FEMA_North Catfish Creek Letter of Map RevisionTHE CITY OF
Dui
Masterpiece on the Mississippi
Dubuque
kital
All- America City
II 111!
2012
TO: The Honorable Mayor and City Council Members
FROM: Michael C. Van Milligen, City Manager
SUBJECT: FEMA Correspondence for North Fork of Catfish Creek and Letter of Map
Revision (LOMR)
DATE: January 28, 2013
Planning Services Manager is transmitting an update of the successful North Fork of
Catfish Creek Letter of Map Revision (LOMR) process for the City's flood plain maps
and correspondence from the Federal Emergency Management Agency (FEMA).
htit44
Michael C. Van Milligen
MCVM:jh
Attachment
cc: Barry Lindahl, City Attorney
Cindy Steinhauser, Assistant City Manager
Teri Goodmann, Assistant City Manager
Laura Carstens, Planning Services Manager
Masterpiece on the Mississippi
Dubuque
AlMmericaCiry
1111 �!
2012
TO: Michael Van Milligen, City Manager
FROM: Laura Carstens, Planning Services Manager jC`i
SUBJECT: FEMA Correspondence for North Fork of Catfish Creek and Letter of
Map Revision (LOMR)
DATE: January 28, 2013
INTRODUCTION
The purpose of this memo is to provide you with an update of the successful North Fork
of Catfish Creek Letter of Map Revision (LOMR) process for the City's flood plain maps.
Correspondence from the Federal Emergency Management Agency (FEMA) is
attached.
DISCUSSION
The City of Dubuque and our consultant, CDM Smith, submitted a Letter of Map
Revision (LOMR) to FEMA in July 2011. CDM Smith has been working with FEMA to
correct what City staff feels is a poor representation of the floodplain of the North Fork
of Catfish Creek from the east side of the Northwest Arterial to Earl Drive.
Approximately 100 property owners, as part of the new FEMA floodplain maps adopted
on October 18, 2011, were put into a designated floodplain that had never been in one
before. However, this was an approximate floodplain without base flood elevations.
The City of Dubuque has now received notification from FEMA that the City's flood plain
maps will be revised to reflect the data submitted by the City's consultant, CDM Smith.
The new panels establish base flood elevations and remove approximately 44
properties from the designated flood plain. Of the remaining 56 properties shown as
being in the flood plain, only two structures continue to be shown as being in the actual
flood plain.
The two parcels with their structures in the floodplain are the north apartment building at
Butterfield Apartments, and the house at 3278 Kensington. Prior to the adoption of the
new floodplain maps in October 2011, both these properties were in the 100 -year
floodplain delineated by the 1989 floodplain maps as well.
FEMA Correspondence for North Fork of Catfish
Creek and Letter of Map Revision (LOMR)
January 28, 2013
Page 2
The owners of the other parcels shown in the flood plain can apply for a LOMA -OAS
(Letter of Map Amendment, Out As Shown) or an Elevation Certificate that will negate
the requirement for having flood insurance if they have a mortgage on their home. To
date, Planning Services staff has processed 51 LOMA -OAS requests for Dubuque
citizens at no charge to the property owner. An Elevation Certificate must be completed
by an engineer or land surveyor so there is cost associated with obtaining one.
FEMA has indicated in their correspondence that following the second publication of a
Notice of Changes in the Telegraph Herald, a citizen may request that FEMA reconsider
the proposed changes within 90 days. Therefore, the revised flood plain maps will not
go into effect until the 90 -day appeal period has ended and FEMA has resolved any
appeals they receive during the appeal period. Assuming no appeals are filed with
FEMA, the revised maps will go into effect on May 31, 2013.
Planning Services staff will notify the approximately 100 property owners affected by
these flood map changes. Staff will provide individual assistance on interpreting these
preliminary maps and the FEMA review process for impacted property owners or their
agents.
REQUESTED ACTION
No specific action is requested. Please contact me or Associate Planner Kyle Kritz if
you need additional information. Thank you.
Prepared by Kyle L. Kritz, Associate Planner
Attachment
cc: Teri Goodmann, Assistant City Manager
Gus Psihoyos, City Engineer
Deron Muehring, Civil Engineer
Wally Wernimont, Assistant Planner
f: \users \mrettenb \wp \dfirm \revised flood plain map parcels for n catfish creek lomr 1_28_13.doc
Federal Emergency Management
Washington, D.C. 20472
January 17, 2013
CERTIFIED MAIL
RETURN RECEIPT REQUESTED
The Honorable Roy D. Buol
Mayor, City of Dubuque
50 West 13th Street
Dubuque, IA 52001
Dear Mayor Buol:
A
ECIEOVE ,
cy
JAN 2 5 2013 D
CITY OF DUBUQUE
PLANNING SERVICES DEPARTMENT
IN REPLY REFER TO:
Case No.: 12- 07 -2232P
Community Name: City of Dubuque, IA
Community No.: 195180
Effective Date of
This Revision: May 31, 2013
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 proposes 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 Depai tnient of Homeland Security's Federal Emergency
Management Agency (FEMA) in Kansas City, Missouri, at (816) 283 -7002, or the FEMA Map Information
eXchange (FMIX) 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 /nfip.
Sincerely,
lj
Siamak Esfandiary, Ph.D., P.E., CFM
Program Specialist
Engineering Management 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
Ms. Laura Carstens
Planning Services Manager
City of Dubuque
cc:
Mr. Daniel Lau, P E.
Vice - President
CDM Smith
Mr. Suseri Kumar Gali
Project Manager
CDM Smith
For: Luis Rodriguez, P.E., Chief
Engineering Management Branch
Federal Insurance and Mitigation Administration
Page 1 of 4
Issue Date: January 17, 2013
Effective Date: May 31, 2013
Case No.: 12- 07.2232P
LOMR -APP
� °' Federal
`oe
Emergency Management Agency
Washington, D.C. 20472
fFr4,ND S\'-�
LETTER OF MAP REVISION
DETERMINATION DOCUMENT
COMMUNITY AND REVISION INFORMATION
PROJECT DESCRIPTION
BASIS OF REQUEST
COMMUNITY
City of Dubuque
Dubuque County
Iowa
NO PROJECT
HYDRAULIC ANALYSIS
HYDROLOGIC ANALYSIS
NEW TOPOGRAPHIC DATA
COMMUNITY NO.: 195180
IDENTIFIER
North Fork Catfish Creek
APPROXIMATE LATITUDE & LONGITUDE: 42.503, - 90.724
SOURCE: USGS QUADRANGLE DATUM: NAD 83
ANNOTATED MAPPING ENCLOSURES
ANNOTATED STUDY ENCLOSURES
TYPE: FIRM* NO 19061CO238E DATE: October 18, 2011
NO 19061C0351E DATE: October 18, 2011
NO 19061C0352E DATE: October 18, 2011
DATE OF EFFECTIVE FLOOD INSURANCE STUDY REPORT: October 18, 2011
PROFILES: 37P, 37P(a), AND 37P(b)
SUMMARY OF DISCHARGES TABLE: 2
Enclosures reflect changes to flooding sources affected by this revision.
' FIRM - Flood Insurance Rate Map; " FBFM - Flood Boundary and Floodway Map " "" FHBM - Flood Hazard Boundary Map
FLOODING SOURCE(S) & REVISED REACH(ES)
North Fork Catfish Creek - from approximately 1,350 feet downstream of John F Kennedy Road to approximately 950 feet upstream of Rosemont Street
SUMMARY OF REVISIONS
Flooding Source Effective Flooding Revised Flooding Increases Decreases
North Fork Catfish Creek Zone A Zone AE YES YES
No BFEs" BFEs YES NONE
Zone X (unshaded) Zone AE YES NONE
* 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 (FMIX) 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 /business /ntip. _ j `. I `.,
)_, 111
I
Siamak Esfandiary, Ph.D., P.E., CFM, Program Specialist
Engineering Management Branch
Federal Insurance and Mitigation Administration 132942 PT202.BKR.12072232P.H20 102 -I -A -C
•
Page 2 of 4
Issue Date: January 17, 2013
Effective Date: May 31, 2013
Case No.: 12- 07 -2232P
LOMR -APP
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.
COMMUNITY REMINDERS
We based this determination on the base (1- percent- annual - chance) discharges computed in the submitted hydrologic model. Future
development of projects upstream could cause increased discharges, which could cause increased flood hazards. A comprehensive
restudy of your community's flood hazards would consider the cumulative effects of development on discharges and could, therefore,
indicate that greater flood hazards exist 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.
We will not print and distribute this -LOMB 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 LOIV1R 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 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 (FMIX) 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.femagovibusinessinfip.
Siamak Esfandiary, Ph.D., P.E., CFM, Program Specialist
Engineering Management Branch
Federal Insurance and Mitigation Administration 132942 PT202.BKR.12072232P.H20 102 -I -A -C
Page 3 of 4
Issue Date: January 17, 2013
Effective Date: May 31, 2013
Case No.: 12.07.2232P
LOMR -APP
Federal Emergency Management Agency
Washington, D.C. 20472
LETTER OF MAP REVISION
DETERMINATION DOCUMENT (CONTINUED)
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:
Mr. Robert G. Bissell
Director, Mitigation Division
Federal Emergency Management Agency, Region VII
9221 Ward Parkway, Suite 300
Kansas City, MO 64114 -3372
(816) 283-7002
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 panels 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 (FMIX) 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 /business /nfip.
1 ice\ 1 \
. � 7
Siamak Esfandiary, Ph.D., P.E., CFM, Program Specialist
Engineering Management Branch
Federal Insurance and Mitigation Administration, 132942 PT202.BKR.12072232P.H2O 102 -I -A -C
Page 4 of 4
Issue Date: January 17, 2013
Effective Date: May 31, 2013
Case No.: 12- 07 -2232P
LOMR -APP
Federal Emergency Management Agency
Washington, D.C. 20472
LETTER OF MAP REVISION
DETERMINATION DOCUMENT (CONTINUED)
PUBLIC NOTIFICATION OF REVISION
PUBLIC NOTIFICATION
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/fhm/Scriptsibfe_main.asp.
LOCAL NEWSPAPER Name: The Dubuque Telegraph Herald
Dates: January 24, 2013 and January 31, 2013
Within 90 days of the second publication in the local newspaper, a citizen 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 information presented in this LOMB 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 (FMIX) 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/business /nfip. �}
y
Siamak Esfandiary, Ph.D., P.E., CFM, Program Specialist
Engineering Management Branch
Federal Insurance and Mitigation Administration 132942 PT202.BKR.12072232P.H2O 102 -I -A -C
FLOODING SOURCE AND LOCATION
LITTLE MAQUOKETA RIVER
At mouth
Upstream of confluence with Clcie Branch
- gage No. 4145.00
Upstream of confluence with North Fork Little
Maquoketa River - gage No. 4143.50
Table 2. Summary of Discharges
PEAK DISCHARGES (CFS)
DRAINAGE AREA 1- Percent- 2- Percent- 1- Percent- 0.2- Percent-
(SQUARE MILES) Annual- Chance Annual- Chance Annual- Chance Annual- Chance
157 19,290 33,050 39,870 58,110
130 17,710 30,350 36,610 53,860
54 5,870 8,210 9,170 11 ,270
MIDDLE FORK CATFISH CREEK
Upstream of corporate limits of City of Dubuque 7.2 1,920 3,720 4,770 8,180
MISSISSIPPI RIVER
At Lock & Dam 12
Downstream of Lock & Dam 11
Downstream of Lock & Dam 10
NORTH FORK CATFISH CREEK
At confluence with Middle Fork Catfish Creek
82,400
82,100
79,370
About 910 feet downstream of John F Kennedy Road
196,000
195,000
197,000
252,000
251,000
255,000
275,000 327,000
274,000 326,000
279,000 334,000
4.0 1,370 2,750 3,600 6,400
2.1 1,340
NORTH FORK LITTLE MAQUOKETA RIVER
At confluence with Little Maquoketa River
Just downstream of confluence with Middle Fork
Little Maquoketa River
Just upstream of confluence with Middle Fork Little
Maquoketa River
Upstream study limit -gage No. 4144.50
70
13,410
22,970
27,710
40,390
63.2 12,800 21,940 26,470 38,580 REVISED
DATA
30 4,210 6,640 7,710 10,21
21.6 3,630 5,730 6,650 8,811
NORTH FORK LITTLE MAQUOKETA RIVER TRIBUTARY
At confluence with North Fork Little Maquoketa River 5.3 2,160 3,920 4,800 6,940
About 7,500 feet upstream of confluence with North Fork
Little Maquoketa River 4.1 2,020 3,650 4,470 6,440
NORTH FORK MAQUOKETA RIVER
Approximately 4.6 miles downstream of U.S. Highway 151
at the downstream county boundary 211.7 10,015 15,970 19,090 30,000
About 5,400 feet upstream of Cascade corporate limits 198.3 9,650 15,411 18,423 29,241
Approximately 5 miles downstream of western
county boundary 125.0 8,112 13,181 15,895 25,678
Upstream of Hewitt Creek 44.4 4,591 7,615 9,183 15,107
'Data not available
REVISED TO
REFLECT LOMR
EFFECTIVE: May 31, 2013
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STREAM BED
CROSS SECTION LOCATION
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11,000 11,500 12,000 12,500 13,000 13,500 14,000 14,500
LEGEND
03% ANNUAL CHANCE FLOOD*
1% ANNUAL CHANCE FLOOD
2% ANNUAL CHANCE FLOOD*
10% ANNUAL CHANCEFLODD•
STREAM BED
CROSS SECTION LOCATION
15,000
STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH MIDDLE FORK CATFISH CREEK
15,500
16,000 16,500
• DATA NOT AVAIABLE
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77,000
17,500
STREAM DISTANCE IN FEET ABOVE CONFLUENCE WITH MIDDLE FORK CATFISH CREEK
LEGEND
- 023 ANNUAL CHANCE FLOOD`
1% ANNUAL CHANCE FLOOD
- 2% ANNUAL CHANCE FLOOD'
10% ANNUAL CHANCE FLOOD'
STREAM BED
CROSS SECTION LOCATION
DATA NOT AVAIASLE
800
780
760
740
720
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DERAL EMERGENCY MANAGEM ' 'N
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150
Legend
1% annual chance
(100-Year) Floodplain
1% annual chance
(100-Year) Floodway
I-7 0.2% annual chance
(500-'ear) Floodplain
. ;• • -4
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— 3660000 FT
MAP SCALE 1• = 500'
250 0 500
1 1 1 1 1 1 , FEET
METERS
0 150
PANEL 0238E
FIRM
FLOOD INSURANCE RATE MAP
DUBUQUE COUNTY,
IOWA
AND INCORPORATED AREAS
PANEL 238 OF 550
(SEE MAP INOIXPOR FIRM PANEL LAYOUT)
SE2IVIINSI
commumme .IDMBER PANEL 51.EEL5
W M. =MT nom arla
MOURIUNITa■ mon am
00aUclUNCur Or usIlla tale
REVISED TO
REFLECT LOMR
EFFECTIVE: May 31, 2013
Haft b Us. IT. Mop Num. 01,10
us* on* moporm ..nrrny Nunbar.eren
olunnshaald me on hem,. appilUilus Wino tatt•el
d efillnalari
MAP NUMBER
1906100238E
MAP REVISED
OCTOBER 18, 2011
Pedern1 Emergency Mangonnt Agency
0
a.
JOINS PANEL 0351
FT 151, ANNUAL CHANCE
FLOOD DISCHARGE
CONTAINED IN CULVERT
42'30'00.0"
0043.07.5'
Legend
1% annual chance
(100-Year) Floodplain
1% annual chance
(100 Year) Floodway
0.2% annual chance
(500 Year) Floodplain
MAP SCALE 1" = 500'
250 0 500 EET
METERS
150 0 150
I H H I
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PANEL 0351E
un
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FIRM
FLOOD INSURANCE RATE MAP
DUBUQUE COUNTY,
IOWA
AND INCORPORATED AREAS
PANEL 351 OF 550
(SEE MAP INDEX FOR FIRM PANEL LAYOUT)
CONTAINS:
COMMUNITY NUMBER PANEL. SUFFIX
DUBUQUE
DUBUQUE,
REVISED
REFLECT
EFFECTIVE:
Notion
used when
above
Federal
COUNTY 150534 0351 E
CITY OF 195180 0351 E
TO
LOMR
May 31, 2013
to User. The Map Number shown below should bo
placing map orders; the Community Number shown
should be used on Insurance applications lar the subject
MAP NUMBER
,IF" % 19061C0351E
MAP REVISED
�F1 5E e'` OCTOBER 18, 2011
Emergency Management Agency
637000m E
1% ANNUAL CHANCE
FLOOD DISCHARGE
CONTAINED IN CULVERT
JOINS PANEL 0238
90°43'07.5"
420'00.0"
ZONE AE
North Fork
Catfish Creek
3655000 FT
Legend
1% annual chance
(100 Year) Floodplain
1% annual chance
(100 Year) Floodway
0.2% annual chance
(500 Year) Floodplain
MAP SCALE 1" = 500'
250 0 500 EET
METERS
150 0 150
iii
9043'07.5"
42 '30'00.0"
LIMIT OF
FLOODWAY
JOINS PANEL 0351
JOINS PANEL 0239
6880o0m E
4707000m-is
a
IF
PANEL 0352E
'
FIRM
FLOOD INSURANCE RATE MAP
DUBUQUE COUNTY,
IOWA
AND INCORPORATED AREAS
PANEL 352 OF 550
(SEE MAP INDEX FOR FIRM PANEL LAYOUT)
CONTAINS:.
o
o,,
al
„I
m
C QMMUNITY NUMBER PANEL SUFFIX
DUBUQUE COUNTY 190539 0352 E
DUBUQUE. CITY OF 195180 0352 E
REVISED TO
REFLECT LOMR
EFFECTIVE: May 31, 2013
Notice To User. The Map Number shown below should be
used when placing map orders; the Community Numbershown
above should be used on insurance applications for the subject
community.
E4 ^ MAP NUMBER
9. 19061C0352E
- ; MAP REVISED
gF�gAss s- OCTOBER 18, 2011
Federal Emergency Management Agency
CM
CD
it=,
I
I' I
0nLL4
i I�1-y
TH
1111111
9043'07.5"
42 '30'00.0"
LIMIT OF
FLOODWAY
JOINS PANEL 0351
JOINS PANEL 0239
6880o0m E
4707000m-is