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Home My WebLink AboutMeeting Notes 01-19-16 ��^� �� i � SENIOR ASSOCIATE 612 7S2 0270 KAR-KEATCdSNOWKREILICH COM 4 ' � �] / � j �, I �/I ► � 1 \t.J � ��\��'� � I�(/�R-I�(EAT CHOI�IG 219 NORTH SECOND STREET SUITE 120 MINNEAPOLIS,MN 55401 612 359 9430 WWW.SNOWKREILICH.COM DESIGNER 612 752 0283 CHRISTINA(dSNOWKREILICH.COM C�-IR�S� ��1A 51AR 219 NORTH SECOND STREET SUITE 120 MINNEAPOUS,MN 55401 612 359 9430 WWWSNOWKREILICH.COM _.. _.__ ' _ ___ __ _. _ _ _ _ ___ _ ._..m_.��.�.n�..�_�v_�..*_�_._s �..,_.__ __.__� _ -�___ _-- _ _ _- .__ _ : ---- � _ � : _ ..._-_ ,. _ -._r_ �. � ---- - _ __ __ m._ . __ _. 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Lowest floors include basements and crawl lowest floor level must meet minimum elevarion ; requirements (i.e.,the Regulatory Flood Protection spaces of any size. An improperly elevated lowest floor can ' Ele�ation). result in a significant increase in flood insurance premiums!! ' � , Basement–�1ny area of a structure,including crawl '; space,having its floor subgrade(below ground level)on a11 sides. �owest Upper level Regulatory Flood Protection Elevation(RFPE� i The RFPE is the 100-year flood(1 percent annual i Adjacent �rede chance flood)elevation+ stage increase due to es- Lowest Level Garage tablishing floodway+ freeboard(Nlinnesota's mini- R F P E � � � ' mum is 1 foot). The lowest floor must be elevated I � so that the walking surface of that lowest floor is at � Fill Natural So�i the RFPE or higher. II Top of lowest level floor is lowest floor Base Flood Elevation(BFE)Same as the 1 percent I Figure 1.A concrete slab on grade is permitted for a annual chance Aood elevadon or the"100-year" ; home in a floodplain if the top(walking surface)of the flood elevation. lowest level floor is above the RFPE. �— The floodplain regulations apply to all enclosed spaces; they ' RFPE Formula ' do not differentiate between finished versus unfinished, habit- 100-year flood elevation + stage increase due to floodway i able versus not habitable,or a space that is more than a certain +freeboard (state requires 1-foot minimum) ' minimum height versus a space that is only a couple feet high. ; = regulatory flood protection elevation (RFPE) ' �owest Adjacent lovrest Grade Adjacen Main Garage �� Main RFPE Level 't � � �evel � �� ?,�>��e � �� FE � "�',,,� �, �� Crar�rt5par. .,� .e.. I FE '�asem � Fill �=�'r�a«rat sa� Fill ra a�ara�s oii Top of craavl space flaor is lowest floor Top af basemerrt floor is 6owest floar Figure 2. This example is not permitted for a home Figure 3.A below grade crawl space or utility space is in a floodplain because the basement is the lowesf considered a basement and it is the lowest floor. It is level of the home and it is below the RFPE. not permitted for a home in a floodplain because it is below the RFPE. Myths and Facts of Basement Definitions Myth: It is not a basement if I cannot stand up in it. Fact: It does not matter if a basement is 2 feet or 8 feet high, or if it is "habitable"based on state building code. ', It is a basement if it is below gxade on all sides. j Myth: It is not a basement if the floor is unfinished or dirt. � �I Fact: It does not matter if a basement floor is concrete or unfinished. It is a basement if it is below grade on all sides. Contact: DNR Waters in St.Paul(651)259-5700 � Page�l http://mndnr.gov/waters August 2010 . � Floodplain Information Sheet 4 Floodplain Management Series Basements & Lowest Floor Special Cases What is called a"basement"in common language usage in Minnesota is not always consistent with FEMA's definition of a"basement." In addition,there are other special situations to consider. 1. Walkout basement Lowert The typical Minnesota walkout basement is not a"basement"according to qdjacent UpperLevel s��age FENI� (Figure 4). FEMr1's basement definirion says all sides are subgrade Grde (below ground level),but the typical walkout basement has one complete �ower�e�et � ��ill side (the walkout side)with the floor at the same level as the adjouung RFPE ground level. If the walkout basement level is above the regulatory flood Nacura�soii '' protection elevauon (RF'PE),the local community may issue a standard build- rop ot�ower�e�e�noo��5 iowesc ie�ei ing permit. Figure 4.A walkout basement or lower level is permitted for a home in a floodplain if the top of A related but prohibited lay�out is shown in Figure S. Occasionally,a land- the lowest floor is above the RFPE. owner will excavate an area adjacent to one side of the basement floor. �o�n However,unless there is gravity flow drainage over the ground surface AdjacM towaxd the floodin source this is still considered a basement. Grde g � �;��._.. �.,� BfE Fi0 RFPE 2. Natural ground is above 1% annual chance flood elevation �'^e � If no fill is brought in,and the lowest adjacent grade (lowest place where � ��+� soil touches building) is above the 1%annual chance flood elevation,the 1oc or e��:roo��ww�:tr��, structure is officially out of the high-risk flood zone where floodplain man agement regulations apply(Figure 6).This structure may still be subject to Figure 5. Excavating an area adjacent to a basement severe flood damage from subsurface water pressure against the basement does not stop it from being a basement! There must be gravity flow drainage away from that lowest side. walls and standard basement construction is not recommended. Lowest lowen AdjaCeM Adjxerrt Excavated Grade Gfad2 P�;turalSoil Ma,,,;x,.�. srag Main Garage RFPE RFPE � — �� .. ' � � i �emeo� � � BF� � . . � SlE rr�r � r�r Natcual Soil Naturat So�l � Lake Top of bwest kvel flaor iz bwestfioor Figure 6. Lowest Adjacent Grade is above Base Flood Elevation Figure 7. Same situation as in Figure 6,but they excavated to make a (BFE)or the 1%annual chance flood elevation,so site is not in Zone walkout basement. They have put themselves into the high flood risk A orAE. Minimum floodplain regulations do not apply. area(Zone A orAE)and must meet the floodp/ain regulations,so now NOTE:The community may have higher standards.For example,if have a violation. the site is in shoreland district,there are still minimum e/evations. 3. Dry-floodproofed basements & "internally flooded enclosures below the lowest floor" Federal regulauons and state law give communities the authorit�•to issue conditional use permits for a few floodproofing options for the lowest floor iE: (a) the community's floodplain management ordinance includes those options, (b) the space will be used for a limited number of specific uses (usually onlj�for parking,limited stoxage,and access to up- per levels), (c) the floodpxoofing proposal meets all the other limitations for that floodproofing option (i.e.,dry floodproofing is allowed for non-residential structures only,unless the communiry is one of the eight Minnesota communities with a formal exception from FEM�1 fox dxy floodproofing of residential basements), and (d) specific technical standards and legal requirements are met. See the floodplain infornzation sheet"Conditional Uses in the Floodp/�sin"for more information. �Contact: DNR Waters in St.Paul(651)259-5700 � �� Page 2 � http://mndnr.gov/waters August 2010 Sec. 78-1111. - Definitions. Unless specifically defined below, words or phrases used in this article shall be interpreted so as to give them the same meaning as they have in common usage and so as to give this article its most reasonable application. (1) Accessory use or structure means a use or structure on the same lot with, and of a nature customarily incidental and subordinate to, the principal use or structure. (2) Basement means any area of a structure, including crawl spaces, having its floor or base subgrade (below ground level) on all four sides, regardless of the depth of excavation below ground level. (3) Conditional use means a specific type of structure or land use listed in the official control that may be allowed but only after an in-depth review procedure and with appropriate conditions or restrictions as provided in the official zoning controls or building codes and upon a finding that: a. Certain conditions as detailed in the zoning ordinance exist. b. The structure and/or land use conform to the comprehensive land use plan if one exists and are compatible with the existing neighborhood. (4) Equal degree of encroachment means a method of determining the location of floodway boundaries so that flood plain lands on both sides of a stream are capable of conveying a proportionate share of flood flows. (5) Flood means a temporary increase in the flow or stage of a stream or in the stage of a wetland or lake that results in the inundation of normally dry areas. (6) Flood frequency means the frequency for which it is expected that a specific flood stage or discharge may be equaled or exceeded. (7) Flood fringe means that portion of the flood plain outside of the floodway. Flood fringe is synonymous with the term "floodway fringe" used in the flood insurance study. (8) Flood plain means the beds proper and the areas adjoining a wetland, lake or watercourse which have been or hereafter may be covered by the regional flood. (9) Flood proofing means a combination of structural provisions, changes, or adjustments to properties and structures subject to flooding, primarily for the reduction or elimination of flood damages. (10) Floodway means the bed of a wetland or lake and the channel of a watercourse and those portions of the adjoining flood plain which are reasonably required to carry or store the regional flood discharge. (11) Lake Minnetonka means the naturally occurring lake shown on all the official maps referenced in this chapter, including all bays, channels, inlets, lagoons, marshland and other water-connected portions, whether naturally occurring or artificially created: a. Defined ordinary high water elevation, 929.4 feet MSL. b. Defined floodplain boundary, 100-year flood, 931.5 feet MSL as established by the Minnehaha Creek Watershed District(MCWD). (12) Lowest floor means the lowest floor of the lowest enclosed area (including basement). An unfinished or flood resistant enclosure, used solely for parking of vehicles, building access, or storage in an area other than a basement area, is not considered a building's lowest floor. (13) Manufactured home means a structure, transportable in one or more sections, which is built on a permanent chassis and is designed for use with or without a permanent foundation when attached to the required utilities. The term "manufactured home" does not include the term "recreational vehicle." Page 1 (14) Obstruction means any dam, wall, wharf, embankment, levee, dike, pile, abutment, projection, excavation, channel modification, culvert, building, wire, fence, stockpile, refuse, fill, structure, or matter in, along, across, or projecting into any channel, watercourse, or regulatory flood plain which may impede, retard, or change the direction of the flow of water, either in itself or by catching or collecting debris carried by such water. (15) Principal use or structure means all uses or structures that are not accessory uses or structures. (16) Reach means a hydraulic engineering term to describe a longitudinal segment of a stream or river influenced by a natural or man-made obstruction. In an urban area, the segment of a stream or river between two consecutive bridge crossings would most typically constitute a reach. (17) Recreational vehicle means a vehicle that is built on a single chassis, is 400 square feet or less when measured at the largest horizontal projection, is designed to be self-propelled or permanently towable by a light duty truck, and is designed primarily not for use as a permanent dwelling but as temporary living quarters for recreational, camping, travel, or seasonal use. For the purposes of this article, the term recreational vehicle shall be synonymous with the term travel trailer/travel vehicle. (18) Regional flood means a flood which is representative of large floods known to have occurred generally in Minnesota and reasonably characteristic of what can be expected to occur on an average frequency in the magnitude of the 100-year recurrence interval. Regional flood is synonymous with the term "base flood" used in a flood insurance study. (19) Regulatory flood protection elevation means an elevation no lower than one foot above the elevation of the regional flood plus any increases in flood elevation caused by encroachments on the flood plain that result from designation of a floodway. a. The regulatory flood protection elevation within the floodway and flood fringe districts, except for Lake Minnetonka, shall be established by adding 1.0 foot to the base flood water surface elevations within floodway listed in the floodway data table contained in the flood insurance study. Regulatory flood protection elevations between cross sections shall be interpolated. b. The regulatory flood protection elevation for Lake Minnetonka shall be 932.5 MSL. c. The regulatory flood protection elevation within the general floodplain district shall be calculated by a qualified registered professional engineer in accordance with procedures set forth in this article. (20) Structure means anything constructed or erected on the ground or attached to the ground or on- site utilities, including, but not limited to, buildings, factories, sheds, detached garages, cabins, manufactured homes, recreational vehicles not meeting the exemption criteria specified in section 78-1131(1) of this article and other similar items. (21) Substantial damage means damage of any origin sustained by a structure where the cost of restoring the structure to its before damaged condition would equal or exceed 50 percent of the market value of the structure before the damage occurred. (22) Substantial improvement means, within any consecutive 365-day period, any reconstruction, rehabilitation (including normal maintenance and repair), repair after damage, addition, or other improvement of a structure, the cost of which equals or exceeds 50 percent of the market value of the structure before the"start of construction"of the improvement. This term includes structures that have incurred"substantial damage,"regardless of the actual repair work performed.The term does not, however, include either: a. Any project for improvement of a structure to correct existing violations of state or local health, sanitary, or safety code specifications which have been identified by the local code enforcement official and which are the minimum necessary to assure safe living conditions. b. Any alteration of an "historic structure," provided that the alteration will not preclude the structure's continued designation as an "historic structure." For the purpose of this article, "historic structure" shall be as defined in Code of Federal Regulations, Part 59.1. Page 2 (23) Variance means a modification of a specific permitted development standard required in an official control including this article to allow an alternative development standard not stated as acceptable in the official control, but only as applied to a particular property for the purpose of alleviating a practical difficulty as defined and elaborated upon in a community's respective planning and zoning enabling legislation. (Ord. No. 88 3rd series, § 4, 6-27-2011) Page 3 � � l220 lvrac��f�s�F�d � � I �_�s�. .��.,� � - �`�,7z1 qo � �- �,g�l� � /o� �z . 1 �o, ��z � �`�, ?Z! = � �� i � I - --- i t .. « �♦ �... a� 't . � %•� . . �. ::.., , . � � a � x ♦ : ` h. : :_ . 4` � � � ,�. - `/. 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'��- Ji �I`��k'� _ ` I'�p � �. � � � �'��''�:� ;p. � �.� � �� • ,� � "" � ,�'°`.. �y � `,y � _ . � � r � . � � �� '� • �_ '� �. �� — t ��4 ��'� � �; '� � ' � " � �'� � �� .� � _ �� w � � � ,�� ,� � � � � � � � � � �� , �;� � r " . - .� ��, ► .� � - .• . , � M° - �i � � � '� �� , ' � 0 70 Feet a.,----._. i/��l O(VO�� . i � Disclaimer: �AkF-SIjO j This drawing is neither a legally recorded map nor a rvey and is not intended to be used as one.This drawing is a compilation of records,information,and data lo<ated in various city,counry,and state offices,and other sources affecting the area shown,and is to be used for reference purposes only.The City of Orono is not responsibleforanyinaccuraciesherein<ontained. �� O Bolton&Menk,Inc-Web GIS 1/19/201611:24 AM I (/� ��