20201221 18452400 1.0 FALSE MineralResourceLands 966066.499927 1210547.592329 525946.317976 665814.910286 1 Projected GCS_North_American_1983 Linear Unit: Foot_US (0.304801) NAD_1983_StatePlane_Washington_South_FIPS_4602_Feet <ProjectedCoordinateSystem xsi:type='typens:ProjectedCoordinateSystem' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xmlns:xs='http://www.w3.org/2001/XMLSchema' xmlns:typens='http://www.esri.com/schemas/ArcGIS/10.8'><WKT>PROJCS[&quot;NAD_1983_StatePlane_Washington_South_FIPS_4602_Feet&quot;,GEOGCS[&quot;GCS_North_American_1983&quot;,DATUM[&quot;D_North_American_1983&quot;,SPHEROID[&quot;GRS_1980&quot;,6378137.0,298.257222101]],PRIMEM[&quot;Greenwich&quot;,0.0],UNIT[&quot;Degree&quot;,0.0174532925199433]],PROJECTION[&quot;Lambert_Conformal_Conic&quot;],PARAMETER[&quot;False_Easting&quot;,1640416.666666667],PARAMETER[&quot;False_Northing&quot;,0.0],PARAMETER[&quot;Central_Meridian&quot;,-120.5],PARAMETER[&quot;Standard_Parallel_1&quot;,45.83333333333334],PARAMETER[&quot;Standard_Parallel_2&quot;,47.33333333333334],PARAMETER[&quot;Latitude_Of_Origin&quot;,45.33333333333334],UNIT[&quot;Foot_US&quot;,0.3048006096012192]],VERTCS[&quot;NAVD_1988&quot;,VDATUM[&quot;North_American_Vertical_Datum_1988&quot;],PARAMETER[&quot;Vertical_Shift&quot;,0.0],PARAMETER[&quot;Direction&quot;,1.0],UNIT[&quot;Foot_US&quot;,0.3048006096012192]]</WKT><XOrigin>-117498300</XOrigin><YOrigin>-98850300</YOrigin><XYScale>3048.0060960121914</XYScale><ZOrigin>0</ZOrigin><ZScale>1</ZScale><MOrigin>0</MOrigin><MScale>1</MScale><XYTolerance>0.0032808333333333335</XYTolerance><ZTolerance>0.001</ZTolerance><MTolerance>0.001</MTolerance><HighPrecision>true</HighPrecision><WKID>102749</WKID><LatestWKID>2286</LatestWKID></ProjectedCoordinateSystem> 20230915 10475700 20230915 10475700 FGDC Thurston Geodata Center 360-754-4594 2000 Lakeridge Dr SW Olympia WA 98502 geodata@co.thurston.wa.us M-F 9am to 1pm 20251219 ArcGIS Metadata 1.0 sdeEnterpriseSrc.DBO.MineralResourceLands 2020-12-22 Thurston County Community Planning and Economic Development Thurston Geodata Center 2000 Lakeridge Dr SW, Olympia, WA, 98502 vector digital data Last updated on 12/19/2025 by WE.This data shows the designated mineral resource lands in Thurston County. This dataset is based on underlying geology and other factors that may support the commercial extraction of minerals. The basis of analysis was WADNR's 24 and 100K geology data that was adjusted to Thurston County 2011 LiDAR. Thurston County contracted Associated Earth Science,Inc.(AESI) to identify and classify mineral resources in the County and create a base inventory map showing the location of mineral resources. Resource classification (for example, A1, B3, etc.) for sand and gravel (aggregate) and quarry rock was made based on quality, quantity and other information derived from Thurston County, Washington State and Federal sources.Sand and Gravel(Aggregate)Resource Stratadecreasing resource qualityNon-ResourceQuality Type AQuality Type BQuality Type CQuality Type DDecreasing resource thickness and volumeQuantity Type 1•&lt;5 percent fines•70:30 to 30:70 sand and gravel ratio•&gt;25 years’ life expectancy•Minimum 240,000yd3/acre•&gt;100 feet thick•Minimum overburden•Up to 15 percent fines•70:30 to 30:70 sand and gravel ratio•&gt;25 years’life expectancy•Minimum 240,000 yd3/acre•&gt;100 feet thick•Minimum overburden•Up to 25 percent fines•70:30 to 30:70 sand and gravel ratio•&gt;25 years’ life expectancy•Minimum 240,000yd3/acre•&gt;100 feet thick•Minimum overburden•Generally unsuitable for extraction •&gt;25 percent fines, may have high organic content•Out of 70:30 to 30:70 sand and gravel range•No life expectancy•&lt;15,000 yd3/acre•Limited depthQuantity Type 2•&lt;5 percent fines•70:30 to 30:70 sand and gravel ratio•10 to 25 years’ life expectancy•Average 80,000 to 240,000 yd3/acre•50 to I00 feet thick•Overburden &lt;15 feet thick•Up to 15 percent fines•70:30 to 30:70 sand and gravel ratio•10 to 25 years’ life expectancy•Average 80,000 to 240,000 yd3/acre•50 to 100 feet thick•Overburden &lt;15feet thick•Up to 25 percent fines•70:30 to 30:70 sand and gravel ratio•10 to 25 years’ life expectancy•Average 80,000 to 240,000 yd3/acre•50 to 100 feet thick•Overburden &lt;15 feet thickQuantity Type 3•&lt;5 percent fines•70:30 to 30:70 sand and gravel ratioLife expectancy variable, generally &lt;10 years•Average 15,000 to 80,000 yd3/acre•Thickness varies, typically &lt;50 feet•Up to 15 percent fines•70:30 to 30:70 sand and gravel ratio•Life expectancy variable, generally &lt;10 years•Average 15,000 to •80,000 yd3/acre•Thickness varies, typically &lt;50feet•Up to 25 percent fines•70:30 to 30:70 sand and gravel ratio•Life expectancy variable, generally &lt;10 years•Average 15,000 to 80,000 yd3/ acre•Thickness varies, typically&lt;50 feetQuarry Rock (Bedrock) Quality Type AQuality Type BQuality Type CQuality Type DDecreasing interbedded resource strataType 1• Formation generally well mapped and (or) high percentage of formation contains resource strata of type AMeets or exceeds WSDOT specs for all rock products• Minimal amount of fractures•Minimal percent waste rock•20 percent or more rockery- size material produced•Formation mostly divided locally and contains a high percentage of resource strata of type B•Meets WSDOT specs for some rock products•Fractures vary from minor to very prevalent•Up to 10 percent waste rock• 20 percent or less rockery-size material produced•Formation mostly divided locally and contains a high percentage of resource strata of type C•Rock will not meet WSDOT specs•Highly fractured•10 to 30 percent waste rock•Minimal rockery-size material produced•Generally unsuitable for extraction•&gt;30 percent waste rock•Highly to very highly fractured and (or) weathered and (or) poorly lithified•No rockery-size material producedType 2None•Formation undividedand &gt;50% of formation contains mostly resource strata of type B as defined for Type 1 bedrock•Formation undividedand &gt;50% of formation contains mostly resource strata of type C as defined for Type 1 bedrockType 3•Formation undividedand &lt;50% formation contains mostly resource strata of type B as defined for Type 1•Formation undividedand &lt;50% of formation contains mostly resource strata of type C as defined for Type 1The mineral resource inventory was adopted on November 12, 2019 with Resolution 15836 as Map N-3.The mineral resource inventory was then used as a basis to create the mineral resource lands designation. Designated mineral resource lands were determined through evaluation of the mineral resource inventory data based on location and parcel size considerations. Areas were added or removed from the inventory based on the guidance from the Thurston County Board of County Commissioners, Planning Commission, and input from the public. These included: Proximity to public preserves, parks, national wildlife refuges, state conservation areasProximity to Cities, Urban Growth Areas, and Federal or Tribal LandsLocations of transportation rights of wayLocations of Thurston County historic sitesLocations of previously designated and current permitted mining locationsParcel size threshold of a minimum of 5 acres in sizeParcel adjacency where more than 40% of the surrounding parcels are less than 5 acres in sizeInformation regarding the analysis processes is included in the Metadata Lineage and in documentation stored by the Thurston County Community Planning and Economic Development. This dataset shows the designated mineral resource lands in Thurston County. This layer was created to meet the minimum Growth Management Act requirements (RCW 36.70A). The designation of Mineral Resource Lands was included as part of the Comprehensive Plan update completed in 2020. This dataset was created using an inventory of mineral resource lands based on underlying geology, that was developed by Associated Earth Science Inc (AESI), and other factors that may support the commercial extraction of minerals. Areas were removed from the inventory based on the further guidance from the Thurston County Board of County Commissioners, Planning Commission, and input from the public. This layer was adopted with Resolution 15953 on December 15, 2020. This layer will be reviewed and updated periodically, consistent with GMA requirements. Thurston County Community Planning and Economic Development, Thurston County GeoData Thurston County Community Planning and Economic Development 360-786-5490 2000 Lakeridge Dr SW Olympia WA 98502 Thurston Geodata Center 360-754-4594 2000 Lakeridge Dr SW Olympia WA 98502 geodata@co.thurston.wa.us M-F 9am to 1pm environment ISO 19115 Topic Categories Planning Natural Resource Mines Mineral Lands Thurston County environment Planning Natural Resource Mines Mineral Lands Thurston County By accessing any Data or Maps(“Data”) posted by Thurston County, you agree to these Terms of Use (“Terms”). These terms may be updated or modified by Thurston County at any time at its sole discretion. If you do not agree to these Terms, do not access the Data or download any material from it.Thurston County grants you alimited, revocable license to use, reproduce and redistribute the Data in accordance with these Terms. 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By downloading this data the user agrees to the Thurston County GeoData Download Portal Terms of Use and want to access the Data. Version 6.2 (Build 9200) ; Esri ArcGIS 10.8.1.14362 true -123.209599 -122.215432 47.146200 46.744061 Adopted on December 15, 2020 by Thurston County Board of County Commissioners 2020-12-15 Added designated mines locations at time of analysis. • The Thurston County Mines layer was used to show all known mines in Thurston County at the time of adoption. Additional mine locations were added using the Washington State Department of Natural Resources (WADNR) Permitted Mines data obtained on 9/26/2017. The WADNR mine locations are approximate. • Locations of existing Thurston County Designated Mineral Lands were added to the previously modified Mineral Inventory layer. 2020-10-19 Removed parcels 5 acres or larger in size when more than 40% of the surrounding parcels are less than 5 acres in size. • The Thurston County Assessor’s Parcel layer was dissolved on parcel number and Assessor’s Total Acres field. Parcels with five or more acres in the TOTAL_ACRES field or were previously identified as discrepancy parcels were selected and exported. • A layer was created of ROW adjacent to less than five-acre parcels, along with less than five-acre parcels. To incorporate parcels adjacent to parcels less than 5 acres in size that are separated by Right of Way, the ROW layer was manually classified, based upon adjacency, to parcels less than 5 acres. This assumed that all other adjacency was five acres, or greater. The created ROW layer was merged with parcels less than 5 acres in size and dissolved to calculate less than 5 acre perimeter length around five acre or greater parcels. Less than 5 acre perimeter length was divided by total perimeter length for each 5 acre or greater parcel to generate percent of perimeter adjacent to less than 5 acre parcels. • Five acre or greater parcels with more than 40% of their perimeter adjacent to less than 5 acre parcels were removed from the previously modified Mineral Inventory layer. 2020-10-19 Removed Urban Growth Areas (UGAs) and areas within 1,000 feet of UGAs from Mineral Lands Inventory data layer. 2020-10-19 Removed right of ways (ROW) representations. • Right of Ways layer was created by identifying gaps within the Thurston County Parcels layer by Erasing between the Parcels layer from the Thurston County County Border layers. Additional parcels with ROW attribute identifiers were selected and appended to the previously created layer. The right of ways layer was removed from the previously modified Mineral Inventory layer. 2020-10-19 Removed public preserves, parks, national wildlife refuges, state conservation areas and areas within 1000 feet of identified parks. • The Thurston County Geodata Parks layer was utilized to select thirty-eight (38) locations that were 5 acres or larger and are that are government owned, including parks, public preserves, natural areas, and undeveloped lands for Thurston County, local cities, state, and federal ownership. The following were not included in the Parks layer: non-government parks, parks less than 5 acres, trailhead parcels, county-owned boat launches, county-owned trails, the off-road vehicle park, and the Evergreen State College. The parks were identified as determined by a majority of the Board of County Commissioners on November 20, 2018. Future parks added to the Thurston County Parks layer that meet these criteria will be removed from MRL designation, but these parks will not have the 1000 foot separation buffer. • The selected parks and areas within 1000 feet of the identified parks were removed from the previously modified Mineral Inventory layer. 2020-10-19 Removed parcels smaller than 5 acres in size. • The Thurston County Assessor’s Parcels layer was dissolved on parcel number and Assessor’s Total Acres field. Discrepancies between the Assessor’s Total Acres value and GIS calculated acreage of a dissolved parcel were determined. Parcels that had Total Acres values less than 5 acres but had significant differences between the Total Acres and calculated acres values were reclassified as being larger than 5 acres. • Parcels with less than five acres in the TOTAL_ACRES field were selected and exported. The exported parcel layer was removed from the previously modified Mineral Inventory layer. 2020-10-19 Removed parcels containing historic sites. • The dissolved Thurston County Geodata Parcels layer was intersected with the Thurston County Geodata Historic Sites layer. The selected parcels containing historic sites were removed from the previously modified Mineral Inventory layer. 2020-10-19 This layer was updated to reflect the removal of an area overlapping with the expanded Grand Mound Urban Growth Area following the adoption of the Thurston 2045 Comprehensive Plan periodic update by the Board of County Commissioners on 12/16/2025. 2025-12-19 Thurston Geodata Center 360-754-4594 2000 Lakeridge Dr SW Olympia WA 98502 geodata@co.thurston.wa.us M-F 9am to 1pm 298 sdeEnterpriseSrc.DBO.MineralResourceLands Shape Feature geometry. Esri Coordinates defining the features. ClassificationCode Informs the resource type from Mineral Lands Inventory data (AESI). Resource Type A is generally a better resource than Type C. The number (1, 2, 3) references decreasing thickness. AESI AgLands Indicates if the area overlays Agricultural Lands of Long-Term Commercial Significance where Zoning is either Long-Term Agriculture or Nisqually Agriculture. Yes = (1), No = (0) Thurston County GeoData CREATOR_NAME Data creator name (automated) Thurston County GeoData GeologicUnitCode Geologic unit abbreviations that signify the units' age, depositional setting, rock type, and formal or informal name. Washington State Department of Natural Resources Division of Geology and Earth Resources (DGER) ChangeDescription Description of change to layer after original layer adoption on 12/15/2020 Thurston County GeoData EDIT_DATE Last date edited (automated) Thurston County GeoData ResolutionNumber Resolution number associated with mineral resource lands designation change. Thurston County GeoData MineralLandType Determination of mineral land type as either Bedrock (Quarry) or Sand and-or gravel (aggregate). Data was derived from the Aggregate = "yes" or the Quarry = "yes" fields provided in Mineral Inventory data delivered by AESI. Thurston County GeoData EDITOR_NAME Last data editor name (automated) Thurston County GeoData Notes Information about the layer sources and notes prior to layer adoption. Thurston County GeoData CREATE_DATE Date created (automated) Thurston County GeoData OBJECTID Internal feature number. Esri Sequential unique whole numbers that are automatically generated. DataSource Informs the source of the data. Thurston County GeoData GlobalID Shape.STArea() Shape.STLength()