 08123C1513E,
and 08123C1517E
08123C1509F, 08123C1512E, 08123C1513E,
08123C0514E, 08123C1516E, and
08123C1517E
We have completed our review of the submitted data and determined that the discharges presented in the
report entitled "Sheep Draw CLOMR," prepared by Olsson, Inc., dated January 2025, 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
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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 https://www.fema.gov/media-
library/assets/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, 4 -percent, 2 -percent, 1 -percent -plus, 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 floodway and 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 and floodway boundary delineations shown on the submitted work map and how they
tie-in to the base floodplain and floodway boundary delineations shown on the current effective
FIRM at the downstream and upstream ends of the revised reach.
A copy of the public notice distributed by your community, stating its intent to revise the
regulatory floodway, or a signed statement by your community that it has notified all affected
property owners and affected adjacent jurisdictions.
• 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)
increases/establishment along Sheep Draw.
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/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
NFIP, or by credit card (Visa or MasterCard only). Please either forward the payment, along with the
revision application, to the following address:
Colorado Water Conservation Board
Attention: Floodplain Mapping Program Manager
1313 Sherman Street, Room 718
Denver, CO 80203
or submit the LOMR using the Online LOMC portal at:
https://hazards.fema.gov/femaportal/onlinelomc/signin.
After receiving appropriate documentation to show that the hydraulic analysis for Sheep Draw 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 (SFHA). 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
Mapping and Insurance eXchange (FMIX) toll free, at 1-877-FEMA MAP (1-877-336-2627). If you have
specific questions concerning your request, please contact Christine Gaynes, either by telephone at
(303) 235-4359 or by e-mail at Christine.Gaynesna,fema.dhs.gov.
Sincerely,
Patrick "Rick" F. Sacbibit, P.E.
Chief, Engineering Services Branch
Risk Analysis, Planning, and Information Directorate I Resilience
cc:
The Honorable John Gates
Mayor, City of Greeley
Dawn Anderson
Development Review Manager
Weld County
Melissa King
Development Review Engineer
Weld County
Amy Gabor, P.E., CFM
Senior Engineer
Olsson
Kevin Houck, P.E., CFM
Chief, Watershed and Flood Protection Section
Colorado Water Conservation Board
Caitlin McDaniel, P.E., CFM
Floodplain Mapping Coordinator
Colorado Water Conservation Board
Marta Blanco Castano, GISP, CFM
Flood Mapping Program Assistant
Colorado Water Conservation Board
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