Flood Control - LOMR - Williamson River Ranch - 5/27/2020Federal Emergency Management
CERTIFIED MAIL
RETURN RECEIPT REQUESTED
The Honorable Jason Pierce
Mayor, City of Eagle
City Hall
660 East Civic Lane
Eagle, ID 83616
Dear Mayor Pierce:
Washington, D.C. 20472
May 15, 2020
1
Fits: i �s
IN REPLY REFER TO:
Case No.:
19-10-0717P
Community Name:
City of Eagle, ID
Community No.:
160003
Effective Date of
This Revision:
September 25, 2020
The Flood Insurance Study Report and Flood Insurance Rate Map for your community have been revised by this
Letter of Map Revision (LOMR). Please use the enclosed annotated map panel(s) revised by this LOMR for
floodplain management purposes and for all flood insurance policies and renewals issued in your community.
Additional documents are enclosed which provide information regarding this LOMR. Please see the List of
Enclosures below to determine which documents are included. Other attachments specific to this request may be
included as referenced in the Determination Document. If you have any questions regarding floodplain management
regulations for your community or the National Flood Insurance Program (NFIP) in general, please contact the
Consultation Coordination Officer for your community. If you have any technical questions regarding this LOMR,
please contact the Director, Mitigation Division of the Department of Homeland Security's Federal Emergency
Management Agency (FEMA) in Bothell, Washington, at (425) 487-4682, or the FEMA Mapping and Insurance
eXchange toll free at 1-877-336-2627 (1 -877 -FEMA MAP). Additional niformation about the NFIP is available on
our website at http://www.fema.gov/business/nfip.
Sincerely,
��
I
Patrick "Rick" F. Sacbibit, P.E., Branch Chief
Engineering Services Branch
Federal Insurance and Mitigation Administration
List of Enclosures:
Letter of Map Revision Determination Document
Annotated Flood Insurance Rate Map
Annotated Flood Insurance Study Report
cc: The Honorable Kendra Kenyon
Chan, Board of Ada County Commissioners
Mr. Mike Williams
Planner III & Floodplain Coordinator
City of Eagle
Mr. Jason Boal
Community Planning Manager
Ada County
Ms. Maureen O'Shea, CFM
State NFIP Coordinator
Idaho Department of Water Resources
Mr. Karl Gebhardt, P.E., P.H.
Hydrologist/Environmental Engineer
Resource Systems, Inc.
Ms. Kerstin Dettrich
Project Manager
The Land Group
Mr. Tucker Johnson
Green Village Development
Page 1 of 6
Issue Date: May 15, 2020
Effective Date: September 25, 2020 Case No.: 19-10-0717P LOMB -APP
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Federal Emergency Management Agency
Washington, D.C. 20472
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LETTER OF MAP REVISION
DETERMINATION DOCUMENT
COMMUNITY AND REVISION INFORMATION
PROJECT DESCRIPTION
BASIS OF REQUEST
FILL
FLOODWAY
City of Eagle
HYDRAULIC ANALYSIS
Ada County
UPDATED TOPOGRAPHIC DATA
Idaho
COMMUNITY
COMMUNITY NO.: 160003
IDENTIFIER
Williamson River Ranch Subdivision - Phase 1 & 2
APPROXIMATE LATITUDE & LONGITUDE: 43.681, -116.329
SOURCE: Other DATUM: NAD 83
ANNOTATED MAPPING ENCLOSURES
ANNOTATED STUDY ENCLOSURES
TYPE: FIRM* NO.: 16001CO153J DATE: June 19, 2020
DATE OF EFFECTIVE FLOOD INSURANCE STUDY: June 19, 2020
TYPE: FIRM NO.: 16001CO154J DATE: June 19, 2020
PROFILE(S)- 05P
TYPE: FIRM NO.: 16001CO161J DATE: June 19, 2020
FLOODWAY DATA TABLE: 3
TYPE: FIRM NO.: 16001CO162J DATE: June 19, 2020
Enclosures reflect changes to flooding sources affected by this revision.
* FIRM - Flood Insurance Rate Map
FLOODING SOURCE(S) & REVISED REACH(ES)
Boise River - From approximately 9,000 feet upstream of Eagle Road to approximately 2,650 feet upstream of Eagle Road
SUMMARY OF REVISIONS
Flooding Source Effective Flooding Revised Flooding Increases Decreases
Boise River Zone AE Zone AE YES YES
BFEs* BFEs YES YES
Zone X (shaded) Zone X (shaded) YES YES
Zone X (unshaded) Zone X (unshaded) YES YES
* BFEs - Base Flood Elevations
DETERMINATION
This document provides the determination from the Department of Homeland Security's Federal Emergency Management Agency (FEMA)
regarding a request for a Letter of Map Revision (LOMR) for the area described above. Using the information submitted, we have determined that
a revision to the flood hazards depicted in the Flood Insurance Study (FIS) report and/or National Flood Insurance Program (NFIP) map is
warranted. This document revises the effective NFIP map, as indicated in the attached documentation. Please use the enclosed annotated map
panels revised by this LOMR for floodplain management purposes and for all flood insurance policies and renewals in your community.
This determination is based on the flood data presently available. The enclosed documents provide additional information regarding this determination. If you have any
questions about this document, please contact the FEMA Mapping and Insurance eXchange toll free at 1-877-336-2627 (1 -877 -FEMA MAP) or by letter addressed to the LOMC
Clearinghouse, 3601 Eisenhower Avenue, Suite 500, Alexandria, VA 22304-6426, Additional Information about the NFIP is available on our website at http://www.fema.gov/nfip.
6:V-1�0
Patrick "Rick" F. Sacbibit, P.E., Branch Chief
Engineering Services Branch
Federal Insurance and Mitigation Administration 19-10-0717P 102 -1 -A -C
Page 2 of 6 Issue Date: May 15, 2020 Effective Date: September 25, 2020 Case No.: 19-10-0717P LOMB-APP
Federal Emergency Management Agency
�'r , v 4 Washington, D.C. 20472
AND S
LETTER OF MAP REVISION
DETERMINATION DOCUMENT (CONTINUED)
OTHER FLOODING SOURCES AFFECTED BY THIS REVISION
FLOODING SOURCE(S) & REVISED REACHES)
Boise River - From approximately 9,000 feet upstream of Eagle Road to approximately 2,650 feet upstream of Eagle Road
SUMMARY OF REVISIONS
Flooding Source Effective Flooding Revised Flooding Increases Decreases
Boise River Floodwav Floodway YES YES
This determination is based on the flood data presently available. The enclosed documents provide additional information regarding this determination. If you have any
questions about this document, please contact the FEMA Mapping and Insurance eXchange toll free at 1-877-336-2627 (1-877-FEMA MAP) or by letter addressed to the LOMC
Clearinghouse, 3601 Eisenhower Avenue, Suite 500, Alexandria, VA 22304-6426. Additional Information about the NFIP is available on our website at http://www.fema.gov/nfip.
Patrick "Rick" F. Sacbibit, P.E., Branch Chief
Engineering Services Branch
Federal Insurance and Mitigation Administration 19-10-0717P 102-1-A-C
I Page 3 of 6 1 Issue Date: May 15, 2020 1 Effective Date: September 25, 2020 1 Case No.: 19-10-0717P I LOMR-APP I
pt AIR a/
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Federal Emergency Management Agency
° 4 Washington, D.C. 20472
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LETTER OF MAP REVISION
DETERMINATION DOCUMENT (CONTINUED)
OTHER COMMUNITIES AFFECTED BY THIS REVISION
CID Number:
160001
Name: Unincorporated Areas of Ada County, Idaho
AFFECTED MAP PANELS
AFFECTED PORTIONS OF THE FLOOD INSURANCE STUDY REPORT
TYPE:
FIRM
NO.:
16001CO153J
DATE:
June 19, 2020
DATE OF EFFECTIVE FLOOD INSURANCE STUDY: June 19, 2020
TYPE:
FIRM
NO.;
16001CO154J
DATE:
June 19, 2020
PROFILE(S): 05P
TYPE
FIRM
NO.:
16001CO161J
DATE:
June 19, 2020
FLOODWAY DATA TABLE: 3
TYPE:
FRM
NO.:
16001CO162J
DATE:
June 19, 2020
This determination is based on the flood data presently available. The enclosed documents provide additional information regarding this determination. If you have any
questions about this document, please contact the FEMA Mapping and Insurance eXchange toll free at 1-877-336-2627 (1 -877 -FEMA MAP) or by letter addressed to the LOMC
Clearinghouse, 3601 Eisenhower Avenue, Suite 500, Alexandria, VA 22304-6426, Additional Information about the NFIP is available on our website at http://www.fema.gov/nfip.
Patrick "Rick" F. Sacbibit, P.E., Branch Chief
Engineering Services Branch
Federal Insurance and Mitigation Administration 19-10-0717P 102 -1 -A -C
Page 4 of 6 1 Issue Date: May 15, 2020 1 Effective Date: September 25, 2020 1 Case No.: 19-10-0717P I LOMB -APP
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Federal Emergency Management Agency
Washington, D.C. 20472
LETTER OF MAP REVISION
DETERMINATION DOCUMENT (CONTINUED)
COMMUNITY INFORMATION
APPLICABLE NFIP REGULATIONS/COMMUNITY OBLIGATION
We have made this determination pursuant to Section 206 of the Flood Disaster Protection Act of 1973 (P.L. 93-234) and in accordance
with the National Flood Insurance Act of 1968, as amended (Title XIII of the Housing and Urban Development Act of 1968, P.L. 90-448),
42 U.S.C. 4001-4128, and 44 CFR Part 65. Pursuant to Section 1361 of the National Flood Insurance Act of 1968, as amended,
communities participating in the NFIP are required to adopt and enforce floodplain management regulations that meet or exceed NFIP
criteria. These criteria, including adoption of the FIS report and FIRM, and the modifications made by this LOMR, are the minimum
requirements for continued NFIP participation and do not supersede more stringent State/Commonwealth or local requirements to which
the regulations apply.
We provide the floodway designation to your community as a tool to regulate floodplain development. Therefore, the floodway revision
we have described in this letter, while acceptable to us, must also be acceptable to your community and adopted by appropriate
community action, as specified in Paragraph 60.3(d) of the NFIP regulations.
COMMUNITY REMINDERS
We based this determination on the 1 -percent -annual -chance flood discharges computed in the FIS for your community without
considering subsequent changes in watershed characteristics that could increase flood discharges. Future development of projects
upstream could cause increased flood discharges, which could cause increased flood hazards. A comprehensive restudy of your
community's flood hazards would consider the cumulative effects of development on flood discharges subsequent to the publication
of the FIS report for your community and could, therefore, establish greater flood hazards in this area.
Your community Hurst regulate all proposed floodplain development and ensure that permits required by Federal and/or
State/Commonwealth law have been obtained. State/Commonwealth or community officials, based on knowledge of local conditions
and in the interest of safety, may set higher standards for construction or may limit development in floodplain areas. If your
State/Commonwealth or community has adopted more restrictive or comprehensive floodplain management criteria, those criteria take
precedence over the minimum NFIP requirements.
We will not print and distribute this LOMR to primary users, such as local insurance agents or mortgage lenders; instead, the community
will serve as a repository for the new data. We encourage you to disseminate the information in this LOMR by preparing a news release
for publication in your community's newspaper that describes the revision and explains how your community will provide the data and
help interpret the NFIP maps. In that way, interested persons, such as property owners, insurance agents, and mortgage lenders, can
benefit from the information.
This revision has met our criteria for removing an area from the I -percent-annual-chance floodplain to reflect the placement of fill.
However, we encourage you to require that the lowest adjacent grade and lowest floor (including basement) of any structure placed within
the subject area be elevated to or above the Base (1 -percent -annual -chance) Flood Elevation.
This determination is based on the flood data presently available. The enclosed documents provide additional information regarding this determination. If you have any
questions about this document, please contact the FEMA Mapping and Insurance exchange toll free at 1-877-336-2627 (1 -877 -FEMA MAP) or by letter addressed to the LOMC
Clearinghouse, 3601 Eisenhower Avenue, Suite 500, Alexandria, VA 22304-6426. Additional Information about the NFIP is available on our website at http://www.fema.gov/nfip.
Patrick "Rick" F. Sacbibit, P,E., Branch Chief
Engineering Services Branch
Federal Insurance and Mitigation Administration 19-10-0717P 102 -1 -A -C
Page 5 of 6 Issue Date: May 15, 2020 Effective Date: September 25, 2020
Case No.: 19-10-0717P
LOMB-APP
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Federal Emergency Management Agency
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LETTER OF MAP REVISION
DETERMINATION DOCUMENT (CONTINUED)
We have designated a Consultation Coordination Officer (CCO) to assist your conununity. The CCO will be the primary liaison between
your community and FEMA. For information regarding your CCO, please contact:
Mr. Mark Carey
Director, Mitigation Division
Federal Emergency Management Agency, Region X
Federal Regional Center
130 228th Street, Southwest
Bothell, WA 98021-8627
(425)487-4682
STATUS OF THE COMMUNITY NFIP MAPS
We will not physically revise and republish the FIRM and FIS report for your community to reflect the modifications made by this LOMR
at this time. When changes to the previously cited FIRM panel(s) and FIS report warrant physical revision and republication in the
future, we will incorporate the modifications made by this LOMR at that time.
This determination is based on the flood data presently available. The enclosed documents provide additional information regarding this determination. If you have any
questions about this document, please contact the FEMA Mapping and Insurance eXchange toll free at 1-877-336-2627 (1-877-FEMA MAP) or by letter addressed to the LOMC
Clearinghouse, 3601 Eisenhower Avenue, Suite 500, Alexandria, VA 22304-6426. Additional Information about the NFIP is available on our website at http://www.fema.gov/nfip,
c7lv--a
Patrick "Rick" F. Sacbibit, P.E., Branch Chief
Engineering Services Branch
Federal Insurance and Mitigation Administration 19-10-0717P 102-1-A-C
Page 6 of 6 Issue Date: May 15, 2020 Effective Date: September 25, 2020 Case No.: 19-10-0717P LOMR-APP
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Federal Emergency Management Agency
Washington, D.C. 20472
LETTER OF MAP REVISION
DETERMINATION DOCUMENT (CONTINUED)
PUBLIC NOTIFICATION OF REVISION
A notice of changes will be published in the Federal Register. This information also will be published in your local newspaper on or
about the dates listed below, and through FEMA's Flood Hazard Mapping website at
htq�s:/hvww.tloodmal?s.fema.gov/llirn;I,>fe status/bfe_main.asp
LOCAL NEWSPAPER Name: Idaho Statesman
Dates: May 21, 2020 and May 28, 2020
Within 90 days of the second publication in the local newspaper, any interested party may request that we reconsider this determination.
Any request for reconsideration must be based on scientific or technical data. Therefore, this letter will be effective only after the 90 -day
appeal period has elapsed and we have resolved any appeals that we receive during this appeal period. Until this LOMR is effective, the
revised flood hazard determination presented in this LOMR may be changed.
This determination is based on the flood data presently available. The enclosed documents provide additional information regarding this determination. If you haveany
questions about this document, please contact the FEMA Mapping and Insurance eXchange toll free at 1-877-336-2627 (1 -877 -FEMA MAP) or by letter addressed to the LOMC
Clearinghouse, 3601 Eisenhower Avenue, Suite 500, Alexandria, VA 22304-6426. Additional Information about the NFIP is available on our website at http://www.fema.gov/nfip.
6� V-10
Patrick "Rick" F. Sacbibit, P.E., Branch Chief
Engineering Services Branch
Federal Insurance and Mitigation Administration 19-10-0717P 102 -1 -A -C
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NOTE: MAP AREA SHOWN ON THIS PANEL IS LOCATED WITHIN
TOWNSHIP 4 NORTH, RANGE 1 EAST.
Ada County
Unincorporated Areas
160001
JOINS PANEL 0153 I 116° 20' 37.5"
43'41' 15"
Profile
Baseline
Without Base Flood Elevation (BFE)
With BFEorDepth
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SPECIAL FLOOD
HAZARD AREAS Regu latory Floodway
HAZARD
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of 1% annual chance flood with average
depth less than one foot orwith drainage
areas of less than one square mile
Future Conditions 1% Annual
Chance Flood Hazard
OTHER AREAS OF 07 01AX Area with Reduced Flood Risk due to Levee
FLOOD HAZARD See Notes. .
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0161 1
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0161 1
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RIVERCHASE
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VFRSION NUMBER
3
2.3.1.1
Q
MAS NUMBER
16001CO16IJ
yk —'
MAP REVISED
v 071.
JUNE 19, 2020