1. Scope of Work
These general specifications cover the furnishing and installing of all materials, all equipment, and the performance of all work necessary for the installation of the following improvements: water mains, gate valves, fittings, fire hydrants, and all other appurtenances, complete, tested, and in proper operating conditions as shown on the Plans and as described herein.
2. Materials, Equipment, and Installation Procedures
Facilities shall be constructed as shown on the Plans and in accordance with these specifications. Manufacturer's equipment shall be installed in compliance with the specifications of the manufacturer, except where a higher quality of workmanship is required by the plans and specifications. All material and work shall be in strict accordance with any applicable regulations of the State and local authorities. The Installer shall arrange for such inspections as these agencies may require and shall submit evidence of their approval where requested by the District. Except where depth is required to clear underground obstructions or where otherwise accepted on the Contract Plans or to follow future road grades, a minimum of 36 inches of cover will be required over all water mains to be constructed by the Installer.
3. Existing Utilities
Locations of various existing utilities, such as telephone lines, gas lines, water mains, storm drains, and other obstructions may not be shown on the Plans.
The Installer shall locate obstructions by inquiring with the utility facility operators and by exploring in advance of excavation. The Installer shall adhere to the statutory requirements of RCW 19.122 whenever excavation is performed on the Project.
The Installer shall excavate around and under existing utility facilities with special care and shall support and maintain them.
Where it is necessary to remove or reconnect any existing facility, the Installer shall make necessary arrangements with the respective utility facility operator, and the Installer shall bear all cost which may be involved. Any utilities damaged in the course of construction shall be repaired or replaced to serviceable conditions at the Installer's expense.
4. Order of Construciton
Restoration of trenches shall be complete within five (5) working days after installation of pipe. The District will inspect and observe the hydrostatic test of pipe within 24 hours after notification by the Installer that a section is ready for inspection and test. The Installer shall contact the District at least 24 hours in advance of the completion of sterilization and flushing, and his representative shall take water samples in the presence of the District's Inspector. The Installer is responsible for submitting samples to the laboratory and payment of laboratory fees.
5. Restoration
All trench areas within public rights-of-way shall be restored in accordance with the requirements of the agency having jurisdiction. All other improved areas disturbed by trenching shall be restored to a condition equal to or better than the original condition.
Unimproved areas shall be cleaned, trimmed, and smoothly graded; and all slashings, roots, and other debris shall be removed from the construction site. The area shall be reseeded with an appropriate grass mixture.
6. Traffic Control
The Installer shall conduct their operation so as to minimize the interference with automotive and pedestrian traffic. All traffic control plans and operation are subject to approval by the PUD and agency having jurisdiction of the right of way.
Soft backfill or gravel in trenches shall be plainly marked so as to warn motorists, and access shall be provided for all driveways and parking areas. All work shall be carried on with due regard for the safety and convenience of the public. Open trenches shall be provided with barricades that can be seen at a reasonable distance at night and shall be adequately lit. An adequate number of lighted signs for detours and construction in progress shall be provided. Safety instructions shall in no way relieve the Installer of their responsibility or liability.
A minimum of one-way traffic shall be maintained at all times. Where one lane of traffic is to be obstructed by the construction, the Installer shall provide properly equipped flagmen at each end of his/her operation to direct traffic; and sufficient signs, barricades, or other warning devices shall be provided to reduce the speed of the traffic approaching or leaving the construction area. The traffic control and the warning signs shall be placed and maintained in a manner satisfactory to the governing agency and the District.
No roads may be closed without permission of the governing agency.
9. Construction Staking
All work shall be to the alignment shown on the Plans or approved revisions. Upon request by the District, the Installer shall stake, within two (2) working days, the horizontal locations and/or reference benchmarks of water mains.
10. Culvert Extensions
Culvert extensions may be required for installation of the water mains in various locations. When water mains are installed across ditches, culvert extensions will be required to ensure uninterrupted flow in the ditch. The culvert shall be installed in the ditch prior to trenching or tunneling the water main under the ditch. The water main trench shall be suitably backfilled and compacted around the culvert to avoid diversion of the waters upon completion of the installation.