THURSTON COUNTY COMPREHENSIVE PLAN UPDATE

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1 THURSTON COUNTY COMPREHENSIVE PLAN UPDATE BOARD OF COUNTY COMMISSIONERS WORK SESSION JUNE 14, 2017 Land Use Natural Resources Transportation Housing Utilities Environment Economic Development Capital Facilities Health Mineral Resource Lands

2 OVERVIEW Information Only Background: Natural Resources Chapter Update Mineral Resource Lands: Inventory & Classification Next Steps: Designation of Mineral Lands Land Use Natural Resources Transportation Housing Utilities Environment Economic Development Capital Facilities Health

3 THURSTON COUNTY COMPREHENSIVE PLAN UPDATE TIMELINE Jan Sept 2017 Internal & Technical Review Initial Public Outreach Community Meetings Sept 2017 Feb 2018 Planning Commission Review PC Public Hearing Jan Sept 2018 BoCC Review SEPA/EIS BoCC Public Hearing All dates are tentative and subject to change.

4 NATURAL RESOURCE LANDS Natural Resource Lands Forestry Agriculture Mining Fisheries GMA requires counties to identify, classify, designate, and conserve natural resource lands Prevent locating incompatible uses where they will interfere with the long-term survival of these industries The following goals are adopted to guide the development and adoption of comprehensive plans and development regulations: (8) Natural resource industries. Maintain and enhance natural resource-based industries, including productive timber, agricultural, and fisheries industries. Encourage the conservation of productive forestlands and productive agricultural lands, and discourage incompatible uses A.020 RCW

5 SCOPE OF WORK Natural Resource Element Update map of designated mineral resource lands Review policies for agricultural lands, limiting nonagricultural uses Review Long-Term Forestry designations* * Indicates optional item approved by BoCC in 2017/2018 budget.

6 MINERAL RESOURCE LANDS Mineral Lands = Areas where geology and other factors may support the commercial extraction of minerals (mining), including sand, gravel, rock, and metals. Inventory must be countywide Based on geology DNR, USGS, and relevant information provided by property owners Depth and Quality of the Resource Availability and Proximity to Market In designating mineral resource lands, counties and cities must approach the effort as a county-wide or regional process. Counties and cities should not review mineral resource lands designations solely on a parcel-by-parcel basis. Counties and cities classify mineral resource lands based on geologic, environmental, and economic factors, existing land uses, and land ownership WAC

7 MINERAL RESOURCE LANDS: TIMELINE 2003 County adopts interim mineral lands regulations; establishes a Mineral Lands Task Force Sept 2010 County adopts Resolution and Ordinance 14402, amending designation criteria Nov 2010 County regulations challenged to Growth Management Hearings Board (GMHB) Weyerhaeuser Co, et al. v. Thurston County Jun 2011, Jul 2012 GMHB issued orders for County to reconsider designation criteria County adopted changes to designation criteria Mar 2013 GMHB found County in compliance, with stipulation that designated mineral lands will be mapped in Comp Plan Update The failure to designate MRL, the prohibition of designation of MRL (Issue 17), the failure to apply the MRL designation criteria and amend the future land use map (FLUM) (Issue 15) are premature challenges. Those allegations would be appropriate following the County's completion of its comprehensive plan update. - Growth Management Hearings Board, 6/17/2011

8 MINERAL RESOURCE LANDS Project Steps for Mineral Resource Lands 1. Identify and classify Develop a countywide inventory based on geologic data on the location and extent of mineral deposits, existing land uses, and other factors. These areas are categorized based on their quality, using available data from DNR, USGS, and others 2. Designate Identify priority areas where high quality mineral resources are available and compatible with existing land use patterns and other criteria. 3. Conserve Establish policies that ensure future land uses will be compatible with mineral extraction in designated areas. Comp Plan Update 4. Permit New mining operations planned in areas designated as mineral resource lands will still need to be reviewed before they are permitted to operate. Mining activities must abide by all relevant state and local regulations, including environmental rules.

9 Thurston County Mineral Lands Project Planning Commission Meeting June 14, 2017 Joe Dragovich, L.G., L.E.G. Project Manager, Senior Geologist Associated Earth Sciences Inc.

10 Project Purpose Identify, classify and designate mineral resource lands of long term commercial significance in Thurston County

11 Thurston County Geology

12 Geologic Setting of Resources Three resource geo settings: (1) Glacial Outwash Vashon Recession (2) Glacial outwash Vashon Advance (3) Volcanic Bedrock Example (right) braided river deposits

13 Geologic Mapping of Thurston County Brief Geology Overview Aggregate and Rock! Volcanic bedrock formations noted VASHON CONTINENTAL GLACIATION

14 Aggregate Resource and Continental Glaciation (18 10ka)

15 North South Cartoon Cross Section Bedrock old volcanic uplands. Note the volcanic flow beds and the general scale. Vashon Advance outwash deposited during ice advance and under the till. Vashon Recessional outwash (our Qgo friend) deposited during ice recessional and IS THE MAIN RESOURCE. Qgo is typically thin!

16 Quaternary Glacial Outwash (unit Qgo)

17 Data Sources and Classification Table

18 Major Sources of Information for the Thurston County Mineral Resource Lands Project Data Source Thurston County (TC) geologic map compilation TC subsurface data compilation TC active mine dataset LidAR imagery Washington State Department of Natural Resource Division of Geology and Earth Resources (DGER) 24k and 100k geologic mapping of TC DGER subsurface database DGER mine database DGER Shelton quadrangle resource study DGER Pierce and Lewis County Resource studies Washington State Department of Transportation (DOT) active and inactive mine database DOT subsurface database DOT aggregate and rock quality database United State Geologic Survey (USGS) topographic maps USGS geohydrology study of Thurston County of Droost and others (1998, 1999) USGS geohydrology geology and geohydrology study of Thurston County of Walters and Kimmel (1966) Associated Earth Science Inc. (AESI) project information Miscellaneous Geologic Publications Notes TC GIS geologic map compilation and metadata derived from DGER information TC subsurface data (improved from USGS and other datasets) Used to update geologic mapping of resource areas particularly where only 1:100,00-scale geologic mapping exists. Covers all of TC 24k and 100k geologic mapping covers the TC Large dataset with wells, borings and geotechnical studies (some with sieve data). Information covers much of TC and includes DOE water well reports, geotechnical reports and other information Active and inactive permitted mine database including reclamation plans Covers the northwest corner of TC Adjacent resource studies consulted DOT mine information including reclamation plans, cross sections, drilling logs, Database of borings along major highways Aggregate and bedrock quality data (sieve, LA abrasion tests, etc...) 7.5-minute topographic maps of the TC with mine with pit, mine and quarry location information Variety of surface and subsurface information including subsurface data, cross sections, etc. covers most of the county Variety of surface and subsurface information including subsurface data, cross sections, etc. covers most of the county Provides additional surface and subsurface site specific information including resource quality and quantity information at various site across the county including sediment sieve analysis at several sites Examples include Lea (1984) and Globerman (1981) TC thesis studies

19 Major Sources of Information for the Thurston County Mineral Resource Lands Project

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21 Table 1. Thurston County Mineral Resource Lands Aggregate Quarry Rock Classification System DRAFT Sand and Gravel (Aggregate) Resource Strata decreasing resource quality Non Resource Decreasing resource thickness and volume Quantity Type 1 Quantity Type 2 Quantity Type 3 Quality Type A 1 Quality Type B 2 Quality Type C 3 Quality Type D 4 <5 percent fines 5 70:30 to 30:70 sand and gravel ratio >25 years life expectancy Minimum 240,000 yd 3 /acre >100 feet thick Minimum overburden <5 percent fines 70:30 to 30:70 sand and gravel ratio 10 to 25 years life expectancy Average 80,000 to 240,000 yd 3 /acre 50 to I00 feet thick Overburden <15 feet thick <5 percent fines 70:30 to 30:70 sand and gravel ratio Life expectancy variable, generally <10 years Average 15,000 to 80,000 yd 3 /acre Thickness varies, typically <50 feet Up to 15 percent fines 5 70:30 to 30:70 sand and gravel ratio >25 years life expectancy Minimum 240,000 yd 3 /acre >100 feet thick Minimum overburden 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 yd 3 /acre 50 to 100 feet thick Overburden <15 feet thick Up to 15 percent fines 70:30 to 30:70 sand and gravel ratio Life expectancy variable, generally <10 years Average 15,000 to 80,000 yd 3 /acre Thickness varies, typically <50 feet Up to 25percent fines 5 70:30 to 30:70 sand and gravel ratio >25 years life expectancy Minimum 240,000 yd 3 /acre >100 feet thick Minimum overburden 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 yd 3 /acre 50 to 100 feet thick Overburden <15 feet thick Up to 25 percent fines 70:30 to 30:70 sand and gravel ratio Life expectancy variable, generally <10 years Average 15,000 to 80,000 yd 3 / acre Thickness varies, typically <50 feet Generally unsuitable for extraction >25 percent fines 5, may have high organic content Out of 70:30 to 30:70 sand and gravel range No life expectancy <15,000 yd 3 /acre Limited depth Quarry Rock 6 (Bedrock) Decreasing interbedded resource strata Type 1 10 Type 2 11 Type 3 11 Quality Type A Quality Type B 13 Quality Type C 7 Quality Type D 8 Formation generally well mapped and (or) high percentage of formation contains resource strata of type A Meets or exceeds WSDOT specs for all rock products Minimal amount of fractures 9 Minimal percent waste rock 20 percent or more rockery size material produced None 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 9 Up to 10 percent waste rock 20 percent or less rockery size material produced 10 Formation undivided 12 and >50% of formation contains mostly resource strata of type B as defined for Type 1 bedrock Formation undivided 12 and <50% formation contains mostly resource strata of type B as defined for Type 1 Formation mostly divided locally and contains a high percentage of resource strata of type C Rock will not meet WSDOT specs Highly fractured 9 10 to 30 percent waste rock Minimal rockery size material produced 10 Formation undivided 12 and >50% of formation contains mostly resource strata of type C as defined for Type 1 bedrock Formation undivided 12 and <50% of formation contains mostly resource strata of type C as defined for Type 1 Generally unsuitable for extraction 8 >30 percent waste rock Highly to very highly fractured 9 and (or) weathered and (or) poorly lithified No rockerysize material produced

22 Inventory Map

23 Example Quads Tumwater and Lacey DRAFT DRAFT Legend Green = Sand & Gravel Brown = Bedrock White = Non County Land Grey = Other Land Red Outlines = Existing designated mineral lands and mining activities

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25 CLASSIFICATION & DESIGNATION FACTORS: MINIMUM GUIDELINES Geology: depth and quality of resource and characteristics of resource site Projected life of the resource Resource availability in the region Accessibility and proximity to point of use or market Energy costs of transporting materials Proximity to population areas General land use patterns Availability of utilities, including water supply Surrounding parcel sizes and uses Availability of public roads and public services Subdivision and zoning of small lots Counties and cities must designate known mineral deposits so that access to mineral resources of longterm commercial significance is not knowingly precluded. Priority land use for mineral extraction should be retained for all designated mineral resource lands WAC

26 NEXT STEPS Designation Factors to Consider Jurisdictional Criteria Intensity of Surrounding Uses Overlap with Other Resource Lands (Long Term Forestry and Agriculture) Overlap with Critical Areas Conservation Develop and review policies related to mineral lands Policies will be considered as part of the public review of Chapter 3 Natural Resources Element

27 Land Use Natural Resources Transportation Housing Utilities Environment Economic Development Capital Facilities Health Questions? Staff Contact: Allison Osterberg, Senior Planner x7011