The Bainbridge Island groundwater system modeling project is complete! The technical report on the model and the results of the first model scenarios are available from the
USGS Site.
Groundwater is the sole source of drinking water on Bainbridge Island, therefore, it’s imperative to have a thorough understanding of the Island’s complex aquifer system through scientific study and long-term monitoring. This is essential in making any planning decisions that may impact groundwater availability and sustainability. In 2007 the City and the U.S. Geological Survey (USGS) Washington Water Science Center began a joint venture to create a numerical groundwater model of the Bainbridge Island aquifer system.
The Water Purveyor’s Association of Kitsap (WaterPAK) have already entered a similar joint funding agreement with the USGS Washington Water Science Center for a similar study encompassing all of the Kitsap public water utility boundaries. This effort will incorporate Bainbridge Island and, at no cost to the City, further define the connection our deep aquifers share with the Kitsap Peninsula and incorporate an additional three or more years worth of new data.
This project represents a significant commitment by the City Council on behalf of our citizens who, in the 2004 Comprehensive Plan, designated the protection of the Island’s water resources as their #3 goal and #2 overriding principle that guides the plan. This also represents a considerable and exemplary effort by City staff, past and present, from both the Public Works Department and the Planning and Community Development Department.
In 2006, the City contracted to conduct a technical review and
baseline summary of groundwater data from the City water utility, KPUD, Washington State Department of Health, Kitsap Public Health District, and the WRIA 15 water quality assessment. This effort established a long-term
groundwater monitoring program, created a
sampling and analysis plan, and provided periodic data review and program updates. The groundwater model is a critical first element of the City's Groundwater Management Program.
At present, the City collects monthly water level data and annual chloride measurements. Water level data is used to help assess the quantity of water in different aquifers. Chloride data is an indicator of seawater intrusion which occurs when saltwater intrudes into fresh water supplies.
