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 appurtenances. 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 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 necessary. 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 pits 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 completion. 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 fittings, 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 the 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 backfill ed 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 the pipe, consisting of concrete, pilings, timber or other materials or as directed by the Engineer. Where excavation is made in rock o r boulders, the rock shall be removed to provide a clearance of at least six (6) inches for pipe twenty-four (24) inches in diameter or smaller and at least nine (9) inches for pipe larger than twenty-four (24) inches in diameter, below and on each side of all pipe, valves and fittings. The trench shall be backfilled to grade with approved material in four (4) inches layers loose depth. Each layer shall be thoroughly compacted in accordance with 670.4.5 and the bedding shall be finished by means of hand to ols to provide a uniform and continuous bearing and support for the pipe. The width of the trench shall be ample to permit the pipe to be laid and jointed properly and to permit the backfill to be placed and compacted as specified. Trench widths shall be in accordance with Table 670.4.1. Excessive trench widths will not be permitted. Where necessary for protection of workers or to avoid undermining or otherwise damaging structures or property, the trench shall be properly and sufficiently shored and braced to prevent caving, slipping or cracking of the sides. Where bracing, sheeting or shoring are required or extra width is required for handling of specials, the trench shall be of such extra width to accommodate these items. TABLE 670.4.1 Pipe Diameter (Inches) Trench Width (Inches) Pipe Diameter (Inches) Trench Width (Inches) Pipe Diameter (Inches) Trench Width (Inches) 2 18-26 10 22-34 20 32-44 3 18-26 12 24-36 24 36-48 4 18-28 14 26-38 30 42-54 6 18-30 16 28-40 8 20-32 18 30-42 Blasting for excavation will be performed only after securing the approval of the Engineer and only when proper precautions are taken for the protection of persons or property. The hours of blasting will be fixed by the Engineer. Any damage caused by blasting shall be repaired by the Contractor at their expense. The Contractor's method of procedure relative to blasting shall conform to local and state laws. The Contractor shall exercise reasonable care to avoid damage to trees and hedges; electric, telephone and gas lines and installations; sewer lines; buildings; roads and all appurtenances thereto. Care shall be used to maintain driveways to permit free access to and from the different properties by the owners. All excavated material shall be piled in a manner that will not endanger the work and will not obstruct sidewalks and driveways. Fire hydrants under pressure, valve boxes, service stop boxes, fire and police boxes or other utility controls shall be left unobstructed and ac cessible. Gutters shall be kept clear or other satisfactory provisions made for drainage, and natural watercourses shall not be obstructed. All trenches, material piles, equipment and pipe which may cause a hazard or serve as obstructions to either vehicul ar or pedestrian traffic shall be enclosed by fences or barricade, adequately lighted, to protect persons from injury and to avoid property damage. Where traffic must cross open trenches, the Contractor shall provide suitable bridges, which will be subject to approval by the Engineer. The Contractor shall furnish temporary support, adequate protection and maintenance of all underground and surface structures, drains, sewers and other obstructions encountered in the progress of the work. 670.4.2-Laying and Joining: Proper implements, tools and facilities satisfactory to the Engineer shall be provided and used for the safe and convenient prosecution of the work. All pipe, fittings, valves, specials, and fire hydrants shall be carefully lowered into the trench piece by piece by means of a derrick, ropes or other suitable tools or equipment in such a manner as to prevent damage to the water main materials and protective coating and linings. Under no circumstances shall water main materials be dropped or dumped into the trench. All pipe and fittings shall be carefully examined for defects and no pieces shall be laid which are known to be defective. Any defective or damaged pipe will be rejected. If any defective piece shall be discover after having been laid, it shall be removed and replaced at the Contractor's expense. All pipes and fittings shall be thoroughly cleaned before they are laid and shall be kept clean until accepted in the completed work. Pipe which has been contaminated by mud or soil shall be cleaned with a swab. The pipe shall be supported its full length by the uniform grade of the trench. Pipe ends shall not be left open, such as at the end of a day's work or during temporary suspension of construction, but shall be securely covered to preve nt the entry of foreign matter or small animals. Kinks or sharp bends giving excessive deflection or which put pipe joints in strain will not be permitted. Table 670.4.2 shows the Maximum permissible for various types of joints or pipe. TABLE 670.4.2 MAXIMUM PERMISSIBLE DEFLECTION PER JOINT A. "Push On" Type Joint Pipe: Pipe Diameter (inches) *Maximum Deflection for 18-ft Length (inches) 4 thru 12 19 14 thru 24 11 * Permissible deflection per joint for lengths more or less than 18 feet are proportional.
670.10 House Connection:
The work to be performed under this item shall consist of furnishing and installing all pipe, taps, couplings and fittings necessary to provide a connection from the relocated line to a point where the existing house connection is reconnected. Construction methods shall be as described in 670.4.
670.11 Method of Measurement:
670.11.1 Water Pipe: Water pipe will be measured by the linear foot in place. The
measurement will be made along the centerline of such pipeline, before backfilling, to or from the following described points: i At the centerline of the connection where work begins or ends and c onnection is made to an existing pipe or special. ii At the centerline of the special casting or connection that is part of the new pipeline. iii At the centerline of a fire hydrant or at the face of a dead plug, dead cap, flange, or spigot at the end of the new pipe line. iv At the ends of new inserted material, where connection is made by breaking and insertion in an existing pipeline. This inserted material, regardless of size, will be considered being of the same size as the connecting pipe and paid for as such. No deduction in length will be made for valves or fittings.
670.11.2 Casing Pipe: Casing pipe will be measured by the foot in place. The
measurement will be made along the centerline of each pipe installed.
670.11.3 Gate Valve and Valve Box, Fire Hydrants, Meters, Meter Valves and
Appurtenances, and Special Structures: These items will be measured by the unit.
670.11.4 House Connections: House connections will be measured foot of pipe, measured
along the centerline, complete in place including all taps and all couplings, goose necks, corporation stops, curb cocks, curb boxes or other material necessary to complete the work.
670.12 Basis of Payment:
The quantities, determined as provided above, will be paid for at the contract unit prices bid for the items listed in 670.13, which prices and payments shall be full compensation f or excavation and backfill, except as otherwise provided, testing, disinfecting, thrust blocking, connecting to valves and fire hydrants, all branch connections, fittings, drains, blowoffs and service connections, reinforcing steel, manhole frame and cover , the repair and repaving of areas not otherwise provided for in the Plans, the removal of all surplus material and clean up, furnishing of all materials and doing all work prescribed in a workmanlike and acceptable manner, including all labor, tools, equipment, supplies, and incidentals necessary to complete the work. When unsatisfactory foundation materials encountered at the bottom of the trench, there will be no additional compensation for such excavation and backfill, unless the required excavation and replacement exceeds one (1) foot of depth. Excavation and replacement material in excess of one (1) foot, and any special foundation not called for on the Plans will be paid for in accordance with 109.4. When boring and jacking of casing pipe is specified in the Contract, the cost of the boring and jacking operations will not be paid for separately but shall be included in the unit price bid for the respective casing pipe pay items. If the Engineer determines that field conditions necessitate the boring and jacking of casing pipe not so specified, the casing pipe pay item as originally specified will be non-performed and the cost for such boring and jacking operations, including the cost of the casing pipe, will be paid for in accordance with 109.4.
670.13 Pay Items:
ITEM DESCRIPTION UNIT 670001-* “size” Cast Iron Pipe Type, “type**” , Class “class” Linear Foot 670004-* “size” Ductile Iron Pipe, Type “type**”, Class “class” Linear Foot 670007-* “size” Plastic Pipe, Class “class” Linear Foot 670008-* “size” Copper Service Pipe Linear Foot 670009-* “size” Gate Valve And Valve Box Each 670010-* “size” Steel Casing Pipe, Thickness “thickness” Linear Foot 670013-* “size” Fire Hydrant Each 670014-* Relocate Fire Hydrant Each 670015-* “size” Meter Each 670016-* Relocate Meter Each 670017-* Meter Box Each 670018-* Relocate Meter Box Each 670019-* Special Valve, Type “type” Each 670020-* Special Structure Each 670021-* “size” House Connection Linear Foot 670023-* Adjust Valve Box Each * Sequence number “type**” in accordance with the table below: Type I-Push On Type Joint Type II-Mechanical Joint Type III-Bell And Spigot Joint Type IV-Flanged Joint Type V-Flexible Joint SECTION 671 THROUGH SECTION 674-BLANK
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