HomeMy WebLinkAbout20170416.tiffFederal Emergency Management Agency
CERTIFIED MAIL
RETURN RECEIPT REQUESTED
The Honorable Mike Freeman
Chairman, Weld County
Board of Commissioners
P. O. Box 758
Greeley, CO 80632
Dear Mr. Freeman:
Washington, D.C. 20472
February 6, 2017
IN REPLY REFER TO:
Case No.:
Follows Conditional
Case No.:
Community Name:
Community No.:
Effective Date of
This Revision:
16-08-0734P
14-08-0841R
Weld County, CO
080266
June 21, 2017
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 panels revised by this LOMR for
floodplain management purposes and for all flood insurance policies and renewals issued in your community.
Additional documents are enclosed that provide information regarding this LOMR. Please see the List of Enclosures
below to determine which documents are included. Other enclosures 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 Denver, Colorado, at (303) 235-4830, or the FEMA Map Information eXchange toll free at
1-877-336-2627 (1-877-FEMA MAP). Additional information about the NFIP is available on our website at
http://www.fema.gov/national-flood-insurance-program.
Sincerely,
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: Mr. Tom Parko, Jr., M. A.
Director of Planning Services
Weld County
Mr. Don Dunker, P.E.
County Engineer
Weld County
Mr. Kenneth C. Robinson, P.E., CMF
Senior Engineer, Water Resources
Atkins
jre C`C>UCi ccx-tiOt)S
S/.9/1
cc tO€c- cRR)
PLcmml TPA
RA) CSR/Jm3
2017-0416
Page 1 of 5
Issue Date: February 6, 2017
Effective Date: June 21, 2017
Case No.: 16-08-0734P
LOMR-APP
Follows Conditional Case No.: 14-08-0841R
g__ T
Federal Emergency Management Agency
Washington, D.C. 20472
LETTER OF MAP REVISION
DETERMINATION DOCUMENT
COMMUNITY AND REVISION INFORMATION
PROJECT DESCRIPTION
BASIS OF REQUEST
COMMUNITY
Weld County
Colorado
(Unincorporated Areas)
BRIDGE
FILL
FLOODWAY •
HYDRAULIC ANALYSIS
UPDATED TOPOGRAPHIC
DATA
COMMUNITY NO.: 080266
IDENTIFIER
Weld County Road 49 Extension (South Platte River)
APPROXIMATE LATITUDE AND LONG TUDE: 40.409, -104.617
SOURCE: USGS QUADRANGLE DATUM: NAD 83
ANNOTATED MAPPING ENCLOSURES
ANNOTATED STUDY ENCLOSURES
TYPE: FIRM* NO.: 0812301542E DATE: January 20, 2016
TYPE: FIRM* NO.: 08123C1544E DATE: January 20, 2016
TYPE: FIRM* NO.: 08123C1561E DATE: January 20, 2016
TYPE: FIRM* NO.: 0812301563E DATE: January 20, 2016
DATE OF EFFECTIVE FLOOD INSURANCE STUDY: January 20, 2016
FLOODWAY DATA TABLE: 5
PROFILES: 102P and 103P
Enclosures reflect changes to flooding sources affected by this revision.
* FIRM - Flood Insurance Rate Map
FLOODING SOURCE AND REVISED REACH See Page 2 for Additional Flooding Sources
South Platte River — from approximately 1,150 feet downstream to 5,530 feet upstream of Weld County Parkway
SUMMARY OF REVISIONS
Flooding Source Effective Flooding Revised Flooding Increases Decreases
South Platte River Zone AE Zone AE YES YES
Zone X (shaded) Zone X (shaded) YES YES
BFEs* BFEs NONE YES
Floodway Floodway 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 Map Information eXchange toll free at 1-877-336-2627 (1-877-FEMA MAP) or by letter addressed to the
LOMC Clearinghouse, 847 South Pickett Street, Alexandria, VA 22304-4605. Additional information about the NFIP is available on our website at
http://www.fema.govinational-flood-insurance-program.
Patrick "Rick" F. Sacbibit, P.E., Branch Chief
Engineering Services Branch
Federal Insurance and Mitigation Administration 16-08-0734P 102 -I -A -C
Page 2 of 5
Issue Date: February 6, 2017
Effective Date: June 21, 2017
Case No.: 16-08-0734P
LOMR-APP
y3R7q
Federal
,Q
Emergency Management Agency
Washington, D.C. 20472
LETTER OF MAP REVISION
DETERMINATION DOCUMENT (CONTINUED)
OTHER FLOODING SOURCES AFFECTED BY THIS REVISION
FLOODING SOURCE AND REVISED REACH
South Platte River — from approximately 1,190 feet downstream to 5,540 feet upstream of 18th Street bridge
SUMMARY OF REVISIONS
Flooding Source Effective Flooding Revised Flooding Increases Decreases
South Platte River Zone AO Zone AO 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 Map Information eXchange toll free at 1-877-336-2627 (1-877-FEMA MAP) or by letter addressed to the
LOMC Clearinghouse, 847 South Pickett Street, Alexandria, VA 22304-4605. Additional information about the NFIP is available on our website at
http://www.fema.govinational-flood-insurance-program.
Patrick "Rick" F. Sacbibit, P.E., Branch Chief
Engineering Services Branch 16-08-0734P 102 -I -A -C
Federal Insurance and Mitigation Administration
Page 3 of 5
Issue Date: February 6, 2017
Effective Date: June 21, 2017
Case No.: 16-08-0734P
LOMR-APP
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Federal Emergency Management Agency
e Washington, D.C. 20472
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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.
NFIP regulations Subparagraph 60.3(b)(7) requires communities to ensure that the flood -carrying capacity within the altered or relocated
portion of any watercourse is maintained. This provision is incorporated into your community's existing floodplain management
ordinances; therefore, responsibility for maintenance of the altered or relocated watercourse, including any related appurtenances such as
bridges, culverts, and other drainage structures, rests with your community. We may request that your community submit a description
and schedule of maintenance activities necessary to ensure this requirement.
COMMUNITY REMINDERS
We based this determination on the 1 -percent -annual -chance flood discharges computed in the F1S 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 must 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.
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 Map Information eXchange toll free at 1-877-336-2627 (1-877-FEMA MAP) or by letter addressed to the
LOMC Clearinghouse, 847 South Pickett Street, Alexandria, VA 22304-4605. Additional information about the NFIP is available on our website at
http://www.fema.gov/national-flood-insurance-program.
Patrick "Rick" F. Sacbibit, P.E., Branch Chief
Engineering Services Branch
Federal Insurance and Mitigation Administration 16-08-0734P 102 -I -A -C
Page 4 of 5
Issue Date: February 6, 2017
Effective Date: June 21, 2017
Case No.: 16-08-0734P
LOMR-APP
_alrT
.�,. tea:
Federal Emergency Management Agency
O� Washington, D.C. 20472
LETTER OF MAP REVISION
DETERMINATION DOCUMENT (CONTINUED)
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.
We have designated a Consultation Coordination Officer (CCO) to assist your community. The CCO will be the primary liaison between
your community and FEMA. For information regarding your CCO, please contact:
Ms. Jeanine D. Petterson
Director, Mitigation Division
Federal Emergency Management Agency, Region VIII
Denver Federal Center, Building 710
P.O. Box 25267
Denver, CO 80225-0267
(303) 235-4830
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 Map Information eXchange toll free at 1-877-336-2627 (1-877-FEMA MAP) or by letter addressed to the
LOMC Clearinghouse, 847 South Pickett Street, Alexandria, VA 22304-4605. Additional information about the NFIP is available on our website at
http://www.fema.govinational-flood-insurance-program.
Patrick "Rick" F. Sacbibit, P.E., Branch Chief
Engineering Services Branch
Federal Insurance and Mitigation Administration 16-08-0734P 102 -I -A -C
Page 5 of 5
Issue Date: February 6, 2017
Effective Date: June 21, 2017
Case No.: 16-08-0734P
LOMR-APP
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Federal
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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
https://www.floodmaps.fema.gov/thm/bfe_status/bfe_main.asp.
LOCAL NEWSPAPER Name: The Greeley Tribune
Dates: February 14, 2017 and February 21, 2017
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 have
any questions about this document, please contact the FEMA Map Information eXchange toll free at 1-877-336-2627 (1-877-FEMA MAP) or by letter addressed to the
LOMC Clearinghouse, 847 South Pickett Street, Alexandria, VA 22304-4605. Additional information about the NFIP is available on our website at
http://www.fema.gov/national-flood-insurance-program.
Patrick "Rick" F. Sacbibit, P.E., Branch Chief
Engineering Services Branch
Federal Insurance and Mitigation Administration 16-08-0734P 102 -I -A -C
FLOODING SOURCE
FLOODWAY
1 -PERCENT -ANNUAL -CHANCE FLOOD
WATER SURFACE ELEVATION
WIDTH
SECTION
AREA
MEAN
VELOCITY
REGULATORY
WITHOUT
WITH
INCREASE
CROSS SECTION
DISTANCE'
(FEET)
(SQUARE
(FEET PER
(FEET NAVD)
FLOODWAY
NAVD)
FLOODWAY
(FEET NAVD)
(FEET)
FEET)
SECOND)
(FEET
SOUTH PLATTE RIVER
A
1,310,630
4.154
18,738
1.9
4,605.4
4,605.4
4,606.2
0.8
B
1.313.200
1,298
7.250
4.3
4,608.9
4,608.9
4,608.9
0.0
C REVISED
1,314,350
1,372
7,724
4.0
4,611.2
4,611.2
4,611.2
0.0
D DATA -II,
1,315,375
679
6,872
5.8
4,612.5
4,612.5
4,612.6
0.1
E
1,315,670
811
8,641
4.7
4,613.2
4,613.2
4,613.3
0.1
F
1,316,815
2,321
11,897
2.7
4,614.2
4,614.2
4,614.3
0.1
G
1,321,535
1,800
8,508
3.8
4,618.0
4,618.0
4,619.0
1.0
H
1,323,460
1,740
7,853
4.1
4,622.4
4,622.4
4,622.4
0.0
I
1,325,960
812
5,780
5.6
4,626.9
4,626.9
4,626.9
0.0
J
1,326,880
810
5,909
5.5
4,626.9
4,626.9
4,626.9
0.0
K
1,326,880
1,200
9,563
3.4
4,628.1
4,628.1
4,628.1
0.0
L
1,328,510
1,295
8,556
3.8
4,629.2
4,629.2
4,629.3
0.1
M
1,329,350
842
5,505
5.9
4,629.9
4,629.9
4,630.3
0.4
N
1,329,600
825
5,587
5.8
4,630.1
4,630.1
4,630.4
0.3
O
1,330,930
2,692
13,231
2.5
4,631.6
4,631.6
4,631.9
0.3
P
1,333,140
2,584
17,421
1.9
4,632.7
4,632.7
4,633.4
0.7
Q
1,334,770
1,585
5,457
6.0
4,634.6
4,634.6
4,635.5
0.9
R
1,337,280
2,227
10,489
3.1
4,639.0
4,639.0
4,639.8
0.8
S
1,339,430
535
4,110
7.9
4,641.3
4,641.3
4,642.3
1.0
T
1,339,530
629
4,511
7.2
4,641.7
4,641.7
4,642.3
0.6
U
1,340,730
1,194
4,518
7.2
4,644.4
4,644.4
4,645.1
0.7
V
1,344,710
1,538
10,944
3.0
4,649.2
4,649.2
4,649.5
0.3
'Feet above Mouth
RFVI.SFfl T(1
-4
r -
01
FEDERAL EMERGENCY MANAGEMENT AGENCY
WELD COUNTY, CO
AND INCORPORATED AREAS
REFLECT LOMR
FLOODWAY DATAEFFECTIVE: June 21, 2017
SOUTH PLATTE RIVER
4620
4615
a
a
4610
Liu
w
IL
z
z
O
¢ 4605
4600
1,314,500
1,315,000
1315,500
1,316,000
1,316,500
1,317,000
1,317,500
1,318,000
1,318,500
1,319,000
1,319,500
1,320,000
1,314,000
STREAM DISTANCE
IN FEET ABOVE MOUTH
O
I --
a
U-,
LU
4620
4615
4610
4605
LEGEND
0.2% ANNUAL CHANCE FLOOD
1% ANNUAL CHANCE FLOOD
2% ANNUAL CHANCE FLOOD
10% ANNUAL CHANCE FLOOD
inW STREAM BED
CROSS SECTION LOCATION
1,320,500
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1,321,500
1,322,000
1,322,500
1,323,000
1,323,500
1,324,000
1,324,500
1,325,000
1,325,500
1,326,000
1,326,500
1,320,500
STREAM DISTANCE IN FEET ABOVE MOUTH
4635
4630
4625
4620
4615
4610
4605
1,327,000
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