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Map Title: <\/b>Big Lake Water Association Domestic Water Mitigation Program Boundary<\/span><\/span><\/p>

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Abstract: <\/b>This boundary was created using ESRI ArcGIS for the purpose of delineating an area where current and future property owners can acquire mitigation credits to offset consumptive use of water that was ruled in violation of the Skagit Instream Flow Rule by the WA State Supreme Court in 2013.  <\/span>In 2013 the Department of Ecology acquired three water rights from the former Big Lake Water Association and placed them in trust for the use of stream flow augmentation and mitigation purposes. These three water rights are senior in right to the Skagit Instream Flow Rule and therefore are not subject to interruption when regulated flows are not being met.<\/p>

The boundary is based on a groundwater assessment in the Nookachamps Creek sub basin downstream of the former Big Lake Water Association well field. This groundwater assessment was based in part on the United States Geologic Survey findings in \u201cHydrogeologic Framework, Groundwater<\/span> Movement, and Water Budget in Tributary SubBasins and Vicinity, Lower Skagit River Basin, Skagit and Snohomish Counties, WA USGS Scientific<\/span> Investigations Report 2009-5270<\/span>\u201d and partly on Ecology\u2019s assessment of groundwater occurrence, elevations, and flow directions based on well log data.<\/p>

The western extent of this mitigation boundary was set to the city limits of Mount Vernon. The eastern extent was set to the designated boundary between the Nookachamps Creek sub basin and the East Fork Nookachamps sub basin.<\/p>

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Accuracy: <\/b>The completeness of the data reflects the content of the sources which is the published USGS 2009 Hydrogeologic Framework report mentioned in the description and Ecology\u2019s analysis of well logs in the vicinity. This information provides only generalized groundwater flow directions and should not be relied upon for detailed groundwater characteristics at any one location within the designated area. This analysis cannot ensure the uniformity of data gathering techniques and the resulting interpretation of the data, since well log data was collected by individual drillers. This includes the assumption that water level data taken at the time of well construction actually represent static water levels. Furthermore, averaged monthly USGS water elevation data was used alongside the one-time well log data collected by Ecology. These averaged data points may not represent a good correlation with synoptic or one-time water measurements. However, groundwater flow directions were drawn between data points gathered from same source if possible to offset this potential problem. Finally Ecology\u2019s use of one-time water depth measurements from across a decade introduces the potential problem of seasonal and long-term groundwater fluctuations which might skew the data. However, the fact that groundwater elevations (and associated flow directions) seem to reasonably match the conceptual expectation that relatively shallow groundwater flow directions follow surface topography indicates this is not a meaningful potential error. <\/span><\/p><\/span><\/span>

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Publisher: <\/b>Washington Department of Ecology Water Resources Program.
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Point of Contact: <\/b>John Rose L.G. Hydrogeologist and GIS Analyst Washington Department of Ecology Water Resources Program Northwest Regional Office 3190 160th Ave SE Bellevue WA 98008, (425) 649-7000 Mon \u2013 Fri 8:00am-5:00pm<\/p>

Status: <\/span>Complete<\/p><\/span>Maintenance and Update Frequency: Irregular<\/span>

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Update Cycle:<\/b> As Needed<\/p>

Contact Information:<\/b>
For more information about this map, please contact the Skagit County GIS Department:
1700 East College Way
Mount Vernon, WA  98273
(360) 416-1168
email:  gis@co.skagit.wa.us<\/a><\/p>

Problems?<\/b>
Please report any map issues to Skagit County Geographic Information Services:
1700 East College Way
Mount Vernon, WA  98273
(360) 416-1168
email:  gis@co.skagit.wa.us<\/a><\/p>

Skagit County
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Skagit County<\/a>
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