La_Vista_Irrigation_specs.docx

3-3.11 IRRIGATION

The Contractor shall be responsible for complete maintenance of the irrigation system, including piping, wiring, irrigation heads, automatic valves, automatic controllers, batteries and other irrigation improvements. All irrigation parts and materials which are damaged or broken by the Contractor's negligence or misuse shall be repaired or replaced by the Contractor at their own expense.

The Contractor as part of the maintenance shall inspect the irrigation system weekly. It is the Contractor's responsibility to ensure that the system is operating correctly and that there is adequate coverage. The Contractor is expected to thoroughly inspect and operate all components of the system at least once weekly and make minor repairs as needed. At the Manager’s discretion, the Contractor may be required to provide 24-hour advance notice of scheduled irrigation maintenance.

Minor Repairs: Repair and maintain the irrigation system from lateral tees or elbow to sprinkler heads or emitters to include: Replacement of damaged or malfunctioning heads, broken risers, damaged drip tubing or emitters, or other related parts of the irrigation system above the connection to the lateral line. It is the contractor’s responsibility to identify the cause of the damage.

Major repairs: Major repairs to the irrigation system such as main line repairs, valves, pumps, electrical troubleshooting, and repair, etc. Will be considered extra work provided with advanced approval of the landscape manager or designee on a time and material basis as at the rate specified by the contractor in the RFQ bid sheet. There shall be no major irrigation repair undertaken until a quote has been provided and approval has been issued by landscape manager or designee. Report all major repair and irrigation issues immediately to landscape manager or designee and quote for repairs.

All irrigation heads shall be kept cleaned and adjusted to maximize coverage and minimize overspray onto the roadway. Adjustments shall include raising or lowering spray heads to avoid obstructions to the flow of water, repositioning drip emitters, adjusting flow of valves and heads, etc.

All automatic valves and filters shall be kept flushed clean of sediment and debris and shall be maintained in proper working order. Valves shall be kept well-adjusted to insure efficient operation of the irrigation system. The interior of the valve boxes for meters, valves, quick couplers, flush valves, etc. shall be kept free of soil accumulation and other debris. All mainline pipes and backflow devices that are exposed above grade shall be wrapped in insulation material approved by the Manager at the Contractor's expense. The Contractor shall always maintain the insulation in good repair.

The Contractor shall be responsible for setting the automatic controller stations to the times and frequencies needed to properly irrigate plant materials. Plant material that dies from improper irrigation scheduling or unmade minor irrigation repairs shall be replaced at contractors’ expense. The Contractor shall also keep the controllers clean and free of insects and dust and shall make any necessary minor repairs. Any major malfunctions shall be brought to the immediate attention of the Manager. The severity of malfunction shall be as determined by the Manager.

No modifications may be made to the existing automatic irrigation system without express, written approval of the Manager. Any changes so approved shall be noted by the Contractor on a copy of the irrigation plan and submitted to the Manager within five (5) working days of completion of the work.

All repairs minor and major or new installations made to City irrigation shall be made with components from list of approved components (see Table 1). The Contractor shall contact the Landscape Maintenance Manager if special components not listed below are required.

Table 1: List of approved components

BFE 18x42x30

All piping to backflow shall be brass pipes or K copper – no galvanized