Waimanalo Irrigation System Water Level

CURRENT WATER LEVEL AS OF:   2/17/2017   61.25 feet (57.62 MG)

Previous water levels:

  • 2/16/2017   61.25 feet (57.62 MG)
  • 2/15/2017   61.25 feet (57.62 MG)
  • 2/14/2017   61.25 feet (57.62 MG)
  • 2/13/2017   61.25 feet (57.62 MG)
  • 2/10/2017   60.50 feet (56.23 MG)
  • 2/9/2017   60.50 feet (56.23 MG)
  • 2/8/2017   60.50 feet (56.23 MG)
  • 2/7/2017   60.50 feet (56.23 MG)
  • 2/6/2017   60.50 feet (56.23 MG)


TO:         All Irrigation System Customers

FROM:   Brian Kau, P.E,
Administrator and Chief Engineer
Agricultural Resource Management Division

SUBJECT: Summer and Fall 2016 Forecast

The National Weather Service is predicting a continuing trend for development of La Nina conditions around the state.  Traditionally La Nina conditions were favorable for a wetter than normal wet season (October – April).  However, recent La Nina events have not necessarily followed that pattern.  Recent La Nina events (since roughly the 1990s) have been trending toward drier wet seasons with fewer cold fronts and Kona lows. Therefore, the forecast for the 2016 summer and fall has a high degree of uncertainty at this time.  Leeward sides of the islands may experience drier than normal conditions while windward sides may experience slightly wetter conditions.

Although reservoir levels are currently high, a prolonged dry spell can quickly bring the levels down.  Therefore, the Department of Agriculture strongly suggests that all irrigation system customers consider this information when planting for this summer and fall, keeping in mind that irrigation water service may be affected should conservation measures be necessary.

Should you have any questions, please feel free to call 973-9473.

* * * * * * * * * * * * * * *

Upon notification by the Waimanalo Irrigation System, the following restrictions will be implemented in phases as the reservoir levels approach pre-determined levels.  However, implementation of a specific conservation phase is approximate and may be put into effect based on factors such as a significant increase in system-wide consumption or upcoming weather conditions.

PHASE I –  Cautionary Low – Voluntary Water Conservation – 10%

  • Distribution days will be Sundays to Saturdays – 24 hours a day
  • Voluntary reduction of water consumption by 10% is requested.

PHASE I – MODIFIED – Mandatory Water Conservation – 10%

  • Distribution days will be Mondays to Fridays only, no weekends
  • Distribution hours will be 24 hours a day
  • Mandatory reduction of water consumption by 10%.

PHASE II – (±27 ft.)   Mandatory Water Conservation – 20%

  • Distribution days will be Mondays to Fridays
  • Distribution hours will be from 7:30 a.m. to 3:30 p.m.
  • Mandatory reduction of water consumption by 20%

PHASE III – (±20 ft.) Critical Low – Mandatory Water Conservation

  • Distribution days will be Mondays, Wednesdays and Fridays.
  • Distribution hours will be from 7:30 a.m. to 3:30 p.m.

Please contact us at 973-9473, if you have any questions.