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Chambers-Clover Monitoring

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WA11D - Groundwater Monitoring Network, Chambers-Clover Creek Watershed, Pierce County, Washington

Problem - In May 2006 the U.S. Geological Survey (USGS) Washington Water Science Center (WAWSC), in cooperation with Pierce Conservation District (PCD) and the Washington State Department of Ecology began a project to characterize the groundwater flow system in the Chambers-Clover Creek Watershed (CCCW), including the establishment and operation of a 137-well monthly (March 2007-September 2008) groundwater monitoring network (Justin and others, 2009; Savoca and others, 2010). This and other information were integrated into a numerical groundwater-flow model of the CCCW that is currently under development. In 2009, PCD and local stakeholders requested WAWSC participation in the re-activation of selected wells in the CCCW monthly groundwater monitoring network to extent the period of record through 2014 and provide additional data for future refinement of the transient model.

Objectives - The objective of this study is the re-activation of monthly groundwater-level measurements at 29 wells located on Joint Base Lewis-McChord, a Department of Defense facility in the CCCW. These wells will be measured by WAWSC personnel. Earlier this year (2010) the WAWSC provided PCD and local stake holder staff with: 1) guidance on monitoring well selection; 2) field methods training; and 3) QA/QC and data archiving training, to enable PCD and local stakeholders to measure water levels at 50 re-activated residential monitoring wells in the study area. Of the 137 original monitoring wells, a total of 79 wells have been re-activated and will be measured monthly during the study period (2010-2014) by WAWSC, PCD, and local stakeholders.

Relevance and Benefits - This study is consistent with the national USGS mission and goals and with water-resource issues identified in the Center's Science Plan. The study addresses ground-water availability and sustainability, and surface-water and ground-water interactions as related to water-resource management, which are priority issues for both the Strategic Directions of the Water Resources Division 1999-2008 and the USGS Washington Water Science Center's Science Plan. This study also will provide resource managers on Chambers-Clover Monitoring with a numerical flow model to assist in the development of a long-term watershed management plan to meet the needs of current and future water demands within the watershed, while also working to protect and improve its natural resources. This study is appropriate for inclusion in the USGS Cooperative Program because it will provide information that advances understanding of hydrologic processes.

Approach - WAWSC personnel will conduct monthly groundwater-level measurements at 29 wells located on Department of Defense facilities within the CCCW. Groundwater-level measurements and associated information will be verified and entered into the National Water Information System data base.

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