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This work shall consist of the construction or relocation of waterlines and fittings, including installation of valves and valve boxes, fire hydrants, water meters, meter boxes, special valves, special structures service lines and accessories, in accordance with these specifications and in reasonably close conformity with the lines, grades, dimensions and locations as shown on the Plans or established by the Engineer.
All materials shall meet the requirements of Division 10 shown below or as stated in the plans or Project Special Provisions:
Portland Cement Concrete Section 1000
Water Pipe and Fittings Section 1036
The Contractor shall submit to the Engineer catalog cuts and/or shop drawings for such materials as valves, hydrants, special fittings, lift stations, and manholes he proposes to use on the project. These shall be submitted by the Engineer to the State Design Services Engineer for review and approval. Forty days shall be allowed for the review of each submittal.
Materials which have not been approved shall not be delivered to the project. Eight (8) copies of each catalog cut and/or drawing shall be submitted and each shall show the material description, brand name, stock number, size, rating, manufacturing specification and the use for which it is intended.
1510-3 CONSTRUCTION REQUIREMENTS.
Waterline construction as a minimum shall meet the installation and material standards of the AWWA, unless specified otherwise.
The size, type and pressure rating class of waterline material shall be as shown on the plans and/or project special provisions.
All the requirements in Section 1505 for excavation, trenching and backfill shall apply to waterline installation.
All ductile iron water pipe shall be installed in accordance with laying condition Type 2 as stated in ANSI A21.51 (AWWA C151) unless otherwise shown on the plans.
The ends of the plastic water pipe shall be connected using approved compression type couplings and/or compression type fittings. Such couplings and fittings shall have been approved by the Engineer.
Polyvinyl chloride (PVC) water pipe 4" or larger shall require the use of Ductile Iron Water Pipe Fittings.
PVC pipe shall have its location marked by using a detectable marking tape, installed 18 to 24 inches below finished grade. Such tape shall be as approved by the Engineer.
Corporation stops shall be installed as shown on the plans and at each reconnected water service connection, on small water lines.
Curb stops shall be installed as shown on the plans and at each relocated water meter or at other locations as directed by the Engineer.
Curb stops shall be installed with an approved curb box. Curb boxes shall be of the telescopic type with a removal plug and lid with the word "WATER" cast therein.
Required service pipe to reconnect any disrupted water pipe to corporation stop or curb stop will be considered new pipe.
Bronze gate valves shall be installed on small water service lines at the locations as directed by the Engineer.
Tapping sleeves, valves, and valve boxes, shall be installed as shown on the utility plans, and/or as directed by the Engineer.
All valves shall be installed with an approved valve box, normally flush with the ground or pavement. Valve boxes shall be of the screw or slip type with a base to fit the valve yoke and removable plug cap with the word "WATER" cast therein.
Tapping saddles shall be installed as shown on the utility plans, and/or as directed by the Engineer.
The existing water meters and meter boxes that are to be relocated shall be installed at the locations shown on the utility plans, or as directed by the Engineer.
The relocation of water meters shall consist of the removal and installation at the appropriate location of the water meter, meter yoke, meter valve, and meter box. All work shall be in accordance with the applicable plumbing codes, as shown on the plans, and as directed by the Engineer.
Relocated meter boxes shall be placed with the top of the meter box flush with finish grade of project.
Fire hydrants shall be located and installed as shown on the utility plans.
All existing fire hydrants in the road construction area, and others that will be a hazard to the motorist, shall be relocated to 6 feet back of the curb, adjacent to the right of way, as shown on the plans, and/or as directed by the Engineer.
Existing fire hydrants to be relocated shall be separated at the hydrant base from the existing pipe and placed in the new location.
Where necessary, the hydrant shoe shall be removed and replaced with the appropriate type to connect the relocated hydrant to the new pipe. Hydrant extension pieces shall be furnished and installed or removed to provide the proper bury of the pipe and hydrant.
Pipe and appurtenances shall be handled in such a manner as to ensure delivery to the site and installed in a sound, undamaged condition.
Plastic pipe shall be stored out of direct sunlight until placement and all plastic pipe showing discoloration, or deterioration shall be rejected for use and replaced with suitable pipe, at no additional cost to the Department.
All pipe, fittings, and appurtenances shall be carefully examined for defects before placing, and any found defective shall not be used.
If, at any time before completion of the contract, any broken pipe or any defects are found in the lines or in any of their fittings or appurtenances, they shall be replaced.
1510-4 WATER SYSTEM INSTALLATION.
Pipe shall be laid in accordance with the specifications and the manufacturer's recommendations.
The full length of each section of pipe shall rest solidly upon the pipe bed with recesses excavated to accommodate the joints. All pipe that has the grade or joint disturbed after laying shall be taken up and relaid.
Pipe shall not be laid in water, or when weather conditions are unsuitable for the work. When work is not in progress, open ends of pipe and fittings shall be securely closed so that no trench water, earth or other substance will enter the pipes and fittings.
During the progress of the work and until the completion and final acceptance, the pipelines and their appurtenances shall be kept clean throughout. Any obstructions or deposits shall be removed.
Except where necessary in making connections with other lines or as authorized by the Engineer, pipe shall be laid with the bells facing in the direction of laying.
A minimum cover of thirty-six inches and a maximum cover of forty-two inches below finish grade shall be maintained over all pipes unless otherwise shown on the plans or directed by the Engineer. Due to the heights of valves, these depths shall be increased adjacent to the valves or varied at points of tie-in to existing lines are required.
The Contractor is herein forewarned as to the possibility of having to vary the depth of pipeline installation to achieve minimum clearance of existing utilities while maintaining minimum cover specified (whether existing pipelines, conduits, cables, mains, etc. are shown on the Plans or not).
Small diameter service pipe (4" or less) when placed under the existing pavement shall be installed by first boring a small hole slightly larger than the outside diameter of the pipe to be used and then inserting the pipe with a pilot guide attached through the bored hole.
Mechanical joints shall be made in accordance with the recommendations of the manufacturer. Joint bolts shall be drawn up equally around the entire periphery maintaining equal spacing from the gland to the face of the flange at all points around the joint. All bolts shall be tightened to within the following torque range.
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Rubber-gasket joints shall be handled, lubricated where necessary and installed in accordance with the recommendations of the manufacturer.
All screw type joints shall be made with a double wrap of teflon tape and shall be torqued as required by the manufacturer.
On new water lines and tie-in sections of existing water lines, the method of anchoring pipe bends, plugs, caps, tees, reducing sections, fire hydrants, valves, and related appurtenances will be the responsibility of the Contractor. Tying into existing water lines may alter such lines to the extent that these pipelines with existing pipe bends, plugs, caps, tees, reducing sections, fire hydrants, valves, and appurtenances may also require reaction backing; this work shall also be the responsibility of the Contractor.
The Contractor shall submit his proposed method of anchoring to the Engineer for review and approval prior to any applicable water line construction. Such approval will not relieve the Contractor of his responsibility of properly anchoring the water system.
All fire hydrants, pipe bends, tees, and plugs on water mains 4 inches in diameter or larger and other types of pipe as deemed by the Engineer to need restraint shall be provided with reaction backing, thrust blocking, metal tie rods with clamps or lugs or other approved method as may be required. Reaction backing masonry shall be Class B Concrete. The backing shall be placed between solid ground and the pipe fitting to be retrained. The backing shall be so placed that the fitting or joint will be accessible for repair. Steel rods and other metal clamps and lugs shall be protected by galvanizing or painting with approved bituminous paint.
In areas where the soil is firm and the required pressure tests do not exceed 150 pounds per square inch, pipe bends less than 22.5 degrees on pipe sizes less than 6 inches in diameter will not require restraint.
Fire hydrants shall be connected to the main with a 6 inch branch line having at least as much cover as the distribution main. Hydrants shall be set plumb with the pumper nozzle facing the roadway and with the breakaway safety flange between 1 and 4 inches above the finished surrounding grade. Except where approved otherwise, the backfill around hydrants shall be thoroughly compacted to the final grade immediately after installation in order to put the hydrant into service as soon as practicable.
Not less than 7 cubic feet of clean crushed stone shall be placed around the base of the hydrant to insure drainage of the hydrant barrel.
Tapping valves shall have a concrete block underneath to support the valve and prevent rotation of the valve and sleeve around the tapped main.
Where any section of a main is provided with concrete reaction backing for fittings or hydrants, the hydrostatic pressure test shall not be made until 3 days after installation of the concrete reaction backing, unless otherwise approved by the Engineer. The Contractor shall furnish all labor, materials, and appurtenances to perform the tests.
On tie-in sections, the Contractor may be required by the Engineer, to anchor pipe bends, tees, etc. with precast concrete blocking, timbers, rodding, or other approved method to allow the water line to be placed back into service as soon as possible.
Final connections to existing mains shall be made where indicated on the drawings, as required to fit the actual conditions, or as directed by the Engineer. The Contractor shall order materials, install the new line, provide thrust restraint, and perform sterilization and pressure tests on the new line prior to installation and tie-in of the new line into service. The completed work shall meet the approval of the Engineer.
The owners shall be notified in advance of any interruptions of water service with ample time to make arrangements. Interruption of water service on main lines shall be limited to a maximum of 8 hours unless approved by the Engineer.
1510-5 WATER SYSTEM - PRESSURE TEST, LEAKAGE TEST AND STERILIZATION:
Newly installed water mains and altered water mains shall be subjected to specified pressure tests, leakage tests, and sterilization prior to placing such pipelines into service.
Pressure tests and leakage tests on some short sections of pipelines and tie-in sections may not be feasible, however, such pipelines and tie in sections shall be sterilized.
Pressure tests, leakage tests, and sterilization of water pipelines shall be made as outlined herein. Similar data contained in "A Guide for the Installation of Ductile Iron Pipe", by the Ductile Iron Pipe Research Association, and data contained in ANSI/AWWA C600 and AWWA C651, may be used if necessary.
Before pressure testing installed water mains, other than lock joint type pipe, such mains including any valves and fire hydrants shall be secured and anchored by backfilling and tamping around the pipe, and by placing approved reaction backing at all pipe bends, dead ends, tees, and plugs for restraint. All pipe joints should remain uncovered, where possible for leakage inspection.
Corporation stops shall be installed at all elevated points along the pipeline in order to bleed off all entrapped air and aid in testing and flushing.
All water lines shall be flushed to removed sediment and other impurities before pressure testing, however, if in the opinion of the Engineer, the installed pipe does not require flushing, or if a chemical has been placed at all pipe joints during pipe installation, then initial flushing of the pipe may not be made. In order to save time and eliminate the disposal of excessive waste water, it is recommended that the water being used to pressure test shall contain the minimum 100 ppm chlorine.
After the installed pipe, fittings, valves, hydrants, corporation stops and end plugs are inserted and secured, the pipeline shall be subjected to a hydrostatic pressure of 150 psi for a period of 2 hours, by pumping the section full of clean water using an approved pressure pump.
Any cracked, damaged, or defective pipe, fittings, valves, hydrants, or other attachments discovered as a result of the pressure test, shall be removed and replaced with sound material. The tests shall be repeated until test results are satisfactory.
After the pressure test is complete, the Contractor shall make a leakage test. Such leakage test shall last at least 2 hours at a pressure of 150 psi and any leakage shall not exceed the amount determined by the following formula:
In which W equals the allowable leakage in gallons per hour; L is the length of pipeline tested, in feet; D is the nominal diameter of the pipe, in inches; and P is the average test pressure during the leakage test, in pounds per square inch.
When pressure testing or making a leakage test on a section of installed water pipe, the Contractor shall provide a centrifugal water pump, capable of delivering adequate water pressure, a small water control valve, and a calibrated pressure gage all interconnected to a calibrated water storage tank. The storage tank shall be used to supply and mix chlorine chemicals and measure quantities of chlorinated water to be pumped into the water main through a small pipeline from pump to valve, to pressure gage, to water main.
When the chlorinated water in the pipe being pressure tested has reached specified pressure limits, the control valve closed, and water pump stopped, the pressure gage will hold steady if there is no leakage. Any leakage can be measured by running the water pump with control valve in a partially closed position to maintain constant pressure and measuring the amount of water used from the calibrated storage tank, provided the leakage does not exceed pump capacity.
After the pressure and leakage tests have been completed and accepted, the pipe section shall be filled with clean water containing 100 ppm chlorine. The chlorinating material shall be liquid chlorine, hypochlorite or HTH material introduced into the pipeline from the calibrated storage tank noted herein or by other approved methods. The chlorinated water shall be allowed to remain in the pipe long enough for the chlorine chemical to destroy all non-spore forming bacteria. Except where a shorter period is approved by increasing the chlorine content the retention time shall be at least 24 hours or until chemical tests reveal a minimum of 10 ppm of chlorine in the chlorinated water line.
All valves on the lines being sterilized shall be opened and closed several times during the chlorinated period. The pipeline shall then be flushed with clean water until the residual chlorine is reduced to less than 1.0 ppm or at the same level as in the existing water mains. Samples of water shall be taken at representative points along the pipeline by the Contractor, in approved containers and submitted to a certified testing laboratory for bacterial and chlorine content.
Chlorinating of short sections of mains and connecting in sections shall be made by stockpiling, and spraying or swabbing inside of each pipe and fitting with clean water containing 100 ppm chlorine or other approved chemical, sealing each pipe opening, and allow same to stand for 24 hours or longer, then flushing the sections thoroughly before connecting into the system.
The pipeline being sterilized will not be accepted until satisfactory bacterial and chlorine limits have been obtained.
A copy of the test report shall be given to the Engineer and one copy to the water line owner.
The quantity of waterlines of the various sizes and types which has been incorporated into the completed and accepted work will be measured from end to end by the linear foot in place with no deduction for length through valves or other fixtures.
The quantity of ductile iron water pipe fittings will be measured based on the published weights for ductile iron fittings listed in ANSI/AWWA C110/A21.10 exclusive of the weights of any accessories. If the Contractor elects to use compact ductile iron water pipe fittings, measurement shall be based on the weight of standard size ductile iron water pipe fittings as published in ANSI A21.10 (AWWA C110). No measurement of the accessories will be made as the accessories are considered incidental to other work being paid for by the various items in the contract.
The quantity of the various sizes and types of stops, valves, sleeves, saddles, fire hydrants and other items listed in the pay items will be measured by the actual number of each of these items incorporated into the completed and accepted work.
If the contract does not include such pay items, measurement will not be done and the items for payment will be subsidiary to other contract pay items.
The quantities of waterline measured as provided in Article 15106, will be paid for at the contract unit prices per linear foot for each size and type shown below. The quantities of stops, valves, sleeves, saddles, fire hydrants and other items measured as provided in Article 15106, will be paid for at the contract unit prices each for the various sizes and types.
The quantity of ductile iron water pipe fittings, installed in accordance with the plans and provisions herein and accepted, will be measured and paid for at the contract unit price per pound (based on the published weights for ductile iron fittings).
The above prices and payments will be full compensation for furnishing and installing all materials, including pipe, accessories, fittings, compression couplings, detectable marking tape, anchoring, connections, valve box installation with necessary extensions, pressure test, leak test, sterilization, excavation, backfilling, compaction and incidentals necessary to complete the work as required.
Payment will be made under:
______ inch D.I. Water Pipe Class _____ _____ # WP Linear Foot
______ inch D.I. Water Pipe PC ________ Linear Foot
______ inch D.I. Restrained Joint Water Pipe, Class ____ ____ #WP Linear Foot
______ inch Copper Water Pipe, Type______ Linear Foot
______ inch PE Water Pipe, SDR ______, ______ # WP Linear Foot
______ inch PVC Water Pipe, SDR ______, _____ # WP Linear Foot
______ inch PVC Water Pipe, (C-900), DR _____, ____ # WP Linear Foot
Ductile Iron (See Standard Special Provisions) Pipe Fittings, 250 # Min. WP Pound
______ inch Corporation Stop Each
______ inch Curb Stop Each
______ inch Gate Valve and Valve Box ______ # WP Each
______ inch Bronze Gate Valve and Valve Box ______ # WP Each
______ inch Tapping Sleeve, Valve and Valve Box, ______ # WP Each
______ inch X _____ inch Tapping Saddle Each
Relocate existing water meter Each
Fire Hydrant______ # WP Each
Relocate Existing Fire Hydrant Each