Loading...
06-027 - O TOWN OF PROSPER, TEXAS ORDINANCE NO. 06-27 AN ORDINANCE OF THE TOWN OF PROSPER, TEXAS, AMENDING THOROUGHFARE AND CIRCULATION DESIGN REQUIREMENTS ORDINANCE NO. 05-50 TO RENAME THE ORDINANCE AND TO INCLUDE WATER AND SANITARY SEWER DESIGN REQUIREMENTS FOR THE PURPOSE OF PROMOTING THE HEALTH, SAFETY, AND WELFARE OF THE TOWN AND ITS RESIDENTS; PROVIDING FOR A PENALTY FOR THE VIOLATION OF THIS ORDINANCE; PROVIDING FOR REPEALING, SAVINGS AND SEVERABILITY CLAUSES; PROVIDING FOR AN EFFECTIVE DATE OF THIS ORDINANCE. WHEREAS, the Town Council of the Town of Prosper, Texas ("Town Council") has investigated and determined that it will be advantageous and beneficial to the Town of Prosper, Texas ("Prosper") and its inhabitants to amend the Thoroughfare and Circulation Design Requirements ordinance as set forth below; and WHEREAS, the Town Council has further investigated and determined that Prosper has complied with all legal requirements in adopting this Ordinance. NOW, THEREFORE, BE IT ORDAINED BY THE TOWN COUNCIL OF THE TOWN OF PROSPER, TEXAS: SECTION 1: Findings Incorporated. The findings set forth above are incorporated into the body of this Ordinance as if fully set forth herein. SECTION 2: Re-naminq the Thoroughfare and Circulation Design Requirements Ordinance. The Thoroughfare and Circulation Design Requirements Ordinance is hereby renamed as the Engineering Design Standards Ordinance. The Thoroughfare and Circulation Design Requirements will hereby be included as Section 1 of the Engineering Design Standards Ordinance. SECTION 3: Establishment of Water System Design Requirements. There is hereby established within the Engineering Design Standards Ordinance Water System Design Requirements for the purpose of promoting the health, safety, and welfare of Prosper and its inhabitants. The Water System Design Requirements are hereby established as Section 2 of the Engineering Design Standards Ordinance. The Water System Design Requirements are hereby established as set forth in Exhibit A, attached hereto and incorporated for all purposes. SECTION 4: Establishment of Sanitary Sewer System Design Requirements. There is hereby established in the Engineering Design Standards Ordinance Sanitary Sewer System Design Requirements for the purpose of promoting the health, safety, and welfare of Prosper and its inhabitants. The Sanitary Sewer System Design Requirements are hereby established as Section 3 of the Engineering Design Standards Ordinance. The Sanitary Sewer System Design Requirements are hereby established as set forth in Exhibit A, attached hereto and incorporated for all purposes. SECTION 5: Penalty Provision: Any person, firm, corporation or business entity violating this Ordinance, or as amended, shall be deemed guilty of a misdemeanor, and upon conviction thereof shall be fined a sum not exceeding Five Hundred Dollars ($500.00). Each continuing day's violation under this Ordinance shall constitute a separate offense. The penal provisions imposed under this Ordinance shall not preclude Prosper from filing suit to enjoin the violation. Prosper retains all legal rights and remedies available to it pursuant to local, state and federal law SECTION 6: Savinqs/Repealinq Clause: Should any part of this Ordinance be declared unconstitutional or invalid by a court of competent jurisdiction, it is expressly provided that any and all remaining portions of this Ordinance shall remain in full force and effect. All provisions of any ordinance in conflict with this Ordinance are hereby repealed; but such repeal shall not abate any pending prosecution for violation of the repealed ordinance, nor shall the repeal prevent a prosecution from being commenced for any violation if occurring prior to the repeal of the Ordinance. SECTION 7: Severability: Should any section, subsection, sentence, clause or phrase of this Ordinance be declared unconstitutional or invalid by a court of competent jurisdiction, it is expressly provided that any and all remaining portions of this Ordinance shall remain in full force and effect. Prosper hereby declares that it would have passed this Ordinance, and each section, subsection, clause or phrase thereof irrespective of the fact that any one or more sections,subsections, sentences,clauses and/or phrases be declared unconstitutional or invalid. SECTION 8: Effective Date: This Ordinance shall become effective upon its passage and publication as required by law. DULY PASSED AND APPROVED BY THE TOWN COUNCIL OF THE TOWN OF PROSPER, TEXAS on this 14th day of March, 2006. APPROVED A FO • ares Niswanger, ayor ATT TED TO AND CORRECTLY RECORDED BY: Shanae Jennings, wn Secretary EXHIBIT A Section 2: Water System Design Requirements Section 3: Sanitary Sewer System Design Requirements Town of Prosper—Engineering Design Requirements Section 2—Water System Design Requirements SECTION 2—WATER SYSTEM DESIGN REQUIREMENTS 2.1 GENERAL: A. Design criteria for all water systems shall comply with Texas Commission on Environmental Quality (TCEQ) Chapter 290(Rules and Regulations for Public Water Systems), latest revision. B. Railroad, State Highway and Dallas North Tollway crossings, etc., shall be as approved by the Town Engineer. Permits to agencies other than the Town must be submitted through the Town. C. The Engineer shall include on the design plans a summary of pipe sizes, pipe materials, and joint materials. D. Profile elevations shall be provided for mains twelve (12) inch in diameter and larger. Eight (8) inch mains may be required to be profiled by the Town Engineer. E. Where applicable, line sizes shall comply with the Water Distribution System Master Plan or subsequent revisions. F. Water mains shall be sized and extended through the limits of a development to serve adjacent properties. In phased construction of thoroughfares, the water main shall be extended the entire length of the thoroughfare being constructed. G. Construction Staking - Line and grade stakes for construction of all water mains and services shall be furnished by the developer's Engineer or their designated representative. Property lines and corners must be properly staked to ensure correct alignment. The Town will not be liable for improper alignment or delay of any kind caused by improper or inadequate surveys by the developer or by interference of other utilities. H. In the interpretation and application of the provisions of these standards, it is the intention of the Town Council that the principles, standards and requirements provided herein shall be minimum requirements for the development of property in the Town of Prosper,and where other ordinances of the Town are more restrictive,such other ordinances shall control. I. All deviations from the provisions presented herein shall be approved by the Prosper Town Staff which includes the Town Administrator, Town Engineer, Director of Planning and Development Services, Director of Public Works, Building Official, Town Fire Chief, and any others deemed necessary by the Town Administrator. If Prosper Town Staff denies a deviation request, the applicant may request in writing an appeal of the denial to be considered by the Town Council within thirty days from the submittal of the written request for appeal. 2.2 WATER MAIN LOCATION: A. Water mains sized twelve(12) inches and larger located in right-of-way shall be installed at least three (3)feet from the back of curb, or otherwise as directed by the Town Engineer. B. Water mains sized less than twelve (12) inches located in right-of-way shall be installed at a distance of two(2)feet from the back of the curb, or otherwise as directed by the Town Engineer. C. Water mains in right-of-way near storm inlets shall be constructed behind the inlet by pulling the pipe using longitudinal bending in accordance with the manufacturer's requirements. D. No water main shall be located nearer than four(4)feet from any tree. E. Water mains installed under creeks or ditches shall be protected by concrete encasement a minimum of ten (10) feet past the toe of the embankment on each side or otherwise as directed by the Town Engineer. F. Water lines crossing under storm sewers and sanitary sewers shall have a minimum of eighteen (18) 2-1 Town of Prosper—Engineering Design Requirements Section 2—Water System Design Requirements inches clearance below storm sewers and twenty-four (24) inches above sanitary sewer mains or otherwise as governed by TCEQ Chapter 290 requirements. Where minimum clearance cannot be achieved, water mains shall be encased six(6) inches thick in concrete,ten(10)feet either side of the utility crossing. G. When water mains are installed parallel to sanitary sewers and manholes, there shall be at least nine (9) feet of radial clearance outside to outside between the two, and the mains installed in separate trenches or otherwise as governed by TCEQ Chapter 290 requirements. 2.3 WATER MAIN SIZING: A. SINGLE FAMILY RESIDENTIAL: 1. Twelve (12) inch mains will be required to adequately supply the development. Typically along collector streets and other areas as determined by the Town Engineer. 2. Mains up to one thousand two hundred (1,200)feet in length or mains supplying one(1)or more fire hydrants shall be an eight(8) inch nominal size. 3. Dead-end mains are not allowed except by Town Engineer's approval. 4. For dead-end mains allowed by Town Engineer, the last two hundred (200) feet shall be eight (8) inch main serving less than seven (7) lots. A fire hydrant shall be installed at the end of the dead-end main for use by the Public Works Department. B. MULTI-FAMILY RESIDENTIAL: 1. Mains over six hundred (600) feet in length or mains supplying more than one (1) fire hydrant shall be twelve(12) inch. 2. Minimum size in any Multi Family shall be eight (8) inch. Water lines shall be extended to provide water to adjacent property as directed by the Town Engineer. 3. Six(6) inch fire hydrant leads shall not exceed one hundred (100)feet. 4. Dead-end mains are not allowed except by Town Engineer's approval. If dead-end mains are allowed, the developer shall install a fire hydrant at the end of the dead-end main for use by the Public Works Department. C. COMMERCIAL, SCHOOLS AND MANUFACTURING: 1. Mains over one thousand (1,000) feet in length, or mains supplying more than two (2) fire hydrants shall be twelve(12) inch. A fire service line shall be considered a fire hydrant. 2. Eight (8) inch mains may be used for fire hydrants located in parking lots not adjacent to buildings, but shall be looped. 3. Six(6) inch fire hydrant leads shall not exceed one hundred (100)feet. 4. Dead-end mains are not allowed except by Town Engineer's approval. If dead-end mains are allowed, the developer shall install a fire hydrant at the end of the dead-end main for use by the Public Works Department. 2.4 WATER MAIN MATERIALS: A. Upon prior approval by the Town Engineer, water mains twenty-four(24) inch in diameter and larger may be Reinforced Concrete Pretensioned Reinforcement (Steel Cylinder Type), complying with American Water Works Association Specifications C-303. B. All water mains sixteen (16) inch in diameter and larger may be ductile iron with joints that provide a recession in the bell for the employment of a single rubber gasket to be placed before the insertion of 2-2 Town of Prosper—Engineering Design Requirements Section 2—Water System Design Requirements the succeeding spigot. Minimum rated working pressure of the pipe shall be three hundred (300) psi for a twenty(20) inch main and two hundred-fifty(250) psi for larger mains. All fittings shall be ductile iron of the mechanical joint type with a minimum rated working pressure of two hundred-fifty(250) psi. 1. Polyethylene encasement is required to be installed around the ductile iron pipe and related fittings and valves. This wrap shall be an eight(8) mil. thickness polytube. Seams and overlaps shall be wrapped and held in place by two (2) inch wide plastic backed adhesive tape, Polyken 900 or Scotchrap no. 50, or an approved equal, with approximately two (2) foot laps on the polytube. The wrap on the barrel of the pipe shall be loose enough to allow the film to shift with the soil. The wrap shall be installed without breaks,tears, or holes in the film. C. PVC mains over twelve (12) inch shall be C905 DR18, twelve (12) inch shall be C900 DR18, and under twelve (12) inch mains shall be C900 DR18 with joints that provide a recession in the bell for the employment of a single rubber gasket to be placed before the insertion of the succeeding spigot. All fittings shall be ductile iron of the mechanical joint type with a minimum rated working pressure of two hundred-fifty(250) psi. All PVC mains shall be blue in color. D. All mains to be installed under existing roadway must be installed by bore. Rust resistant steel casing minimum one-fourth (1/4) inch thick shall be used with Raci patented casing spacers, or approved equal. No wood skids will be allowed. E. All fittings shall be restrained with Mega-lug or approved equal fittings. Joint material for PVC shall conform to ASTM F471. F. All valves, fittings, changes in elevation shall have concrete thrust blocks installed. Thrust blocking shall be minimum three thousand (3,000) psi concrete and be able to withstand a minimum two hundred (200) psi test pressure. Sack concrete is not permitted. G. All mains supplying fire sprinkler systems outside of utility easements shall be minimum two hundred (200) psi working pressure and U.L. listed. H. Connections to an existing line shall be made with full body ductile iron tapping sleeve and valve. In order to maintain a manageable parts inventory and working knowledge of tapping sleeve and valves, the following tapping sleeves are approved: Mueller,American Flow Control and U.S. Pipe. With prior approval by the Town Engineer, stainless steel Smith Blair 623 may be allowed for connection to existing lines twenty(20) inch or larger. I. Two(2)forty five(45)degree turns shall be used at corners along all mains. Ninety(90)degree turns are not permitted. 2.5 VALVES: A. The location of valves larger than twelve(12) inch will be as approved by the Town Engineer. B. Valves twelve (12) inch and under shall be placed on or near street property lines not over six hundred (600)feet apart in residential, duplex and apartment districts and not over five hundred (500) feet apart in all other districts; and in such a manner as to require preferably two (2), but not more than three (3) valves to shut down each main segment, or as may be required to prevent shutting off more than one (1) fire hydrant. Valves twelve (12) inch and under will be Resilient Seat Gate Valves (RSGV). Gate valves shall be open left and shall be in compliance with guidelines set forth by AWWA. Accepted gate valve manufactures are Clow, Mueller, or approved other. C. Sixteen (16) inch and larger valves shall be Butterfly Type. Manholes shall be constructed if required by the Town Engineer or his/her designee. D. On cross-feed mains without services, a maximum of four(4) valves shall be used to shut down each main segment. 2-3 Town of Prosper—Engineering Design Requirements Section 2—Water System Design Requirements E. Valves shall be placed at or near the ends of mains in such a manner that a shut down can be made for a future main extension without causing loss of service on the existing main. A minimum of twenty (20)feet of main shall be installed past the valve to anchor it. F. Where fire lines are connected to Town water lines, valves shall be installed on each side of the connection and on the fire line. G. Valve boxes shall be provided for buried valves. These boxes shall be three(3) piece screw type cast iron of the extension type and shall be similar to Mueller No. H-10360 or approved equal. The three (3) pieces shall consist of the top section, bottom section and cover. H. Contractor shall pour a reinforced concrete block twenty-four(24) inch by twenty-four(24) inch by six (6) inch thick around all valve boxes so the finished grade is level with the finished parkway. The size of the line shall be stamped into the concrete. I. All valves shall be marked with a saw on the curb or pavement with a "V". The "V" shall point to the location of the valve as follows: If the valve is in the paving, the "V" shall be marked upright; if the valve is outside the paving,the"V"shall be marked upside down. J. Valve boxes over four (4) feet deep will require extensions, or otherwise as directed by the Town Engineer. Valve box extensions shall be cast iron; PVC pipe is not allowed. K. In order to maintain a manageable parts inventory and working knowledge of valves, the following valves are approved: Mueller A2360 and Clow 6100—one hundred-fifty(150) psi test. 2.6 DEPTH OF COVER: The minimum cover to the top of the pipe must vary with the valve stem. In general, the minimum cover below the top of curb at street to top of the pipe should be as follows: A. Lines larger than sixteen (16) inch shall have a minimum of six (6) feet of cover which is sufficient to allow water and sewer and other utilities to go over the large main. B. Sixteen (16) inch mains shall have a minimum cover of five(5)feet. C. Twelve(12) inch and smaller mains shall have a minimum cover of four(4)feet. D. For water lines to be constructed along county-type roads built with a high crown and bar ditches about the surrounding property increase the cover as required to allow for future paving grade changes. E. Two(2) inch detector tape shall be installed six(6) inches above all buried mains. F. No piping or valves shall be covered until they have been inspected by the Town. 2.7 WATER SERVICES: A service shall be installed from the main to a point two (2) feet behind the curb line at a depth of twelve (12) inches, usually in advance of paving. After paving, the contractor shall furnish and install the meter box. The location of the meter box is at the side of the lot,two(2)feet off the property line of the front of the lot to be served. No meter box shall be installed in a paved area. On multiple apartments and business properties, the desired size and location is usually specified by the owners or architect. Each service location will be marked on the curb with a single vertical saw mark by the contractor. Minimum requirements for water services: A. Water meter boxes shall be provided for each service as per Town Specifications. 1. Meter boxes shall be plastic with a locking lid. 2. For one(1) inch meters the box shall be eighteen (18) by fourteen (14) inches. 2-4 Town of Prosper—Engineering Design Requirements Section 2—Water System Design Requirements 3. For one and a half(1%), two (2), and dual meters the box shall be twenty eight(28) by eighteen (18) inches. B. Minimum one (1) inch meter and one (1) inch 3408 polytube services with stainless steel inserts are required to serve all residential lots. For townhomes and duplexes, a minimum one (1) inch meter and service shall be provided to each of the family units. C. The size of apartment, condominium, or multi-family services will depend on the number of units served with a minimum of one(1) meter per building. D. Sand embedment shall be used around the pipe and corporation stop. E. All service saddles shall be epoxy coated brass with double bands and shall be Ford or approved other. F. All service taps on existing water mains that are two (2) inch or smaller should be made by the Public Works Department. G. Twin meters in parallel are not permitted. Generally, a single larger meter shall be selected. Bullhead connections are not permitted. H. Three(3) inch and larger meters are required to be in a concrete vault. I. A domestic service connection shall not be allowed on fire hydrant leads except as authorized by the Town Engineer. 2.8 FIRE HYDRANTS: There shall be sufficient hydrants to concentrate the required fire flow, as recommended by the publication, "GUIDE FOR DETERMINATION OF REQUIRED FIRE FLOW" published by the Insurance Service Office around any building with no hose line exceeding the distances hereinafter established and with an adequate flow available from the water system to meet the required flow. In addition, the following guidelines shall be met or exceeded: A. Residential and Nonresidential Property or Use: 1. Single Family Residential - As the property is developed, fire hydrants shall be located at all intersecting streets and at intermediate locations between intersections at a maximum spacing of five hundred (500) feet between fire hydrants as measured along the route that fire hose is laid by a fire vehicle. 2. Multi-Family Residential - As the property is developed, fire hydrants shall be located at all intersecting streets and/or fire lanes and at intermediate locations between intersections at a maximum spacing of four hundred (400) feet as measured along the length of the centerline of the roadway and/or fire lane. The front of any structure at grade shall be no further than five hundred (500) feet from a minimum of two (2) fire hydrants as measured along the route that a fire hose is laid by a fire vehicle. 3. Other Districts - As the property is developed, fire hydrants shall be located at all intersecting streets and at intermediate locations between intersections at a maximum spacing of three hundred (300) feet as measured along the length of the centerline of the roadway. The front of any building at grade shall be no further than three hundred (300) feet from a minimum of two (2)fire hydrants as measured along the route that the fire hose is laid by a fire vehicle. 4. Protected Properties - Fire hydrants required to provide a supplemental water supply for automatic fire protection systems shall be within one hundred (100) feet of the Fire Department Connection for such system. 5. Buildings Fire Sprinkled - An eight (8) inch fire line stub-out with valve shall be provided for all 2-5 Town of Prosper—Engineering Design Requirements Section 2—Water System Design Requirements buildings to be sprinkled. A smaller stub-out can only be used with Fire Department approval. The Town Fire Chief shall approve the vault,fittings, valves and double detector check,etc. 6. Fire hydrants shall be installed along all fire lane areas as follows: a. Non-Residential Property or Use: (i) Within one hundred-fifty(150)feet of the main entrance. (ii) Within one hundred (100)feet of any Fire Department connection. (iii) At a maximum intermediate spacing of three hundred (300) feet as measured along the length of the fire lane. (iv) Location of fire hydrants shall be outside radius of fire lanes and thirty-five (35) feet clear of all buildings. b. Apartment, Townhouse, or Cluster Residential Property or Use: (i) Within one hundred (100)feet of any Fire Department connection. (ii) At maximum intermediate spacing of four hundred (400) feet as measured along the length of the fire lane. (iii) Location of fire hydrants shall be outside radius of fire lanes and thirty-five (35) feet clear of all buildings. 7. In instances where access between the fire hydrant and the building that it is intended to serve may be blocked, extra fire hydrants shall be provided to improve the fire protection. Railroads, divided thoroughfares, expressways, blocks which are subject to buildings restricting movement and other man made or natural obstacles are considered as barriers. 8. In undeveloped areas, fire hydrants shall be spaced every twelve hundred (1,200) feet or as designated by the Town Engineer. B. Restrictions: 1. In order to maintain a manageable parts inventory and working knowledge of fire hydrants, the following hydrants are acceptable: Clow, Mueller, or approved other. Hydrants shall be equipped with storz type connection, shall be open left, and a minimum of five and one-fourth(5- 1/4) inch in size or approved other. 2. Fire hydrant leads shall have a bury depth equal to the depth of the water main serving the hydrant. 3. Valves shall be placed on all fire hydrant leads. It shall be a mechanical joint and flanged tee with a flanged end to mechanical joint gate valve so that the valve is anchored to the main. 4. Fire hydrants shall be installed so the breakaway point will be no less than two (2) inches, and no greater than six(6) inches above the final grade elevation. 5. Fire hydrants shall be located a minimum of two (2) feet and a maximum of six(6)feet from the fire lane or roadway, based on the location of the sidewalk. Fire hydrants shall not be located in the sidewalk. Fire hydrants shall be located on the same side of the street or fire lane as the main. All fire hydrants shall also be located on a two(2)foot by two(2) foot by six(6) inch thick concrete splash pad. 6. All fire hydrants placed on private property shall be adequately protected by either curb stops or concrete posts or other methods as approved by the Town Engineer and the Fire Department and shall be in easements. Such stops or posts shall be the responsibility of the landowner on 2-6 Town of Prosper—Engineering Design Requirements Section 2—Water System Design Requirements which the said fire hydrant is placed. 7. All fire hydrants shall be installed so that the steamer connection will face the fire lane or street or as directed by the Fire Department and/or Town Engineer. 8. Fire hydrants, when placed at intersections or access drives to parking lots, when practical, shall be placed so that no part of the fire truck will block the intersection or parking lot access when connections to the fire hydrant are made. 9. Fire hydrants required by this article and located on private property shall be accessible to the Fire Department at all times. 10. Fire hydrants shall be located at street or fire lane intersections, when feasible. 11. A Blue Stimsonite, Fire-Lite reflector model 88-SSA (or approved other) shall be placed just off center of the street or fire lane opposite fire hydrants. At intersections, reflectors shall be placed on both roadways opposite fire hydrant. 12. In non-residential developments an eight (8) inch lead will be required on all fire hydrants that are located more than one hundred (100)feet from the looped main. 13. All fire hydrants are to be painted with two (2) coats of Tnemec Series 43-38H Diffused Aluminum, Silver Paint. When a color code other than Tnemec Series 43-38H Diffused Aluminum, Silver is required,the top bonnet including the lip and all nozzle caps shall be painted the appropriate color. See Table 2.1 below. TABLE 2.1: Fire Hydrant Color (Based on Main Size) Water Main Size Color 6" Tnemec Series 43-38H Diffused Aluminum, Silver 8" Tnemec Series 2H Hi-Build Tneme-Gloss, True Blue Safety 12"&larger Tnemec Series 2H Hi-Build Tneme-Gloss, Safety Yellow C. Existing four (4) inch mains used for hydrant supply shall be replaced and dead-ends eliminated where practical. Six (6) inch lines shall be connected so that not more than one (1) hydrant will be between intersecting lines and not more than two (2) hydrants on an eight (8) inch main between intersecting lines. 2.9 WATER EASEMENTS: The following minimum width exclusive water easements are required when facilities are not located within public rights-of-way or easements: A. Water mains are to be located within the center of a minimum fifteen (15)foot water easement. B. Parallel easements and adjacent mains to right-of-way require approval by the Town Engineer. C. In residential developments, water mains shall not cross residential lots unless specifically approved by the Town Engineer or his/her designee, in which case the easement shall be located within a single lot. D. Fire hydrants located outside of public rights-of-way shall be encompassed by a ten (10) foot by ten (10)foot water easement. E. Two (2) inch and smaller meters serving multi-family residential and non-residential developments shall be set in a minimum five(5)foot by five(5)foot water easement or in the right-of-way. 2-7 Town of Prosper—Engineering Design Requirements Section 2—Water System Design Requirements F. Three (3) inch and larger meters shall be in a minimum ten (10)foot by ten (10) foot water easement and not in the right-of-way. 2-8 Town of Prosper—Engineering Design Requirements Section 3—Sanitary Sewer System Design Requirements SECTION 3-SANITARY SEWER SYSTEM DESIGN REQUIREMENTS 3.1 GENERAL: A. Design criteria for all sanitary sewer systems shall comply with Texas Commission on Environmental Quality(TCEQ)Chapter 317(Design Criteria for Sewerage Systems), latest revision. B. Sizes and grades for sanitary sewer shall be as required by the Town Engineer, and consideration shall be given as to possible extensions for future development. No sanitary sewers, other than laterals and force mains, shall be less than eight(8) inch in diameter. C. Railroad, State Highway, Tollroad crossings, etc... in addition to connections to NTMWD shall be as approved by the Town Engineer. Permits to agencies other than the Town must be submitted through the Town. D. The Engineer shall include on the design plans a summary of pipe sizes and pipe materials. E. All grades shall be shown to the nearest one hundredth (0.01)of a foot. F. Where applicable, line sizes shall comply with the Sanitary Sewer Layout Master Plan or subsequent revisions. G. Sewer lines shall be sized and extended through the limits of a development to serve adjacent properties. In phased construction of thoroughfares, the sewer lines shall be extended the entire length of the thoroughfare being constructed. H. Construction Staking - Line and grade stakes for construction of all mains and laterals shall be furnished by the developer's Engineer or their designated representative. Property lines and corners must be properly staked to ensure correct alignment. The Town will not be liable for improper alignment or delay of any kind caused by improper or inadequate surveys by the developer or by interference of other utilities. I. In the interpretation and application of the provisions of these standards, it is the intention of the Town Council that the principles, standards and requirements provided herein shall be minimum requirements for the development of property in the Town of Prosper,and where other ordinances of the Town are more restrictive,such other ordinances shall control. J. All deviations from the provisions presented herein shall be approved by the Prosper Town Staff which includes the Town Administrator, Town Engineer, Director of Planning and Development Services, Director of Public Works, Building Official, Town Fire Chief, and any others deemed necessary by the Town Administrator. If Prosper Town Staff denies a deviation request, the applicant may request in writing an appeal of the denial to be considered by the Town Council within thirty days from the submittal of the written request for appeal. 3.2 SEWER LINE LOCATION: A. If feasible, sewers shall be placed in streets under paving. Sewers are usually located in the center of the street. Each project is unique;therefore, no fixed rules will apply to all cases. B. No public sewer line shall be located nearer than five(5)feet from any tree. C. No sanitary sewer shall be located in alleys unless approved by the Town Engineer. 3.3 SEWER LINE MATERIALS: A. The material used for the sanitary sewer shall be designed for a minimum structural life cycle, of fifty (50) years. If the pipe material will deteriorate when subjected to corrosive conditions, the Engineer shall provide, for an acceptable corrosion resistant liner or provide calculation and data that 3-1 Town of Prosper—Engineering Design Requirements Section 3—Sanitary Sewer System Design Requirements demonstrated that the design and operational characteristics will provide for the minimum life cycle. B. All gravity sewer pipe shall be in green in color. Four (4) inch to fifteen (15) inch pipe shall be PVC SDR 35 or 26 (ASTM D3034). Eighteen (18) inch and larger pipe shall be PVC ASTM F679. PVC fittings may be either green or white in color. C. Ductile Iron Pipe, minimum class 51 or 52, shall be used for all aerial crossings. It may also be used on a case by case basis with written approval from the Town Engineer. D. Reinforced Concrete Pipe is allowed only on a case by case basis and then only, on lines larger than thirty(30) inches in diameter. The Town of Prosper will issue written approval for use of RCP on those projects. E. All mains to be installed under existing roadway should be installed by bore unless otherwise approved by the Town Engineer. Rust resistant steel casing minimum one fourth (1/4) inch thick, or thicker if deemed necessary by the design engineer, shall be used with Raci patented casing spacers, or approved equal. No wood skids will be allowed. F. Vitrified clay pipe will not be allowed in the Town of Prosper. G. PVC pipe used for force mains shall be white in color. Twelve (12) inch and smaller pipe shall be ASTM 2241 SDR 21. Pipes larger than twelve(12) inch shall be C905 DR25. H. Profile wall pipe shall not be permitted in the Town of Prosper without written authorization by the Town Engineer. If allowed by the Town Engineer, twenty four (24) inches and larger profile wall pipe shall conform to ASTM 794 and the Town of Prosper specifications. "Helically wound" or "pipe stiffness series 10" profile wall pipe will not be allowed. 3.4 CLEANOUTS AND MANHOLES: A. The sizes and locations of manholes, wyes, bends, tap connections, cleanouts, etc., shall be approved by the Town Engineer. In general, manholes shall be placed at all four(4) way connections and three (3) way connections, changes in grade and direction, and at a maximum spacing of three hundred (300)feet. B. In order to provide access to sewer lines for cleaning, manholes and/or cleanouts shall be so located that one hundred and fifty (150) feet of sewer rod can reach any point in the line. Spacing between a manhole and an upstream cleanout shall be limited to three hundred (300) feet. Cleanouts may be located at the end of the line or on a line that may be extended in the future. C. Manholes shall have a 400# traffic bearing frame and cover with a design strength of 4000 psi at twenty eight (28) days. Manhole frame and covers shall be Bass & Hayes #400-24 with the Town of Prosper Logo on the cover. D. Drop manholes shall be required when the inflow elevation is more than twenty four(24) inches above the outflow elevation. Drops shall be located outside the manhole with its flowline elevation located between the centerline and top of sewer main. E. The diameter of a manhole constructed over the center of a sewer should vary with the size of the sewer. The manhole diameter for all line sizes up to twenty seven (27) inches shall be a minimum of five (5)feet. The manhole diameter for all line sizes over twenty seven (27) inches shall be a minimum of six(6)feet. F. In Flood Plains, sealed manholes "Type S" with a Bass & Hayes casting shall be used to prevent the entrance of storm water. Where more than three (3) manholes in sequence are to be bolted and gasketed, every third (3rd) manhole shall be vented two (2) feet above the one hundred (100) year floodplain elevation or ten (10)feet above the adjacent ground line, whichever is higher. The Engineer 3-2 Town of Prosper—Engineering Design Requirements Section 3—Sanitary Sewer System Design Requirements shall provide the elevation of the one hundred (100) year flood. Sealed manholes shall also be used in all areas subject to carrying drainage flow or in drainage ways. G. Where pipes enter a manhole there shall be a minimum of one tenth (0.1) of a foot drop between inverts. Where unequal size pipes enter a manhole,crown of pipes should be at the same elevation. H. Manholes shall have inflow protection inserts, minimum thickness of one eight (1/8) inch, made of HDPE meeting ASTM D 1248 Class A, Category 5, Type 111. Insert shall include a lift strap and vent hole with vent disk as manufactured by Knutson Manhole Inserts or approved other. I. Construct manholes at each end of lines that are installed by other than open cut and at each end of aerial crossing lines. J. A property line cleanout shall be installed for all residential services. Cleanouts in the sidewalk or driveway shall have a cast iron boot. Cleanouts not located in a sidewalk or driveway shall be located on a reinforced concrete pad a minimum of twelve (12) inches by twelve (12) inches by six (6) inches thick. All property line cleanouts shall include a lid that is green in color. 3.5 CURVED SEWERS: A. No vertical curves will be allowed. B. Horizontal curvature may be by joint deflection or pipe flexure but not both. The Engineer must specify on the plans the method of deflection allowed and the allowable radius or joint deflection for each pipe size. C. When pipe flexure is used, the minimum radius of curvature shall be equal to that recommended by the pipe manufacturer or 300*Do, where Do, is the average outside diameter of the pipe in inches, which ever is greater. The Engineer shall note on the plans that, when using pipe flexure, all joints are to remain fully seated. D. If joint deflection will be used to provide horizontal curvature, the allowable deflection shall be eighty (80) percent of the Manufacturer's recommended maximum joint deflection, or eighty (80) percent of the National Reference Standard ASTM criteria maximum recommended joint deflection or by TCEQ Criteria, whichever is less. In no case shall the radius be less than two hundred (200)feet. E. Horizontal curves for sanitary sewers running lateral with public right-of-ways shall match change in street direction as near as possible. Horizontal curves will not be allowed across residential single family and duplex lots, without prior approval from the Town Engineer. F. Manholes on curved sewers shall be located at the P.C. or P.T. of the curve and a maximum spacing of three hundred (300)feet along the curve. Sewage flow shall be computed in accordance with Table 3.1 shown below,with the exceptions, as required by the Town Engineer. G. The minimum acceptable "n"factor for use in design of sanitary sewers shall be 0.013. Pipes should be placed on such a grade that the velocity is not less than two (2) fps or more than ten (10) fps. Minimum grades based on n =0.013 shall be as shown on Table 3.2 below. 3.6 DEPTH OF COVER: A. Minimum cover shall be four (4) feet. In general, the minimum depth for sewer to serve a given residential property with a four (4) inch lateral shall be three (3) feet, plus two (2) percent, times the length of the house lateral (the distance from the sewer to the center of the house). Thus, for a house one hundred thirty five(135)feet from the sewer, the depth would be three(3)feet, plus two(2) percent x one hundred thirty five(135)feet= 3.0 +2.7=five and seven tenths(5.7)feet. The depth of the flow line of the sewer should then be at least five and seven tenths (5.7) feet below the elevation of the ground at the point where the service enters the house. Profiles of the ground line twenty (20) feet 3-3 Town of Prosper—Engineering Design Requirements Section 3—Sanitary Sewer System Design Requirements past the building line will be required to verify that these criteria are met. B. The Town Engineer shall authorize any exceptions. Concrete protection may be required. C. On lines deeper than twelve (12) feet, a parallel sewer line will be required when laterals are to be attached. D. Two(2) inch detector tape shall be installed six(6) inches above all buried sewer lines. E. No piping or valves shall be covered until they have been inspected by the Town. 3.7 LATERALS: The sizes and locations of laterals shall be designated as follows unless otherwise directed by the Town Engineer: A. In general, for single family dwellings, the lateral size shall be a four(4) inch minimum. House laterals shall be installed ten (10) feet downstream from the center of the lot and shall have a ten (10) foot separation from the water service. All residential sewer services shall be extended to a point ten (10) feet from the back of the property line at a maximum depth of five (5) feet. The service shall then be extended at a forty five(45)degree angle to four(4)feet above the finished grade and capped. B. Multiple units, apartments, local retail and commercial—six(6) inch minimum. C. Manufacturing and industrial—eight(8) inch minimum, or larger as required. D. Manholes will be required on six(6) inch and larger laterals where they connect to the main line. E. Laterals will not be attached to sewer mains that are deeper than twelve(12)feet. F. Fittings are not permitted on laterals between the wye and the property line. G. Deep cut or drop connections shall not be permitted. H. A minimum of one (1) lateral per building shall be required. Also, a minimum of one (1) lateral per residential lot shall be required. Duplexes shall have two (2) laterals that shall be independently attached to the main. I. All mains installed in future developed areas shall install laterals;the use of boots will not be permitted. J. All sewer laterals crossing water mains shall conform to the requirements of the Texas Commission on Environmental Quality(TCEQ)Chapter 317(Design Criteria for Sewerage Systems), latest revision. 3.8 TESTING: All sanitary sewer lines shall be tested for infiltration and exfiltration in accordance with standard specifications and as shown on the plans. Video camera inspections, low pressure air testing, vacuum testing of the manholes and mandrel testing are required on all sewer lines. In addition, all residential and commercial sanitary sewer services shall have video camera inspections. All testing shall be completed, reviewed and approved by the Town of Prosper prior to any initiation of sub-grade work. 3.9 SANITARY SEWER LIFT STATIONS: Subdivisions will be laid out so that all sanitary sewer lines will be gravity flow lines when possible. If the use of a sanitary sewer lift station is approved, the lift station will be connected to the Town's Systems Control and Data Acquisition (SCADA) system. The developer will pay all cost associated with the SCADA to include all labor, equipment, materials, and programming of the Town's computer and testing. The SCADA equipment installed shall conform to the standard as noted per this section — Computerized Monitoring and Control Specifications for Sanitary Sewer Lift Stations. 3-4 Town of Prosper—Engineering Design Requirements Section 3—Sanitary Sewer System Design Requirements 3.10 SANITARY SEWER EASEMENTS: The following minimum width exclusive sanitary sewer easements are required when facilities are not located within public rights-of-way or easements: A. Sanitary sewers are to be located within the center of a fifteen (15)foot sanitary sewer easement. B. In residential developments, sanitary sewer mains shall not cross residential lots unless specifically approved by the Town Engineer or his/her designee, in which case the easement shall be located within a single lot. C. For sanitary sewer lines deeper than ten (10)feet, the easement width shall be equal to one and a half (1'/%) times the depth of the line rounded up to the nearest five (5)feet. Thus, for a sanitary sewer line twelve (12) feet deep, the sanitary sewer easement would be one and a half(1%) x twelve (12) feet = 1.5 x 12=eighteen (18)feet, rounded up to the nearest five(5)feet=twenty(20)feet. 3.11 TABLES: TABLE 3.1: Sanitary Sewer Daily Flow Calculations (Design for Peak Flow) Land Use Design Calculation • 100 gallons per person per day. (100 x 15 x 3 x daily peak factor) +infiltration = Apartment • 15 units per acre. (100 x 15 x 3 x 3) +650= 14,150 gallons per acre per day. • 3 persons per unit. • 100 gallons per person per day. (100 x 3.5 x 3.5 x daily peak factor) +infiltration = Residential • 3.5 units per acre. (100 x 3.5 x 3.5 x 3)+650=4,325 gallons per acre per day. • 3.5 persons per unit. Town • 100 gallons per person per day. (100 x 10 x 3.5 x daily peak factor)+infiltration = Home • 10 units per acre. (100 x 10 x 3.5 x 3) +650= 11,150 gallons per acre per day. • 3.5 persons per unit. Hospital • 200 beds. (200 x 200) +infiltration= • 200 gallons per day per bed. (200 x 200) +650=40,650 gallons per day. Nursing • 150 beds. (150 x 90) +infiltration = Home • 90 gallons per day per bed. (150 x 90) +650= 14,150 gallons per day. Commercial/ • 3,100 parking spaces per 34.7 acres. 3,100/34.7 acres=90 persons per acre Industrial/ • 1 person per parking space. (90 x 35)+ infiltration = Office • 35 gallons per person per day. (90 x 35)+650= 3,800 gallons per acre per day. Note: Infiltration shall be 650 gallons per acre per day(GPAD) and the daily peak factor shall be 3 or based on time of concentration calculations as approved by the Town Engineer. 3-5 Town of Prosper-Engineering Design Requirements Section 3-Sanitary Sewer System Design Requirements TABLE 3.2: Minimum and Maximum Grades for Sanitary Sewer Mains Size of Pipc Minimum Slope in Horizontal Curve Maximum Slope in (Inches) (Percent) (Percentl (Percent) 8 0.33 0.35 8.40 10 0.25 0.27 6.23 12 0.20 0.22 4.88 15 0.15 0.17 3.62 18 0.11 0.13 2.83 21 0.09 0.10 2.30 24 0.08 0.09 1.93 27 0.06 0.07 1.65 30 0.055 0.065 1.43 33 0.05 0.06 1.26 36 0.045 0.055 1.12 39 0.04 0.05 1.01 >39 Note: For lines larger than thirty-nine inches (39") in diameter, the slope shall be determined using the following equation to maintain a minimum velocity of two feet per second (2 fps)and a maximum velocity of ten feet per second (10 fps). V = (1.486/n)•(R213).(S112) Where: V = Velocity of flow in conduit in feet per second. n = Roughness coefficient of the conduit, dimensionless. R = Hydraulic radius of the conduit in feet, which is the area of the flow divided by the wetted perimeter(R=A/P). S = Slope of the hydraulic gradient in feet per foot. 3-6 AFFIDAVIT OF PUBLICATION STATE OF TEXAS COUNTY OF DALLAS Before me, a Notary Public in and for Dallas County, this day personally appeared Lynda Black, Legal Advertising Representative for the DALLAS MORNING NEWS being duly sworn by oath, states the attached advertisement of: Town of Prosper as published in The Dallas Morning News—Metro Collin County Edition on: ( ) ( L ) TOWN OF TOWN OF . PROSPER, TEXAS PROSPER, TEXAS ORDINANCE NO.06-27 ORDINANCE NO. 06-27 March 22, 2006 AN ORDINANCE OF AN ORDINANCE OF March 23, 2006 THE TOWN OF PROS- THE TOWN OF PROS- PER, TEXAS, AMEND- PER, TEXAS, AMEND- ING THOROUGHFARE ING THOROUGHFARE AND CIRCULATION DE- AND CIRCULATION DE- SIGN REQUIREMENTS SIGN REQUIREMENTS ORDINANCE NO. 05-50 ORDINANCE NO. 05- 0 TO RENAME THE OR- TO RENAME THE O - DINANCE AND TO IN- DINANCE AND TO I CLUDE WATER AND CLUDE WATER AND SANITARY SEWER DE- SANITARY SEWER DE- / SIGN REQUIREMENTS SIGN REQUIREMENTS FOR THE PURPOSE OF FOR THE PURPOSE OF / PROMOTING THE PROMOTING THE HEALTH,SAFETY,AND HEALTH,SAFETY,AND WELFARE OF THE WELFARE OF THE TOWN AND ITS RESI- TOWN AND ITS RESI- DENTS; PROVIDING DENTS; PROVIDING (Lynda Black) FOR A PENALTY FOR FOR A PENALTY FOR THE VIOLATION OF THE VIOLATION OF THIS ORDINANCE; THIS ORDINANCE; PROVIDING FOR RE- PROVIDING FOR RE- PEALING, SAVINGS PEALING, SAVINGS AND SEVERABILITY AND SEVERABILITY CLAUSES; PROVIDING CLAUSES; PROVIDING FOR AN EFFECTIVE FOR AN EFFECTIVE DATE OF THIS ORDI- DATE OF THIS ORDI- NANCE. sworn to and subscribed before me this March 23, 2006, A.D �%.`o TTE/l��ii� (Lisa Batte eld) ,,� v4P. !V�, ... hR RFY - --,' �-", -ib Qi •' 1 s 'C. 1, 4 ®•��‘ '�Lil7ull"