§ 114-101. Irrigation Standards.

All proposed irrigation systems shall meet the requirements of this section.

(a)

Water can be conserved through the use of a properly designed, managed, maintained, and timed irrigation system. Irrigation systems shall only provide coverage to target areas, and shall be installed in such a manner as to minimize spray upon public sidewalks, streets, or adjacent properties. Irrigation systems shall include the use of low volume, low pressure, subsurface irrigation systems, and other such methods which encourage water conservation. All automatic lawn or landscape irrigation systems shall be equipped with and operate a moisture sensor or approved automatic switch which overrides the irrigation cycle when adequate rainfall and/or soil moisture level has occurred.

(b)

Irrigation plans must be designed to recognize differential irrigation requirements of the landscape. The irrigation plan shall be designed by a Registered Landscape Architect and/or a Certified Irrigation Specialty Contractor. The irrigation plan shall include the following:

(1)

Irrigation point(s) of connection (POC) and design capacity;

(2)

Water service pressure at irrigation POCs;

(3)

'Water meter size;

(4)

Reduced-pressure-principle backflow-prevention devices for each irrigation POC on potable water systems;

(5)

Major components of the irrigation system shall include, but not be limited to; smart controller, rain sensors, pumps, filters, valves, mainline pipes, lateral pipes, controllers, flow sensor, spray heads, drip, low-volume irrigation equipment, tubing, and pipe sizes;

(6)

Precipitation rate expressed in inches per hour for each valve circuit. The preparer must attach calculations for deriving precipitation rates for each irrigation valve circuit;

(7)

Total flow rate (flow velocity not to exceed five (5) feet per second) in gallons per minute (gpm) and operating pressure (PSI) for each individual overhead and bubbler circuit, and gallons per hour (GPH) and operating pressure for low-flow point irrigation circuit;

(8)

Irrigation legend must have the following elements: Separate symbols for irrigation equipment. For each irrigation head type the legend shall show coverage patterns, precipitation rates, operation pressure requirements, gallons required and associated time periods, brand and model names, and pressure compensating devices (if applicable) and a general description of other equipment, including brand name and model number, sizes, special features, and materials. For all specified equipment for low-flow systems, the legend shall contain recommended operating pressure, brand name and model names, precipitation rates, distribution patterns, and spacing of emitters or drip tubing;

(9)

The same requirements for use of a recycled water irrigation system shall apply. Reclaimed water, gray water, or other nonpotable water shall be used for irrigation provided an acceptable source for that water is available;

(10)

Identify location of the rain shut-off devices and any soil moisture sensors; and

(11)

The irrigation system must account for slopes over ten percent (10%) and elevation differences over five (5) feet. If the irrigation plan does not show design for these situations, a grading plan is required which shall indicate finish grades by either spot elevations or contours or both along with drainage patterns within the developed irrigated areas.

( Ord. No. 006-2016 , § 1(Exh. 1), 4-13-2016)