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Home My WebLink About760526.tiff . . . .. .. _ _ �_a . ...., . . . .• Recorded m •� of 241976 a" ` -,•- RESOLUTION 0.tt.No....y.w1-Qti};`Mery Ann FexnN�n.RM�nb _ . g1n 1 WHEREAS, pursuant to law, the Board of County Commissioners, f Weld County, Colorado, is vested with the responsibility of administering . - , the affairs of Weld County, Colorado, and _ WHEREAS, the Weld County Planning Commission by Resolution - `n has recommended to the Board of County Commissioners, Weld County, • ti Colorado, that the Weld County Zoning Re solution and the Weld County - Subdivision Regulations be amended; and that the Weld County Supplemen- - ' ° tary • . . Regulations concerning geologic hazards and flood plains marked ' - Exhibit "A", be added to said Weld County Zoning Resolution and Weld '° County Subdivision Regulations, and . - r• WHEREAS, the said Weld County Supplementary Regulations - ., concerning geologic hazards and flood plains, marked Exhibit "A", as an addition to the Weld County Zoning Resolution and Weld County r_ Subdivision Regulations is attached hereto and made a part of this O1 Resolution by reference, and 'l WHEREAS, the Board of County Commissioners, Weld County, i. - • Colorado, believes it to be in the best interest of the County to approve said Weld County Supplementary Regulations concerning geologic . hazards and flood plains, marked Exhibit "A", as an addition to the Weld County Zoning Resolution and the Weld County Subdivision Regu- • lotions in their entirety. - • NOW, THEREFORE, BE IT RESOLVED, by the Board of County .. ' - _ - Commissioners, Weld County, Colorado, that the Amendment to the , Weld County Zoning Resolution and the Amendment to the Weld County •K - - Subdivision Regulations by the addition of the Weld County Supplementary Regulations concerning geologic hazards and flood plains, marked 'AN- Exhibit "A", all as shown on the attached exhibit be and the same are • hereby adopted. - • • Dated this 7th clay of July, 1076. • - BOARD OF COUNTY COMMISSIONERS WELD COUNTY, COLORADO • , a • l<-«a-li ,. el (7ttt..EST .s. 'Z • { - dtCbuty Clerk and corder 4 to th B '.yam • /.772�e/./ _.__ __.`-_. . _. ...___ _.__._. ..,,. . - ,e County Clerk -- - _` APP- ED AS TO FSR�� - �7 �f !r.(// Y cialLegat C onset / . f- p PLO/4► n. C i'+l 760526 4//g.4//g. 936 �+jFM�M9} AY7S� g75 1.70706.1. ♦ ♦ • MELD COUNTY , SUPPLEMENTARY REGULATIONS .♦ Concerning • GEOLOGIC NA7ARDS .- - FLOODPLAINS -•• • • e June 1976 la .; • , M. - • . • . . . V. A N 1.11C,LArA1c►ii.frz%ncraa.eoRa.. YaYO'tx?----"ce- . ' 785 1707061 .O'3 TABLE OF CONTENTS Page SECTION I GENERAL PROVISIONS A. Relationship to Other Regulations 1 B. Authority 1 ' • - C. Applicability 1 , 0. Definitions 2 E. Evaluation of Permit Application 5 F. Adoption and Amendment of Official Maps 5 -— G. Mapping Disputes 7 H. Administration and Enforcement 8 SECTION II ' • GEOLOGIC HAZARD AREAS A. Purpose and Intent 9 B. Supplementary Application Requirements 10 C. Standards 12 • -L - - - ---; D. Qualifications of Investigators 13 �. • ' E. Exemptions 13 • w SECTION III , g FLOODPLAIN AREAS • A. Purpose and Intent 15 • - B. Supplementary Application Requirements 15 _. C. Standards 18 - D. Qualifications of Investigators 23 h a. $ E. Exemptions 23 , h. ,rry0 it • .) a j , • ' ' • 1967061 '785 26.E ;_ SECTION I -_. . GENERAL PROVISIONS A. Relationship toOther Regulations ' . a . 1. These regulations are supplementary to requirements adopted under — . - • Title 30, Article 28, Parts 1 and 2, Colorado Revised Statutes ` • 1973, as amended. . 2. Nothing in these regulations shall be construed as exempting an _ applicant for a development permit from any other requirement of y •- . ;' Weld County or other state or federal laws and regulations. 3. To the extent that the requirements of these regulations differ ,. from other applicable requirements, the more restrictive require • - -: _ .. _._._..._ ' ments shall apply. - B. Authority These regulations are adopted pursuant to. inter alia, section 29-20- 101, et, seq., 24-65.1-101, gt, 5gq„ and 30-28-101 Lt. im., C.R.S. 1973. . '‘. -? . C. Applicability - _ . . _ 1. Jurisdiction - These regulations apply to all applications for development permits in areas within the unincorporated portions (7 of Weld County, Colorado, which have been identified for regulation - re , `,-' by the Board of County Commissioners. . _B 2. Boundaries - The boundaries of regulated areas shall be as they . - appear on maps officially adopted by the Board of County Commissioners. Maps officially adopted by the Board shall be on file with the Clerk - . - - and Recorder and shall also be available for public inspection in the q- . Weld County Department of Planning Services. However, where flood *..�. _ . 4 • - 1 - . - /_ , o . _.. .... . .._-- . -._:. - _ _.._. -_.__. ._...__�.. _ . . . • . . 1707061 - = • - 485 1-6-5 adopted by the Board of County Commissioners, such elevation data � --- shall take precedence over the adopted maps on file with the Clerk . • and Recorder of the County and in the Department of Planning Ser- vices. Where there is a conflict between the boundary lines illus- trated on the map and the actual field conditions, the disputes shall be settled according to "Mapping Disputes", Section I. G. of _ - this regulation. , 3. Required Information - Any person seeking to engage in development in any area in Weld County governed by these regulations shall sub- s mit the information called for by these regulations as a supplement • to his application for a development permit. 4. Waiver of Submission Requirements - The Board of County Commissioners l may waive any part, but not all, of these submission requirements if . { . . the submission requirements or any portion thereof are inapplicable . to the development for which the permit is sought. '-._� 5. Disclaimer - The regulation of a hazard area by these supplementary -'.; .,r . __. regulations does not constitute an affirmation by the County of Weld that lands outside the regulated area as defined on maps adopted by . 4 -- - , - the Board of County Commissioners will be free from the regulated •. -- , - of 3 hazard. D. Definitions . 1. Applicant - means any person applying for a permit to engage in _ - development in a regulated area. - 2. Development - means any construction or activity which changes the - character or the use of land. -ix . ' , . 3. Development Permit - means a permit for a Conditional Use, Special Use lD change of zone or subdivision of land including Recorded Exemptions and Planned Unit Developments. 2 . . f ^ •. • • 41 1707061 785 3•6 4. Fill - means a material such as earth, clay, sand, concrete, rubble or waste of any kind, placed, stored, or dumped upon the surface .. .. of the ground, which increases the natural ground surface elevation. 5. Flood Elevation Information - means the elevation and depth of — -. flooding which is determined for specific locations in the flood- plain. - • • - 6. Flood Hazard Area - means one or more of the following: flood prone area, floodway area, low hazard area. • 7. Flood Prone Area - means areas subject to inundation whose physical conditions give a definite direction to a flow of runoff,the 100 year elevations of which have not been determined. The physical location of flood prone areas on officially adopted maps is representative of ,. existing ground conditions and may be based, among other things, on - historical flood records or other readily available data. - 0. Floodplain - means an area in and adjacent to a stream, which is - r. subject to flooding as the result of an intermediate regional flood. 9. Floodproofing - means the design or modification of lands, properties. or structures intended to mitigate or eliminate flood damage in a .Q flood hazard area. t' 10. Floodway Area - means that portion of the floodplain in which the • waters of an intermediate regional flood exceed one and one-half IV • • ! feet in depth. V 1.. Geologic Hazard - means a geologic phenomenon which is so adverse to !, past, current, or foreseeable construction or land use as to consti- tute a significant hazard to public health and safety or to property. -d • -The term includes,but is not limited to: unstable or potentially un- A stable slopes, seismic effects, radioactivity, and ground subsidence. h . 4 . 3 • , `x'785 1'7t'7061 12. Geologic Hazard Area - means an area which contains or is directly affected by a geologic hazard. - 13. Ground Subsidence — means a process characterized by the downward - - displacement of surface material caused by phenomena such as removal of underground fluids, natural consolidation, dissolution of under- ground minerals, or underground mining. • 14. Hazard Area - means any area governed by these supplementary regulations " where a natural or man-made condition presents a potentially signifi- - a � ' r cant harm to public health, safety, welfare, or property. 15. Intermediate regional flood - means a flood with an average statisti- cal one percent chance of occurring during any one year. The term _ is used interchangeably with a one percent flood or a one hundred I+, , year flood. 16. Low Hazard Area - means that area of the fioodplain in which the . waters of an intermediate regional flood will not attain a maximum depth greater than one and one-half feet. Q , • 17. Mitigate - means to take preventive or remedial action to lessen the adverse impact of a natural,hazard. - 18. One Hundred Year Flood - means an intermediate regional flood. . • • 19. One Percent Flood - means an intermediate regional flood. - 20. Person - means any individual, partnership, corporation, association, „ . company, or other private, public or corporate body, including the federal government, and includes any political subdivision, agency, ' " ' 'r instrumentality, or corporation of the state. • • ' 21. Radioactivity - means various types of radiation emitted by natural - radioactive minerals that occur in natural deposits of rock, soils, and water. •_ 4 • Q C • 1785 1767061 - 11.-$ 22. Regulated Area - means any area in Weld County falling within the scope _ of these supplementary regulations. 23. Seismic Effects - means a rapid shifting and displacement of geologic formations caused by earthquakes, volcanic action, or man created explosions, the consequences of which are potentially destructive = to human life and property. 24. Structure - means anything constructed, erected, or placed on or • , attached to the ground, including, but not limited to, docks, dams, f fences, mobile homes, sheds and buildings.• "v • 25. Unstable or Potentially Unstable Slope - means an area susceptible to landslide, mudflow, rockfall, or accelerated creep of slope- t • forming materials. E. Evaluation of Permit Application - tr } The Board of County Commissioners shall approve an application for a development permit in an area governed by these supplementary regula- tions only if the applicant has complied with all the provisions of the st particular development permit application procedure and the applicable -- -- - , requirements of these supplementary regulations. . • F. Adoption and Amendment of Official Maps - a+_ Maps delineating regulated areas shall be officially adopted by the • Board of County Commissioners only after a public hearing. Notice of • • such hearing shall be published one time in a newspaper of general cir- � r 1 culation in the county at least thirty (30) days, but not more than •• • _ sixty (60) days, prior to the hearing. The published notice shall include • `�' ' the time and place of the hearing, and shall designate a county office where the proposed maps will be available for public inspection. _ Within thirty (30) days of the conclusion of the hearing, the map(s) --- • _---- 5 . • • I 785 170' 061 ab'9 - • - shall be adopted by the Board upon its finding that the boundaries . , . shown are consistent with available data which determines the geo- graphic extent of the regulated area and that the regulation of the - area is necessary for the protection of public health, safety, and • welfare. • Prior to consideration of a map for official adoption by the Board of • County Commissioners, the proposed map(s) shall be reviewed by the _ , - - Planning Commission, which shall present tothe Board its recommendations ' • for adoption, rejection or adoption with modification of the map(s). . • Maps officially adopted by the Board shall be on file with the Clerk ' s '�? and Recorder of the County and shall also be available for public , .. inspection in the offices of the Weld County Department of Planning • Services. Maps officially adopted by the Board of County Commissioners as a part • - of these supplementary regulations may be amended in accordance with the - above procedures. _ . r - a T. • , f r , ./ e . 6 I . • • + , • • I - O' - . . . . .-. • • • - I • /785 1707061 • a6-lo G. Mapping Disputes The following procedure shall be used by the Board of County Commis- •• stoners in deciding cases in which the boundary of a regulated area is disputed. A person contesting the location of an area falling • within the scope of this regulation shall present his case to the -- Board at a public hearing held in accordance with•the procedures • found in Section I. F. above for the amendment of officially adopted • maps. The contestant shall submit technical evidence to support his case. The Board shall not allow deviations from the boundaries shown on the official adopted map unless technical evidence presented by the contestant clearly and conclusively establishes that the boundary shown on the official adopted map(s) is incorrect. Prior to the public hearing held before the Board of County Commissioners • • to consider a mapping dispute, the Planning Commission shall review the '� technical evidence of the contestant at a regularly scheduled meeting of the Commission, and shall submit its recommendations to the Board.:, • • • • • • • 1'785 J 707061 i H. Administration & Enforcement These regulations shall be administered and enforced according to the provisions of the Held County Zoning Resolution and Subdivision Regu- lations which are applicable to the type of development permit sought • • by the applicant. 4 • �'. ». . e• • i 1 . I. }. 8 • r = • • • • l' 785 1707061 2b-a • j ♦ -+ SECTION II GEOLOGIC HAZARD AREAS• • A. Purpose and Intent 4 The Board of County Commissioners finds that there are,within the County . of Weld,various areas subject to unstable geologic conditions which may cause serious damage to properties and subject the safety of residents ' of such areas to hazards, and that the imprudent use and occupation of _ - - `: these areas will pose a continuing danger to life and property, unless .-r-- appropriate land use measures are implemented concerning the use and occupation of such hazardous areas. The purpose and intent of these Geologic Hazard Regulations shall be to: 4 1. Minimize hazards to public health and safety or to property in regulated geologic hazard areas; 2. Promote safe use of geologic hazard areas; ` 3. Reduce the adverse impact of geologic hazards on life and property by: - • - - a. Requiring land uses permitted in geologic hazard areas to be - protected from geologic hazards by providing for geologic hazard -i '• - investigation and the mitigation of the advers^ impacts of such - - y ' hazards at the time of initial construction; • • �' b. Regulrting the manner in which structures designed for human i occupancy may be constructed so as to prevent danger to human - 4a life or property within such structures; • ,. 4. Protect the public from the burden of excessive financial expenditures caused by damage from geologic hazards by regulating land uses within ^, geologic hazard areas. .! 9 S -- - • • •• .. 1707061 785 1613 1, • B. Geologic Hazard Area Supplementary Application Requirements _ • Before a permit for development in a regulated geologic hazard area is issued, the Board of County Commissioners shall determine that the proposed development has met the intent and purpose of these geologic • hazard regulations, after considering the following supplementary plans, maps, reports, and data, which shall accompany the application for such permit. • i 1. A map(s) portraying the geologic conditions of the area with par- ticular attention given to the specific regulated geologic hazard(s). The map shall be delineated in drawing ink on myiar or other draft- ing medium approved by the Director of Planning Services. The dimen- 0 sions of the map shall be twenty-four (24) inches by thirty-six (36) - inches. The map shall be prepared at a 1" • 100' scale and shall in- dude the parcel in question, as well as features within 500 feet of the parcel boundaries. The scale of the map may be reduced or en- larged upon approval of the Director of Planning Services. Such map(s) shall also include: 't , a. A certified boundary survey of the property for which application • is made. 3earings and distances of ail perimeter boundary lines - - - 4 . , shall be indicated outside the boundary lines. . b. The topography of the area at ten (10) foot contour intervals or at intervals as determined by the Board of County Commissioners • ` or its authorized representative.. - .$ c. Existing structures and landscape features, including the name ' and location of all watercourses, ponds, and other bodies of -- • J. water.d. Proposed building locations and arrangements. 10 1 . • e e w . • . '785 41 1%7061i y _ _. , �b• lJ ; ' - e. The legend shall include a complete and accurate legal descrip- - tion as prescribed by the development permit application form. The description shall include the total acreage of the surveyed parcel. - f. Certificates i• (1) Engineer's Certificate (2) Surveyor's Certificate - a • g. Title, scale and north arrow, •h. Date, including revision dates if applicable. a 1. Such additional information as may be required by the Board of .. County Commissioners. • " 2. A geologic report explaining the above map(s) with particular em- '- phasis on evaluating and predicting the impact of such geologic con- ditions on the proposed land use changes and developments. The report 1. shall also include recommended mitigating procedures to be employed , .i in meeting the intent and purposes of this regulation. Specific requirements of such report are listed below. I a. Ground Subsidence Areas - Applications for development in ground " y. subsidence areas shall include, but not be limited to, the follow- Mg information or data, where applicable. •' (T) Mount of material removed or materials subject to volume • decrease. (2) Interval between the ground surface and the location of void • ' • space or materials subject to volume decrease. (3) In poorly consolidrted aquifers, the effect of pore fluid - ` . withdrawal. --- - -" -- it • c - _ • .. •u . • - , _. .•µ • • al 785 1'70'706* ab 15 _ (4) In wind deposited silt (loess) areas, and areas of pre • - . dominantly fine-grained colluvial soils, the amount of • wetting the area is subject to and its effect. (5) In areas of soluble materials, the effect of wetting. _ (6) In areas of underground mining, data regarding air shafts, t. haulage ways, edits, faults, rooms and pillars, and final mine maps. • • �. (7) Building type and proportion. (8) Pertinent geologic and hydrologic factors of the area. (9) Test hole and well log data. • (10) Mitigation techniques that will be employed, including •• • effectiveness and estimated cost of such techniques. •. (11) Pertinent historic factors including, but not limited to, • past occurrences of ground subsidence in the area proposed • for development. - -• b. Unstable or Potentially Unstable Slope Areas - [eservea] c. Radioactive Areas - [Reserved] -• d. Seismic Effect Areas - ]1eserved] a Co Standards '• 1. Applicants seeking a permit to develop in a regulated geologic - • - .• hazard area must demonstrate to the Board of County Commissioners through the required map(s) and report(s) that all significant geologic hazards to public health and safety and to property shall be minimized by use of mitigating techniques. -- -� et. 12 } • • . .. , r. • ♦ • • (1 . a • • • • 1707061 41'785 6 Iv 2. Proposals for development in a regulated geologic hazard area shall • be designed or reviewed by a registered professional engineen who shall certify that the design of the proposal insures the protection of human life and property from the adverse impact of geologic hazards • to the greatest extent possible. 3. Any construction approved by the Board of County Coomissionert within a regulated geologic hazard area must be supervised by a qualified professional engineer. Engineering techniques to mitigate geo- logic hazard conditions at the site must be employed. 4. Recommendations shall be solicited from the Colorado Geological Survey on all development permit applications in which the proposed develop- ment would be within a regulated geologic hazard area. Recommendations must be received within twenty days after they are requested in order• - to be considered by the Department of Planning Services in its recommen- dations concerning the proposed development permit. .. • - D. Qualifications of investigators 1. All geologic maps and reports required by these regulations shall be prepared by or under the direction of,and shall be,signed by a pro- fessional geologist as defined by Section 34-1-201, et. sew„ C.R.S. • 1973. - •� 2. All engineering work required by these regulations shall be prepared by or under the direction of a registered professional engineer as •- --_ : defined in Section 12-25-101, et. sen , C.R.S. 1973. • E. Exemptions 4 - o m v . These regulations shall not apply to land uses which do not involve any of "a the following: • • 13 • • - - a • 1- 785 1707061 , • Z4'1� J 1. Human habitation 2. Concentrations of people, or 3. Potential hazards to human life or property. • S, . • • w _ 4 .. . 5- ' '• F ,y- • - -- . - -- D r la ti n.. 14 . - ) _..._.___ _. ,. __- --_-te0 • . .... a • '785 1.707061 96- SECTION iii FLOOOPLAIN AREAS A. Purpose and Intent The Board of County Commissioners finds that there are, within the County - r of Weld, various areas subject to flooding which may cause serious damage • to properties and subject residents of such areas to hazards, and ' that the imprudent use and occupation of these areas will pose a con- • tinuing danger to life and property unless appropriate land use measures are implemented concerning the use and occupation of such hazard areas. The purpose and intent of these floodplain regulations shall be to: • 1. Promote the public health, safety and general welfare. • - 2. Regulate floodplains, the use and occupation of which pose . a danger to human life and property in the absence of-regu- lation. . 3. Facilitate the regulation of flood hazard areas by establish- . ing requirements which must be met before development in such , areas is permitted. • 4. Minimize hazards to public health, safety and property in flood hazard areas. . 5. Protect the public from the burden of avoidable financial expend i- tures for flood control projects and flood relief measures. 6. Avoid interruptions of business and commerce. ' • �' 7. Minimize damages to public utilities, streets and bridges. 'c B. Floodplain Hazard Area Supplementary Application Requirements Before a development permit for development in a regulated floodplain area is issued, the Board of County Commissioners shall determine - - - that the proposed development has met the intent and pur- 0 ' ,r .r 15 • �" _ • 1767061 abo er pose of these floodplain regulations, after considering the follow- • ing supplementary plans, maps, reports and data, which shall accom- pany the application for such permit. Prior to submittal of an appli- cation to the Department of Planning Services, the applicant shall - - r _ consult with the Department of Engineering Services on the form and - • content of hydrologic data to be gathered and studies to be conducted in order to insure that adequate and appropriate information will be - provided for review of the application by the Department of Planning , Services.. 1. A map(s) portraying the existing physical conditions of the area such as surface features, topographic terrain characteristics, - -- --- drainage patterns and courses. The map information shall be deline- ated in drawing ink on mylar or other drafting medium approved by , the Director of Planning Services. The dimensions of the map shall be twenty-four (24) inches by thirty-six (36) inches. The map shall be prepared at a 1" • 100' scale and shall include the parcel in question as well as features within 500 feet of the parcel bound- aries. The scale of the map may be reduced or enlarged upon approval - a• of the Director of Planning Services. Such map shall include: a. A certified boundary survey of the property for which appli- cation is made. Bearings and distances of all perimeter.bound- - ary lines shall be indicated outside the boundary lines. •' b. The topography of the area at two (2) foot contour intervals or at intervals as determined by the Board of County Commissioners •- A, 4 or its authorized representative. • i' 16 • • • a. • • 4 • 1'701061 '785 at, -ao c. The boundaries of regulated flood hazard area(s). In all cases except development permit applications for Special - - Use Permits, Conditional Use Permits and Recorded Exemptions • in floodprone areas, the boundaries of the floodplain, flood- - • way and low hazard areas within the flood hazard areas) shall be _ included. d. Existing structure and lerdscape features including the name and location of all watercourses, ponds, and other bodies of water. e. Proposed building locations and arrangements. - f. A legend which includes a complete and accurate legal descriptio,: . as prescribed by the development permit application form. The _4 r description shall include the total acreage of the surveyed parcel. �. g. Certificates • (1) Engineer's Certificate (2) Surveyor's Certificate _ h. Title, scale and north arrow. 1. Date, including revision dates if applicable. J. Such additional information as may be required by the Board - - of County Commissioners, in order to determine if the intent _ and purpose of this regulation have been fulfilled. e • 2. A report detailing any calculations or hydrologic data used in prepar- ing the above map(s). The report shall also include recommended • - • mitigating measures to be employed in meeting the intent and purposes •--j - of this regulation. Other requirements of such report are listed below: a. Description of the proposed development to include: • ea„ • • - (1) Type and number of structures to be developed; • �,, (2) Proposed floodproofing measures; _. 17 • • , • .0 _ if!- 785 1101061 a.G-Q1 • (3) The size of the area and stages to be developed at any one time; (4) A timetable giving the periods of time which will be required for the various stages of the development; . (5) Water and sewage facilities; and (6) County roads and bridges affected. b. Description of proposed drainage system to include: natural , drainage ways, underground facilities, street and gutter, retention ponds, and any other pertinent information. Appro- priate construction and/or design drawings, shooing typical sections and noting standards to be applied, shall be submitted • with the application form. Such drawings shall demonstrate the adequacy of facilities to handle the floodwaters. - c. All available flood elevation information. Within flood prone areas, the applicant shall establish flood elevations • which determine the boundaries of floodway and low hazard areas ` located in the proposed development site for all applications • 1 involving rezoning, subdivision and planned unit developments. e . The methods and techniques used to analyze the data unique to a the area's precipitation runoff conditions shall be noted. r Such information shall be submitted in a form easily readable by reviewing agencies. e. .. • C. Standards 1. Flood Prone Areas - • '- • In order to minimize flood damage, development in flood- • -• ' . pr neareas shall meet the following standards: n '� . F t . 18 .Ir _ er - . . . > - - t - -, ct c, t .p _ , Q — --- 78542 _ -_--- 1707081 a. The storage or processing of materials which, in time of flooding, are buoyant, flammable, explosive, or otherwise . potentially hazardous to human, animal, or plant life shall • not be permitted. - b. The disposal of garbage or other solid waste materials shall not be permitted. , •. c. Such development shall not cause an enlargment of the flood • - plain which would cause damage to other properties. • d. All construction proposed in a development permit application shall be floodproofed to include anchoring of structures - . - where necessary to prevent flotation, collapse, or lateral , movement. e. All public utilities and facilities, such as sewer, gas, electri- - cal and water systems, shall be located and constructed to mini- mize or eliminate flood damage. : f. Adequate drainage shall be provided in order to.reduce exposure . . • . to flood hazards. - g. New or replacement water supply systems and sanitary sewage sys- tens shall be designed to minimize or eliminate the infiltration • ., --- of such systems by floodwaters. • • y. h. The contamination and pollution of water shall be avoided by •. designing and locating on-site waste disposal systems so that their function is not impaired by the infiltration of floodwaters. ._. i. The availability of flood protection devices sha'l be taken into . , .' account in the design of the development. . - J. The design of the development shall take into account the potential JD • —-� n� impact of the development on downstream communities, such as the - creation of obstructions during floods. - • 19 . • g . 17C706S 785 16.2.3 . - 2. Low Hazard Areas In order to minimize flood damage, development in low hazard areas • shall meet the following standards: a. The storage or processing of materials which, in time of flood- ing, are buoyant, flammable, explosive, or otherwise potenti- • ally hazardous to human, animal, or plant life shall not be per- milted. b. The disposal of garbage or other solid waste materials shall not be permitted. c. Such development shall not cause an enlargement of the flood- - plain which would cause damage to other properties. d. If the floodwaters on any portion of the development site will attain a velocity greater than three (3) feet per second, • additional floodproofing shall be utilized to protect those structures and lands subject to such water velocity. - e. All construction proposed in a development permit application •:u shall be elevated or floodproofed to at least one foot above *. the maximum water elevation of the intermediate regional flood. - All residential structures within the low hazard area shall have t the lowest floor (including basement) elevated to or above the . -. level of the intermediate regional flood. Floodproofing shall . include anchoring of structures where necessary to prevent - . flotation, collapse, or lateral movement. • f. All public utilities and facilities, such as sewer, gas, electri- - . , cal and water systems, shall be located and constructed to mini- .y mize or eliminate flood damage. - 20 ti ti • 1'707061 '7£l5 23.-24 g. Adequate drainage shall be provided in order to reduce exposure to flood hazards. • h. New or replacement water supply systems and sanitary sewage • • systems shall be designed to minimize or eliminate the infil- tration of such systems by floodwaters. • i. The contamination and pollution of water shall be avoided by designing and locating on-sitewaste disposal systems so that their function is not impaired by the infiltration of floodwaters. J. The availability of flood protection devices shall be taken into account in the design of the development. k. The design of the development shall take into account the potential .� impact of the development on downstream communities, such as the creation of obstruction during floods. . 3. Floodway Areas - - - All construction proposed in a development permit application shall , be flood proofed to at least one foot above the maximum water ele- vation of the intermediate regional flood. Floodproofing shall in- ♦ dude anchoring of structures where necessary to prevent flotation, .64# collapse, or lateral pavement. No development on any portion of a - ' floodway shall be permitted which alone, or cumulatively with other -.. ° activities, would cause or result in any of the following: a. The human occupation of structures for residential purposes. b. The storage or processing of materials which, in time of flood- : • - r �• ing, are buoyant. flammable, explosive, or otherwise potentially• - hazaruous to human, animal, or plant life. • c. The disposal of garbage or other solid waste materials. • en- d. Substantial solid debris being carried downstream by floodwaters. 21 • /785 1767061 23.-.23 ! • e. An increase in the water surface elevation of the 100-year flood by litre than one (1) foot at any point. f. Fill or encroachments that would impair the ability of the floodway to carry and discharge the waters resulting from ;, the 100-year flood, except where the effect on flood heights is fully offset by physical changes in the floodplain. • g. Expansion of any existing non-conforming uses, except that - - such uses may be modified, altered, or repaired to incorporate floodproofing measures, provided such measures do not raise the level of the 100-year flood by more than one (1) foot. h. Hew or replacement water supply systems and sanitary sewage systems,unless such systems are designed to minimize or elimi- nate infiltration by floodwaters. -.r 1., On-site waste disposal systems, unless such systems are de- r •" _ signed to avoid infiltration by, or contamination and pollution ;- � •. of,floodwaters. r ^c? 4. Where floodproofing is required, a registered professional engineer shall certify that the floodproofing methods are adequate to with- - stand the flood depths,pressures, velocities, impact., uplift forces j`•�';' and other factors associated with the 100-year flood, and shall sub- _ • -.. mit supporting data and information. 5. All contour lines shown on maps prepared by private contractors or consultants shall meet the following standards of accuracy: ninety . . percent (90%) of the contour lines must be within one-half contour v interval; the remaining contour lines must be within one contour • interval. . 0 • 6. All maps submitted by an applicant seeking a development permit shall ,• :. . show existing (solid lines) and proposed (dashed lines) contours of 77 re", • 178 5 1707061 2L•11. 1 - - - - - the site within the scope of the map at an interval of not greater • - than two (2) feet for those portions of the site within a regulated - flood hazard area. 7. Recommendations shall be solicited from CM Colorado Water Conser- vation Board on all development permit applications in which the proposed development would lie within a regulated floodplain area. ,A 't Recommendations must be received within twenty days after they are requested in order to be considered by the Planning Department in its recommendations concerning the proposed development permit. D. Qualifications of Investigators All engineering work prepared under the requirements of this regulation shall be prepared by or under the direction of a registered professional engineer, as defined in Section 12-25-101, et. seq., C.R.S. 1973. i• E. Exemptions These regulations shall not apply to land uses which do not involve any • of the following: 1. Human habitation 2. Concentrations of people, or :y: 3. Potential hazards to human life or property. Czes which would create or exacerbate flood hazard conditions on other --- o. - properties shall not be exempted. t - ._a► .-.. 23 21 - - -- -- A Hello