20240215 14082700 1.0 TRUE SkagitCountyBigLakeWaterMitigationProgramWebMap Map Title: Big Lake Water Association Domestic Water Mitigation Program BoundaryAbstract: 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. 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.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 “Hydrogeologic Framework, Groundwater Movement, and Water Budget in Tributary SubBasins and Vicinity, Lower Skagit River Basin, Skagit and Snohomish Counties, WA USGS Scientific Investigations Report 2009-5270” and partly on Ecology’s assessment of groundwater occurrence, elevations, and flow directions based on well log data.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.Accuracy: 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’s 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’s 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. Publisher: Washington Department of Ecology Water Resources Program. Point of Contact: 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 – Fri 8:00am-5:00pmStatus: CompleteMaintenance and Update Frequency: Irregular Update Cycle: As NeededContact Information: 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: <a href='mailto:gis@co.skagit.wa.us' rel='nofollow ugc' style='color:rgb(0, 97, 155); text-decoration-line:none; font-family:inherit;'>gis@co.skagit.wa.us</a>Problems? Please report any map issues to Skagit County Geographic Information Services: 1700 East College Way Mount Vernon, WA 98273 (360) 416-1168 email: <a href='mailto:gis@co.skagit.wa.us' rel='nofollow ugc' style='color:rgb(0, 97, 155); text-decoration-line:none; font-family:inherit;'>gis@co.skagit.wa.us</a><img alt='Skagit County' src='https://skagitcounty.maps.arcgis.com/sharing/rest/content/items/5cc7eaf86400420f83b817bfacd9b041/data' style='max-width:100%; height:auto;' /> <a href='https://www.skagitcounty.net/' rel='nofollow ugc' style='color:rgb(0, 97, 155); text-decoration-line:none; font-family:inherit;' target='_blank'>Skagit County</a> <a href='https://www.skagitcounty.net/common/asp/default.asp?d=Home&c=General&p=draftTermsandConditions.htm' rel='nofollow ugc' style='color:rgb(0, 97, 155); text-decoration-line:none; font-family:inherit;' target='_blank'>Skagit County Terms and Use</a> SkagitCountyBigLakeWaterMitigationProgramWebMap MapServer Water Water Bank Hydrology Building Permits Hydrogeology Ecology Skagit Skagit County Nookachamps Big Lake Instream Flow Rules Skagit Instream Flow Rule Swinomish Tribal Community v. Ecology WAC 173-503 Permit Exempt Wells This layer is intended to be used by State and County employees and private individuals as part of a water use mitigation program for an area downstream of the north end of Big Lake, Skagit County. - Zoom in for property information. Washington Department of Ecology Water Resources Program - Skagit County GIS <p style='margin:0in 0in 0.0001pt; font-family:"Avenir Next W01", "Avenir Next W00", "Avenir Next", Avenir, "Helvetica Neue", sans-serif; font-size:16px; text-align:justify; background-image:initial; background-position:initial; background-size:initial; background-repeat:initial; background-attachment:initial; background-origin:initial; background-clip:initial;'>Accuracy Warning:<p style='margin:0in 0in 0.0001pt; font-family:"Avenir Next W01", "Avenir Next W00", "Avenir Next", Avenir, "Helvetica Neue", sans-serif; font-size:16px; text-align:justify; background-image:initial; background-position:initial; background-size:initial; background-repeat:initial; background-attachment:initial; background-origin:initial; background-clip:initial;'>Skagit County maps and data are created from public records and existing data sources. Records and data have been adjusted to achieve a "best fit" registration to create Skagit County maps. While great care is taken in this process, records and data from different sources rarely agree as to the precise location of geographic features. The relative positioning of map and data features to one another results from combining different sources without ground truthing. Maps and data are approximate and are not designed to be accurate to surveying or engineering standards. Spatial accuracy errors do exist as a result.<p style='margin:0in 0in 0.0001pt; font-family:"Avenir Next W01", "Avenir Next W00", "Avenir Next", Avenir, "Helvetica Neue", sans-serif; font-size:16px; text-align:justify; background-image:initial; background-position:initial; background-size:initial; background-repeat:initial; background-attachment:initial; background-origin:initial; background-clip:initial;'> <p style='margin:0in 0in 0.0001pt; font-family:"Avenir Next W01", "Avenir Next W00", "Avenir Next", Avenir, "Helvetica Neue", sans-serif; font-size:16px; text-align:justify; background-image:initial; background-position:initial; background-size:initial; background-repeat:initial; background-attachment:initial; background-origin:initial; background-clip:initial;'>Maps and data are for informational purposes only. They do not purport to represent a property boundary survey of any parcels shown and shall not be used for conveyances or the establishment of property.<p style='margin:0in 0in 0.0001pt; font-family:"Avenir Next W01", "Avenir Next W00", "Avenir Next", Avenir, "Helvetica Neue", sans-serif; font-size:16px; text-align:justify; background-image:initial; background-position:initial; background-size:initial; background-repeat:initial; background-attachment:initial; background-origin:initial; background-clip:initial;'> <p style='margin:0in 0in 0.0001pt; font-family:"Avenir Next W01", "Avenir Next W00", "Avenir Next", Avenir, "Helvetica Neue", sans-serif; font-size:16px; text-align:justify; background-image:initial; background-position:initial; background-size:initial; background-repeat:initial; background-attachment:initial; background-origin:initial; background-clip:initial;'>Maps and data shall be used as a resource only, and any such use of these products with respect to accuracy and precision shall be the sole responsibility of the user.<p style='margin:0in 0in 0.0001pt; font-family:"Avenir Next W01", "Avenir Next W00", "Avenir Next", Avenir, "Helvetica Neue", sans-serif; font-size:16px; text-align:justify; background-image:initial; background-position:initial; background-size:initial; background-repeat:initial; background-attachment:initial; background-origin:initial; background-clip:initial;'> <p style='margin:0in 0in 0.0001pt; font-family:"Avenir Next W01", "Avenir Next W00", "Avenir Next", Avenir, "Helvetica Neue", sans-serif; font-size:16px; text-align:justify; background-image:initial; background-position:initial; background-size:initial; background-repeat:initial; background-attachment:initial; background-origin:initial; background-clip:initial;'><a href='https://www.skagitcounty.net/Departments/Home/draftTermsandConditions.htm#Maps' rel='nofollow ugc' style='color:rgb(0, 97, 155); text-decoration-line:none;' target='_blank'>Skagit County Terms and 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