194-18 Construction requirements.
A. Work performed by the Department of Public Works. In the event that the Department of Public Works, Water and Sewer Division, is involved either in the installation of a new service or relay to a single-family residence or repairs to an existing service, the work shall be performed in accordance with the following rules and regulations:
(1) Trenches or areas of excavation, after completion of the scheduled installation or repairs, shall be rough graded and hand raked. Permanent repairs on the landowner's property (i.e. loaming, seeding, cold patching and hot topping of drives and walks, cement sidewalks, steps, etc.) shall be his or her responsibility.
(2) Fences or walls of any kind, if not removed by the landowner, will, if within the Department's means and capabilities, be removed and stacked on the landowner's property. Upon completion of the Department's work, re-erection or rebuilding shall be the responsibility of the landowner.
(3) Trees, bushes, shrubs, hedges, flowers, lawn ornaments, etc., if not removed by the landowner, will, if within the Department's means and capabilities, be removed and stacked on the landowner's property. Upon completion of the Department's work, replanting or replacement of these items shall be the responsibility of the landowner.
(4) In the event that the Department's work necessitates the cutting of roots of trees, bushes, shrubs, hedges, etc., the city will not be responsible for their continued life.
(5) The landowner shall be responsible for notifying the Department of any underground wiring, wells, septic system, pipes, drainage pipes, etc., that may be in the line of construction. Unless the Department is notified in advance, the city will assume no liability for resulting damages.
(6) All decisions pertaining to subsection A(1) through (5) above will be subject to appeal to the Public Works Committee of the City Council.
B. Work performed by developers and/or private contractors. In the case of a water extension on or to a new development and on or to any private development, the owner of the property or the developer thereof shall construct and install the water mains and house connections in accordance with the following rules and regulations.
(1) There shall be submitted to the Commissioner of Public Works, in the case of a new development which has the approval of the Planning Board, a plotted plan which has been recorded in the Middlesex South District registry of deeds. Other private projects approved by appropriate city agencies shall also submit a plan of proposed water system.
(2) Any and all plans for a water system in the City of Marlborough will show and/or specify the following: all mains will be a minimum of eight inch ductile iron pipe, Class 52, cement lined mechanical joint or push-on joint in accordance with A.W.W.A standards. All mains over eight (8) inches in diameter will be cast iron or ductile iron, including nipple pieces. All hydrant branches shall be six (6) inch cast iron. All intersections of mains will be gated in their respective directions. No main will extend over one thousand (1,000.) feet in length without the use of a gate valve. All hydrants will be within five hundred (500) feet of each other or so
spaced at the direction of the Department of Public Works or the Fire Chief. All hydrants will be gated. All taps to the existing public system will specify a tapping sleeve and gate valve.
(3) Any contractor involved in waterworks construction in the City of Marlborough will strictly adhere to the provisions set forth in 194-17. No equipment, tools or material will be rented or loaned from the Department of Public Works. All material used must be of the same make and quality as set forth hereinafter.
(4) Costs. All labor and material costs to install a water system as specified herein will be borne by the owner, developer or contractor, whatever the case may be. Costs for taps into the public system and the restoration thereof of any public way will be borne by the owner, developer or contractor.
(5) Inspection will be provided by the City of Marlborough only on a limited or part-time basis. Before any backfilling is done, the Department of Public Works Water Division will be notified twenty-four (24) hours in advance, and a man will inspect the completed work. This method of operation will be used for hydrant installation, main taps, service taps, etc. If the Department of Public Works feels that insufficient workmanship and care is being taken in the installation, a man will be assigned from the Department of Public Works on a full-time basis. The contractor or owner will bear the cost of this man at his hourly wage rate, Monday through Friday, from 7:00 A.M.
to 3:30 P.M.. Any time spent on the site, not within these limits or Saturday, Sunday, holidays, etc., will be at twice the man's rate.
(6) Excavation in any public way will require a road opening permit from the Department of Public Works. Necessary forms may be obtained and filed with the Department of Public Works Street Division. It will be the contractor's responsibility to notify utility companies, such as gas, telephone, electric, etc., if there is any possibility of there equipment or their property being jeopardized by excavation. It shall also be the contractor's responsibility to notify the Fire Department and Police Department of said work to be performed and, if necessary, to hire uniformed police for traffic control. In the event that the roadway cannot be restored to its normal
surface immediately following the work, sufficient care will be taken to make the roadway smooth for traffic and, if necessary, to light with flashers as a warning to motor vehicles.
(7) Before any water mains, water services or hydrants are installed in a new subdivision or development, the contractor will bring the entire site where these utilities are located to subgrade, such grade will be verified by grade stakes provided any set by a registered land survey or engineer employed by the owner or contractor so that the Engineering Division of the Department of Public Works may expedite their checking of such grades.
(8) Water mains. All water mains shall be ductile iron Class 52, cement-lined mechanical joint or push-on joints in accordance with A.W.W.A standards. Excavation will be to a depth that provides a minimum or five (5) feet of cover over the pipe. If excavation is in ledge, a minimum of 12 inch spacing around the pipe will be required to allow for selected backfill material. It will be at the discretion of the Department of Public Works as to the type of bedding used and will depend on field conditions. In any event, it will be either crushed bank gravel or three-fourths inch stone. No stones larger than three (3) inches in diameter may be used within the
first foot of backfill over the pipe. Once the pipe has sufficient cover with selected material, normal backfilling may proceed with care. Jointing of push-on or tyton joint cast iron will be with the use of a come-along or bar. If a bar is used, a block of wood will be used between it and the pipe; the same applies for having a backhoe set larger diameter pipe, a block of wood will be inserted between the bucket and the pipe; in no event will there be a metal-to-metal driving force to set the pipe. If this is not strictly complied with, the length of pipe will be removed and a new one used in its place.
(9) Hydrants will be Mueller, meeting the A.W.W.A improved type standards; open right, five-and-one-half foot bury, four-and-one-half inch valve opening with bell and inlet for a six inch pipe. All hydrants to be on and in the center of at least a two (2) foot diameter sump by one (1) foot deep consisting of three-fourths-inch stone for drainage purposes. No hydrant shall be placed within fifteen (15) feet of a driveway or access road.
(10) Thrust blocks. All plugs, caps, tees, bends and hydrants shall be provided with a concrete thrust block to prevent movement.
(11) Main gate valves and boxes.
(a) Main gate valves shall be open right, iron body, bronze mounted, double disc, non-rising stem as manufactured by Mueller Co. or approved equal.
(b) Main gate boxes shall be cast-iron, slide type with at least six (6) inches of adjustment and at least five (5) feet long. The covers shall be flush, close-fitting with the letter "W" or the word "water" cast into the cover.
(12) Main line taps will always be done with the use of a tapping sleeve and gate valve. The tapping sleeve to be Mueller or approved equal. If the contractor is to make the tap himself, he must furnish evidence of his competence through previous work and have the necessary tools to perform the work satisfactorily.
(13) Connections.
(a) Service connections shall have a minimum size of three-fourths (3/4) inch in diameter. All service pipes shall be type K copper tubing. Any service pipe larger than two (2) inches and less than eight (8) inches in diameter shall be ductile iron Class 52, cement lined mechanical joint or push-on joint in accordance with A.W.W.A standards.
(b) Plastic tubing will be copper tube size for use with standard stops and fittings with A.W.W.A outlets or compression©type outlets with a minimum of one hundred sixty (160) pounds per square inch.
(c) All connections to the main will be made by the use of a two-strap corporation saddle by either Smith-Blair or Mueller. A curb stop and box shall be installed at the property line on the owner's side of each service. The curb stop shall be copper to copper Thread, open right, with drain, as manufactured by Farnum or Mueller. Any service one (1) inch or greater shall employ an oriseal curb with drip. The service line shall be installed at 90 from the road, unless otherwise approved by the Department of Public Works. Under no circumstances will any inverted key curbs be installed in any water system in the
City of Marlborough. The curb box or service box shall be four-and-one-half (4 1/2) to five-and-one-half (5 1/2) feet, extension-type, three-fourths inch rod, and cover to be with counter sunk one inch brass plug tapped for one inch iron pipe. Minimum cover for services shall be five (5) feet zero (0) inches. A sand backfill material will be carefully placed around the service pipe to protect it from normal backfill and compaction. On the inside of the building there shall be a meter as manufactured by Badger Meter or its approved equal with a reado-matic outdoor meter register or its approved equal. All meters are to be set by the owner or developer, or as stated in 194-16. Each meter will have a gate box, before and after, and each valve willbe within one (1) foot zero (0) inches of the meter. Where pressures are in excess of eighty (80) pounds per aquare inch, a pressure-reducing valve will be employed in the line.
(14) Testing.
(a) The contractor shall furnish a water meter pressure gauge, testing plugs, pumps, pipe connections and other required apparatus. The section of pipe to be tested will be completely filled with water and air blown off through a high point, such as a hydrant. The section under test will be maintained full and under pressure for a period of twenty-four (24) hours. The line shall be filled and tested within one (1) to three (3) days after filling.
(b) Any failure of the various pipelines, structures, valves, hydrants and related accessories that occurs before final acceptance of the work shall be replaced at the expense of the owner. A successful water pressure test is not to be interpreted as final acceptance.
(c) The pressure and leakage test shall consist of first raising the water pressures (based on the elevation of the lowest point of the section under test and correct to the gauge location) to a pressure in pounds per square inch numerically equal to the pressure rating of the pipe. While maintaining this pressure, the contractor shall make a leakage test by metering the flow of water into the pipe. If the average leakage during a two-hour period exceeds a rate of ten (10) gallons per inch of diameter per twenty-four (24) hours per mile of pipeline, the section will be considered as having failed the test.
(15) After testing. The completed pipeline is to be disinfected with a chlorine concentration of approximately fifty (50) parts per million prior to being placed in service. The introduction of this chlorine shall be accomplished by pumping or siphoning a calcium hypochlorite solution into the main. The chlorinated water is to remain in the new pipeline for a period of twenty-four (24) hours. During this period, proper precautions are to be taken to prevent this chlorinated water from flowing back into the existing system.
(16) As-built plans will be furnished to the Department in duplicate by the contractor or owner at the completion of the project. The plans in particular will depict exact distances between gate valves, ties to gate valves, both in the main and on hydrant branches. Curb box location referenced to the house or building that it serves by at least two (2) ties from permanent points.
(17) Warning ribbons.
(a) If non-metallic pipes are used in the installation of any water main or service pipe, a warning ribbon shall be used. Said ribbon shall be blue in color and imprinted with the words "caution, water line below," or words of similar intent, and shall be metallic to provide future locating with inductive tape locators.
(b) Tape shall be spliced and securely tied around all gate boxes and/or curb boxes to facilitate conductive location.
(c) Depth of burial shall be in accordance with the manufacturer's standards, except that the burial shall not be at a depth of less than eighteen (18) inches nor at a depth greater than forty-eight (48) inches.
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