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Ord 63 Regulating the Construction or Repair of Water or Sanitary Sewer Improvements including feesORDINANCE NUMBER 63 AN ORDINANCE OF THE TOWN OF WESTLAKE REGULATING CONSTRUCTION OR REPAIR OF WATER OR SANITARY SEWER IMPROVEMENTS; REQUIRING PERMIT, AND FEES THEREFOR; REQUIRING BOND, REQUIRING SUPERVISION AND APPROVAL OF. WORK; DECLARING EMERGENCY; BE IT ORDAINED BY THE CITY COUNCIL OF THE TOWN OF WESTLAKE, TEXAS, that: SECTION 1. COUNCIL TO DETERMINE NATURE AND EXTENT OF IMPROVEMENTS. The City Council shall, from time to time, fix and determine the nature and extent of water and/or sanitary sewer improvements and the kind of material and construction in such improvements. SECTION 2. PERMIT. No person shall construct, reconstruct, alter, repair, remove or replace any water or sanitary sewer improvements on any public property within the city limits, without first obtaining from the engineering department a permit so to do. No such permit shall be granted unless the two (2) year maintenance bond pro- vided for in Section 4 is in full force and effect at the time of request for such permit and the doing of the work. SECTION 3. PERMIT FEES. No person shall be granted a permit to construct, reconstruct, alter, repair, remove or replace any water or sanitary sewer improvements on any public prop- erty, without paying certain fees to the city for inspection of such work, as follows: (a) Water system - 1% of total contract price. (b) Sanitary sewer system - 190 of total contract price. SECTION 4. BOND REQUIRED. No person shall construct, reconstruct, or repair any water or sanitary sewer improvements in the city without executing and delivering to the city a bond in the sum of $10,000 for each $100,000 of construction work performed, payable to the Town of Westlake, Tarrant and. Denton Counties, Texas, from an approved surety company. Such bond shall be conditioned that all work done in the construction, recon- struction, or repair of any water or sanitary sewer improvements shall be done in a good and workmanlike manner, and that such person shall faithfully and strictly comply with the specifications and with the terms of the City Code and such ordinances, resolutions or regulations that may be passed by the City Council governing and relating to the construction, reconstruction, or'repair Ordinance No. 53_ - 2 of any water or sanitary sewer improvement, and that the city shall be fully indemnified and be held whole and harmless from any and all costs, expense or damage, whether real or asserted, on account of any injury done to any person or property in the prosecution of such work, or that may arise out of or be occasioned by the performance of such work. Such bond shall be condi- tioned further that the principal shall, without additional cost to the per- son for whom the work was done, maintain all water and sewer improvements so constructed, reconstructed, or repaired by the principal for a period of two (2) years from the date of final acceptance of such construction, reconstruc- tion or repair to the satisfaction of the engineering department of the city, and shall reconstruct or repair any water or sanitary sewer improvement to the satisfaction of the engineering department of the city at any time within two (2) years after the final acceptance of the construction, reconstruction, or repair of any water or sanitary sewer improvement and after ten (10) days notice from the engineering department to reconstruct or repair the same, and that the opinion of the engineering department as to the necessity of such re- construction or repair shall be binding on the parties thereto. Such bond shall, for the purposes mentioned above, be in force for two (2) years after the final acceptance of any water or sanitary sewer improvement which is constructed, reconstructed, or repaired and one recovery shall not exhaust the bond, but such bond shall be a continuing obligation against the sureties thereon until the entire amount therein provided for shall have been exhausted. In case the bond shall be decreased on account of any recovery which may be obtained, arising out of the violation of any condition of the same, the City Council shall require, upon notice to it of such fact, an addi- tional bond to be given in accordance with this section in an amount suffi- cient, when added to the nonexhausted amount of the original bond, to be at all times equal to the sum of $10,000 for each $100,000 of the construction work performed. The city may, for itself or for the use and benefit of any person injured or damaged by reason of any defective construction, reconstruction, or repair of any water or sanitary sewer improvement by any person, maintain suit on such bond in any court having jurisdiction thereof, or suit may be maintained thereon by any person injured or damaged by reason of the failure of any person who shall construct, reconstruct, or repair any water or sanitary sewer improvement in the city to observe the conditions of such bond. SECTION 5. SPECIFICATIONS. Water and sanitary sewer improvements shall be constructed, reconstructed, or repaired in accordance with water and sanitary sewer specifications for the city, attached hereto as Exhibit A and on file in the office of the City Engineer. SECTION 6. SUPERVISION AND APPROVAL OF WORK. All work in construction, reconstruction, and repairing of water and sanitary sewer improvements shall be done under the supervision and subject to the di- rection and approval of the city engineering department whose decision shall be final. Ordinance No. 63 - 3 - SECTION 7. EMERGENCY CLAUSE. In carder to protect the health, safety and welfare of the citizens of the Town of Westlake, this Ordinance is hereby adopted as an emergency measure and shall be in full force and effect from and after this date of passage. PASSED AND APPROVED THIS ,, day of � 197 APPROVED: 6 � N fC ani_ Mayor ATTEST: City SecretXry EXHIBIT A TOWN OF WESTLAKE SPECIFICATIONS FOR THE INSTALLATION OF WATER AND SEWER MAINS I. TRENCHING AND BACKFILL A. General: This work shall include the furnishing of all labor, materials, tools, equipment and machinery necessary for clearing and removing stumps, brush, vegetation, and debris, and all earth, rock, and other materials to be excavated; the stripping or removal of topsoil ar sod to be piled sepa- rately from other excavated materials and later to be restored to its orig- inal place after backfilling is completed; the furnishing, placing, and maintaining of all sheeting, shoring and bracing necessary to protegt the work and adjacent properties; all -pumping, bailing and draining necessary to keep the excavation free from seepage water, water from sewers, drains, ditches, creeks, and other sources; provision for the uninterrupted flow of sewers and surface waters during; progress of the construction; the re- moval, after completion of the work, of all sheeting, shoring, and bracing not necessary to support the sides of the excavation; the satisfactory dis- posal of excess and unsuitable materials not required or which cannot be used for backfilling, tamping, compacting, and refilling after settlement of all excavated areas; the restoring of all streets, alleys, fences, rights- of-way, and other land or structures, private or public, damaged or occupied by the contractor in the performance of the work, to as good a condition as they were prior to the beginning of the work. In general, the lines will be laid in the parkway, or, with permission of the Engineer, may be laid in easements. Wherever lines are to be installed on private property, the Developcx will secure the necessary easements in the name of the Town of Westlake. The Contractor must use due care to protect the property over which the project extends. Where the lines are to be conbtructed across or in streets that have been dedicated and not yet opened, the Contractor shall clear the right-of-way to a width necessary for the -trenching and pipe laying operations. All trees, brush, stumps, and other debris removed in this process shall be disposed of by the Contractor. Burning will be allowed only where it can be performed without harm to the adjacent property or timber, and only in certain places which have the Engineer's, property owner's and fire Depart- ment's approval. Where necessary, the Contractor shall level the ditchline before trenching operations with a bull -dozer, maintainer, or by other means, so that the tracks of the ditching machine are level with each other, and the ditch is cut with vertical sides. Where it is not practical to level the right-of- way, the Contractor shall block up the tracks on the low side of the ditching machine with timbers or otherwise to keep the bucket -line and the side of the trench vertical. - 1 - The Contractor shall take down fences on or crossing the right-of-way for such periods of time only as necessary for clearing and leveling the right- of-way. He shall construct temporary gates in all such fences to permit his operations, and shall be strictly responsible for keeping such tempo- rary gates closed at all times. The Contractor shall be responsible for any stock lost through any tempo- rary gate in any fence. After the construction work is completed, the Contractor shall repair all fences he has taken down or made temporary gates in, so that they are in as goad or better condition than they were before being disturbed. The Contractor shall make his own arrangements with each property owner for the right of entry across the property, if he desires entry other than along the easement. If he fails to make such arrangements, he shall limit his entry to along the easement, and shall maintain the easement right-of- way in such condition that the entire length of line can be traversed in a 4 -wheel drive vehicle until final inspection. B. Construction Methods: Trenches shall be excavated by a trenching ma- chine where possible, but may be excavated by other machines or by hand where conditions will not permit a trenching machine to work. The banks of the trenches shall be as vertical as possible. Trenches will be excavated to the lines and grades or as shown on the plans as submitted to and approved by the City Engineer. The width of the trench shall be six (6) inches minimum and eight (8) inches maximum.on each side of the pipe bell. The excavation shall not advance more than three hundred (300) feet ahead of the completed backfilled line. Pape shall be laid in all trench that has been opened at the end of each day', work, unless the contractor secures written permission to do otherwise from the Engineer. If the bottom of the trench becomes an unstable foundation for the pipe through the neglect of the contractor to adequately shore or de -water and trench, the Contractor will be required to remove the unstable material and backfill the trench to the propex grade with approved compacted gravel. Also, if the trench is inadvertently excavated deeper than necessary, it shall be backfilled to the proper grade with approved compacted gravel. If the undisturbed material enccurtered at the grade depth constitutes, in the opinion of the Enginear, as unstable foundation for the pipe, the Con- tractor will be required to remcv e such unstable material and backfill the trench to the proper grade with approved compacted gravel. The Contractor shall remove any water which collects in the trenches while sewer pipes are being laid. In no case shall water be allowed to run over the invert or foundation or through the sewer without permission from the Engineer. Slater encountered shall be disposed of by the Contractor in a mariner satisfactory to the Engineer. --2- The bottoms of the trenches for all sewers shall be carefully and truly graded, formed, and lined according to the grades and dimensions furnished the Contractor. They shall be approved by the Engineer before any sewer pipe is laid therein. Bell holes shall be excavated by hand. It shall be the responsibility of the Contractor to locate, with a pipe de- tector or otherwise, all existing utilities and to save same from all harm. In the event the contractor damages an existing utility line during con- struction such damage shall be repaired immediately in a permanent manner satisfactory to the Engineer. The Contractor shall excavate all trenches, including work necessary in working around existing -pipe lines or other obstructions. The Contractor shall give notice to the owners of any such lines or obstructions:in order that they may have time to take the necessary precautions for protecting their property. The Contractor shall be responsible for protecting the owner from any damage from.his operations in such work. In rock, excavation shall be carried six (6) inches below the bottom of the pipe, and loose earth or gravel, thoroughly tamped, shall be used for back- filling to grade. C. Sheeting: In wet, staurated, or flowing materials, when it is necessary to install tight sheeting or cofferdams, wood or steel sheet piling of a de- sign and type approved by the Engineer shall be used. All sheet piling, shor- ing, and bracing shall have sufficient strength and rigidity to withstand the pressure exerted and maintain the sides of the excavation properly in place a:.a protect all persons or property from injury or damage. When excavations are made adjacent to existing building or other structures or in paved streets, particular care shall be taken to adequately sheet, shore and brace the sides of the excavation to prevent undermining of or settlement beneath the struc- tures or pavement. Underpinning or adjacent structures or pavement shall be done by the Contractor in a manner satisfactory to the Engineer and when re- quired by the Engineer. The pavement shall be removed, the void satisfactc- rily refilled and compacted, and the pavement replaced by the Contractor. Sheeting, shoring, and bracing shall not be left in place unless authorized by the Engineer. The removal of sheeting, shoring, and bracing shall be done in such manner as not to endanger or damage either new or existing structures, private or public properties, and so as to avoid cave-ins or sliding of the banks. All holes or voids left by the removal of the sheeting, shoring or bracing shall be immediately and completely filled and compacted with suitable materials. D. PumRing, Bailing and Draining: The Contractor shall immediately remove all surface or seepage water from sewers, drains, ditches, and other sources which may accumulate during the excavation and construction work by provid- ing the necessary underdrains or otherwise and by doing the necessary pump- ing, bailing or draining. The contractor shall have available at all times sufficient equipment in proper working order for doing the work herein re- quired. All water removed from excavations shall be disposed of in an ap- proved manner so as to not create unsanitary conditions nor to interfere un- duly with the use of streets, private driveways, or entrances. - 3 - E. Support of Existing Pipes Across Trench: It shall be the responsibility of the Contractor to protect and support all water, gas, and other conduits crossed by the excavation or work to be performed by him or to arrange for their temporary removal and subsequent replacement. F. Disposal of Excavated Materials: Excavated materials, so far as needed and of a suitable character, shall be piled adjacent to the work to be used for backfilling as required. Excavated materials unsuitable for the back- filling or in excess of that required for backfilling shall be disposed of in an approved manner at locations designated or approved by the Engineer. Desirable topsoil, sod, etc., shall be carefully piled separately and re- placed in its original position when required. Excavated materials shall be handled at all times in such a manner as to cause a minimum of inconvenience to public travel and to permit safe and convenient access to private and pub- lic property adjacent to or along the line of the work. G. Protection of Trees Plants Shrubbery, Etc.: Where trees, plants, shrubbery, etc., are -adjacent to the line of the work and are not to be re- moved or removed and replaced, the Contractor may be required to protect such trees, plants, shrubbery, etc., by substantial wooden boxes and guards and shall not permit machinery or employees to scrape, tear the limbs from or damage or attach guy cables to them, and if, in the opinion of the Engineer, such trees, plants, shrubbery, etc., would be damaged by machinery, etc., hand excavation may be required. H. Use of Explosives: Should the Contractor elect to use explosives in the prosecution of the work they shall be used with utmost precaution, and no blasting shall be done within 50 feet of the completed work or exposed pipes, conduits, etc. He shall first obtain a blasting permit from the City and assume all liability :for any injury or damage to persons or property re- sulting from such usage. All necessary precautions shall be taken by the Contractor, and provisions shall be made for the protection of the new work; all blasting shall be so conducted as not to endanger persons or property. Only a sufficient quantity of explosives for the immediate day's work shall be kept at the site of the work by the Contractor. Caps, detonators and explosives shall be stored separately. The Contractor shall be responsible for and shall make good any dat�age caused by blasting or accidental explo- sions. I. Tunneling and Casing: Tunneling under highways, streets or railroads shall be accomplished by means of jacking and tunneling equipment which has been approved by the Engineer prior to starting tunneling operations. Tun- nels shall be backfilled as completely as practicable with selected materials and compacted by mean, of mechanical tampers. The remainder of the tunnel backfill shall be of coarse sand, gravel or crushed rock hydraulically placed in such manner that no voids remain between the backfilled materials and the roof of the tunnel. J. Encasement Carrier Pipe: When encasement carrier pipe is required corru- gated metal pipe or reinforced concrete may be used. All corrugated metal pipe shall conform to the standard specifications of A.A.S.H.O. Standard Specifications for Highway Materials Designation M-36, latest revision for base metal and fabrication where applicable. The pipe shall be formed from 14 gage sheets which shall be galvanized. All reinforced concrete pipe shall be designed as prescribed in the current standard specifications for "Reinforced Concrete Culverts, Storm Brain and Sewer Pipe", A.S.T.M. Designation, C -76-57T. K. Crossings to be Ke t d en: At such street, railroad and all other crossings as may be designated by the Engineer, the trenches are to be filled in such a manner as to prevent any serious interruption of traffic upon the roadway or sidewalks. The cost thereof shall be borne by the Contractor. L. Protection of Unfinished Work: Before leaving work for the night, dur- ing a storm , or at other times, care must be taken to protect and securely close the unfinished end of the pipe. Any earth or other materials that may find entrance into the pipe through any such open or unplugged end of the pipe must be removed. M. Lights and Guards: The Contractor must provide and maintain adequate detours around the work under construction; the Contractor must provide sufficient lights, warning signs and watchmen to provide adequately for the safety of the public. N Backfill: Backfilling shall be done with good sound earth. Broken cor_-- erete, rock, bituminous pavement or other lumpy material shall not be used in the backfill except as the lumps are small and their dispersal in the backfill is made in the upper section in a manner satisfactory to the Engi.-- neer. Materials of a perishable, spongy, or otherwise improper nature shall. not be used in backfilling. Where good sound earth is not available from the excavated material, concrete backfill material will be used for the initial backfill operation to a point twelve (12) inches above the top-oi' the pipe. Concrete backfill material will not be required when concrete encasement is specified or used around the pipe. No backfill shall be until it is authorized by the Engineer and shall be done immediately when so ordered by the Engineer. All debris shall be removed. Sheeting, shoring and bracing shall be pulled and removed during the progress of the backfill- ing in a manner satisfactory to the Engineer. if, on account of special condition, backfill compaction by flushing, flood- ing or ponding and jetting with water may float or otherwise damage the structure, this method shall be used only upon the written permission and authority of the Engineer and shall be performed according to and under his personal supervision. Backfilling shall be brought up to an elevation slightly above the original ground level to allow for subsequent settlement. Concrete cushion and backfill shall be composed of a free flowing material. consisting of small stone, pea gravel, limestone chat, or pit'. run sand and gravel.and shall always consist of at least 60% sand. The material shall all pass a 3/4" screen and be free from sticks, lumps, stones, and organic matter. The material shall be mixed with Portland Cement in the proportions of 1 part cement to 12 parts of the above described granular material, by volume measurement. Concrete cushion or concrete backfill shall be poured either wet or dry as may be directed by the Engineer. - 5 - When concrete cushion or concrete backfill material is specified or ordered by the Engineer to be poured DRY, the Contractor shall place this material on each side of the pipe for the full width of the trench using shovels to cut the material back under the pipe and shall be tamped to a height of 12" above the pipe to receive final backfill. Care must be exercised not to dislocate or disturb the grade of alignment of the pipe. If ordered by the Engineer to be poured IvTT, caution and care must be used not to float the pipe out of glace. In the event pipes are floated out of proper position they shall be removed and relaid. When, in the opinion of the Engineer, the subgrade material encountered at grade is soft, spongy and unsuitable, it shall be removed to such a depth that the replacement thereof with firmly tamped gravel or crushed stone will provide an unyielding, stable foundation. The gravel used in cushion or backfill shall be pit run gravel or crushed stone and shall be free from silt, loam or vegetable matter and shall be of a gradation suitable to the Engineer. After pipe has been laid to such an extent that it will not be damaged by the backfilling operation, good sound earth from the spoil bank shall be brought up by hand or mechanical tamped layers not exceeding eight (8) inches in thickness of loose fill approximately equal on each side of the pipe to a height of twelve (12) inches over the top of the pipe. The first layer cannot extend above the spring line of the pipe. The tamping shall be carefully and thoroughly done in such a manner so as not to displace the pipe from its original position. When necessary in the opinion of the Engi- neer, the backfill materials shall be moistened to facilitate compaction by tamping. Tamping may be performed by either hand or mechanical means. However, whe.1 in the opinion of the Engineer, the initial backfill is not getting proper compaction by hand tamping methods, he may order the Contractor to use.me- chanical tamping entirely. The final backfilling operation shall be one of the following: 1. The remainder of the backfill material may be placed in uniformly compacted layers not exceeding one (1) foot in loose depth and hand or mechanically tamped in a manner approved by the Engineer. 2. The backfill material may be placed loosely in the trench, rounded up over the trench slightly above the original ground elevation with- out tamping, and the trench ,jetted with water until all settlement has ceased; the jets to be placed not over six (b) feet apart on alternate sides of the trench. Care must be taken not to disturb the pipe by this jetting operation. 3. The backfill material may be deposited in water in ponds. Ponds not exceeding three (3) feet in depth shall be created in the trench by means of earth cross dams and the backfill material shall be cast into the ponds in a manner satisfactory to the Engineer. This method will be continued until -the backfill is brought to within one and one-half (lz) feet of the surface of the original ground. The remainder of the fill will be made with loose earth rounded up over the trench in a neat manner and left in a condition acceptable to the Engineer. 4. Where utility lines lie within the limits of a proposed street the backfill shall be a selected granular material and placed on both sides of the line equally in uniform layers not to exceed 2 feet in depth (loose measurement), wetted and thoroughly compacted across the proposed street and three feet past the street limits. This granular material is to be brought to within 12 inches of finished subgrade. S. Where any asphalt or concrete street has been cut, the following pro- cedure is to be used in backfilling and replacing the pavement: Concrete backfill material will be tamped or poured into placed over the pipe as necessary to bring the Concrete back- fill material within seven and one-half (71) inches of the finished surface. After the concrete backfill material has been brought within seven and one-half (1) inches of the finished surface the material on either side of the trench shall be removed for a horizontal distance of twelve (12) inches and a depth of seven and one-half (72) inches. This will provide a shoulder of undisturbed bearing along each side of the trench twelve (12) inches wide. Six (6) inches of 2500 pound concrete is then to be placed on top of this shoulder and the concrete backfill material. As soon as the 2500 pound concrete has obtained its set, the asphalt or concrete shall be neatly cut with a concrete saw to true lines, the surface will be tack coated with RC -2 cut back asphalt and surfaced with one and one-half (12) inches of hot mix asphaltic concrete. Prior to completion and final acceptance of the entire job, the Contractor will be required to refill and recrown all trenches which have sunk below ground level or where the crown is reduced to indicate that such subsidence will occur. 0. Protection of Existing Curb and Gutter: If the Contractor places water services or sewer services under curb and gutter that is already in place, he shall insure that no damage is done to the curb and gutter. Water ser- vices shall be placed under existing curb and gutter by driving a steel rod under the curb and gutter to bore a small hole and then pushing the service pipe through the hole. When placing water or sewer services after the curb and gutter is in place, the Contractor shall not excavate an open ditch closer than six (6) inches to the curb and gutter section either from the front or back. If sewer services are to be placed under the curb and gutter after it is already in place, the sewer services shall be placed in a hole -bored under the- -curb and gutter section. Before any water-ervices are placed under the curb -and gutter section, the -City's inspector_,.,shall inspect the curb and gutter and mark all broken places. After the water and sewer. services are in place then the curb and gutter shall be inspected again and all broken curb and gutter marked. All curb and gutter, broken by the.Contractor`shall be replaced. - 7 - P. Unloading of Pi e: All water and sewer pipe to be used in Hurst shall be unloaded y hand or mechanical means. Pipe rolled or dropped from the truck shall be immediately rejected for any type of use in the City's sys- tem. II. WATER PIPE AND APPURTENANCES. A. General: The material and labor required under this item shall consti- tute the construction of the water distribution system, or extensions to the existing system, as shown on the plans. Included are mains, laterals, valves, valve boxes and appurtenances. Where the work is across maintained lawn, the Contractor shall save, protect, care for, and replace the lawn grass. In making connections to existing mains or the removal of existing water lines, the Contractor shall make every effort to remove pipe, valves, valve boxes, fittings, etc., without damage to the same and unless required for reinstallation shall clean and deliver same to the material yard of the City. All salvaged material remains the property of the City, and such material which is destroyed or damaged in its removal by the Contractor due to his negligence shall be replaced by the Contractor with new material of equal or better quality. The Contractor shall not operate any valves or fire hydrants in the existing Town of Westlake Water Works System without the express permission of the Superin- tendent of the Water Department or his authorized inspectors. The required operation of valves and hydrants will be done only when an authorized repre- sentative of the Town of Westlake Water Department is present., C. Cast Iron Pie and Fittin s: 1. DesiE pressure and loads: Cast iron pipe shall be designed to with= stand internal working pressures of one hundred fifty pounds be permadsquare inch water pressure. For external loads, provision or truck loads on streets and roads as specified in the American Standards Association Manual A21.1, with the wall thickness of the pipe being adequate for the depth of bury of the various sections of the pipe as shown on the plans. All pipe and fittings shall be listed as approved by the Underwriter's Laboratories, Inc., and sh2L7.l be pipe approved by the Fire Insurance Division of the State Board of Insurance Commissioners. The Cast iron pipe may be Tyton, Bell -rite, or other approved type of rubber-gasketed pipe. 2, Pipe: Cast iron pipe shall comply in all respects with Federal Speci- fications WW -P -421a, Types I, II, or III, except for wall thickness and weight of barrels as described in the following paragraph: Centrifugal cast pipe shall be designed in accordance with the Manual for the Computation of Strength and Thickness of Cast iron Pipe (A21.1- 1999) as approved by American Standards Association. Centrifugal cast pipe shall have a metal thickness based on a tensile strength of 18,000 - 8- pounds per square inch and modulus of rupture of 40,004 pounds per square inch, and shall be designed for a 5 -foot cover, except for sec- tions where the plans show greater cover, in which case the pipe for these sections shall be designed for the actual cover. For any varia- tion from the above physical strength values, there shall be a corres- ponding variation in metal thickness based on the formula in Manual. for Computation of Strength and Thickness of Cast Iron Pipe (A21.1-1939) as approved by the American Standards Association. Pit case pipe shall be designed for a minimum working pressure desig- nated as Class 150 and shall conform, including wall thickness and weight, with Federal Specification WW -P -421a. 3. Coating and _lining: All cast iron pipe and fittings shall have an inside cement mortar lining conforming with American Standards Associ- ation Specification for cement lining for cast iron pipe and fittings (A21.4-1953), or conforming with manufacturer's standard specification for seal -coated "Enamel.ine" lining or approved equal. it is intended that "Enameline" lining or approved equal shall conform with ASA 21.4 except for the thickness of the lining which shall be one-half thick- ness as specified in ASA 21.4.. outside coating shall conform with American Standards Association Proposed Specification for Coal Tar -Dip coating for Cast Iron Pipe and Fittings (A21.5-1950). 4. Cast Iron Pi e Fittin s: Fittings for cast iron pipe shall be cast iron, and suitable for 150 pounds per square inch working pressure. The metal thicknesses shall conform to the thicknesses specified by the American Water Works Association for class "D".fittings, but the laying lengths may be the same as for short bodied fittings. The fit- tings shall be cement lined on the inside and coal tar dip coated on the outside as specified for the cast iron pipe. D. Reinforced Concrete [dater Pipe --Steel Cylinder Type Modified Preten- sioned : Concrete cylinder pipe, modified prestressed or pretensioned reinforcement) shall consist of a welded sheet steel cylinder lined with a dense concrete lining and around which there is placed reinforcing bars wound helically under measured tension, with a dense concrete coating covering the cylinder and the bars, and with steel joint rings of the bell and spit type for rubber gasket. Pipe shall be in approximately thirty- two (32r foot nominal lengths except for shorter lengths as required by special conditions. The pipe and fittings shall comply with the Federal Specifications SS -P-381 entitled "Pipe, Pressure, Reinforced Concrete, Pretensioned Reinforcement (Steel Cylinder Type)' with such modifications as set forth herein. The pipe manufacturer shall have had a successful experience record in the design and manufacture of concrete cylinder pipe and shall have had a sub- stantial footage of pipe or similar size and with the same joint as offered for this project in successful operation for at least five (5) years. All pipe, fittings, outlets, etc., shall meet the requirements of the Underwriters' Laboratories, Inc., and shall be acceptable to the National Board of Fire Underwriters. All pipe shall be Class 150 designed for a working pressure of 150 pounds per square inch. - 9 - The Contractor shall furnish the Engineer with shop drawings showing the pipe and fittings to be furnished and shall include a location-profile and a tabulated layout schedule if required by the City Engineer. Such drawings shall be subject to the approval of the City Engineer,'and fabrication of pipe and fittings shall not be commenced until such drawings have been ap- proved by the Engineer. E. Gate Valves and Installation: Gate valve6 shall be cast iron body, double disc, parallel seat, brass or bronze Mounted throughout, and shall have brass or bronze stems. Pio bronie body valves whatsoever will be per- mitted. Valves shall have a nonrising stem,and shall open by turning counter-clockwise. All valves shall be equipped with a two (2) inch square wrench nut for operations unless otherwise specified. Valves shall be designed for a minimum working pressure of one hundred fifty (150) pounds per square inch and shall comply in all respects with the latest appli.; cable A.W.W.A. specifications. Valves (Also tapping sleeves and valves) shall be Mueller or equal quality. All valves shall be installed as in- dicated on the plans. For each gate valve, the Contractor shall furnish and install a valve box. Valve boxes shall be three piece screw type cast iron of the extension type and shall be similar to Mueller No. H-10360 or an approved equal. The three pieces shall consist of the top section, bottom section and cover. Extensions shall be provided as.required. Valves shall be carefully han- dled and lowered into position in such a manner as to prevent damage to any parts of the valve. Valves shall be placed in such positions as in- dicated on the plans with the stem in a vertical position and securely held until all connections have been made. All connections to existing lines that are 18 -inch and smaller shall be made by installing a tapping sleeve on the existing line, installing a tapping valve on the tapping sleeve, and tapping the line with a machine made for the purpose. Inter- ruption of water service will not be allowed unless approved by the Engineer. The tapping sleeve shall be rated at 150 psi working pressure or greater and shall be Mueller No. H-615 or approved equal. The valves to be attached to the tapping sleeve shall meet AWWA Specifications, and in addition, shah_ be equipped with the necessary flange connections for attaching the valve to the tapping sleeve and for attaching a Mueller Pio. C -C, No. C-1 or ap- proved equal, tapping machine to the valve. They shall be Mueller Pio. H-658 mechanical joint valves or approved equal. F. Fire Hydrants: All fire hydrants shall be standard 3 -way fire hydrants, Mueller A-24015 or equal, with mechanical joint inlet, as approved by the Fire Insurance Division of the State insurance Commission, and shall conform strictly to American Water Works Association standard specification for-f_i.re hydrants for ordinary water -works service, AWWA 0502-63, except for changes or additions specifically outlined as follows: 1. All hydrants shall have not less than a 5411 valve opening, and shall have a 611. mechanical joint inlet. 2. The body of the hydrants between the in two parts connected by a flange to any desired direction. -10 - elbow and the top shall be made permit facing of the nozzles it 3. Hydrants shall be so designed that all working parts along with the main valve and waste valve, may be removed for inspection and/or re- pair without excavating or disturbing the ground. 4. Hydrants shall be provided with an automatic and positive operating noncorrodible drain valve so as to drain the hydrant completely when the main valve is shut. Outlets for drainage of the barrel shall be made of bronze or noncorrodible material, or bushed therewith, com- pletely from the valve to the outside. S. The operating nut shall be standard five -sided nut, and all threads and sizes shall be National Standard. 6. Operating stems whose threads are located in the barrel of waterway shall be of manganese, Everdur, or other high quality noncorrodible metal., and all working parts in the waterway shall be bronze to bronze. 7. Operating stems whose threads are not located in the barrel or water- way, must be sealed against contact with the water at all times regard- less of open or closed position of the main valve. 8. Each hydrant shall have a gate valve installed between it and the main; such gate valve shall have flanged and mechanical joint ends. Mueller #A2380-16 or approved equal. 9. The length of the barrel of the fire hydrant shall be sufficient for the depth of bury at the particular location in which the hydrant is to be installed, and so that the pumper nozzle is at least 18 -inches above the finished curb adjacent to the hydrant. In general, the hyd- rant barrels should be of the proper length for 3� foot bury, but longer barrel hydrants shall be installed where the mainline is more than 3 feet deep. 10. The interior of the barrel and the exterior of the barrel below the ground line shall be coated with a coal tar dip enamel as specified for the cast iron pipe. The exterior of the hydrant above ground shall be primed with a suitable rust inhibiting metal primer. The Contractor shall paint the fire hydrants above the ground line after installation with two coats of bright red machinery enamel, Pittsburgh or approved equal. G. Inspection; During the process of unloading, all pipe and accessories shall be inspected by the Contractor for loss or damage in transit. No shipment shall be accepted by the Contractor until notation of any lost or damaged material. shall have been placed on the bill of lading by the agent of the carrier. All pipe and accessories shall be laid, jointed and tested for defects and for leakage with pressure, and chlorinated in the manner herein specified in the presence of the Engineer or his authorized inspec- tor and subject.to their approval. All material found during the progress of the work to have cracks, flaws or other defects will be rejected by the Engineer, and the Contractor shall promptly remove from the site of the work such defective material. -14- The Contractor shall be responsible for all material furnished to him or by him and shall replace all such material that is found to be defective in manufacturing or that has become damaged in handling after delivery by the manufacturer. The Contractor shall be responsible for the safe storage of material furnished by or to him until it has been incorporated into the completed project. Pipe fittings, valves and other accessories shall be unloaded at the point of delivery, hauled to and distributed at the site of the project by the Contractor. They shall, at all times, be handled with care to avoid dam- age. In loading and unloading, they shall be lifted by hoist, slid or rolled on skidways in such a manner as to avoid shock. Under no circum- stances shall they be dropped. Pipe handled on skidways must not be skidded or rolled against pipe already on the ground. In distributing the material at the site of the work, each piece shall be unloaded opposite or near the place where it is to be laid in the trench. Pipe shall be handled in such a manner that a minimum amount of damage to the coating will result. Damaged coating shall be replaced in a manner satisfactory to the Engineer. Pipe shall be placed on the site of the work and parallel with the trench alignment and with bell ends facing the direction on which the work will proceed unless otherwise directed. The interior of all pipe, fittings, and other accessories shall be kept free from dirt and foreign matter at all times. H. Pipe Handling: Proper implements, tools and facilities shall be pro- vide and used by the Contractor for the safe and convenient prosecution of the work. All pipe, fittings and valves shall be carefully lowered into the trench piece by piece by means of derrick ropes or other suitable tools or equipment in such manner as to prevent damage to pipe or pipe coating. Under no circumstances shall pipe or accessories be dropped into the trench. At all times when pipe laying is not in progress, the open ends of the pipe shall be closed by approved means, No trench water shall be permitted to enter the pipe. All foreign matter or dirt shall be removed from the pipe, and it shall be kept clean by approved means during and after laying. No pipe shall be laid in water or when trench conditions are unsuitable for such work. Cutting of pipe for inserting valves, fittings or closure pieces shall be -done in a neat worlmanlike manner without damage to the pipe, Concrete pressure pipe shall not be cut on the job without the approval of the Engineer. I. Cast Iron Pipe Layin& and Jointing: The interior of the pipe shall be cleaned of all dirt, trash, leaves, and other debris before the pipe is laid. The pipe shall be lowered into the trench with ropes or machinery in such a manner that the pipe will not be damaged. Before the pipe is placed in the trench, the ends of the pipe and couplings, spigots and bells shall -be --thoroughly cleaned. The pipe shall be thoroughly inspected for cracks or any other damage febore it is installed. The method of making joints for all cast iron pipe shall be recommended by the manufacturer. -12 - The Contractor shall be responsible for the measurement of all connections. Flanged piping shall be erected in accordance with the controlling dimen- sions shown on the plans. Each piece of flanged pipe shall be thoroughly cleaned to remove dirt, rust, grease and other foreign matter. Flanged faces shall be thoroughly wire brushed to insure even bearing for gaskets and mating flanges. Gaskets fok flanged joints shall be composition sheet - packing, fall -facet, 1/16 -inch thickness, "Granite"§ or approved equal. Flange bolts shall be installed with bolts in one direction. Flange bolts shall be tightened, each in turn, at a uniform rate around the joint. J. Concrete Cylinder Pipe Laging and Jointing: Concrete cylinder pipe, fittings, specials and valves are to be installed at locations shown on the plans. Unless otherwise indicated, pipe in trenches shall be laid to the grade shown on an even grade from point to point for which elevations are fur- nished. Pipe, fittings, valves and other accessories shall be hauled to and dis- tributed at the site of the project by the Contractor; they shall at all times be handled with care to avoid damage. In loading and unloading, they shall be lifted by hoists or cranes as specified below or rolled on skidways in such manner as to avoid shock. Under no circumstances shall pipe be dropped. Pipe handled on skidways must not be skidded or rolled against pipe already on the ground. Pipe shall be placed on the site of the work parallel with the trench alignment and with bell ends facing the direction which the work will proceed unless otherwise directed. Proper implements, tools, equipment and facilities shall be provided and used by the Contractor for the safe and convenient prosecution of the work.. All pipe, fittings, specials, valves, etc., shall be lowered into the trench by means of a "Side Boom", crane or other suitable machine and shall not be rolled or dumped into the trench. The "Side Boom" crane, etc., shall be of a sufficient size for handling the pipe, shall lift and lower the pipe at a slow rate of speed, and shall be capable of stopping the lifting operation at any point without producing a shock or otherwise jerking or vibrating the pipe. The hoisting cable pipe clamp shall be connected to the pipe in - -� such a manner so as to prevent damage to the coating. The method of connec- tion shall be subject to the Engineer's approval. Before lowering into the trench, each joint of pipe shall be inspected and any unsound or damaged pipe shall be rejected. The pipe shall be kept clean during the laying operation and free of all sticks, dirt, and trash, and at the close of each operating day, the open end of the pipe shall be effectively sealed against the entrance of all objects and especially water. No pipe shall be laid in water or when the trench conditions of the weather are unsuitable for such work, except in an emergency and then only upon permission of the Engineer. All pipe shall be laid accurately to established lines and grades with valves and fittings at the required location and with joints centered with spigots home.. Where it becomes necessary to make deflections in the line of the pipe, sections of pipe with beveled ends or fabricated fittings shall be used. -13 - Minor deflection of the line of the pipe may be obtained in the pipe joints; however, the maximum.joint opening caused by such deflections shall not exceed 3/4 -inch for 16 -inch pipe and larger. Sections of pipe shall be tightly fitted together, and care shall be exercised to secure true alignment and grade. Before laying each joint of pipe, the bell and spigot rings shall be tho- roughly cleaned by wire brushing and wiping until clean and dry. Where pipe is being laid the gasket shall be placed on the spigot ring, and the spigot end of the pipe shall then be entered into the bell of the adjoining pipe and forced into position. The ,gasket and the inside sur- face of the bell shall be lubricated with a suitable solution (flax soap) which will facilitate the telescoping of the joint, The inside joint recess between ends of the pipe sections shall have a maximum and minimum width of one (1) inch and one quarter (a) inch respectively. No "Blocking Up" or pipe or joints will be permitted. The exterior joint shall be made by placing a cloth joint wrapper around the pipe which will be held in place with two strands of wire. The cloth wrapper shall be seven (7) inches wide and hemmed on each side so that the wire "Ties" may be inserted to hold the wrapper in place. The cloth shall be of such length that it will encircle the pip6, leaving enough opening between the ends to.allow the mortar to be poured inside the wrap= per. The wire ties shall be 16 gauge black annealed wire, or approved equal, and shall be of such length as to encircle the pipe and overlap at the ends about eight (8) inches for tying. The wrapper shall be se- curely fastened before the joint is poured. The wire wrapper shall be similar and equal to the wrappers (Diapers) as made by the Mar -Mac Manu- facturing Company. The grout used for pouring the joint shall consist of one part Portland Cement (Type 1) to two parts of clean, fine, sharp plaster sand and mixed to the consistency of thick cream. The joint shall be filled with this grout from one side in one continuous operation until the grout has flowed entirely around the pipe. During the filling of the joint it shall be rodded with flexible wire to settle the grout. Upon completion of backfilling of the pipe trench the inside joint recess shall be filled with a Portland Cement mortar consisting of one part ce- ment to two parts sand. Careful inspection shall be made of each joint to insure a smooth con- tinuous interior surface. The interior of the pipe shall be thoroughly cleaned and any obstructions that may reduce its carrying capacity re- moved. Whenever necessary to patch anY inside surface cuts on the inside surface of the pipe and where necessary to patch any chipped areas at the ends of the pipe, such patches shall be made with a mortar of one part Embeco (As manufactured by the Master -Builders Company), one part Portland Cement, and one part clean, sharp sand, all measurements to be by weight* Pipe thus patched shall not be installed until the patch has been properly and adequately cured and unless approved for laying by the pipe manufacturer's inspector and by the Engineer. - 14 - K. Cover Over Pipe and Clearance from Other Pipes: It is intended that all water lines shall have a minimum cover of forty-two (42) inches un- less otherwise specified or directed by the Engineer. Where the lines are located in improved streets with curb and gutter, the dover of 42 inches will be measured from the top of the curb to the top of the water pipe. Where the water lines are located in unimproved streets without curb and gutter, the cover of 42 inches will be measured from the bottom of the road ditch to the top'of the pipe regardless of the cover over the pipe at other points in the street. Across natural ground, the cover over the pipe shall be measured from natural ground to the top of the pipe. If a profile is shown on the plans, the Contractor will be required to lay the line to conform to the grades shown. If it is necessary that a water line shall have over 42 inches of cover in order not to exceed the manu- facturer s recommendations for deflection of the pipe, the Contractor shall excavate the ditch to the required grade. Regardless of the depth of ditch necessary, the Contractor shall, under no condition, exceed the manufacturer's recommendation for deflection of the pipe at joints. Attention is called to the fact that concrete cylinder pipe must be laid on a grade to insure proper jointing of the pipe. The grades will be determined in such a manner so as to avoid excessive use of fittings and specials and to provide a uniform grade between low points and high points. Water pipes shall be laid, so far as possible, six (6) feet above the ele- vation le-vation of nearby sewers at crossover points and at least ten (10) feet laterally from sanitary sewers. Where this requirement for vertical clearance cannot be met because of physical condition,•the water mains shall be placed so that no water pipe joints will exist within tan (10) feet of the crossover point. L. Service Connections: Slater service connections shall be made by tapping the mains at specific points as designated by the Engineer. Ser- vice taps shall be made after the mains have been laid and tested and while the main is under pressure. The work shall be done by experienced workmen with suitable tapping machine and tools. The copper service pipe shall be connected to the corporation cock at the main and laid in the trench from one side to the other every ten (10) feet to give ample space for expansion and contraction of the pipe. The copper service shall have a cover of twenty-four (24) inches, except where the service pipe shall pass under the curb. At this point the service pipe shall be a minimum of 18 -inches under the bottom of the curb and gutter section. Excessive bending of the pipe which will injure or reduce the cross sectional area of the pipe will not be permitted. The length of the service line shall extend from -the main to a point three (3) feet back of the street curbs. The curb shall be stamped with the letter "W" in good quality at the point where the service pipe passes under the curb. If the curb is not in place or will not be put in for at least sixty (60) days, a 2" x 4" stake painted green and white shall be placed over the end of the service line. This stake shall be driven into good firm earth at least twelve (12) inches and shall extend at least eighteen (18) inches above the surface of the ground. All marking, either on the stake or on the curb, shall be clear and legible and shall be done as soon as the services are in place. if the curb is placed over the service lines with- - lb - in sixty (60) days after the last service has been laid, the contractor shall mark the curb after the curb has been poured, The end of the ser- vice line shall be bent up toward the surface of the ground and a quarter bend coupling and a curb stop and a meter yoke affixed to it. The service pipe shall normally be 3/4 inch Type "K'= copper pipe, and shall conform to A. S. T. M. Class "A" Specification and U. S. Government Specifications WW -T-799 as well as A.. W; W4 A, 9ppcification 7S -CR. Corporation cocks shall be Mueller No. H-15000 with straight coupling nut or approved equal, or angle valves ---Mueller or equal. Quarter bend coup- lings shall be Mueller H-15530 or equivalent. Curb stops shall be Mueller H-10203 or equival.enti Meter yokes shall be Mueller H-14033 (5/8" x 3/411 x 7'F ) or equal. M. Connection to Existing Water Mains. Where indicated on the plans and approved by the Engineer, the Contractor shall connect the new main with existing mains or lines. The Contractor shall furnish all labor, material equipment and services required for the locating and uncovering of the existing line, the malting of cuts in the existing line, the removal re- location and lowering of existing lines as required, dewatering of the trench, connecting of the existing line into the new main and any and all appurtenant work required for a complete connection. Relocated mains or lines shall be laid so that all valves so relocated or installed shall be set vertically.. Only such connections to existing mains as are necessary to load, test, and sterilize mains under construction with water from City mains will. - be permitted prior to the sterilization of new mains, All other connec- tions to existing mains from a new main being constructed shall be made only after the new main has been adequately and satisfactorily sterilized and the Engineer or his inspector has authorized the connections to be made. Contractors will be required to plug and block lines, crosses, tees or other fittings installed in the new main to permit testing and sterilization prior to the making of connections. Such plugs and block- ing shall be adequate to withstand a test pressure of 150 pounds per square inch. Where cut -ins are made immediately adjacent to valves which are under pressure, the Contractor shall tale all necessary precautions to brace such valves with temporary blocking and bracing which shall be of ample size and properly placed to prevent movement or blowing off of any pipe valves, or fittings due to water pressure on the main. Connections to existing water mains shall be made at the locations shoran, as specified and/or as directed by the Engineer. All such connections shall be made in a most expeditious and workmanlike manner to cause the least inconvenience to water customers and to traffic and shall be made at night unless otherwise approved by the Engineer. The detailed sched- ule of operations for making each connection shall be approved by the Engineer or his inspector before any work thereupon is commenced. N. Required Pressure Tests: A leakage.test at 100 pounds per square inch for a period of six hours is required for all lines. As far as -s practical, tests, shall be made on sections having a valve on each end. - 16 Before making the leakage test, the Contractor shall completely fill the line with water. The air in the line shall be bled off through fire hyd- rants and service connections at high points in the lines. In the event there are not sufficient outlets to permit removal of all air, the Con- tractor shall tap the line and install corporation cocks at all points where air can be trapped to allow removal of the air. After all air has been removed from the line, the Contractor shall apply water pressure to the line and inspect every joint for leakage. Any leak- age found shall be repaired. After all visible leaks have been repaired, the Contractor shall raise the water pressure to above 100 pounds per square inch with a test water pump, and maintain this pressure for a mini- mum of six hours. The Contractor shall provide means for measuring the quantity of water pumped during the test. During the test the Contrac- tor shall inspect all joints for leakage. If any leaks are found or if the quantity of water pumped into the line during the tests exceeds 50 gallons per inch of diameter per mile of line per 24 hours, the leaks shall be repaired and the line retested. The Contractor, may, at his option, in lieu of measuring the leakage dur- ing the 100 pound per square inch test for 6 hours, raise the water pres- sure to 150 pounds per square inch with a test water pump. If the pres- sure remains unchanged for ten minutes, the line will be accepted without further leakage tests. At intervals during the test, the entire route of the pipe line shall be inspected to locate any leaks or breaks. Any defective joints, cracked or defective pipe, fittings or valves discovered in consequence of this pressure test shall be removed and replaced with sound material in the manner provided, and the test shall be repeated until satisfactory re- sults are obtained. No pipe installation will be accepted until the leakage is less than the number of gallons per hour as determined by the following formula: L= N D I P 1,850 Where "L" equals the allowable leakage in gallons per hour; "N" equals the number of joints in the length of pipe line tested; "D" equals the nominal diameter of the pipe in inches; and "?I equals the average test pressure in pounds per square inch. Based on this formula, the permissible leakage per 100 pipe joints per hour is as follows: PIPE SIZE PERMISSIBLE LEAFAGE PER 100 JOINTS IN GALLONS PER HOUR 6" 3.97 8" 5.30 10" 6.62 12" 7.94 14" 9.27 16" 10.59 - 17 - Should any test of pipe in place disclose leakage greater than that specified, the Contractor shall locate and repair the defective joints until such leakage is within the specified allowance. 0. Sterilization: After completion of each line, and before acceptance or use of each line, the water main shall be sterilized with chlorine solution to destroy any organisms present. This shall be done by intro- ducing chlorine solutions into the water in the line so that all parts of the line contains not less than 50 parts per million of chlorine. The chlorine may be introduced in the form of a solution of gaseous chlorine, or may be obtained from the use of chlorinated lime. The chlorine solution shall be introduced into the line with a pump after the line has been filled with water and thoroughly flushed out. Due precautions shall be taken to be sure that the entire line receives the chlorine solution. This can be done by opening an outlet at the end of the line, and allowing the water to flow out the end at a slow rate. Chlorine solution shall then be pumped into the line at the beginning of the new section, where the water is entering the section. The rate of chlorine application shall be at a measured rate in proportion to the rate of flow of the water through the pipe. As the chlorine solution flows through the pipe, the fire hydrants and various other outlets shall be opened until the chlorine solution comes out the outlet. When the chlorine solution reaches the far end of the pipe, all outlets are to be closed; and the chlorine solution pump stopped, and the line allowed to remain for a minimum of 12 hours. The Contractor shall provide taps in the top of the line with at least one every 1,000 feet of line. He shall equip these with corporation cocks and a short section of copper pipe. After the chlorine solution has remained in the line for a minimum of 12 hours, the Contractor shall take a sample of water from at least every 1,000 feet of pipe. He shall provide the materials and made a test of the chlorine residual with orthotolidine solution by the standard method. If every sample contains a residual of one part per million free chlorine, the line will be accepted as having been sterilized. If otherwise, the Contractor shall repeat the chlorination of the line and testing until all samples contain the free chlorine. The City reserves the right to use any portion of the line that has been completed, so the Contractor shall make the required pressure tests, sterilization, and bacteriological tests as soon as practical of each section of the line that the Owner desires to put into service, F. Bacteriological Test; When the entire pipe line or certain selected sections thereof have been completed, pressure tested, sterilized and made ready for turning over to the City ready for use, the line or section of line shall be tested according to the following procedure: The line shall be flushed out, completely replacing its entire volume with water from City mains. --18- A sample of water from the sterilized main shall be taken (not through a fire hydrant) from a suitable tap under the supervision of the Engineer or his inspector and submitted to the State Health Department for analysis. If the test shows a satisfactory quality of water, the line so sterilized may then be placed in service. if the sample shows unsatis- factory quality of water, the process of sterilization shall be repeated until satisfactory water is obtained. Q. Concrete Backing: Concrete having compressive strength of not less than -2500 pounds per square inch shall be used as a cradle or backing where shown on the plans or where directed by the Engineer. All materials including aggregates, cement and water, as well as the mixing and placing of the concrete, shall be approved by the Engineer. Bends of 222 degrees and greater plugs, and all tees, crosses, etc., shall be backed with con- crete as a thrust backing. Backing shall be placed between solid ground and the fitting to be anchored; the area of bearing on pipe and on ground in each instance shall be that required by the Engineer. The backing shall, unless otherwise directed, be placed so that the pipe and fitting joints will be accessible for repair. Concrete shall be composed of normal Portland Cement, coarse aggregate, fine aggregate, and water proportioned and mixed properly in a concrete mixer. Transit mix concrete will be allowed. Portland cement shall be Type I and shall be fully protected until incorporated in this work. Gravel to be used for coarse aggregate shall consist of clean, hard, dur- able grains, and shall be free from an excess of salt or alkali and foreign materials. Concrete shall have a compressive strength of not less than 2500 pounds per square inch at twenty-eight (28) days and shall have not less than four (4) sacks of cement nor more than six and three- quarters (6-3/4) gallons of water per cubic yard of concrete. R. Clean -Up; Touring construction, the Contractor shall maintain the premises in an orderly, neat and presentable manner. Scraps and debris shall not be left scattered, but shall be assembled together and such as are unusable shall be moved from the premises or disposed of to the satis- faction of the Engineer. When construction has been otherwise completed, the Contractor shall remove all left over construction materials, equip- ment, scraps, debris and rubbish. Earthwork shall be smoothed and graded to the lines shown on the plans. Backfill over all trenches shall be left in a uniform and neat condition. S. Final Inspection: Whenever the work has been satisfactorily com- pleted and the final inspection completed, the City Engineer will issue a letter of acceptance to the developer with a copy to the Contractor. III. SEWER PIPE AND STRUCTURES. A. General: These specifications are an attempt to standardize material specifications, method of installing sewer lines and appurtenances, and general methods of procedure. All sewer lines shall be constructed starting at the lowest point on the sewer line, and installing the pipe in the up -grade direction. Laying part of a sewer line and jumping to another section will not be permitted. -19 B. Materials: 1. Clay Pipe: All sewer pipe shall be compression joint vitrified clay sewer pipe and shall be extra strength salt glazed No. 1 pipe meet- ing ASTM Specification C -200-60T or ceramic glazed Class I pipe meet- ing ASTM Specifications C -278-60T, or as directed by the Engineer. 2. Cast Iron Pipe: Cast iron pipe shall be used where shown on the plans for stream crossings and for installation in bore holes under highways and railroads and where the sewer line is installed in a very shallow location for sewer lines 12 inches and smaller. The cast iron pipe shall be class 150 water pressure pipe. It shall be bell--and--spigot pipe with rubber gasket joint, or mechanical joint. Cast iron pipe shall have an inside cement mortar lining and have a coal tar enamel coating inside and out. 3. Joint Materials: a. The Contractor shall use pipe with premoulded plastic compound joints, or rubber-gasketed joints, such as Dickey's PVC or Tex- Vit's Delta -Seal. b. The joint materials for rubber gasket or mechanical joint cast iron pipe shall be as furnished by the pipe manufacturer with the pipe. 4. Manhole Materials: a. Brick: Manhole brick shall be sound and whole. No. two brick will be acceptable. b. Manhole bottoms: Manhole bottoms shall be constructed of 3000 PSI concrete. C. Rings and covers: Manhole rings and covers shall be smooth close grained cast iron, free of blisters, blow holes, and other imperfections. The ring and lid shall be machined so than the ring fits snugly in the lid. The ring and lid shall weigh at least 300 pounds. The lid shall have cast in it the words "Sanitary Sewer". d. Stepp: Manhole steps shall be substantial and shall be cast of smooth close grained cast iron, free of blisters, blow holes, and other imperfections. The manhole steps shall be designed to have sufficient anchorage in the brick wall. e. Mortar: Mortar for the manholes shall consist of three parts of Portland cement, six parts of mortar sand, and one part of hyd- rated lime. 5. Concrete: a. Piers: Concrete for piers for support of aerial pipe shall be ready -mixed concrete containing at least six sacks of cement per cubic yard of mix. - 20 - b. Cradle and encasement: If the Engineer or his inspector should order concrete for pipe cradle or encasement, the concrete shall have at least four sacks of cement per cubic yard of concrete. C. Pipe Bedding: The bottom of the trench shall be graded and prepared by hand so the pipe, when laid, will be on the proper grade. This may be accomplished in either of two methods. One method is to cut the trench to exact grade. This may be done by machine where the control of the depth of cut of the machine is sufficiently close so that the grade is exact. If the machine cannot cut to grade accurately enough, the machine excavation shall be slightly Less, and the final excavation made by hand. The bottom of the finished trench shall be exactly smooth and to grade, so that the barrel of each joint of pipe is uniformly supported along its entire length. If this method is used, bell holes shall be dug in the trench bottom of sufficient depth and width to allow the joints to be made properly. The other method allowable is to undercut the trench an amount equal to the depth necessary for the bell holes. If the trench is undercut either intentionally or accidentally, it shall be refilled to the proper grade with selected sand backfill material that is free from rocks or large clods, or with the backfill material thoroughly rammed into place and, if necessary, by using pneumatic tamps or a vibrating tamper of a type ap- proved by the Engineer. D. La in Pipe: Pipe shall be laid in the trench so that the interior surface of the bottom side of the pipe shall conform accurately to the flow line on profile. Pipes shall be laid accurately to the line and grade with the spigot end downstream, and entering the barrels to full depth. Any adjustment necessary to obtain the correct line and grade shall be accomplished by tamping in or removing of soil, and in no case, by wedging or blocking up. E. Manholes: Manholes shall be constructed at points shown on the plans or whereever ordered by the Engineer. Each manhole is to be completely built as the work progresses, and as each manhole is reached. They shall have the forms and dimensions as shown on the plans, and shall be finished in every respect in a workmanlike manner. Foundations for manholes shall be constructed of concrete as specified in the materials specifications. Flow channels shall be smoothly formed and of the same dimensions as the connecting pipes. The depth of the flow channel shall be not less than the outside diameter of the pipe. Where flow lines connect at angles, smooth, curved connections shall be formed, and wherever possible, half sewer pipe shall be used to form the channel. doors of manhole bottoms shall be sloped toward the channels with a fall of one-half inch per foot. Where pipes are laid through the manhole locations and the manhole installed later, the top half of the pipe shall be broken out or cut out. The walls shall be built of brick, plastered on the outside with one half inch of Portland cement mortar, and made watertight throughout. Rings for covers shall be installed, and securely mortared into place and covers placed in position. 21 - Cast iron steps shall be set staggered in the wall at intervals of six- teen inches vertically. Construction of manholes shall began immediately after the line has been laid through that point. The schedule of construction shall conform to the following: 1. Complete excavation and pour concrete bottom. 2. Build manhole walls completely. 3. Plaster manhole walls and construct invert inside the bottom of the manhole to above the outside diameter of the largest pipe, and set ring and cover. 4. Backfill trench to manhole, and begin compaction. 5. Complete backfilling and cleanup. Manholes shall be completely finished as the work proceeds. F. House Connections: At points designated by the Engineer, four inch outlet Wyes or Tees shall be laid with the branch, tilted up at an angle of thirty or forty-five degrees. This outlet shall be closed with a vitrified clay stopper, tightly set with asphaltic jointing compound. 1. Standard Sewer Service Connections: Standard sewer service connec- tions will consist of the service Wye and necessary one-eighth (1/8) bends, the necessary 2500 PST concrete cradle under the Wye and ex- tending to the bell of the one-eighth (1/8) bend, the four (4) inch sewer service pipe necessary to extend the line from the main to a point three (3) feet behind the curb, and the plug placed in the end of the service line. Standard sewer service connections will be made where the sewer main is less than six (6) feet deep and will be made as indicated on the plans or directed by the Engineer. 2. Extra Depth Sewer Connections: Extra depth sewer service connections will consist of the service Wye and 2500 PSI concrete cradle, the necessary bends and stacks with 2500 PSI concrete supports, the four (4) inch service line necessary to run the service from the main to a point three (3) feet behind the curb, and the plug placed in the end of the service line. The stacks shall be recessed into the wall of the ditch. Extra depth sewer service connections shall be placed at locations where the depth of the sewer main exceeds six (6) feet as called for on the plans or as directed by the Engineer. 3. Marking Location of All Sewer Services: The curb shall be marked with the letter "S" in good quality at the point wIjere the service line passes under the curb. If the curb is not in place or will not be put in for at least sixty (60) days, a 2" x 4i° stake painted red - 22 - and white shall be placed over the end of the service line. This stake shall be driven into good firm earth at least twelve (12) inches and shall extend at least eighteen (18) inches above the sur- face of the ground. All marking, either on the stake or on the curb shall be clear and legible and shall be done as soon as the services are in place. If the curb is placed over the service lines within sixty (60) days after the last service has been laid, the Contractor shall mark the curb after the curb has been poured. G. Clean Outs: Cleanouts will be located at points as indicated on the plans, a"� nd will be constructed in accordance with the plans. H. Inspection and Testing of Com feted Lines: 1. Infiltration Specifications: The pipe shall be laid in such a manner that the infiltration in the line does not exceed 500 gallons per inch of diameter of pipe per mile of line per 24 hours. Should. the Engineer require it, the Contractor shall furnish what- ever is required by the Engineer to estimate the volume of infil- tration. In general, where infiltration tests are to be made on various sections of the line, the Contractor will be required to. furnish a centrifugal ditch pump of sufficient capacity and a barrel. The amount of infiltration will be measured by timing the length of time required to fill the barrel by pumping all the infiltration in- to it. In the event the infiltration exceeds the maximum allowable, the Contractor shall replace or repair any section of the sewer line necessary to meet these specifications. 2. Flow Tests: Upon the completion of laying each sewer line, the Con- tractor shall thoroughly flush each sewer line with a sufficient quantity of fresh water at a sufficiently high velocity to clean each line. He shall continue his flushing until the water from each sewer line runs clear and clean. After this has been completed, the Contractor shall make a test of the cleanliness and flow through each line, by running a large quantity of clean fresh water through the lines. This may be ap- plied from a fire hydrant near the end of the line or may have to be hauled by water trucks. In any event, the flow through each line during this test shall be not less than 200 gallons per minute. For the purpose of the test, the Contractor shall furnish rubber balls which shall be run through each line in the presence of the Engineer or his inspector. The size of the rubber balls shall be as follows: 6" Lines 8" Lines 10" Lines & Larger Ball diameter 43-4_"-5" 653-771 8" or larger The ball shall be inserted at the high point of each line and flushed through the entire length of the line with inspection made of each manhole as the ball passes through it. Every sewer line on the project is designed so that the minimum velocity through the -- 23 - sewer lines exceeds 2 feet per second. During the ball test, the ball shall travel from manhole to manhole at not less than one-half this velocity or one foot per second. I. Final Inspection: On each section of sewer the final inspection shall be made on that line at the same time the ball test is made. Before the ball test is made, the Contractor shall complete all work on the portion of the line to be tested and dress up the ditches and remove all debris and complete the line in every way with exception of the ball test. As the ball test is made, the Engineer will inspect the entire length of the line including the cleanup. Any defects that are noted in the final inspection on each portion of the line shall be repaired by the Contractor. Whenever the work has been satisfactorily completed and the final inspec- tion completed, the City Engineer will issue a letter of acceptance to the developer with a copy to the Contractor. -24--