701 SECTION 670 WATERLINE INSTALLATION
670.1 -DESCRIPTION : This work shall consist of the construction or relocation of waterlines, including installation of gate and valve boxes, casing pipe, fire hydrants, water meter, meter boxes, and in reasonably close conformity with lines, grades, dimensions and locations shown on the Plans or established by the Engineer.
670.2 -MATERIALS : The material shall meet the requirements of the following subsections.
MATERIAL SUBSECTION Casing Pipe (Steel) 718.12 Cement lining 718.1.1 Controlled Low Strength Material, Type A 219 Copper Service Line 718.9 Copper Service Line Fittings 718.9.1 Ductile Iron Pipe 718.1 Fire Hydrants 718.13 Fittings 718.1.2 Flanged Joints 718.1.4 Gate Valves 718.10 Mechanical Joints 718.1.3 Meters 718.14 Miscellaneous Steel 718.15 Plastic Pipe (Polyethylene) 718.7 Plastic Pipe (PVC) 718.5 Plastic Pipe Fittings 718.8 Push -On Joints 718.1.3 Valve Boxes 718.11
CONSTRUCTION METHODS
670.3 -GENERAL : The Contractor shall furnish all materials, perform all excavation and backfill, construct all necessary joints and connections, install all valves, construct all necessary joints and connections, construct all appurtenances, install all temporary lines a nd dispose of all surplus excavation and discarded material and perform all work as may be necessary to complete the water line relocations and installations as set forth in these Specifications and as shown on the Plans. The Contractor shall assume all r isk and bear any loss or injury to property or persons occasioned by neglect or accident during the progress of the work. The Contractor shall exercise special care during the water line relocation so as not to damage any existing utility line or appurten ances. It is of prime importance that the Contractor, in the performance of their work, does not disrupt the operation of the existing water facilities in any manner or at any time without the express prior approval of the Engineer. Prior notice shall be given to the Engineer by the
702 Contractor of their intention to begin any work that will disrupt or appreciably alter normal system operation so that ample opportunity may be given to the Engineer to notify the owner to prepare for emergency operation, if n ecessary. The Engineer, upon advice of the owner, will have the sole right of determining at what times and in what order the Contractor shall undertake work involving connections and modifications to the existing system. The Contractor shall dig test pi ts as necessary to determine the size of fittings required for connections to existing lines. All material necessary for tie -ins shall be at the work site prior to any disruption of service. Once a connection is started, work shall be continuous until com pletion. The Contractor shall be responsible for the unloading, storing, hauling, and distribution of all materials and shall replace, at their own expense, all such material that is damaged, destroyed or lost during or after unloading. All pipe, pipe fi ttings, valves and accessories shall be handled in a manner in order to avoid shock and to protect the coating material. Material not needed for immediate construction shall be stored in a safe manner at places provided by the Contractor and approved by th e Engineer. If the Contractor should observe either proposed or existing sewers or water lines in close proximity the Contractor shall notify the Engineer. The Engineer will determine if the observed situation lacks conformity to the State Department of Health's Design Standards for Water Distribution Systems, its magnitude and the course of action. Additional costs necessitated by a modification in the plan of construction will be paid for in accordance with subsection 109.4.
670.4 -WATER PIPE : 670.4.1 -Trench Excavation: Excavation of the trench may be done either by hand or by the use of suitable trenching equipment. The invert profile as shown on the Plans shall be followed except where changes are aut horized in writing by the Engineer to avoid existing structures or to suit topography. The depth of trench shall be increased where necessary to procure a smoothly curved profile or to avoid existing structures. The trench shall be excavated in such a ma nner as to provide uniform and continuous bearing and support for the pipe and shall be excavated to the depth required to give a minimum of forty -two (42) inches cover from finished grade to the top (outside) of the pipe barrel, except under roadways wher e minimum cover shall be thirty ( 30) inches from subgrade to the top of the pipe barrel. The depth of cover may be modified at creek crossings or at other dips in the profile, when approved by the Engineer, providing it does not extend more than 100 feet with a cover of less than forty - two(42) inches. In the event it is required to decrease the cover to less than two ( 2) feet, the pipe line shall be insulated for that distance. Where stones, dry clay, hard pan, shale or cemented gravel are exposed at the bottom of the trench, the trench shall be excavated to at least three ( 3) inches and not more than six (6) inches below the specified grade. Where the bottom of the trench at gr ade is found to be unstable or include ashes, cinders, all types of refuse, vegetable or other organic material, the Contractor shall excavate and remove such unsuitable material to the width and depth ordered by the Engineer. The trench shall be backfilled to grade with approved material; replacement material shall consist of random material, as directed by the Engineer. Each layer shall not exceed four (4) inches compacted depth and shall be compacted in accordance with 670.4.5. The bedding shall be fin ished by means of hand tools to provide a uniform and continuous bearing and support for the pipe. Where the bottom of trench at grade is found to consist of material which is unstable to such a degree that in the opinion of the Engineer it cannot be rem oved and replaced with material suitable to support the pipe properly, the Contractor shall construct a foundation for