15.24.050 Irrigation design plans and specifications.
An irrigation design plan meeting the following conditions shall be submitted as part of the landscape documentation package:
A. Runoff and Overspray. Soil types and infiltration rate shall be considered when designing irrigation systems. All irrigation systems shall be designed to avoid runoff, low-head drainage, overspray, or other similar conditions where water flows onto adjacent property, nonirrigated areas, walks, roadways or structures. Proper irrigation equipment and schedules, including features such as repeat cycles, shall be used to closely match application rates to infiltration rates therefore minimizing runoff.
B. Separate landscape water meters shall be installed for all projects except for single-family homes or any project with a landscaped area of less than one thousand square feet.
C. Automatic control systems shall be required for all irrigation systems and must be able to accommodate all aspects of the design.
D. Irrigation systems shall be designed to be consistent with hydrozones.
E. The irrigation design plan shall use the same format as the landscape design plan. The scale should be the same as that used for the landscape design plan.
F. The irrigation design plan shall accurately and clearly identify the following:
1. Location and size of separate water meters for the landscape, if applicable;
2. Location, type and size of all components of the irrigation system, including automatic controllers, main and lateral lines, valves, sprinkler heads, moisture sensing devices, rain switches, quick couplers and backflow prevention devices;
3. Static water pressure at the point of connection to the public water supply;
4. Flow rate (gallons per minute), application rate (inches per hour) and design operating pressure (psi) for each station. (Ord. 93-02 (part), 1993)