HomeMy WebLinkAbout~Master - Zoning Text Amendment Updating Chapter 9 Flood Plain Zoning Regulations i
ORDINANCE NO.4535
AN ORDINANCE TO AMEND THE MUNICIPAL CODE OF
THE CITY OF AMES, IOWA, BY AMENDING SECTIONS
9.1.(1), 9.2(2), 9.4 (1)(3)(d), 9.5(2)(d)(k) and 9.7 (1)(b)(ix)
THEREOF, .FOR THE PURPOSE OF AMENDING FLOOD
PLAIN ZONING REGULATIONS REPEALING ANY AND
ALL ORDINANCES OR PARTS OF ORDINANCES IN
CONFLICT TO THE EXTENT OF SUCH CONFLICT; AND
ESTABLISHING AN EFFECTIVE DATE.
BE IT.ENACTED,by the City Council for the City of Ames,Iowa,that:
Section One. The Municipal Code of the City of Ames,Iowa shall be and the same is hereby
amended by amending Sections 9.1(1),9.2(2), 9.4 (1)(3)(d),9.5(2)(d)(k)and 9.7(1)(b)(ix)as follows:
"Sec,9.1.STATUTORY AUTHORIZATION,FINDINGS OF FACT,AND PURPOSE.
(1) Statutory Authorization. The legislature of the State of Iowa has, in Chapter 414 Code of
Iowa, delegated the responsibility to cities to enact zoning regulations to secure safety from flood and to
promote health and the general welfare. The legislature of the State of Iowa has granted jurisdiction to the
Iowa Department of Natural Resources over water and floodplains in Chapter 455B Section 2 of the Code of
Iowa. The Iowa Department of Natural.Resources has delegated authority to local units of government in
Chapter 455.276 of the Iowa Code,
Sec.9.2.GENERAL PROVISIONS.
(2)Establishment of Official Flood Plain Zoning Map. ,Iowa and laeeFperated
Areas-Fileed insura#ee pate Map(FIRM),City ofAmes;The Flood Insurance Rate Maps(FIRMS)for Story
County, Iowa and Incarpor-to Areas. City of Amos, Panels 19169COI35F, 0137G, 0139G, 0141.F.0142F,
0141G,0142G,0143G,0144G,0155F,0161F,0162F,0163G,0164F,0168F,0170F,0256G,0257G,0276F,
0277F,dated January 15 2021,which were prepared as part of the Flood Insurance Study for Story County
and digital FIRM equivalent are hereby adopted by reference and declared to be the Official .Floodplain
Zoning Map.
Sec.9.4. FLOODWAY OVERLAY DISTRICT.
(1)Permitted Uses. The following usesshall be p
the extent the), afe not pr-eliibited by an), other ordiR%nee et- tander-lying zening diSWO FOgU1449",
+he e+ ..,ge of materials oequipffiefit, ed feF pub!i6
'•„ acre}-Al[ development within the Floodway Overlay District shall be permitted to the extent that
they are not prohibited by any other ordinance(or underlying zoning district regulation)and provided they
do not include the placement of structures factory-built homes, fill, obstructions, the storage materials or
equipment,excavation or alternation of a watercourse:
(3) Performance Standards. All Floodway Overlay District development allowed as a Permitted
Development shall meet the following standards:
(d) Structures, buildings, recreational vehicles and sanitary and utility systems, if
permitted,shall meet the applicable performance standards of the Floodway Fringe Overlay District and shall
be constructed or aligned to present the minimum possible resistance to flood flows.
See. 9.5.FLOODWAY FRINGE OVERLAY DISTRICT.
(2) Performance Standards.
(a)All Structures shall
(i)be designed and adequately anchored to prevent flotation,collapse or lateral
movement.
(d) Factory-built homes:
(i) Faetei:y built
parks or- s�E':.. -"-n hi R+4sl4er� , , �i) All new and
substantially improved factory-built homes including those placed in existing factoLy-built home 12arks or
subdivisions, shall be anchored to resist flotation colla se or lat r l mo em nt. Anchorage systems ma
include,but are not limited to, use of over-the--top or frame ties to ground anchors as required by the State
Building Code.
(k)For all new and substantially improved structures:
(i)Fully enclosed areas below the"lowest floor" (not including basements)that
are subject to flooding shall be designed to automatically equalize hydrostatic flood forces on exterior walls
n exit of floodwaters. Desi ns for meeting this requirement must either be
by allowing for the entry and ag g q
f certified by a liseaseEl re ist�professional engineer or meet or exceed the following minimum criteria:
a.A minimum of two(2)openings having a total net area of not less than one
square inch for every square foot of enclosed area subject to flooding shall be provided.
fb.The bottom of all openings shall be no higher than one foot above grade.
c. Openings may be equipped with screens, louvers, valves, or other
j coverings or devices provided,that they permit the automatic entry and exit of floodwaters. Stieh areas sh
E be used solely f:e+-pa potential t,..-age
d All such areas shall be used solely for parking ofvehicles,building,access
! and low damage potential storage.
(i)(ii)New and substantially improved structures must 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.
(4)-N 'M'A and substantially improved str-uaWres mus e ae stmeted with electrical,
heatliig, Yentilmien, lu.}�>,in .,d air-conditioningequipment ilides that a designod
and-149F Wood so as to-piueyent,i,vantper�---Onj ent@ring ep a8r.U1:AUlat6ng Within t1je Gempenents during conditions-
of fleediW.
(iii) New and substantially improved structures shall be constructed with electric
} meter, electrical service panel box, hot water heater, heating, air conditioning, ventilation equipment
(including,ductwork and other similar machineU and equipment elevated(or in the case of non-residential
` structures optionally flood roofed to)a minimum of three 3 feet above the base flood elevation.
iv New and substantially improved structures shall be constructed with plumbing,
gas lines water/gas meters and other similar service utilities either elevated (or in case of non-residential
structures, optionally floodproofed to) a minimum of three (3) feet above the base flood elevation or
designated to be watertight and withstand inundation to such a level.
See.9.7.ADMINISTRATION.
(1)Appointment,Duties and Responsibilities of Flood Plain Administrator
(b) Duties and responsibilities of the Administrator shall include,but not necessarily
be limited to,the following:
(ix) Maintain the accuracy of the community's Flood Insurance Rate Maps
when;
a. Development placed within the Floodway(Overlay)District results
in any of the following
(i) An increase in the Base Flood Elevations,or
(ii) Alternation to the floodway boundary
b. Development placed in Zone A, AE, AH, and Al-30 that does
not include a designated floodway that will cause a rise of more than one foot in the base elevation;or
C. Development relocates or alters the channel.
Within six (6) months of the completion of the development, the applicant shall
submit to FEMA all scientific and technical data necessary for a Letter of Map Revision.
Section Three. All ordinances,or parts of ordinances,in conflict herewith are hereby repealed to
the extent of such conflict,if any.
Section Four. This ordinance shall be in full force and effect from and after its passage and
publication as required by law. I
Passed this dr day of yUh C- ,2024.
ek'ttw-
&E( IC64 #
Renee Half,City Clerk John A. Haila, Mayor