FEMA Flood Maps UpdateMasterpiece on the Mississippi
TO: The Honorable Mayor and City Council Members
FROM: Michael C. Van Milligen, City Manager
SUBJECT: FEMA Correspondence Regarding Dubuque's New Flood Maps
DATE: May 4, 2011
Dubuque
kraal
All-America City
2007
Planning Services Manager Laura Carstens is providing an update on correspondence
from the Federal Emergency Management Agency (FEMA) regarding Dubuque's new
flood maps. The enclosed FEMA correspondence notes the City's statutory 90 -day
appeal period for the preliminary flood maps has ended, the City did appeal, and the
appeal has been resolved.
The City's new flood maps will become effective on October 18, 2011. The City must
amend our local floodplain management regulations to comply with National Flood
Insurance Program (NFIP) requirements by that date. Planning Services staff will review
the City's floodplain management regulations to determine if they meet or exceed the
NFIP requirements, and then prepare the necessary ordinance amendments to
incorporate the new flood maps and any regulatory changes.
Laura recommends that the City Council receive and file the enclosed FEMA
correspondence, and then refer this information to the City Manager.
I concur with the recommendation and respectfully request Mayor and City Council
approval.
Enclosure
cc: Barry Lindahl, City Attorney
Cindy Steinhauser, Assistant City Manager
Laura Carstens, Planning Services Manager
1
Michael C. Van Milligen
F: \USERS \LCARSTEN \WP \FEMA DFRIM \FEMA Correspondence Memo MVM.doc
Masterpiece on the Mississippi
TO: Michael Van Milligen, City Manager
FROM: Laura Carstens, Planning Services Manager'
DATE: May 4, 2011
SUBJECT: FEMA Correspondence Regarding Dubuque's New Flood Maps
Introduction
This memorandum transmits the enclosed correspondence from the Federal
Emergency Management Agency (FEMA) regarding Dubuque's new flood maps.
Dubuque
bfrd
AI- America cily
111111
2007
Background
In 2009, City of Dubuque staff found inaccuracies in the preliminary flood insurance rate
maps that FEMA had prepared for Dubuque, particularly in areas newly designated as
Special Flood Hazard Areas. The City of Dubuque retained an engineering consultant,
CDM, to conduct a detailed analysis of the Bee Branch Creek watershed as part of a
technical appeal filed with FEMA.
In 2010, FEMA decided to accept flood maps revised by the City of Dubuque to
determine which North End areas lie within the 100 year flood plain. The new maps
reflect more accurate information about the flow of storm water and resolve conflicting
data related to base flood elevations. FEMA's decision to use the new maps will save
nearly 1,600 Dubuque households from being required to pay for flood insurance at the
high risk rates.
FEMA has said it will accept the City of Dubuque's data points, improving the accuracy
of the maps for future planning. The result is that only 200 private properties will be
added to Dubuque's North End flood plain rather than the approximately 1,800
properties that would have been added under the initially proposed FEMA maps.
Discussion
The enclosed FEMA correspondence notes the City's statutory 90 -day appeal period for
the preliminary flood maps has ended, the City did appeal, and the appeal has been
resolved.
The City's new flood maps will become effective on October 18, 2011. The City must
amend our local floodplain management regulations to comply with National Flood
Insurance Program (NFIP) requirements by that date.
FEMA Correspondence Regarding Dubuque's New Flood Maps
Page 2
Planning Services staff will review the City's floodplain management regulations to
determine if they meet or exceed the NFIP requirements, and then prepare the
necessary ordinance amendments to incorporate the new flood maps and any
regulatory changes on or before October 18, 2011.
Failure to amend the City regulations will result in the City's suspension from the NFIP.
Letters of Map Change (LOMC) filed by the City and others are summarized in the
FEMA correspondence. These LOMC will be incorporated in the new flood maps.
Once the new flood maps and the accompanying Flood Insurance Study are printed and
distributed, digital files will be made available to the City. These digital files then can be
incorporated into our GIS data base.
Requested Action
The requested action is for the City Council to receive and file the enclosed FEMA
correspondence, and then refer this information to the City Manager.
Enclosure
cc: Kyle Kritz, Associate Planner
F: \USERS \LCARSTEN \WP \FEMA DFRIM \FEMA Flood Maps Memo MVM.doc
Federal Emergency Management Agency
Washington, D.C. 20472
CERTIFIED MAIL IN REPLY REFER TO:
RETURN RECEIPT REQUESTED 19P -A
April 18, 2011
The Honorable Roy Buol
Mayor, City of Dubuque
50 West Thirteenth Street
Dubuque, Iowa 52001
Dear Mayor Buol:
Community: City of Dubuque, IA
Community No.: 195180
Map Panels Affected: See FIRM Index
This is to formally notify you of the final flood elevation determination for the City of Dubuque, Iowa, in
compliance with Title 44, Chapter I, Part 67, Section 67.11, Code of Federal Regulations (CFR). This
section requires that notice of final flood elevations shall be sent to the Chief Executive Officer of the
community, all individual appellants, and the State Coordinating Agency, and shall be published in the
Federal Register.
On April 2, 1971 the Department of Homeland Security's Federal Emergency Management Agency (FEMA)
issued a Flood Insurance Rate Map (FIRM) that identified the Special Flood Hazard Areas (SFHAs), the
areas that would be inundated by the flood having a 1- percent chance of being equaled or exceeded in any
given year (base flood), in your community. Recently, FEMA completed a re- evaluation of flood hazards in
your community. On July 13, 2009, FEMA provided you with Preliminary copies of the FIRM and Flood
Insurance Study (FIS) report that identify existing flood hazards in your community, including Base Flood
Elevations (BFEs). The proposed BFEs for your community were published in the Telegraph Herald, on
May 21, 2010 and May 28, 2010, and in the Federal Register at Part 67, Volume 75, Page 23648, on
May 4, 2010.
The statutory 90 -day appeal period, which was initiated on the second newspaper publication date cited
above, has ended. The proposed BFEs for your community were appealed during that time. All
technical data submitted in support of the appeal have been evaluated, and the appeal has been resolved.
Therefore, the BFEs for your community are considered final. The final rule for BFEs will be published
in the Federal Register as soon as possible. The FIRM for your community will become effective on
October 18, 2011. Before the effective date, FEMA will send you final printed copies of the FIRM
and FIS report.
Because the FIS establishing the BFEs for your community has been completed, certain additional
requirements must be met under Section 1361 of the National Flood Insurance Act of 1968, as
amended, within 6 months from the date of this letter. Prior to October 18, 2011, your community is
required, as a condition of continued eligibility in the National Flood Insurance Program (NFIP), to
adopt or show evidence of adoption of floodplain management regulations that meet the standards of
Paragraph 60.3(d) of the enclosed NFIP regulations (44 CFR 59, etc.) by the effective date of the
FIRM. These standards are the minimum requirements and do not supersede any State or local
requirements of a more stringent nature.
LOMC
Case No.
Issued
I Project Identifier
Old
I Panel
New
I Panel
LOMR -F
09- 07 -0515A
05/07/2009
MINERAL LOT 130 - 1925 PULPIT ROCK LANE
19518000068
19061CO332E
LOMR -F
10- 07 -2121A
11/16/2010
SELCHERT PLACE SUBDIV, LOT 1 - 3290
KENSINGTON PLACE
1951800005B
19061CO351E
LOMB -F
0 8- 07 -0512A
05/13/2008
CALLAHAN PLACE, LOT 1
1905340080B
19061CO332E
LOMC
Case No.
Date
Issued
Project Identifier
Reason Determination
Will be Superseded
New
Panel
NO CASES RECORDED
NO CASES RECORDED
LOMC
Case No.
Date
I sued
Project Identifier
Old
Panel
New
Panel
NO CASES RECORDED
Community: DUBUQUE, CITY OF Community No: 195180
To assist your community in maintaining the Flood Insurance Rate Map (FIRM), we have
summarized below the previously issued Letter of Map Change (LOMC) actions (i.e., Letters of Map
Revision (LOMRs) and Letters of Map Amendment (LOMAs)) that will be affected when the revised
FIRM becomes effective on October 18, 2011.
1. LOMCs Incorporated
The modifications effected by the LOMCs listed below will be reflected on the revised FIRM. In
addition, these LOMCs will remain in effect until the revised FIRM becomes effective.
2. LOMCs Not Incorporated
The modifications effected by the LOMCs listed below will not be reflected on the revised FIRM
panels because of scale limitations or because the LOMC issued had determined that the lot(s) or
structure(s) involved were outside the Special Flood Hazard Area, as shown on the FIRM. These
LOMCs will remain in effect until the revised FIRM becomes effective. These LOMCs will be
revalidated free of charge 1 day after the revised FIRM becomes effective through a single
revalidation letter that reaffirms the validity of the previous LOMCs.
3. LOMCs Superseded
The modifications effected by the LOMCs listed below have not been reflected on the Final revised
FIRM panels because they are being superseded by new detailed flood hazard information or the
information available was not sufficient to make a determination. The reason each is being
superseded is noted below. These LOMCs will no longer be in effect when the revised FIRM
becomes effective.
3/22/2011
FINAL SUMMARY OF MAP ACTIONS
Page 1 of 2
SOMA -2
LOMC
Case No.
Issued
Project Identifier
Old
Panel
New
Panel
NO CASES RECORDED
FINAL SUMMARY OF MAP ACTIONS
SOMA -2
Community: DUBUQUE, CITY OF Community No: 195180
1. Insufficient information available to make a determination.
2. Lowest Adjacent Grade and Lowest Finished Floor are below the proposed Base Flood Elevation.
3. Lowest Ground Elevation is below the proposed Base Flood Elevation.
4. Revised hydrologic and hydraulic analyses.
5. Revised topographic information.
4. LOMCs To Be Redetermined
The LOMCs in Category 2 above will be revalidated through a single revalidation letter that
reaffirms the validity of the determination in the previously issued LOMC. For LOMCs issued for
multiple lots or structures where the determination for one or more of the lots or structures has
changed, the LOMC cannot be revalidated through this administrative process. Therefore, we will
review the data previously submitted for the LOMC requests listed below and issue a new
determination for the affected properties after the effective date of the revised FIRM.
3/22/2011 Page 2 of 2
§ 60.3 Flood plain management criteria for flood -prone areas.
44 Code of Federal Regulations
The Federal Insurance Administrator will provide the data upon which flood plain management regulations shall be
based. If the Federal Insurance Administrator has not provided sufficient data to furnish a basis for these regulations in a
particular community, the community shall obtain, review and reasonably utilize data available from other Federal,
State or other sources pending receipt of data from the Federal Insurance Administrator. However, when special flood
hazard area designations and water surface elevations have been furnished by the Federal Insurance Administrator, they
shall apply. The symbols defining such special flood hazard designations are set forth in §64.3 of this subchapter. In all
cases the minimum requirements governing the adequacy of the flood plain management regulations for flood -prone
areas adopted by a particular community depend on the amount of technical data formally provided to the community
by the Federal Insurance Administrator. Minimum standards for communities are as follows:
(a) When the Federal Insurance Administrator has not defined the special flood hazard areas within a community, has
not provided water surface elevation data, and has not provided sufficient data to identify the floodway or coastal high
hazard area, but the community has indicated the presence of such hazards by submitting an application to participate in
the Program, the community shall:
(1) Require permits for all proposed construction or other development in the community, including the placement of
manufactured homes, so that it may determine whether such construction or other development is proposed within
flood -prone areas;
(2) Review proposed development to assure that all necessary permits have been received from those governmental
agencies from which approval is required by Federal or State law, including section 404 of the Federal Water
Pollution Control Act Amendments of 1972, 33 U.S.C. 1334;
(3) Review all permit applications to determine whether proposed building sites will be reasonably safe from
flooding. If a proposed building site is in a flood -prone area, all new construction and substantial improvements shall
(i) be designed (or modified) and adequately anchored to prevent flotation, collapse, or lateral movement of the
structure resulting from hydrodynamic and hydrostatic loads, including the effects of buoyancy, (ii) be constructed
with materials resistant to flood damage, (iii) be constructed by methods and practices that minimize flood damages,
and (iv) be constructed with electrical, heating, ventilation, plumbing, and air conditioning equipment and other
service facilities that are designed and/or located so as to prevent water from entering or accumulating within the
components during conditions of flooding.
(4) Review subdivision proposals and other proposed new development, including manufactured home parks or
subdivisions, to determine whether such proposals will be reasonably safe from flooding. If a subdivision proposal or
other proposed new development is in a flood -prone area, any such proposals shall be reviewed to assure that (i) all
such proposals are consistent with the need to minimize flood damage within the flood -prone area, (ii) all public
utilities and facilities, such as sewer, gas, electrical, and water systems are located and constructed to minimize or
eliminate flood damage, and (iii) adequate drainage is provided to reduce exposure to flood hazards;
(5) Require within flood -prone areas new and replacement water supply systems to be designed to minimize or
eliminate infiltration of flood waters into the systems; and
(6) Require within flood -prone areas (i) new and replacement sanitary sewage systems to be designed to minimize or
eliminate infiltration of flood waters into the systems and discharges from the systems into flood waters and (ii)
onsite waste disposal systems to be located to avoid impairment to them or contamination from them during flooding.
(b) When the Federal Insurance Administrator has designated areas of special flood hazards (A zones) by the
publication of a community's FHBM or FIRM, but has neither produced water surface elevation data nor identified a
floodway or coastal high hazard area, the community shall
(1) Require permits for all proposed construction and other developments including the placement of manufactured
homes, within Zone A on the community's FHBM or FIRM;
(2) Require the application of the standards in paragraphs (a) (2), (3), (4), (5) and (6) of this section to development
within Zone A on the community's FHBM or FIRM;
[41 FR 46975, Oct. 26, 1976] http: / /ecfr.gooaccess.gov Accessed July 20, 2009.
44 Code of Federal Regulations
(3) Require that all new subdivision proposals and other proposed developments (including proposals for
manufactured home parks and subdivisions) greater than 50 lots or 5 acres, whichever is the lesser, include within
such proposals base flood elevation data;
(4) Obtain, review and reasonably utilize any base flood elevation and floodway data available from a Federal, State,
or other source, including data developed pursuant to paragraph (b)(3) of this section, as criteria for requiring that
new construction, substantial improvements, or other development in Zone A on the community's FHBM or FIRM
meet the standards in paragraphs (c)(2), (c)(3), (c)(5), (c)(6), (c)(12), (c)(14), (d)(2) and (d)(3) of this section;
(5) Where base flood elevation data are utilized, within Zone A on the community's FHBM or FIRM:
(i) Obtain the elevation (in relation to mean sea level) of the lowest floor (including basement) of all new and
substantially improved structures, and
(ii) Obtain, if the structure has been floodproofed in accordance with paragraph (c)(3)(ii) of this section, the elevation
(in relation to mean sea level) to which the structure was floodproofed, and
(iii) Maintain a record of all such information with the official designated by the community under §59.22 (a)(9)(iii);
(6) Notify, in riverine situations, adjacent communities and the State Coordinating Office prior to any alteration or
relocation of a watercourse, and submit copies of such notifications to the Federal Insurance Administrator;
(7) Assure that the flood carrying capacity within the altered or relocated portion of any watercourse is maintained;
(8) Require that all manufactured homes to be placed within Zone A on a community's FHBM or FIRM shall be
installed using methods and practices which minimize flood damage. For the purposes of this requirement,
manufactured homes must be elevated and anchored to resist flotation, collapse, or lateral movement. Methods of
anchoring may include, but are not to be limited to, use of over - the -top or frame ties to ground anchors. This
requirement is in addition to applicable State and local anchoring requirements for resisting wind forces.
(c) When the Federal Insurance Administrator has provided a notice of final flood elevations for one or more special
flood hazard areas on the community's FIRM and, if appropriate, has designated other special flood hazard areas
without base flood elevations on the community's FIRM, but has not identified a regulatory floodway or coastal high
hazard area, the community shall:
(1) Require the standards of paragraph (b) of this section within all Al -30 zones, AE zones, A zones, All zones, and
AO zones, on the community's FIRM;
(2) Require that all new construction and substantial improvements of residential structures within Zones Al -30, AE
and AH zones on the community's FIRM have the lowest floor (including basement) elevated to or above the base
flood level, unless the community is granted an exception by the Federal Insurance Administrator for the allowance of
basements in accordance with §60.6 (b) or (c);
(3) Require that all new construction and substantial improvements of non - residential structures within Zones A1-30,
AE and All zones on the community's firm (i) have the lowest floor (including basement) elevated to or above the
base flood level or, (ii) together with attendant utility and sanitary facilities, be designed so that below the base flood
level the structure is watertight with walls substantially impermeable to the passage of water and with structural
components having the capability of resisting hydrostatic and hydrodynamic loads and effects of buoyancy;
(4) Provide that where a non - residential structure is intended to be made watertight below the base flood level, (i) a
registered professional engineer or architect shall develop and/or review structural design, specifications, and plans
for the construction, and shall certify that the design and methods of construction are in accordance with accepted
standards of practice for meeting the applicable provisions of paragraph (c)(3)(ii) or (c)(8)(ii) of this section, and (ii) a
record of such certificates which includes the specific elevation (in relation to mean sea level) to which such
structures are floodproofed shall be maintained with the official designated by the community under §59.22(a)(9)(iii);
(5) Require, for all new construction and substantial improvements, that fully enclosed areas below the lowest floor
that are usable solely for parking of vehicles, building access or storage in an area other than a basement and which
are subject to flooding shall be designed to automatically equalize hydrostatic flood forces on exterior walls by
allowing for the entry and exit of floodwaters. Designs for meeting this requirement must either be certified by a
registered professional engineer or architect or meet or exceed the following minimum criteria: A minimum of two
openings having a total net area of not less than one square inch for every square foot of enclosed area subject to
[41 FR 46975, Oct. 26, 1976] http: / /ecfr.gpoaccess.gov Accessed July 20, 2009.
44 Code of Federal Regulations
flooding shall be provided. The bottom of all openings shall be no higher than one foot above grade. Openings may
be equipped with screens, louvers, valves, or other coverings or devices provided that they permit the automatic entry
and exit of floodwaters.
(6) Require that manufactured homes that are placed or substantially improved within Zones A1-30, All, and AE on
the community's FIRM on sites
(i) Outside of a manufactured home park or subdivision,
(ii) In a new manufactured home park or subdivision,
(iii) In an expansion to an existing manufactured home park or subdivision, or
(iv) In an existing manufactured home park or subdivision on which a manufactured home has incurred "substantial
damage" as the result of a flood, be elevated on a permanent foundation such that the lowest floor of the
manufactured home is elevated to or above the base flood elevation and be securely anchored to an adequately
anchored foundation system to resist floatation collapse and lateral movement.
(7) Require within any AO zone on the community's FIRM that all new construction and substantial improvements of
residential structures have the lowest floor (including basement) elevated above the highest adjacent grade at least as
high as the depth number specified in feet on the community's FIRM (at least two feet if no depth number is
specified);
(8) Require within any AO zone on the community's FIRM that all new construction and substantial improvements of
nonresidential structures (i) have the lowest floor (including basement) elevated above the highest adjacent grade at
least as high as the depth number specified in feet on the community's FIRM (at least two feet if no depth number is
specified), or (ii) together with attendant utility and sanitary facilities be completely floodproofed to that level to meet
the floodproofmg standard specified in §60.3(c)(3)(ii);
(9) Require within any A99 zones on a community's FIRM the standards of paragraphs (a)(1) through (a)(4)(i) and
(b)(5) through (b)(9) of this section;
(10) Require until a regulatory floodway is designated, that no new construction, substantial improvements, or other
development (including fill) shall be permitted within Zones A1-30 and AE on the community's FIRM, unless it is
demonstrated that the cumulative effect of the proposed development, when combined with all other existing and
anticipated development, will not increase the water surface elevation of the base flood more than one foot at any
point within the community.
(11) Require within Zones AH and AO, adequate drainage paths around structures on slopes, to guide floodwaters
around and away from proposed structures.
(12) Require that manufactured homes to be placed or substantially improved on sites in an existing manufactured
home park or subdivision within Zones A -1 -30, AH, and AE on the community's FIRM that are not subject to the
provisions of paragraph (c)(6) of this section be elevated so that either
(i) The lowest floor of the manufactured home is at or above the base flood elevation, or
(ii) The manufactured home chassis is supported by reinforced piers or other foundation elements of at least
equivalent strength that are no less than 36 inches in height above grade and be securely anchored to an adequately
anchored foundation system to resist floatation, collapse, and lateral movement.
(13) Notwithstanding any other provisions of §60.3, a community may approve certain development in Zones Al -30,
AE, and AH, on the community's FIRM which increase the water surface elevation of the base flood by more than
one foot, provided that the community first applies for a conditional FIRM revision, fulfills the requirements for such
a revision as established under the provisions of §65.12, and receives the approval of the Federal Insurance
Administrator.
(14) Require that recreational vehicles placed on sites within Zones A1-30, AH, and AE on the community's FIRM
either
(i) Be on the site for fewer than 180 consecutive days,
(ii) Be fully licensed and ready for highway use, or
[41 FR 46975, Oct. 26, 1976] http: / /ecfr.gpoaccess.gov Accessed July 20, 2009.
44 Code of Federal Regulations
(iii) Meet the permit requirements of paragraph (b)(1) of this section and the elevation and anchoring requirements for
"manufactured homes" in paragraph (c)(6) of this section.
A recreational vehicle is ready for highway use if it is on its wheels or jacking system, is attached to the site only by
quick disconnect type utilities and security devices, and has no permanently attached additions.
(d) When the Federal Insurance Administrator has provided a notice of final base flood elevations within Zones Al -30
and/or AE on the community's FIRM and, if appropriate, has designated AO zones, AH zones, A99 zones, and A zones
on the community's FIRM, and has provided data from which the community shall designate its regulatory floodway,
the community shall:
(1) Meet the requirements of paragraphs (c) (1) through (14) of this section;
(2) Select and adopt a regulatory floodway based on the principle that the area chosen for the regulatory floodway
must be designed to carry the waters of the base flood, without increasing the water surface elevation of that flood
more than one foot at any point;
(3) Prohibit encroachments, including fill, new construction, substantial improvements, and other development within
the adopted regulatory floodway unless it has been demonstrated through hydrologic and hydraulic analyses
performed in accordance with standard engineering practice that the proposed encroachment would not result in any
increase in flood levels within the community during the occurrence of the base flood discharge;
(4) Notwithstanding any other provisions of §60.3, a community may permit encroachments within the adopted
regulatory floodway that would result in an increase in base flood elevations, provided that the community first
applies for a conditional FIRM and floodway revision, fulfills the requirements for such revisions as established
under the provisions of §65.12, and receives the approval of the Federal Insurance Administrator.
(e) When the Federal Insurance Administrator has provided a notice of final base flood elevations within Zones A1-30
and/or AE on the community's FIRM and, if appropriate, has designated AH zones, AO zones, A99 zones, and A zones
on the community's FIRM, and has identified on the community's FIRM coastal high hazard areas by designating Zones
V1-30, VE, and/or V, the community shall:
(1) Meet the requirements of paragraphs (c)(1) through (14) of this section;
(2) Within Zones V1-30, VE, and V on a community's FIRM, (i ) obtain the elevation (in relation to mean sea level)
of the bottom of the lowest structural member of the lowest floor (excluding pilings and columns) of all new and
substantially improved structures, and whether or not such structures contain a basement, and (ii) maintain a record of
all such information with the official designated by the community under §59.22(a)(9)(iii);
(3) Provide that all new construction within Zones V1-30, VE, and V on the community's FIRM is located landward
of the reach of mean high tide;
(4) Provide that all new construction and substantial improvements in Zones V1-30 and VE, and also Zone V if base
flood elevation data is available, on the community's FIRM, are elevated on pilings and columns so that (i) the bottom
of the lowest horizontal structural member of the lowest floor (excluding the pilings or columns) is elevated to or
above the base flood level; and (ii) the pile or column foundation and structure attached thereto is anchored to resist
flotation, collapse and lateral movement due to the effects of wind and water loads acting simultaneously on all
building components. Water loading values used shall be those associated with the base flood. Wind loading values
used shall be those required by applicable State or local building standards. A registered professional engineer or
architect shall develop or review the structural design, specifications and plans for the construction, and shall certify
that the design and methods of construction to be used are in accordance with accepted standards of practice for
meeting the provisions of paragraphs (e)(4) (i) and (ii) of this section.
(5) Provide that all new construction and substantial improvements within Zones V1-30, VE, and V on the
community's FIRM have the space below the lowest floor either free of obstruction or constructed with non-
supporting breakaway walls, open wood lattice -work, or insect screening intended to collapse under wind and water
loads without causing collapse, displacement, or other structural damage to the elevated portion of the building or
supporting foundation system. For the purposes of this section, a breakway wall shall have a design safe loading
resistance of not less than 10 and no more than 20 pounds per square foot. Use of breakway walls which exceed a
design safe loading resistance of 20 pounds per square foot (either by design or when so required by local or State
[41 FR 46975, Oct. 26, 1976] http: / /ecfr.gpoaccess.gov Accessed July 20, 2009.
44 Code of Federal Regulations
codes) may be permitted only if a registered professional engineer or architect certifies that the designs proposed meet
the following conditions:
(i) Breakaway wall collapse shall result from a water load less than that which would occur during the base flood;
and,
(ii) The elevated portion of the building and supporting foundation system shall not be subject to collapse,
displacement, or other structural damage due to the effects of wind and water loads acting simultaneously on all
building components (structural and non - structural). Water loading values used shall be those associated with the base
flood. Wind loading values used shall be those required by applicable State or local building standards.
Such enclosed space shall be useable solely for parking of vehicles, building access, or storage.
(6) Prohibit the use of fill for structural support of buildings within Zones V1-30, VE, and V on the community's
FIRM;
(7) Prohibit man -made alteration of sand dunes and mangrove stands within Zones V 1 -30, VE, and V on the
community's FIRM which would increase potential flood damage.
(8) Require that manufactured homes placed or substantially improved within Zones V1 -30, V, and VE on the
community's FIRM on sites
(i) Outside of a manufactured home park or subdivision,
(ii) In a new manufactured home park or subdivision,
(iii) In an expansion to an existing manufactured home park or subdivision, or
(iv) In an existing manufactured home park or subdivision on which a manufactured home has incurred "substantial
damage" as the result of a flood, meet the standards of paragraphs (e)(2) through (7) of this section and that
manufactured homes placed or substantially improved on other sites in an existing manufactured home park or
subdivision within Zones VI -30, V, and VE on the community's FIRM meet the requirements of paragraph (c)(12) of
this section.
(9) Require that recreational vehicles placed on sites within Zones V1 -30, V, and VE on the community's FIRM
either
(i) Be on the site for fewer than 180 consecutive days,
(ii) Be fully licensed and ready for highway use, or
(iii) Meet the requirements in paragraphs (b)(1) and (e) (2) through (7) of this section.
A recreational vehicle is ready for highway use if it is on its wheels or jacking system, is attached to the site only by
quick disconnect type utilities and security devices, and has no permanently attached additions.
(f) When the Federal Insurance Administrator has provided a notice of final base flood elevations within Zones Al -30
or AE on the community's FIRM, and, if appropriate, has designated AH zones, AO zones, A99 zones, and A zones on
the community's FIRM, and has identified flood protection restoration areas by designating Zones AR, AR/A1 -30,
AR/AE, AR/AH, AR/AO, or AR/A, the community shall:
(1) Meet the requirements of paragraphs (c)(1) through (14) and (d)(1) through (4) of this section.
(2) Adopt the official map or legal description of those areas within Zones AR, AR/A1 -30, AR/AE, ARIAH, AR/A,
or AR/AO that are designated developed areas as defined in §59.1 in accordance with the eligibility procedures under
§65.14.
(3) For all new construction of structures in areas within Zone AR that are designated as developed areas and in other
areas within Zone AR where the AR flood depth is 5 feet or less:
(i) Determine the lower of either the AR base flood elevation or the elevation that is 3 feet above highest adjacent
grade; and
(ii) Using this elevation, require the standards of paragraphs (c)(1) through (14) of this section.
[41 FR 46975, Oct. 26, 1976] http: / /ecfr.gnoaccess.gov Accessed July 20, 2009.
44 Code of Federal Regulations
(4) For all new construction of structures in those areas within Zone AR that are not designated as developed areas
where the AR flood depth is greater than 5 feet:
(i) Determine the AR base flood elevation; and
(ii) Using that elevation require the standards of paragraphs (c)(1) through (14) of this section.
(5) For all new construction of structures in areas within Zone AR/A1-30, AR/AE, AR/AH, AR/AO, and AR/A:
(i) Determine the applicable elevation for Zone AR from paragraphs (a)(3) and (4) of this section;
(ii) Determine the base flood elevation or flood depth for the underlying Al -30, AE, AH, AO and A Zone; and
(iii) Using the higher elevation from paragraphs (a)(5)(i) and (ii) of this section require the standards of paragraphs
(c)(1) through (14) of this section.
(6) For all substantial improvements to existing construction within Zones AR/A1-30, AR/AE, AR/AH, AR/AO, and
AR/A:
(i) Determine the Al -30 or AE, AH, AO, or A Zone base flood elevation; and
(ii) Using this elevation apply the requirements of paragraphs (c)(1) through (14) of this section.
(7) Notify the permit applicant that the area has been designated as an AR, AR/A1-30, AR/AE, AR/AH, AR/AO, or
AR/A Zone and whether the structure will be elevated or protected to or above the AR base flood elevation.
[41 FR 46975, Oct. 26, 1976] http: / /ecfr.gpoaccess.gov Accessed July 20, 2009.
3
The FIRM panels have been computer - generated. Once the FIRM and FIS report are printed and
distributed, the digital files containing the flood hazard data for the entire county can be provided to your
community for use in a computer mapping system. These files can be used in conjunction with other
thematic data for floodplain management purposes, insurance purchase and rating requirements, and many
other planning applications. Copies of the digital files or paper copies of the FIRM panels may be
obtained by calling our FEMA Map Information eXchange (FMIX), toll free, at 1- 877 -FEMA MAP
(1- 877 - 336 - 2627). In addition, your community may be eligible for additional credits under our
Community Rating System if you implement your activities using digital mapping files.
If your community is encountering difficulties in enacting the necessary floodplain management measures
required to continue participation in the NFIP, we urge you to call the Director, Federal Insurance and
Mitigation Division of FEMA in Kansas City, Missouri at (816- 283 -7031) for assistance. If you have any
questions concerning mapping issues in general or the enclosed Summary of Map Actions, please call
FMIX at the telephone number shown above. Additional information and resources your community may
find helpful regarding the NFIP and floodplain management, such as The National Flood Insurance
Program Code of Federal Regulations, Answers to Questions About the NFIP, Frequently Asked
Questions Regarding the Effects that Revised Flood Hazards have on Existing Structure, Use of Flood
Insurance Study (FIS) Data as Available Data, and National Flood Insurance Program Elevation
Certificate and Instructions, can be found on our website at http : / /www.floodmaps.fema.gov /Ifd.
Paper copies of these documents may also be obtained by calling FMIX.
Enclosure:
Final Summary of Map Actions
Sincerely,
l am.
Luis Rodriguez, P.E., Chief
Engineering Management Branch
Federal Insurance and Mitigation Administration
cc: Community Map Repository
Laura Carstens, Community Floodplain Administrator /Planning Services Manager, City of Dubuque
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