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Section 20 - Landscaping

20-4.09 Measurement and Payment

Planting work will be paid for at a single lump sum price or at unit prices for separate items

of planting work, as designated in the Contract. Full compensation for providing planting work is

included in the prices paid for the various items and no additional compensation will be paid.

20-5 IRRIGATION SYSTEMS

Irrigation system materials shall be as specified in Section 50-43, “Landscaping Materials” of

these Specifications.

20-5.01 Maintain Existing Water Supply

The Contractor shall notify the Agency and the property owner, manager, or tenant at least

forty-eight (48) hours prior to shutting off the water supply to any portion of an existing irrigation

system. The Agency and the property owner, manager, or tenant shall also be notified when

the water supply is returned to said portion of the irrigation system.

Where work is performed on an existing irrigation system, the system shall be checked by

the Contractor for proper operation after the work is completed and any malfunctions resulting

from the Contractor's operations shall be corrected at the Contractor's expense. If the work will

interrupt the water supply for more than twenty-four (24) hours, the Contractor shall water

existing landscaping, including that being maintained by Agency landscape maintenance forces,

in the area irrigated from that water supply as often as necessary to maintain healthy plant

growth. The watering will be at the Contractor’s expense. At the option of the Contractor,

temporary connections to an operational existing irrigation system may be made as approved by

the Agency until the interrupted water supply has been restored.

20-5.02 Remove Existing Plants for Trenching

Where trenching for new irrigation facilities is performed in areas planted with existing trees

or shrubs, the trenching alignment shall be adjusted as necessary to avoid damage to such

trees or shrubs and their root systems.

Where trenching for new irrigation facilities is performed in existing ground cover or turf,

sufficient plant material shall be removed to permit the proper installation of such facilities, but in

no case shall the removal width exceed five feet (5’). All turf repair or ground cover replacement

planting shall be performed before the start of the plant establishment period, or at least

fourteen (14) Calendar Days prior to the acceptance of the Contract if there is no plant

establishment period.

20-5.03 Electrical Service for Electric Automatic Irrigation Systems

Electrical service for electric automatic irrigation systems shall conform to Section 49,

“Signals, Lighting and Electrical Systems”, of these Specifications and Standard Drawing 5-8,

”Signal, Lighting and Electrical Systems Metered Service Can”, of the County Improvement

20-5.03.A Components

Electrical components for electric automatic irrigation systems shall include irrigation

controllers with weatherproof enclosures; remote control valves; valve boxes; pull boxes;

conductors between controllers, pumps and valves; moisture sensors; rain switches; and all

appurtenances, incidentals, and accessories required for proper installation and operation of the

electrical portions of such systems.

Electrical components requiring modifications to conform to the specified requirements shall

have such modifications made by the manufacturer before shipment to the project.

Components shall also include the electric service pedestal for the irrigation controller.