Pressurized Irrigation

The City of Kuna has six pressurized irrigation pump stations; three of the facilities have ponds that store irrigation water to help manage flow at peak use times. The City generally starts the pressurized irrigation system in mid-to-late April depending on when the Boise Project Board of Control (Boise~Kuna Irrigation District) or New York Irrigation District allow us to take delivery of the water. The crews start to fill the lines with low pressure water so we can find and fix breaks before the system reaches full pressure. The first couple of weeks of this process are the hardest because of the possibility of potential breaks in the main lines and service connections. We understand that the citizens want their irrigation water as soon as possible so we make every effort to provide them with their irrigation water as quickly as we can.

Low Water Pressure

Periodically the City residents will experience lower than normal water pressures caused by too many customers irrigating at the same time. When pressures are low, your sprinklers will not provide the coverage for which they were designed and your lawn will develop dry spots. The hours from 4:00 am to 8:00 am are particularly heavy use times. If you experience low pressure, change your timers to irrigate at a different time of day. We recommend the hours from 10:00 am to 10:00 pm (daytime) as these times are generally under-utilized. In Fact, the demand is often so low the city has to waste water to drainage ditches during these hours.

The Best Time-of-day to Irrigate

 The City pressure irrigation system is designed to operate 24 hours per day, 7 days per week. Water is delivered to the system from the canals at a constant rate. The system works best, and most efficiently, if user demand throughout the 24 hour day matches the constant delivery rate. In actual practice, users heavily concentrate their use in the early morning hours, particularly in the from 4:00 am to 8:00 am, and drastically under-utilize the system during the hours of 10:00 am to 10:00 pm (daytime); it works best to set your sprinklers to avoid these heavy use times.

Backflow Prevention

Backflow prevention is an important responsibility of all users of the drinking water system. "Backflow" is a condition in which potentially contaminated water contained in non-potable pipes (such as a sprinkler system) flows "back" through a common connection into our drinking water system due to changing pressures in each system. "Backflow" can be prevented through installation of special devices called "backflow preventers" installed at the common connection between the two systems. It is the law, and an issue of public health and safety, that proper "backflow preventers" are installed at all connections between potable and non-potable pipes.

"Backflow preventers" are required to be inspected annually by certified technicians with the results reported to the City Water Department. A number of private certified technicians are available to perform this task. The City also always has at least one certified technician on staff to do inspections and answer questions about "backflow" issues. Failure to provide "backflow preventers" where required or to stay up-to-date on annual inspections may result in disconnection of water service. City staff are available to answers questions or to meet on-site as needed. The Water Department is very interested in keeping our drinking water safe for all of our citizens.

Irrigation Conservation Regulations and BMPs

7-8-10(E) Alternate day irrigating: Irrigation from the Kuna municipal pressurized irrigation system may be scheduled to occur on alternate days by order of the city or its agent. If an order is instituted, homes with a street address ending with an odd number shall irrigate on odd numbered days and homes with a street address with an even number shall irrigate on even numbered days.

7-8-10(G) Wanton wasting of irrigation water or use of irrigation water in a manner to cause damage or nuisance to adjoining properties is prohibited. The city or its agent may disconnect any service which wastes, causes damage to adjacent property or creates a nuisance through its use of irrigation water from the city system.

State Statute

42-607. DISTRIBUTION OF WATER. It shall be the duty of said water-master to distribute the waters of the public stream, streams or water supply, comprising a water district, among the several ditches taking water therefrom according to the prior rights of each respectively, in whole or in part, and to shut and fasten, or cause to be shut or fastened, under the direction of the department of water resources, the head-gates of the ditches or other facilities for diversion of water from such stream, streams or water supply, when in times of scarcity of water it is necessary so to do in order to supply the prior rights of others in such stream or water supply; provided, that any person or corporation claiming the right to the use of the waters of the stream or water supply comprising a water district, but not owning or having the use of an adjudicated or decreed right therein, or right therein evidenced by permit or license issued by the department of water resources, shall, for the purposes of distribution during the scarcity of water, be held to have a right subsequent to any adjudicated, decreed, permit, or licensed right in such stream or water supply, and the water-master shall close all head-gates of ditches or other diversions having no adjudicated, decreed, permit or licensed right if necessary to supply adjudicated, decreed, permit or licensed right in such stream or water supply. So long as a duly elected water-master is charged with the administration of the waters within a water district, no water user within such district can adversely possess the right of any other water user.

Helpful Links

2021 Gravity Irrigation Odd Delivery Schedule (PDF)

2020 Gravity Irrigation Delivery Schedule (PDF)

Idaho Legislature Title 42 - Irrigation Water (LINK)

Idaho Legislature Title 50 - Chapter 18 - City Irrigation Systems (LINK)

Bureau of Reclamation Reservoir Storage (LINK)

Idaho SNOTEL Current Snow Water Equivalent (LINK)