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0207 Land Improvement Standards 1979LAND IMPROVEMENT STANDARDS ORDINANCE Table of Contents Provision Page CHAPTER ONE- -TITLE, PURPOSE, SCOPE AND DEFINITIONS Short Title Purpose Interpretation Scope Definitions iNTERPRETATION, 1 1 1 1 1 CHAPTER TWO--ENGINEERING STANDARDS Application Enumeration of Standards 3 3 CHAPTER THREE--CONSTRUCTION SITE STANDARDS Application Enumeration of Standards 16 16 CHAPTER FOUR--AUGMENTATION, COMPLIANCE AND FEES Augmentation of Compliance Inspection Fees Standards 20 20 20 CHAPTER FIVE--ENFORCEMeNT AND RELIEF 2O CHAPTER SIX--MISCELLANEOUS PROVISIONS Severability Repeal of Conflicting Prior Ordinances Effective Date 21 21 21 ORDINANCE NO. 207 AN ORDINANCE OF THE CITY OF CHUBBUCK, IDAHO, PROVIDING LAND IMPROVEMENT STANDARDS; STATING A SHORT TITLE AND THE PURPOSE OF THE ORDINANCE; GUIDING INTERPRETATION OF THE ORDINANCE; SETTING FORTH THE SCOPE OF-THE ORDIN- ANCE; DEFINING THE TERMS USED IN THE ORDINANCE; PRE- SCRIBING ENGINEERING STANDARDS; PRESCRIBING CONSTRUCTION SITE STANDARDS; PROVIDING FOR AUGMENTATION OF STANDARDS, COMPLIANCE AND FEES; PROVIDING FOR ENFORCEMENT OF AND RELIEF FROM STANDARDS IMPOSED HEREIN BY PROCEDURES SET FORTH IN THE UNIFORM BUILDING CODE; REPEALING ALL CON- FLICTING PRIOR ORDINANCES AND PARTS THEREOF TO THE EXTENT ~OF SUCH CONFLICT; PROVIDING FOR THE SEVERABILITY OF THE PROVISIONS OF THIS ORDINANCE; AND ESTABLISHING THE EFFECTIVE DATE OF THIS ORDINANCE. BE IT ORDAINED BY THE MAYOR AND COUNCIL OF THE CITY OF CHUBBUCK, IDAHO: CHAPTER ONE TITLE, PURPOSE, INTERPRETATION, SCOPE AND DEFINITIONS SECTION 1-1: Short Title. This ordinance shall be known and may be cited as the "Chubbuck Land Improvement Standards ordinance." SECTION 1-2: Purpose. The purpose of this ordinance is to protect the public health, safety and welfare by establishing engineering standards for the design, installation, alteration or repair of improvements to land, and.by providing environ- mental protection and safety standards for construction sites. SECTION 1-3: Interpretation. This ordinance shall be construed liberally in the public interest to accomplish the foregoing purpose. SECTION 1-4: Scope. This ordinance shall apply to design, installation, alteration or repair of any improvements to lands which are open to public use, and to any construction sites, within the jurisdiction of the City of Chubbuck. SECTION 1-5: Definitions: For the purpose of this ordinance: A. "Block" means a piece or parcel of land or group of lots entirely surrounded by public street% streams, railroads, or parks, or a combination thereof. B. "Comprensive plan" means a plan with maps, charts and reports, together with any amendments thereto, adopted by the City Council in compliance with the Local Planning Act of 1975 set forth in the Idaho Code. C. "Condominium" means a development of land creating a scheme of interests in real property defined as a "condomunium" in the Idaho Code.' -1- D. "Development" means any activity enumerated in Section 1-4(B) of the Chubbuck Land Development Ordinance, as now in effect and as it may hereafter be amended. E. "Hillside development" means any development or that portion of a development located in terrain having a slope exceeding ten percent (10%). F. "Improvement" means any physical addition or change to land, which enhances the value of the land, which is incident to a scheme to develop the land, or which benefits other lands. G. "Irrigation facilities" means canals, laterals, ditches, conduits, gates, pumps, and allied equipment necessary for the supply, delivery, and drainage of irrigation water. H. "Lot" means a piece or parcel of land separated from other pieces or parcels by description, as on a record survey map, or by metes and bound~ for purpose of sale, lease, or separate use. I. "Pedestrian way" means a walk extending entirely through a block from street to street or providing access to a school, park, recreation area, residential neighborhood, or commercial~ or industrial area. J. "ProjecC'means installation of any improvement or the building of any structure upon land. K. "Street" means a way for vehicular traffic, except: (1) a parking lot or area for traffic movement within the parking lot, (2) a way that is less than one hundred fifty (150) feet in length; or (3) a way that serves or is intended to serve less than three (3) households. L. "Structure" means any construction or improvement, other than a driveway or other hard surface at ground level, upon or within land, and includes buildings, signs and walls or fences more than six (6) feet in height. M. "Uniform Building Code" means the latest edition of the Uniform Building Code and appendices thereto, published by the International Conference of Building Officials, which has been adopted by the Mayor and Council of the City of Chubbuck. N. "Utilities" means installations or facilities, underground or overhead, furnishing for the use of public electricity, gas, steam, communications, water, water drainage, sewage disposal, or flood control, owned and operated by any person, firm, corporation, municipal department, or board duly authorized by state or municiapl regulations, "Utility" or "utilities" as used herein may~also refer to such persons, firms, corporations, departments, or boards, as applicable herein. -2- CHAPTER TWO ENGINEERING STANDARDS SECTION 2-1:' Application. The following standards shall iapply to design, installation, alteration or repair of any improvements to lands which are open to public use within the jurisdiction of the City of Chubbuck. These standards are applicable to those residential areas where buildings are small and of. low height and where the ratio of the area occupied by buildings to lot area conforms to the latest city land use ordinance. For multi-story residential develop- ment;design standards shall be prescribed by the City Engineer based upon applicable national codes. SECTION 2-2: Enumeration of Standards. A. General Standards. 1. Streets: (a). The arrangements, character, extent, width~ grade, and location of all streets shall conform to the Comprehensive Plan, shall integrate harmoniously with existing and planned streets, shall be appropriate to topographical conditions, shall enhance the public convenience and safety, and shall facilitate the proposed uses of the land to be served by such streets. (b). Local residential streets shall be designed to discourage their use by through traffic. Where a development abuts or contains an existing or proposed arterial street (as described below), railroad, or limited access highway,'the CitY may require frontage streets, reverse frontage streets, or such other treatment for the appropriate use of the tract. (c). There shall be'provided rights-of-way of such width and as provided in the Comprehensive Plan; provided, however, that the width of said rights~of-way shall in no case be less than the following: Type of Street Right-of-Way Width · Arterial 80' 62' (major thoroughfare carrying traffic into and out of the City) Collector 66' 50' (medium density carrier of traffic between neighborhoods and districts of the City) Local 50' 36' (low density carrier of traffic within neighborhoods and districts of the City) Asphalt -3- %1' Types of .streets within a development shall be determined by the City Engineer, consistent with the compre- hensive plan. (d). Cul-de-sac streets shall terminate in a circular turn-around with a right-of-way radius of at least forty-five (45) feet. The City Engineer may approve an equally convenient form of turning space where extreme conditions justify. The maximum length shall not exceed four hundred (400) feet from the entrance to the center of a turn-around, unless the City Engineer finds that greater length will permit better development of the subject property. (e). Dead-end streets will not be approved except in locations designated by the City Engineer as necessary to future extensions in development of adjacent lands. In any case, a dead-end street serving more than four (4) lots shall provide by easement a temporary turning circle with a forty (40) foot radius or other acceptable design to accomplish adequate access. (f). Loop streets shall be limited to a maXimum length of two thousand (2,000) feet. (g). Streets shall be planned to intersect as nearly as possible at right angles, but in no event at less than seventy degrees (70o). Streets intersecting an arterial Shall do so at a ninety degree (90°) angle. (h). Where any street deflects at an angle of ten degrees (10°) or more, a connection curve shall be required having a minimum center line radius of three hundred (300) feet for arterial and collector streets and one hundred twenty-five (125) feet for local streets. (i). Streets with center line offsets of less than one hundred twenty-five (125) feet shall be avoided. (j). A tangent at least one hundred (100) feet long shall be provided between reverse curves on arterial and collector streets. (k). At street intersections, property line corners shall be rounded by a circular arc, said arc having a minimum tangent length of twenty (20) feet. (1). Street intersections with more than four (4) legs and Y-type intersections where legs meet at acute angles shall be avoided. "T" intersections, rather than "cross" intersections, shall be utilized to the maximum extent possible in residential developments. (m). Maximum and minimum grades for all streets shall be as determined by the City Engineer. (n). Alleys--twenty (20) feet, when single family residence units abut both sides: twenty-four (24) feet if abutting multiple family, commercial, or industrial districts~ Dead-end alleys shall be avoided. (o). Streets shall be extended to the boundary lines of the development, unless prevented by topography or other physical conditions or unless the City Engineer determines that such extension is not desirable for coordination'of the development with the existing layout or the most advantageous future development of adjacent tracts. However, streets carrying non-residential traffic, especially truck traffic, shall not normally be extended to the boundaries of adjacent existing or potential residential areas, or connected to streets intended for predominantly residential traffic. (p). Excessively long, straight local streets in residential areas, conducive to high-speed traffic, shall be prohibited according to the determination of the City Engineer. (q). Pedestrian walks on both sides of a street, within the street right-of-way, together with curbs and gutters.approved by the City Engineer, and paved vehicular traffic area, shall be required on all streets in a proposed development. (r). Accesses to streets shall conform to the "Standard Approach Policy" promulgated by the Division of Highways, Idaho Department of Transportation. 2. Blocks and Lots: (a) . Block lengths shall not exceed fifteen hundred (1,500) feet nor shall they be less than four hundred (400) feet; except when the average lot size is one-half (1/2) acre or more, in which case the maximum block length may be extended to a dimension reasonably determined by the City Engineer. (b). Block designs shall provide for two (2) tiers of lots, each facing upon a street, unless the City Engineer determines that such layout is not feasible. In addition'to pedestrian walks provided elsewhere in this chapter, dedicated pedestrian ways with right-of-way width of eight (8) feet or greater may be required where essential, as determined by the City Engineer, for circulation or access to schools, playgrounds, shopping centers, transporta- tion and other community facilities. -5- (c). The minimum area and dimensions of all lots shall conform to the requirements of the land use (zoning) ordinance of the City, as now in effect and as it may hereafter be amended, for the district in which the development is located. (d). The side lines of all lots, as far as possible, shall be right angles to the street which the lot faces, or approximately radial to the center of curvatures, if such street is curved. Side lines of lots shall be approximately radial to the center of curvature of a cul-de- sac on which the lot faces. (e). Lot widths shall conform to require- ments imposed by the City's' land use ordinance, as now in effect and as it may hereafter be amended; but in no event shall such widths be less than thirty (30) feet at the street right-of-way line. (f). Corner lots for residential develop- ment shall be so designed as to permit conformance to the street setback requirements of the land use (zoning) ordinance. (g). No lot shall be divided by a City limit line or the boundary line of a land use (zoning) district. Each such boundary line shall be made a lot line. (h). No remnants of land shall be left in the development which do not conform to lot requirements, or are not required, unless they are suitable and actually used for common open space, utility easements, or other public purpose. (i). Lots having frontage on two non-inter- secting streets shall be prohibited except where made necessary, as determined by the City Engineer, by topographic or other unusual conditions. (j). Lots intended for non-residential use, which are adjacent to existing or potential residential areas, shall have such additional depth and landscaped buffer as the City Engineer may determine, in order to maximize the compatability of the adjoining developments. 3. Landscaping: (a). The developer shall landscape all areas within the street right-of-way, not covered by pavement, curb, gutter or pedestrian walk. Trees and shrubs higher than three (3) feet from the surface of the ground shall not be planted or allowed to grow within thirty (30) feet of the street intersection on a ~corner lot. -6- (b). Whenever, as determined by the City Engineer, the cuts and fills in a hillside subdivision are of sufficient size or visibility to demand special treat- ment, the developer shall landscape such areas with suitable permanent plant materials and provide for their maintenance. 4. Utilities and other facilities: (a). New electric, communication and television lines shall be installed underground in accordance with standards prescribed by the City Engineer based' on applicable national codes. When facilities are installed in public rights-of-way, the location shall be approved by the City Engineer. When overhead utility lines exist within the property being developed, said existing overhead utility lines and additions or replacements needed to increase the capacity or to improve service reliability may remain over- head; provided, however, that any service drops into the platted area from said peripheral overhead lines shall be underground. When, as a result of development, it is necessary to relocate, renew, or expand existing facilities within the development area, the developer shall make the necessary arrangements with the serving utility for these installations to be placed underground. The developer shall be responsible for the cost of underground service lines including those serving approved street light locations. Electric lines with a capacity greater than three thousand (3,000) KVA (kilovolt amperes) are excluded from the requirements of this subparagraph. (b). All underground utilities shall be installed in street rights-of-way or utility rights-of-way and shall precede the surfacing of such streets. Service stubs to platted lots within the development for underground utilities shall be placed to such length as to render unneces- sary the disturbance of street improvements when service connections are made. If connected to a City-Qwned system, application and fees shall be the responsibility of the developer in accordance with City requirements. (c). Proper and adequate provision shall be made for disposal of storm waters. The type, extent, location and capacity of drainage facilities shall be determined for each development by the City Engineer. (d). Central sanitary sewer and water systems shall be installed in all subdivisions where they are within the service area of an existing public system and can be reached by reasonable extension of said public system. Con- struction plans and specifications for central sanitary sewer -7- and water system extensions shall be approved by the City Engineer and by the representative of any other governmental entity having proper jurisdiction. (e). If a development is not within the service area of an existing public sanitary sewer or water system, or otherwise cannot be reached by reasonable exten- sion of said public system, alternate provisions for water supply and sewage disposal shall be approved by the City Engineer and by the representative of any other governmental entity having proper jurisdiction. (f). Street lights shall be installed, at such locations and subject to such design standards as the city Engineer shall approve. 6~ The location and carrying capacity of all water, sewer and storm drainage lines or conduits shall be in compliance with the City's comprehensive plan for such facilities and shall be approved by the City Engineer. 7. Monuments shall be installed at locations prescribed by the City Engineer. 8. Access to all of the foregoing utilities and facilities, shall be provided by easements approved by the City Engineer, unless they are located within areas dedicated to the public. B. Supplementary Standards. 1. General: Any street improvements, sanitary or storm sewer installations, water installations or other installations of other utilities, and any of their appurtenant structures or equipment, that are damaged or destroyed as a result of construction shall be repaired or replaced promptly by the developer in compliance with directions of the City Engineer. 2. Street Grading and/or Alley Grading: '(a). Street grading shall be accomplished to the approved line, grade and cross-section. Maximum allowable street gradiant shall be as determined by the City Engineer. (b). On all portions of the work requiring embankment all undesirable materials shall be stripped prior tO placing of embankment materials. Embankments shall be con- structed in compacted layers not more than eight inches thick. Compaction shall be accomplished by use of rollers and the uniform application of Water resulting in a uniform and stable subgrade. (Density 90% Standard Proctor required) (c). All excavated areas shall be shaped and compacted prior to the application of subbase gravel. -8- (d)~ If borrow materials are required they shall be secured from sources containing earth or gravel materials of a quality not less than encountered on the site of the work. (e). The completed subgrade shall accurately conform to the lines, grades and typical cross-section for the type of work specified. 3. Compacted Gravel Subbase: (a). Minimum 6 inch compacted thickness required. Gravel materials shall be well graded (within the limits stated below), shall consist of hard, durable fragments of stone or slag, crushed.or uncrushed gravel materials; shall be placed in not to exceed four inch in depth well .compacted layers; may or may not require the addition of a soil or mineral binder for pr6per compaction, but if binder is required it shall be uniformly distributed throughout the entire volume of the gravel. Gravel materials shall be secured from previously approved sources. (b). Gravel for subbase shall conform to the following when tested in accordance with AASHTO Method T-27. Passing Passing Passing Passing Passing 3" square screen 100% 1" square screen 75-100% 1/4" square screen 40- 60% No. 10 Sieve 20- 40% No. 200 Sieve - not over 10% 4. Compacted Gr~vel Base: (a). Minimum 2 inch compacted thickness required. Gravel materials shall be well graded (within the limits stated below), shall consist of hard, durable fragments ~of stone or slag, crushed or uncrushed gravel materials; shall be placed in not to exceed four inch in depth well compacted layers; may or may not require the addition of a soil or mineral binder for proper compaction, but if binder is required it shall be uniformly distributed throughout the entire volume of the gravel. Gravel materials shall be secured from previously approved sources. (b). Gravel for base shall conform to the following when tested in accordance with AASHTO Method T-27. Passing 3/4" square sieve Passing 1/4" square sieve Passing No. 10 sieve Passing No. 200 sieve - not over 100% 40- 60% 20- 40% 10% -9- 5. Compacted Asphaltic Concrete Pavement: (a). Minimum 2 inch'compacted thickness required. Asphaltic concrete pavement shall consist of the construction of a one course pavement in conformity with the following and to the approved lines, grades and typical cross-section. State of Idaho, Department of Highways, Standard Specification, Section 905, shall be followed. (b). Materials: Aggregate shall be well graded within the following limits when tested in accordance with AASHTO Method Passing Passing Passing Passing Passing Passing Passing T-27. 3/4" screen 100% 1/2" screen 25- 65% #4 sieve 25- 40% #10 sieve 20- 33% #40 sieve 10- 25% #80 sieve 5- 15% #200 sieve 0- 5% Aggregate material may be either crushed stone, crushed or uncrushed gravel or slag. The course aggregate portion shall have a per cent of wear of not more than 45 at 500 revolutions, as determined by AASHTO Method T-96-~2 (Los Angeles Rattler Test). Asphalt cement shall be Penetration Grade 85-100 and shall conform to all requirements of State of Idaho, Department of Highways, Standard Specifications, Section 702, spot test to be excluded. Percentage of asphalt cement to total weight of aggregate shall be determined from the surface area and absorption of the aggregate and shall be between 4% 'and 8% of the total weight of the aggregate. 6. Portland Cement Concrete Curb and Gutter and/or Gutter: (a) · required, on all streets. by the City Engineer. (b). Concrete gutters will be required across those sides of street intersections having a grade of 6 percent or greater in those locations where drainage is continuous across the sides of the intersection. These gutters shall be continuous between integral curb and gutter and shall provide continuous flow from one side of the street to the other. (c). Concrete materials shall consist of approved Portland Cement, (6 bags of cement per cu. yd. of concrete), water, (maximum 6 gals, per bag of cement), Concrete curb and gutter will be The type of curb shall be determined -10- approved coarse and fine aggregate properly graded,~ and proportioned such that.aworkable mix and durable concrete is obtained. (d). Excavation, base and/or subbase, as required, shall conform to the corresponding sections of these specifications. (e). Forms maY be either wood or metal. If wood they shall be 2" plank, surfaced, one side. If metal they must be flat topped and of sufficient strength to resist springing during placing and compaction of concrete. All. forms shall be full size with approved spreaders and clamps and when assembled shall be mortar tight. (f). Curb and gutter may be machine laid, or hand formed and shall be constructed with approved full- depth cut crack control joints at ten (10) foot intervals, closures excepted, which shall be a minimum of 5 feet in length. (g). All curb and gutter shall be given a broom or wood float finish; "plastering" will not be allowed. (h). Concrete shall be protected for a period of two days by use~ofwet cotton burlap mats. Approved curing compound may be applied in lieu of mats. Concrete shall not be poured when ground is frozen; nor shall it be poured at any time when the City Engineer determines that danger of freezing is present, unless proper additivies and protective measures are provided, as approved by the City Engineer. 6. Concrete Driveways (within street rights- of-way): (a). Standard residential concrete drive- ways shall be no less than ten feet in width at curb line, exclusive of returns or transitions from 4 inch rolled to 6 inch rolled curb. (b). Concrete shall be a minimum 6 inches in thickness over minimum of four (4) inches of base course and shall be proportioned as for concrete curb and gutter. Surface to be given a wood float or light broom finish. (c). Curing shall be by use of wet mats for a period of two days or by use of approved curing compound. 7. Concrete Sidewalk: (a). The location of the sidewalk shall be determined from the type of curb and gutter required and the width of the dedicated or public street width. In general, where rolled curb and gutter is used the sidewalk shall be -11- constructed adjacent to the back of the curb and shall be a minimum of four (4) feet in width. Where barrier curb and gutter is used the. sidewalk shall be constructed adjacent to the curb and shall be a minimum of five (5) feet in width. All sidewalk shall be constructed with a slope of~ one- quarter inch per foot (1/4" : 1') from the property line to the top of curb such that drainage is toward the traveled way of the street. (b). Sidewalks shall be a minimum monolithic thickness of four (4) inches, except at driveway openings where the'minimum monolithic thickness shall be a minimum six (6) inches. Sidewalks shall have a minimum base of two inches (2") of sand, slag or gravel. Sidewalks shall have a wood float or light broom finish, and edges finished with a one-half inch radius edger tool and shall be marked off with approved crack control joints at five (5) foot intervals. One- half inch premolded expansion joint material shall be installed transversely at maximum 25 foot intervals, at each side of driveway approaches, and at all places where the sidewalk abuts other structures except longitudinal edge of curbs. (c). Materials for concrete (6 bags of cement per cubic yard) shall be as stated under Concrete Curb Gutter and/or Gutter. Forms shall be adequately constructed and secured as to grade and alignment and may be either wood or metal. Concrete shall not be poured when ground is frozen; nor shail it be poured at any time when the City Engineer determines that danger of freezing is present, unless proper additives and protective measures are provided, as approved by the City Engineer. 8. Sanitary Sewers: (a). All lateral sewers as required to adequately serve the are~ to be developed, and their connections to. present trunk or interceptor sewers, shall be constructed as required. Location of nearest trunk or interceptor sewer will be designated by the City Engineer. (b). Sewer systems shall meet with the "Sewage Works Design Standards" published by the Idaho Department of Health and Welfare except where conflicting design requirement are given below. Item Basis of Design Population ................... Determined by land use density Laterals .................... ~.150 Gal. per capita per day Industrial Plant ............. Add for process Minimum Slope of Pipe ........ To produce minimum velocity of 2 ft. per sec., pipe flowing full or half full Item Maximum Velocities ................. Manhole Spacing .................... Minimum Size Laterals .............. Manhole Size ....................... Lampholes .......................... Pipe, Types Basis of Design .6 to 16 ft. per second, de- pending on type of pipe .400 feet apart maximum, at changes in pipe size, or at changes of alignment or grade which cannot be accomplished with a minimum of 150 ft. constant radius curvatur~ in the sewer line. Manhole covers to be located 1/4" to 1/2" below finished grade of asphalt .8 inch diameter .48" diameter concrete, cast in place or precast reinforced. '24" diameter standard frame and cover required (cast iron) .Not permitted. All laterals to terminate with manholes .Proper grade as to strength and quality of concrete; cement asbestos (Transite); PVC plastic pipe conforming to ASTM D-3034, SDR35 or ABS plastic pipe schedule 40 may be used for laterals and service lines up to 8 in. dia. subject to the special back- fill requirements stated below. n, coefficient of roughness ......... 0.015 (Kutter or Manning) (c). All pipe to be laid true to line and grade with watertight joints. Pipe to be properly bedded to a height of at least one-half of its outside diameter. Trench to be backfilled in compacted 8 inch layers to 90%'of density (Standard Proctor). 'No rock or stone exceeding 3 inches in diameter shall be used in backfilling trenches up to 18" above pipe. No rock or stone exceeding 1 foot in diameter shall be used in backfilling the (d). subject to all fees and governing the same. (e). remainder of the trench. The subdivider or developer will be permits required by the City Ordinance Special backfill requirements will be required when PVC or ABS plastic sewer pipe is used. In these cases the pipe shall be bedded with sand, or compacted soil free of rocks and stones greater than 3/4" in diameter. This bedding shall extend from 4" below the pipe to 18" above the pipe. No rock or stone greater than 12" in diameter shall be used in backfilling the remainder of the trench. In ground containing large rocks or boulders all backfill materials to be segregated (rocks greater than 12" in diameter to be removed) and inspected by city engineer prior to backfilling. (f Ail sewer service lines to lots shall be marked with 2x4s the lengths of which are marked near the top. A minimum of 2 ft. of 2x4 should extend above ground after backfilling. The bottom of the 2x4 shall be located at the sewer invert elevation. The top of the 2x4 shall be painted with a bright fluorescent paint. 9. Storm Sewers: (a). bylthe City of Chubbuck, their connecting laterals, Storm sewer laterals, shall be constructed, as directed together with to existing trunk storm sewers or 'to such place or places storm waters. (b). using the following: Item as will adequately dispose of all Storm sewer systems shall be designed Basis of Design Q = Runoff ........................ Q = CIA A = Area, in Acres ................ As required C = Runoff = Coefficient ......... As determined by an acceptable Rainfall authority on same I = Intensity, inches/hr .......... One inch per hour Minimum Slope of Pipe ............. To produce minimum velocity of 2 ft. per sec. pipe flowing full or half full Max. Velocities ................... 6 to 16 ft. per sec. depending on type of pipe Manhole Spacing ................... 400 feet apart maximum, at changes in pipe size, or at changes of alignment or grade which cannot be accomplished with a minimum of 150 ft. constant radius curvature in the sewer line. Manhole covers to be located 1/4" to 1/2" below finished grade of asphalt Minimum Size Laterals ............. 12 inch diameter Manhole Size ...................... 48" diameter concrete, cast in place or precast reinforced 24 inch diameter. Standard frame and cover required. (Cast Iron) Pipe Types ........................ Proper grade as to strength and quality of: concrete; vitrified clay; cement asbestos (Transite) corrugated metal, galv., asbest~. bonded, asphalt dipped and pave6 n, Coefficient of Roughness ........ 0.015 (Kutter or Manning) Inlet frame and Gratings .......... Cast iron to City specifications Inlet Structures .................. Concrete directly connected to subject to all fees governing the samel manhol~ not more than 50 ft. (c). The subdivider or developer will be and permits required by City Ordinance dis -14- 10. Water Mains end. Service Lines: (a). Ail water mains, including appurten- ant valves, hydrants and connections to the City mains, shall be constructed as required by the "Idaho Drinking Water Stan- dards'' published by the Idaho Department of Health and Welfare. (b). In addition water mains shall meet the following design requirements. Item Basis of Design Size .'Min 6" I D (Min 6" I D Main to Hydrant) Pipe ............................. Cement lined ductile iron pipe, Class 50, manufactured and installed in compliance with latest American Water Works Association (AWWA) specifica- tions for same. Bell and spigot or mechanical type joints Fittings ......................... Cast Iron, Class 250 for water Valves ........................... Min. working pressure Water 175 (Including Auxiliary Fire' P.S.I. Iron body, double disc, Hydrant) Bronze Mounted Parallel Seat, non-rising stem, counter- clockwise opening, 2 inch square operating nut, in conformance with latest AWWA Specification for same. Fire Hydrants .................... Min. working pressure, water 175 (With Auxiliary Gate Valve P.S.I. .5 inch valve opening, two 2 1/2 inch hose nozzles, one and Valve Box) 4 1/2 inch pumper nozzle, left hand opening national standard 1 1/2 inch pentagon operating nut, fire hydrant red. Equipped with auxiliary gate valve and adjustable valve box. Ali to conform to latest AWWA specifi- cation for same. Valve Boxes Valve boxes shall be cast iron sliding'type, adjustable with extension of 3 to 5 feet. Bell end of lower section shall be minimum 9" dia. by 9" in depth. Shall be complete with drop covers lettered "water". Valve Spacing .................... All crosses or tees, Maximum 1,500 feet. Fire Hydrant Spacing ............. No lot frontage shall be located more-than 300 feet from a fire hydrant as measured within street right of way lines. Dead End Line .................... Not permitted. Thrust Blocks ........... ~ ........ All plugs, tees, bends, and fire hydrants must be installed with concrete reaction backing extending into unexcavated earth. Reaction backing must be installe~ such that the fitting is accessible for repairs. -15- Item Basis of Design Min. Depth Pipe Cover .......... 5 feet top of pipe to finished (Includes service lines) grade Fire Flow, Any P~int ........... 750 fals. per minute Minimum Pressure, Any Point .... 40 lbs. per sq. in. Tests Prior to Backfilling ..... Normal water pressure for (Includes all lines and period of 12 hours hydrants) Service Lines .................. Type K copper in accordance with (Regular fee to be paid Federal Spec. WW-T-799 with after application to approved Corporation (Mueller City) No. 15000 or equal), and curb stops (Mueller No. 15300 or equal), each line, complete with cast iron service box or lid plainly marked "Water", with regular pentagon operating nut. Meters...' ...................... To be furnished and installed by the City of Chubbuck. (Regular fee will be charged.) System Capacity ................ Minimum hourly demand of 150 gals. per hour per capita, plus simultaneous fire flow. (c). Ail installations shall be in accordance with A.W.W.A. specification for the same. Pipe shall be laid true to line and grade with adequate bedding. Backfilling shall be accomplished in minimum 8 inch compacted layers to 90% of density (Standard Proctor). Backfill materials shall not contain rock or stone exceeding 3 inches in diameter. CHAPTER THREE CONSTRUCTION SITE STANDARDS SECTION 3-1: Application. Ail grading operations and related site work in any development shall comply with the standards set forth in this section in addition to other requirements of this ordinance. SECTION 3-2: Enumeration of Standards. A. Hours of Operation: All grading operations in or contiguous to residential neighborhoods shall be carried on between the hours of 7:30 a.m. and 6:00 p.m. The City Engineer may authorize operations at other hours only if it is shown that restricting the hours of operation w6uld unduly interfere with the development of the property and if it is shown that the neighboring properties would not be adversely affected. B. Dust, Dirt and Materials Control: All graded surfaces and construction sites shall be dampened or suitably -16- contained to prevent dust or spillage of dirt, building materials and waste articles on city streets or adjacent properties. Equipment, materials and roadways on the site shall be used or treated so as to cause the least possible annoyance due to dust conditions. C. Slopes: The City Engineer may require the slope of a cut or fill be made more level if it is found that the material being cut or the fill is usually subject to erosion, or if other conditions make such requirements necessary for stability. The City Engineer may permit steeper slopes where the material being cut is unusually stable. D. Fill Material: All fill shall be ear~h, rock or other inert materials free from organic material, and free of metal, except that topsoil spread on cut and fi]]. surfaces may incorporate humus for desirable moisture retention pro- perties. E. Drainage: Adequate provisions shall b~. made to prevent any surface Waters from damaging the cut ~ace of an excavation or any portion of a fill. All draina~a ways and structures shall carry surface waters without p~oducing erosion to the nearest feasible street, storm drain or natural water course approved in advance by the City Engineer as a safe place to deposit and receive such waters. The City Engineer may require such drainage structures to be constructed, or installed, as necessary to prevent erosion damage or to prevent saturation of the fill or material behind cut slopes. F. Finished Cuts and Slopes: The exposed or finished cuts or slopes of any fill or excavation shall be smoothly graded. All exposed slopes of any cut or fill shall be protected by approved planting, crib walls or walls and planting, terracing, or a combination thereof. Graded surfaces shall be treated as provided in subparagraph (J) below. G. Back Fillings: Any pipe trench or other trenching or excavation made in any slope of any excavation or filled site shall be backfilled and compacted by a method approved by the City Engineer to the level of the surrounding grade. 'H. Compaction of Fills: Unless otherwise directed by the City Engineer, all fills, governed by this ordinance, intended to support buildings~ structures, or where otherwise required to be compacted for stability, shall be compacted, inspected and tested in accordance with the following provisions: -17- 1. The natural ground surface shall be pre- pared by removal of topsoil.and vegatation, and, if necessary, shall be graded to a series of terraces. 2. The fill shall be spread in a series of layers, each not exceeding eight (8) inches'in thickness, and shall be compacted by sheepsfoot roller or other approved method after each layer is spread. 3. The moisture.content of the fill material shall be controlled at the time of spreading and compaction to obtain required maximum density. 4. The fill material after compaction shall have a minimum dry density of not less than ninety (90) per- cent of maximum dry density in all portions of the fill requiring compaction, as determined by the AASHTO Soil Compaction Test Method T99-57 or T180-57, or other testing method approved by the City Engineer. 5. A written report of the compaction, showing location and depth of test holes, materials used, moisture conditions, recommended soil bearing pressures, and relative density obtained from all tests, prepared by a Civil Engineer or Soils Engineer licensed by the State of Idaho shall be submitted to the City Engineer. 6. The City. Engineer may require additional tests or information, if, in his opinion, the conditions or materials are such that additional information is necessary, and may modify or delete any of the above listed requirements that, in his opinion, are unnecessary to further the purpose of this ordinance. I. Erosion Control and Landscaping: All cut and fill surfaces created by grading except for fire break pur- poses shall be planted with a ground cover that is compatible with the natural ground covers in the City. Topsoils are to be stockpiled during rough grading and used on cut and fill slopes. When slopes too steep to support continuous ground cover have been permitted and in lieu thereof niches and ledges provided for planting, such slopes need not be planted with a continuous ground cover, but may instead be screened with vines and plantings. Cuts and fills along public roads may be required to be landscaped so as to blend into the natural 'surroundings. The existing on-site vegetation, including trees with a trunk diameter of four inches (4") or greater and other natural ground cover, shall be preserved to the maximum extent possible. J. Special Precautions: 1. If, at any stage of grading, the City Engineer determines by inspection that the nature of the formation is such that further work is likely to imperil any property, public way, watercourse or drainage structure, he may require, as a condition to allowing the work to be done, that such reasonable safety precautions be taken as is con- sidered advisable to avoid likelihood of such peril. Such precautions may include, but shall not be limited to, specifying a more level exposed slope, construction of additional drainage facilities, berms, terracing, compaction, or cribbing, installation of plant materials for erosion control, and reports of a registered soils engineer and/or of an accomplished engineer geologist whose recommendation may~be made requirements for further work. ~ 2. Where it appears that storm damage may result from work performed hereunder, the City Engineer may direct that the developer take such measures as may be necessary to protect adjoining property or the public safety. On large operations or where unusual site conditions prevail, the City Engineer may specify the time at which grading may proceed and the time of completion or may require that the operation be conducted in.specific stages so as to insure completion of protective measures or devices prior to the advent of seasonal rains. K. If the City Engineer determines that public facilities, or facilities to be dedicated to the public, are being damagedln the course of development, the Engineer may issue a directive to responsible parties that development work cease until the damage is repaired and safeguards adopted to prevent further damage. directive shall be entitled with respect to "stop work" Code. The City may enforce provided in said code. L. No development Parties adversely affected by such to hearing under procedures provided orders in the Uniform Building the Engineer directive in ~he manner shall be undertaken with respect to land that is subject to periodic flooding, poor drainage, excessive slopes or other terrain problems, unless special design and construction methods are implemented with the approval of the City Engineer and City Council, beyond the .standards provided in this section, in order to resolve such problems and to protect the public health, safety.and welfare. -19- CHAPTER FOUR AUGMENTATION, COMPLIANCE AND FEES SECTION 4-1: Aug~nenLation of Standards~ After ,:onsult- ing with the developer or builder, the City Engineer may direct that particular improvements be installed in com- pliance with such additional standards, consistent with applicable national codes, as are made necessary by multi- .story structures, heavy density or other special character- istics of the development or site in question. SECTION 4-2: Compliance. The City Engineer shall monitor compliance with the foregoing standards; and no developer or builder shall bury, cover or terminate work on any improvement prior to approval by the City Engineer. The developer or builder shall notify the City Engineer when an improvement, or series of improvements, is ready for inspec- tion; and the City Engineer shall cause the inspection to be conducted without undue delay. To assist the developer, the city Engineer may prepare a list of inspections that will be required. Monitoring, inspection and approval activities by the City Engineer shall not absolve the developer, builder and their agents of responsibility to comply with the standards. SECTION 4-3: Inspection Fees. The City Engineer shall recommend a schedule of reasonable fees for inspec'tions. The City Council shall, by resolution adopt such schedule or any amendment thereto. The adopted schedule shall be published at least once in the official newspaper of the City and posted in the City Offices. The developer and builder shall be jointly responsible for payment of fees set forth in a duly adopted schedule. CHAPTER FIVE ENFORCEmeNT AND RELIEF The standards prescribed in this ordinance shal] be enforced~ and relief from such standards may be granl.ed, in the manner set forth by the Uniform Building Code. In the event that the City commences and prevails in a ciyil action to enforce this ordinance, the City shall request and the court may award the City its costs, according to court rule, together with a reasonable attorney's fee, and such other or further relief as the court may deem just. -20- CHAPTER SIX MISCELLANEOUS PROVISIONS SECTION 6-1: Severability. If any provision of this ordinance is held invalid, for any reason, by any court of competent jurisdiction, such holding shall not affect the validity or enforceability of any of the remaining provisions. SECTION 6-2: Repeal of Conflicting Prior Ordinances. All prior ordinances and parts thereof, which cover the same subject matter governed by this ordinance, and which contain provisions in conflict with the provisions of this ordinance, are hereby repealed to the extent of such conflict. SECTION 6-3: Effective Date. The rule requiring ordinances to be read on three (3) separate occasions is hereby dispensed with and this ordinance shall become effective upon its passage, approval and publication as provided by law. PASSED BY THE COUNCIL AND APPROVED BY THE MAYOR of the City of Chubbuck, Idaho, this 29th day of June, 1979. MAYOR ATTEST: -21- LAND~ROVM~ENTS STANDARD ORD.# 207 CITY OF CHUBBUCK, IDAHO SUMMARY OF LAND IMPROVEMENT STANDARDS ORDINANCE NOTICE IS HEREBY GIVEN that the Chubbuck City Council has passed, and the Mayor has approved, Chubbuck City Ordinance No. 207, which shall be known and cited as the "Chubbuck Land Improvement Standards Ordinance." The ordinance becomes effective upon publication of this summary in the Idaho State Journal, the official newspaper of the City. The ordinance establishes engineering standards for the design, installation, alteration, or repair of improvements to land. It prescribes criteria for design of streets and layout of lots and blocks. It regulates landscaping and the design and location of utilities, sanitary sewer, water and storm drainage systems. The ordinance sets forth standards with respect to work practices, materials used and test and performance data for streets, curbs, gutters, sidewalks, driveways, sanitary sewers, storm sewers, water mains and service lines. The ordinance further provides environmental protection and safety standards for construction sites. It regulates hours of operation, dust and materials control and practices relating to slopes, cuts, fills, drainage and compaction. It provides for erosion control and landscaping. It authorizes the City Engineer to require special precautions to prevent property damage from excavation or grading and to alleviate weather-related hazards. It also empowers the City Engineer to commence legal process to stop work on projects where public facilities are exposed to potential damage or where'tOpographical characteristics require special design and construction methods. The ordinance provides for augmentation of standards in any of the foregoing areas by the City Engineer, consistent with applicable national codes, when made necessary by multi- story structures, heavy density of development or other special conditions. It authorizes the City Engineer to monitor compliance, to conduct inspections and to recommend a reasonable fee schedule for adoption by the City Council. It specifies that the developer, builder and their agents are responsible for compliance with this ordinance. The ordinance provides for enforcement and relief from its standards by incorporating procedures set forth in the Uniform Building Code (UBC). The UBC, in turn, provides civil injunctive and/or abatement remedies for noncompliance, and this ordinance authorizes imposition of costs and legal fees upon noncomplying developers or builders in such cases. The UBC permits developers or builders to apply for modifi- cations or standards, or for approval of alternate materials or methods, and sets forth the criteria for granting or denying such applications. The full text of this ordinance is available from the City Clerk at the Chubbuck City Offices, 5160 Yellowstone, Chubbuck, Idaho 83201. I hereby certify that the foregoing summary is true and complete, and that it provides adequate notice to the public. DATED this 29th day of August, 1979. Donald L. Burnett, Jr. City Attorney