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 "description": "Last updated on 12/24/2020 by ERP.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\u2022<5 percent fines\u202270:30 to 30:70 sand and gravel ratio\u2022>25 years\u2019 life expectancy\u2022Minimum 240,000yd3/acre\u2022>100 feet thick\u2022Minimum overburden\u2022Up to 15 percent fines\u202270:30 to 30:70 sand and gravel ratio\u2022>25 years\u2019 life expectancy\u2022Minimum 240,000 yd3/acre\u2022>100 feet thick\u2022Minimum overburden\u2022Up to 25 percent fines\u202270:30 to 30:70 sand and gravel ratio\u2022>25 years\u2019 life expectancy\u2022Minimum 240,000yd3/acre\u2022>100 feet thick\u2022Minimum overburden\u2022Generally unsuitable for extraction \u2022>25 percent fines, may have high organic content\u2022Out of 70:30 to 30:70 sand and gravel range\u2022No life expectancy\u2022<15,000 yd3/acre\u2022Limited depthQuantity Type 2\u2022<5 percent fines\u202270:30 to 30:70 sand and gravel ratio\u202210 to 25 years\u2019 life expectancy\u2022Average 80,000 to 240,000 yd3/acre\u202250 to I00 feet thick\u2022Overburden <15 feet thick\u2022Up to 15 percent fines\u202270:30 to 30:70 sand and gravel ratio\u202210 to 25 years\u2019 life expectancy\u2022Average 80,000 to 240,000 yd3/acre\u202250 to 100 feet thick\u2022Overburden <15feet thick\u2022Up to 25 percent fines\u202270:30 to 30:70 sand and gravel ratio\u202210 to 25 years\u2019 life expectancy\u2022Average 80,000 to 240,000 yd3/acre\u202250 to 100 feet thick\u2022Overburden <15 feet thickQuantity Type 3\u2022<5 percent fines\u202270:30 to 30:70 sand and gravel ratioLife expectancy variable, generally <10 years\u2022Average 15,000 to 80,000 yd3/acre\u2022Thickness varies, typically <50 feet\u2022Up to 15 percent fines\u202270:30 to 30:70 sand and gravel ratio\u2022Life expectancy variable, generally <10 years\u2022Average 15,000 to \u202280,000 yd3/acre\u2022Thickness varies, typically <50feet\u2022Up to 25 percent fines\u202270:30 to 30:70 sand and gravel ratio\u2022Life expectancy variable, generally <10 years\u2022Average 15,000 to 80,000 yd3/ acre\u2022Thickness varies, typically<50 feetQuarry Rock (Bedrock) Quality Type AQuality Type BQuality Type CQuality Type DDecreasing interbedded resource strataType 1\u2022 Formation generally well mapped and (or) high percentage of formation contains resource strata of type AMeets or exceeds WSDOT specs for all rock products\u2022 Minimal amount of fractures\u2022Minimal percent waste rock\u202220 percent or more rockery- size material produced\u2022Formation mostly divided locally and contains a high percentage of resource strata of type B\u2022Meets WSDOT specs for some rock products\u2022Fractures vary from minor to very prevalent\u2022Up to 10 percent waste rock\u2022 20 percent or less rockery-size material produced\u2022Formation mostly divided locally and contains a high percentage of resource strata of type C\u2022Rock will not meet WSDOT specs\u2022Highly fractured\u202210 to 30 percent waste rock\u2022Minimal rockery-size material produced\u2022Generally unsuitable for extraction\u2022>30 percent waste rock\u2022Highly to very highly fractured and (or) weathered and (or) poorly lithified\u2022No rockery-size material producedType 2None\u2022Formation undividedand >50% of formation contains mostly resource strata of type B as defined for Type 1 bedrock\u2022Formation undividedand >50% of formation contains mostly resource strata of type C as defined for Type 1 bedrockType 3\u2022Formation undividedand <50% formation contains mostly resource strata of type B as defined for Type 1\u2022Formation undividedand <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.",
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 "title": "Mineral Resource Lands",
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 "accessInformation": "Thurston County Community Planning and Economic Development, Thurston County GeoData",
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