MINING AND RECLAMATION PLAN
PORTOLA AGGREGATES PLUMAS COUNTY, CALIFORNIA
Prepared for
TLT Enterprises
Prepared by
VESTRA Resources Inc. 5300 Aviation Drive Redding, California 96002
NOVEMBER 2020
November 9, 2020
71305
Becky Herrin Plumas County Planning Department 555 Main Street Quincy, CA 95971
RE: Reclamation Plan Application Package Portola Aggregates
Dear Ms. Herrin:
Please find attached an application package for a Use Permit and Permit to Mine/Reclamation Plan for the Portola Aggregates site located at 77413 Meadow Way in Portola. The mine is owned by TLT Enterprises LLC and will be operated by Hat Creek Construction, Inc. The document was prepared on behalf of TLT Enterprises and is being submitted on their behalf. The check for the application fee is being conveyed from TLT Enterprises directly under separate cover.
Please call with any questions regarding this submittal at 530-223-2585.
Sincerely,
VESTRA Resources, Inc.
Wendy Johnston Project Manager
Attachment
P:\Projects\2013\71305 Hat Creek Construction\Portola Pit at Carmichael Trust Property\Reclamation and Mining Plan Application\RecPlan Cover Letter_110920.doc
DocuSign Envelope ID: 5A27F28F-9624-4F7B-8F4A-2B13FFF7FD5F
DEPARTMENTAL USE ONLY Initial Completeness Verified by Date Recv'd Receipt No. $ File No.
DEVELOPMENT PERMIT APPLICATION
PERMIT TO MINE/RECLAMATION PLAN
Instructions to applicant(s):
1. Complete the form and mail or take to: Planning & Building Services 555 Main Street Quincy, CA 95971
2. Use additional sheets of paper if necessary to complete the information requested. 3. Pay the filing fee set forth in the fee schedule. 4. Make the check payable to Planning & Building Services.
I. APPLICANT INFORMATION
Name of applicant and operator* Hat Creek Construction, Inc.
Mailing Address 24339 Hwy 89, Burney, CA 96013
Telephone 530-335-5501
Owner(s) of property, or mineral rights if other than property owner(s)
Name TLT Enterprises LLC
Mailing Address 24339 Hwy 89, Burney, CA 96013
Telephone 530-335-5501
II. PROPERTY INFORMATION
Township 23N Range 13E Section 25 Acreage 715 and Township 23N, Range 14E, Sections 19, 20, 29, & 30 Street Address 77413 Meadow Way, Portola, CA 96122
Nearest Town Portola
Assessor’s Parcel Number(s) 025-050-055 & 025-100-036
Provide a copy of the legal description of the property.
*If agent or purchaser is making application, attach letter of authorization signed by the owner. Perry Thompson I, hereby authorize the applicant to make this application. (Owner of the Property)
11/6/2020
(Signature) (Date)
Rev. 7/2020
III. MINING OPERATION & CLOSURE
1. State the anticipated type of mineral(s) to be mined:
2. State the anticipated quantity of mineral(s) to be mined:
3. Proposed initiation date: Proposed termination date:
4. State the maximum anticipated depth of mining: * * * Depth of mining should be tied to a verifiable benchmark that can be referenced in the field for compliance monitoring. * * *
5. Provide a detailed geologic description of the area of the surface mining operation. Describe the type of mine and the method for removing overburden and the mineral commodity.
6. Describe a plan for the type of surface mining to be employed.
7. Provide a topographic map of the project area. * * * This map should include current and final contours drawn at appropriate intervals for the site’s conditions, that are supported by cross-sections, the original and proposed final drainage patterns, areas of existing vegetation and proposed areas of revegetation, setbacks from adjacent properties and sensitive areas, location of mining operations area, the location of stockpiled materials, the location of equipment, materials, and supplies, and temporary and permanent locations of erosion control facilities, including any sediment basins, benches, and berms. * * *
* * * The maps provided should include a legend, north arrow, a scale for reference, and clearly defined and accurately drawn property lines, setbacks and reclamation plan boundary. * * *
* * *All maps, diagrams or calculations that require preparation in accordance with the Professional Engineers Act (Chapter 7, commencing with Section 6700, of Division 3 of the Business and Professions Code), the Geologist and Geophysicist Act (Chapter 12.5, commencing with Section 7800, of Division 3 of the Business and Professions Code) or the Professional Land Surveyors Act (Chapter 15, commencing with Section 8700, of Division 3 of the Business and Professions Code) shall be prepared by a California- licensed professional, shall include his or her license number and name, and shall bear the signature and seal of the licensee. * * *
8. Provide the size and attach a legal description of the lands that will be affected by the surface mining operation and the names and addresses of the owners of all surface interests and mineral interests in the lands.
9. Provide location of railroads, utility facilities, access roads, temporary roads to be reclaimed, and any roads remaining for the approved end use.
10. Provide a time schedule that will provide for the completion of surface mining on each segment of the mined lands so that reclamation can be initiated at the earliest possible time on those portions of the mined lands that will not be subject to further disturbance by the surface mining operation.
11. Provide an assessment of the effect of implementation of the reclamation plan on future mining in the area.
12. Describe how potential impacts to public health and safety (exposure) will be minimized.
13. If mining activity results in any surface openings, describe how they will be gated or otherwise protected from public entry, but preserve wildlife access.
14. Describe the method for disposal of old equipment prior to mine closure.
15. Describe how equipment, materials, and supplies will be stored in designated areas. Describe how waste material will be disposed of in accordance with current laws.
16. Describe how all structures and equipment are to be dismantled and removed prior to mine closure unless they are
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deemed necessary for the proposed end use. IV. END LAND USE
1. Describe the proposed use or potential uses of the mined lands after reclamation and evidence that all owners of a possessory interest in the land have been notified of the proposed use or potential uses.
2. Describe the manner in which reclamation, adequate for the proposed use or potential uses, will be accomplished, including a description of the manner in which know contaminants will be controlled and mining waste will be disposed and a description of the manner in which affected streambed channels and streambanks will be rehabilitated to a condition that minimizes erosion and sedimentation.
V. GEOTECHNICAL REQUIREMENTS
1. Describe the designed steepness and proposed physical treatment of final mined slopes. * * * Slope angles specified in the reclamation plan must be less than the critical gradient of the type of material involved. Whenever final slopes approach the critical angle (gradient) for the type of material involved, an engineering analysis of the slope stability must be undertaken by a California-registered civil engineer and/or a California-certified engineering geologist. * * *
2. Demonstrate how cut slopes, including quarry highwall and cut faces, will maintain a minimum factor of safety adequate for the end use or conform with surrounding topography.
3. Describe fill placement and compaction with reference to the end use and the appropriate engineering standards and technology.
4. Indicate the maximum depth and/or height of fill material and show where it is located.
5. When the proposed end use is urban, including building sites and road beds, describe how the proper compaction will be accomplished.
6. Final reclamation fill slopes cannot be steeper than 2:1 (horizontal to vertical), except when engineering and revegetation analyses allow. Provide the appropriate analyses if final reclamation fill slopes will be steeper than 2:1.
7. Demonstrate, using maps or illustrations, that final landforms of fills will conform with surrounding topography and/or end use.
VI. HYDROLOGY & WATER QUALITY
1. Demonstrate how surface and groundwater will be protected from siltation and pollutants that may diminish water quality.
2. Describe how erosion and sedimentation will be controlled during all phases of mining and reclamation.
3. Provide a sediment and erosion control monitoring plan for the project.
4. Discuss how erosion control facilities (dikes, ditches, etc.) will be installed and maintained where necessary to control surface runoff and drainage.
5. Erosion control measures should be designed to receive and control runoff from at least a 20 year-1 hour intensity storm event. Include the calculations that demonstrate the adequacy of the erosion control measures.
6. Demonstrate how runoff will be conveyed to interior basins or to natural drainage course.
7. Provide mitigations which show that natural drainages, when covered, restricted, diverted, or otherwise impacted by mining activities, will not result in increased runoff or sedimentation.
8. Demonstrate that design and construction of settling ponds or sediment retention basins will prevent sedimentation of streams.
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9. Discuss how overburden stockpiles will be managed to minimize water and wind erosion. 10. Identify potential on-site contaminants and describe their control or disposal. Describe how imported wastes, such as domestic garbage, chemicals, oil, or other materials will be disposed.
VII. ENVIRONMENTAL SETTING & PROTECTION OF FISH AND WILDLIFE HABITAT
1. Provide a detailed description of the environmental setting of the project area and an assessment of the potential impact of reclamation on surrounding land uses. * * * This information should include a description of the vegetation and wildlife on the site. Vegetation can be described by overstory (tree or shrub) density, canopy closure, height, and composition, as well as, understory composition and stratification. Identify sensitive species and sensitive natural communities (e.g. wetlands and riparian zones) that may occur within, or in the vicinity of, the project. * * *
2. Describe the vegetative cover, suitable to the end use and capable of self-generation that will be established.
3. Describe measures that will be undertaken to protect fish and wildlife habitat.
4. Describe how sensitive species and habitats will be conserved or how impacts to them will be mitigated.
VIII. RESOILING & REVEGETATION
1. Describe how topsoil will be conserved and stockpiled and how it will be protected from wind and water erosion.
2. Describe the reapplication of the soil following mining.
3. Map topsoil resources prior to stripping. Indicate the location of topsoil stockpiles on the site maps and in the field. * * * Salvageable topsoil should be removed prior to disturbance by mining. Topsoil should be reapplied as soon as possible after mining is completed in a given area. * * *
4. Include a soils analysis if the topsoil has been stockpiled more than two years or if the topsoil has been chemically altered.
5. Describe how fertilizers or soil amendments are used so as not to contaminate surface or groundwater.
6. Describe revegetation plan, including a vegetation monitoring plan, specific to the property. * * * Some essential components of a revegetation plan include a statement of project goals, a description of site preparation, the source(s) and types of plant materials, seed application rates, a planting schedule, a discussion of plant protection measures, a vegetation maintenance schedule (including weed control), a monitoring schedule with site-specific monitoring criteria, and a discussion of remedial measures. * * *
7. Describe how vegetation and overburden removal will be minimized preceding mining.
8. Assess planting procedures through the use of test plots if success has not been proven previously in similar vegetation and with similar species.
9. Describe how decompaction will be achieved to permit successful rooting of vegetation.
10. Designate all haul roads and traffic routes to be reclaimed following cessation of mining.
11. Describe soil stabilizing measures to be used to control erosion during plant establishment.
12. If irrigation is used during the period of plant establishment, demonstrate that the vegetation will be self-sustaining without irrigation for a minimum of two years prior to release of financial assurances.
13. Describe how weeds will be managed.
14. Describe quantitative performance standards for vegetative cover, density, and species richness against which to measure the success of the revegetation effort.
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IX. OTHER REQUIREMENTS FOR RECLAMATION PLAN SUBMITTAL (PRC 2772(b)
1. Include a chart identifying the page number, chapter, appendix, or other specific location in the reclamation plan where content meeting the requirements, as applicable, of Sections 2772, 2773, and 2773.3 and Article 1 (commencing with Section 3500) and Article 9 (commencing with Section 3700) of Subchapter 1 of Chapter 8 of Division 2 of Title 14 of the California Code of Regulations, is located.
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DEPARTMENTAL USE ONLY Initial Completeness Verified by Date Recv'd Receipt No. $ File No.
DEVELOPMENT PERMIT APPLICATION
SPECIAL USE PERMIT
Instructions to applicant(s):
1. Complete the form and mail or take to: Planning & Building Services 555 Main Street Quincy, CA 95971
2. Use additional sheets of paper if necessary to complete the information requested. 3. Pay the filing fee set forth in the fee schedule (attached). 4. Make the check payable to Planning & Building Services.
A. Applicant (s)
Name
Mailing Address
Telephone
Interest in Property (Owner, Agent* or Purchaser*)
B. Owner (s)
Name
Mailing Address
Telephone
C. Property
Street Address
Nearest town
Assessors Parcel Number(s)
Present zoning
D. Use Applied For
*If agent or purchaser is making application, attach letter of authorization signed by the owner.
Rev. 7/2020
DocuSign Envelope ID: 5A27F28F-9624-4F7B-8F4A-2B13FFF7FD5F
E. Description of Proposed Use
Describe below, or on an attached sheet, the proposed use, its operation, the nature and type of buildings, structures, and other facilities to be used and the types of services to be provided. The Portola Aggregates Mining and Reclamation Plan has been prepared to cover revisions to the current Special Use Permit (MR 3-7-89-02/CA Mine ID 91-32-0022) for surface mining and reclamation activities on APNs
025-050-055 and 025-100-036. This plan addresses the excavation and processing of aggregate on an approximately 715-acre site located roughly two miles northeast of the City of Portola. Approximately 213 acres of the project site will be affected by active mining operations, which will occur over 50 years. Operations at the site will include extraction, processing (washing and crushing), an asphalt plant, and lime treatment. It is anticipated that the site will be used on a part-time basis, where equipment will be moved in for specific projects and removed when complete. F. Applicant's Statement of Justification
The Zoning Ordinance requires that the following condition MUST be established before any permit can be granted: (Explain in detail how your case qualifies)
Granting the permit will not result in material damages to adjacent properties and will not result in establishment of a use which is socially, economically or environmentally incompatible with the surrounding area because: The mine will provide revenue, jobs, and construction materials locally and regionally. Mitigation will be included
to allow site activities to be compatible with surrounding uses.
G. Plot Plan
Attach to this application seven (7) copies of a plot plan drawn to scale which shows the boundaries and dimensions of the property and related improvements for which the permit is requested. To avoid delay in processing your application make sure your plot plan is COMPLETE, delineated correctly, and properly dimensioned.
If this application is for a project within the Sierra Valley Groundwater Management District, attach evidence that the requirements of that district have been met.
H. Signature (s) of Applicant (s)
I certify that the information provided is correct and waive any action against the County of Plumas in the event the County's action is set aside due to erroneous information provided hereon.
11/6/2020
Signature Date
Signature Date
Rev. 7/2020
DMR Reclamation Plan Checklist Reclamation Plan Content Checklist
The Division of Mine Reclamation (DMR) reviews reclamation plans for compliance and completeness pursuant to Public Resources Code (PRC) Section 2772.1(b)(1). When submitting a reclamation plan to DMR, the lead agency must certify that the reclamation plan is a complete submission and is in compliance with SMARA and associated regulations and the lead agency’s mining ordinance pursuant to PRC 2772.1(a)(3) (A-E). Additionally, pursuant to PRC 2772.1(a)(2), information prepared as part of a permit application or environmental document (pursuant to CEQA) shall be incorporated into the reclamation plan if it is used to satisfy the requirements of SMARA and associated regulations. These items shall be properly indexed in a Required Contents Chart and included in an appendix to the reclamation plan.
This checklist may assist operators and lead agencies when preparing and reviewing draft proposed reclamation plans and reclamation plan amendments in determining if they meet the minimum content requirements of the Surface Mining and Reclamation Act of 1975 (SMARA) and associated regulations (see box below for sections relevant to reclamation plans).
Surface Mining and Reclamation Act of 1975 Public Resources Code (PRC) Division 2. Geology, Mines and Mining Chapter 9. Surface Mining and Reclamation Act of 1975 Section 2710 et seq. This portion includes requirements for reclamation plans. Associated Regulations California Code of Regulations (CCR) Title 14. Natural Resources Division 2. Department of Conservation Chapter 8. Mining and Geology Subchapter 1. State Mining and Geology Board
Article 1. Surface Mining and Reclamation Practice. Commencing with Section 3500 This portion includes minimum acceptable mining and reclamation practices for surface mining operations.
Article 9. Reclamation Standards. Commencing with Section 3700 This portion includes performance standards, which may apply to surface mining operations pursuant to CCR Section 3700.
The checklist is divided into seven topical areas: General Considerations, Geology and Geotechnical, Hydrology and Water Quality, Sensitive Species and Habitat, Topsoil, Revegetation, and Agriculture. To use the checklist, place a checkmark next to items that have been addressed by the reclamation plan or leave it blank if the reclamation plan is deficient. Alternatively, write N/A if the item is not applicable to the specific surface mining operation being reviewed.
Disclaimer: This checklist, prepared by DMR, paraphrases portions of SMARA and associated regulations that address the content of reclamation plans and plan amendments. DMR staff uses this checklist internally in performing our review of reclamation plans. However, use of this checklist is not required and it is provided only as a helpful tool. DMR always recommends consulting the full text of SMARA and associated regulations, available at the link below. Additionally, completion of this checklist does not guarantee completeness or compliance of the reclamation plan pursuant to PRC Section 2772.1(b)(1). Analysis of completeness and compliance requires thorough review of each specific project. http://www.conservation.ca.gov/index/Pages/lawsregs.aspx
Reclamation Plan Content Checklist — Page 1 of 6 Revised April 9, 2018
Mine Name: Checklist Completed by: End Use: Date: GENERAL CONSIDERATIONS
Authority Requirements/Practices/Standards or N/A Required contents chart: A chart identifying the location (e.g. page number, chapter, appendix, or other location in the PRC 2772(b) reclamation plan) of content that meets the requirements of PRC Sections 2772, 2773, 2773.3 and CCR Articles 1 and 9 (as delineated in this checklist). PRC Contact information: 2772(c)(1) Name and address of the surface mining operator and any person designated by the operator as an agent for service of process (must reside in CA). Material quantity and type: PRC The anticipated total quantity and type of minerals to be mined (see Annual Report Instructions, 2772(c)(2) Exhibit B, for mineral types and units of measure). Dates: PRC The initiation and termination dates of mining (be as specific as possible, e.g. December 31, 2772(c)(3) 2030). PRC Depth of mining: 2772(c)(4) The maximum anticipated depth of the surface mining operation. Reclamation plan maps shall include: Size and legal description of lands affected by surface mining operations; Names and addresses of owners of all surface interests and mineral interests; Property lines, setbacks, and the reclamation plan boundary; PRC Existing and final topography with contour lines at appropriate intervals; 2772(c)(5) (A-F) Detailed geologic description of the area of the surface mining operation; Locations of railroads, utility features, and roads (access roads, temporary roads to be reclaimed, and any roads remaining for the end use). All maps, diagrams, or calculations that are required to be prepared by a California-licensed professional shall include the preparer’s name, license number, signature & seal. Mining method and schedule: PRC A description of the mining methods and a time schedule that provides for completion of mining 2772(c)(6) on each segment so that reclamation can be concurrent or phased. Subsequent use(s): PRC A description of the proposed subsequent use(s) after reclamation 2772(c)(7) Evidence that all landowners have been notified of the proposed use. PRC Impact on future mining: 2772(c)(9) A statement regarding the impact of reclamation on future mining on the site. Signed statement: PRC Statement signed by the operator accepting responsibility for reclamation of the mined lands per 2772(c)(10) the reclamation plan. Pre-SMARA areas: PRC 2776(b- Reclamation plans shall apply to operations conducted after January 1, 1976 or to be conducted c) in the future. Mined lands disturbed prior to January 1, 1976 and not disturbed after that date may be excluded from the reclamation plan. Public health and safety: CCR A description of how any potential public health and safety concerns that may arise due to 3502(b)(2) exposure of the public to the site will be addressed. Equipment storage and waste disposal: CCR 3709(a) Designate areas for equipment storage and show on maps. All waste shall be disposed of in accordance with state and local health and safety ordinances. CCR 3709(b) Structures and equipment removed:
Reclamation Plan Content Checklist — Page 2 of 6 Revised April 9, 2018
Structures and equipment should be dismantled and removed at closure, except as demonstrated to be necessary for the proposed end use. Well closures: CCR 3713(a) Drill holes, water wells, monitoring wells will be completed or abandoned in accordance with laws, unless demonstrated necessary for the proposed end use. Underground openings: CCR 3713(b) Any portals, shafts, tunnels, or openings will be gated or protected from public entry, and to preserve access for wildlife (e.g. bats).
GEOLOGY AND GEOTECHNICAL
Authority Requirements/Practices/Standards or N/A PRC A description of the general geology of the area 2772(c)(5) A detailed description of the geology of the mine site. If a metallic mine is located on, or within one mile of, any “Native American sacred site” and is located in an “area of special concern, ” the reclamation plan shall require that all excavations PRC 2773.3 and/or excess materials be backfilled and graded to achieve the approximate original contours of the mined lands prior to mining. CCR The source and disposition of fill materials used for backfilling or grading shall be considered in 3502(b)(4) the reclamation plan. The designed steepness and treatment of final slopes must consider the physical properties of slope materials, maximum water content, and landscaping. CCR The reclamation plan shall specify slope angles flatter than the critical gradient for the type of 3502(b)(3) slope materials. When final slopes approach the critical gradient, a Slope Stability Analysis will be required. CCR 3704.1 Backfilling required for surface mining operations for metallic minerals. For urban use, fill shall be compacted in accordance with Uniform Building Code, local grading CCR 3704(a) ordinance, or other methods approved by the lead agency. CCR 3704(b) For resource conservation, compact to the standards required for that end use. Final reclamation fill slopes shall not exceed 2:1 (H:V), except when allowed by site-specific CCR 3704(d) engineering analysis, and the proposed final slope can be successfully revegetated. See also Section 3502(b)(3). CCR 3704(e) At closure, all fill slopes shall conform with the surrounding topography or approved end use. Final cut slopes must have a minimum slope stability factor of safety that is suitable for the end CCR 3704(f) use and conforms with the surrounding topography or end use.
HYDROLOGY AND WATER QUALITY
Authority Requirements/Practices/Standards or N/A For operations within the 100-year flood plain (defined by FEMA) and within one mile up- or PRC 2770.5 downstream of a state highway bridge, Caltrans must be notified and provided a 45-day review period by the lead agency. PRC Description of the manner in which contaminants will be controlled and mine waste will be 2772(c)(8)(A) disposed. PRC The reclamation plan shall include a description of the manner in which stream banks/beds will 2772(c)(8)(B) be rehabilitated to minimize erosion and sedimentation. The reclamation plan shall establish site-specific sediment and erosion control criteria for PRC 2773(a) monitoring compliance with the reclamation plan. CCR Temporary stream and watershed diversions shall be detailed in the reclamation plan. 3502(b)(6) CCR Stockpiles of overburden and minerals shall be managed to minimize water and wind erosion. 3503(a)(2)
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CCR Operations shall be conducted to substantially prevent siltation of groundwater recharge areas. 3503(b)(2) CCR Erosion control facilities shall be constructed and maintained where necessary to control 3503(a)(3) erosion. CCR Settling ponds shall be constructed where they will provide a significant benefit to water quality. 3503(b)(1) Disposal of mine waste and overburden shall be stable and shall not restrict natural drainage CCR 3503(d) without suitable provisions for diversion. Grading and revegetation shall be designed to minimize erosion and convey surface runoff to CCR 3503(e) natural drainage courses or interior basins. Spillway protection shall be designed to prevent erosion. Surface mining and reclamation activities shall be conducted to protect on-site and downstream CCR 3706(a) beneficial uses of water. Water quality, recharge potential, and groundwater storage that is accessed by others shall not CCR 3706(b) be diminished. Erosion and sedimentation shall be controlled during all phases of construction, operation, CCR 3706(c) reclamation, and closure of surface mining operations to minimize siltation of lakes and water courses as per RWQCB/SWRCB. Surface runoff and drainage shall be controlled to protect surrounding land and water resources. CCR 3706(d) Erosion control methods shall be designed for not less than 20 year/1 hour intensity storm event. Impacted drainages shall not cause increased erosion or sedimentation. Mitigation alternatives CCR 3706(e) shall be proposed in the reclamation plan. CCR Stream diversions shall be constructed in accordance with the Lake and Streambed Alteration 3706(f)(1) Agreement (LSAA) between the operator and the Department of Fish and Wildlife. CCR Stream diversions shall also be constructed in accordance with Federal Clean Water Act and the 3706(f)(2) Rivers and Harbors Act of 1899. CCR 3706(g) All temporary stream diversions shall eventually be removed and the affected land reclaimed. Surface and groundwater shall be protected from siltation and pollutants in accordance with the CCR 3710(a) Porter-Cologne Act, the Federal Clean Water Act, and RWQCB/SWRCB requirements. In-stream mining shall be conducted in accordance with Section 1600 et seq. of the California CCR 3710(b) Fish and Game Code, Section 404 of the Clean Water Act, and Section 10 of the Rivers and Harbors Act of 1899. In-stream mining shall be regulated to prevent impacts to structures, habitats, riparian vegetation, groundwater levels, and banks. CCR 3710(c) In-stream channel elevations and bank erosion shall be evaluated annually using extraction quantities, cross-sections, and aerial photos. Mine waste and tailings and mine waste disposal units are governed by SWRCB waste disposal CCR 3712 regulations and shall be reclaimed in accordance with this article: CCR Article 1. Surface Mining and Reclamation Practice. Section 3500 et seq.
SENSITIVE SPECIES AND HABITAT
Authority Requirements/Practices/Standards or N/A A description of the environmental setting (identify sensitive species, wildlife habitat, sensitive CCR natural communities, e.g. wetlands). 3502(b)(1) Impacts of reclamation on surrounding land uses. CCR 3503(c) Fish and wildlife habitat shall be protected by all reasonable measures. Sensitive species shall be conserved or mitigated as prescribed by the federal and California CCR 3703(a) Endangered Species Acts. Wildlife habitat shall be established on disturbed land at least as good as pre-project, unless end CCR 3703(b) use precludes its use as wildlife habitat. CCR 3703(c) Wetlands shall be avoided or mitigated at 1:1 minimum for both acreage and habitat value. CCR 3704(g) Piles or dumps shall not be placed in wetlands without mitigation. In-stream mining shall not cause fish to be trapped in pools or off-channel pits, or restrict CCR 3710(d) migratory or spawning activities.
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TOPSOIL
Authority Requirements/Practices/Standards or N/A CCR Removal of vegetation and overburden preceding mining shall be kept to a minimum. 3503(a)(1) When the reclamation plan calls for resoiling, mine waste shall be leveled and covered with a layer of finer material. A soil layer shall then be placed on this prepared surface. CCR 3503(f) The use of soil conditioners, mulches, or imported topsoil shall be considered where such measures appear necessary. Mine waste shall be stockpiled to facilitate phased reclamation and kept separate from topsoil or CCR 3704(c) other growth media. If soil is altered or other than native topsoil, soil analysis is required. Add fertilizers or soil CCR 3705(e) amendments if necessary. All salvageable topsoil shall be removed as a separate layer. CCR 3711(a) Topsoil and vegetation removal should not precede mining by more than one year. Topsoil resources shall be mapped prior to stripping and location of topsoil stockpiles shown on map included in the reclamation plan. CCR 3711(b) Topsoil and other growth media shall be maintained in separate stockpiles. Test plots may be required to determine the suitability of growth media for revegetation purposes. Soil salvage operations and phases of reclamation shall be set forth in the reclamation plan to CCR 3711(c) minimize the area disturbed and to achieve maximum revegetation success. Topsoil and growth media shall be used to phase reclamation as soon as can be accommodated following the mining of an area. Topsoil stockpiles shall not be disturbed until needed for reclamation. CCR 3711(d) Topsoil stockpiles shall be clearly identified. Topsoil shall be planted with vegetation or otherwise protected to prevent erosion and discourage weeds. Topsoil shall be redistributed in a manner resulting in a stable, uniform thickness consistent with CCR 3711(e) the end use.
REVEGETATION
Authority Requirements/Practices/Standards or N/A The reclamation plan shall be specific to the property and shall establish site-specific criteria for PRC 2773(a) evaluating compliance with the reclamation plan with respect to revegetation. Available research regarding revegetation methods and selection of species given the CCR 3503(g) topography, resoiling characteristics, and climate of the mined areas shall be used. Baseline studies shall be conducted prior to mining activities to document vegetative cover, CCR 3705(a) density, and species richness. Vegetative cover shall be similar to surrounding habitats and self-sustaining. Test plots shall be conducted simultaneously with mining to ensure successful implementation of CCR 3705(b) the proposed revegetation plan. Decompaction methods, such as ripping and disking, shall be used in areas to be revegetated to CCR 3705(c) establish a suitable root zone for planting. CCR 3705(d) Roads shall be stripped of roadbase materials, resoiled, and revegetated, unless exempted. Temporary access shall not disrupt the soil surface on arid lands except where necessary for CCR 3705(f) safe access. Barriers shall be installed to keep unauthorized vehicles out. Use local native plant species (unless non-native species meet the end use). CCR 3705(g) Areas to be developed for industrial, commercial, or residential shall be revegetated for the interim period to control erosion. CCR 3705(h) Planting shall be conducted during the most favorable period of the year for plant establishment. CCR 3705(i) Use soil stabilizing practices and irrigation when necessary to establish vegetation.
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If irrigation is used, demonstrate that revegetation has been self-sustaining without irrigation for CCR 3705(j) two years prior to the release of financial assurance. CCR 3705(k) Noxious weeds shall be monitored and managed. Plant protection measures such as fencing and caging shall be used where needed for CCR 3705(l) revegetation success. Protection measures shall be maintained until revegetation efforts are successfully completed and the lead agency authorizes removal. Quantitative success standards for vegetative cover, density, and species richness shall be included in the reclamation plan. CCR3705(m) Monitoring to occur until success standards have been achieved.
Sampling techniques for measuring success shall be specified. Sample size must be sufficient to provide at least an 80 percent statistical confidence level.
AGRICULTURE
Authority Requirements/Practices/Standards or N/A Where the end use will be agriculture, prime agricultural land shall be returned to a fertility level CCR 3707(a) specified in the reclamation plan. CCR 3707(b) Segregate and replace topsoil in proper sequence by horizon in prime agricultural soils. Post reclamation productivity rates for prime agricultural land must be equal to pre-project CCR 3707(c) condition or to a similar site for two consecutive years. Productivity rates shall be specified in the reclamation plan. If fertilizers and amendments are applied, they shall not cause contamination of surface or CCR 3707(d) groundwater. For sites where the end use is to be agricultural, non-prime agricultural land must be reclaimed CCR 3708 to be capable of sustaining economically viable crops common to the area.
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TABLE OF CONTENTS
SECTION
1.0 PROJECT SUMMARY ...... 1
2.0 INTRODUCTION ...... 2 2.1 Plan Overview and Contents ...... 2 2.2 Project Location ...... 2 2.3 General Site Characteristics ...... 2 2.4 Project Activities and Timeline ...... 3 2.5 Owners of Surface Mining Interests ...... 3
3.0 SITE CONDITIONS ...... 4 3.1 Existing Land Use ...... 4 3.2 Geologic Description ...... 4 3.3 Topography ...... 6 3.4 Soil Types ...... 7 3.5 Natural Resources ...... 7 3.6 Surface and Groundwater Characteristics ...... 10 3.7 Climate ...... 11 3.8 Air Quality ...... 12 3.9 Hours of Operation...... 12 3.10 Utilities and Services ...... 13 3.11 Other Permits ...... 13
4.0 EXCAVATION AND MINING PLAN ...... 14 4.1 Excavation and Mining Overview ...... 14 4.2 Materials to be Mined ...... 14 4.3 Mining Operation Plan ...... 14
5.0 RECLAMATION PLAN ...... 21 5.1 Reclamation Process ...... 21 5.2 Engineering Data ...... 21 5.3 Revegetation Plan ...... 22 5.4 Revegetation Plan and Design ...... 22 5.5 Plant Procurement and Installation Procedures ...... 25 5.6 Planting Seeds (Grasses) ...... 25 5.7 Planting of Containerized Seedlings ...... 26
6.0 MAINTENANCE DURING THE MONITORING PERIOD ...... 27 6.1 Invasive Species...... 27 6.2 Herbivory Control and Habitat Protection ...... 27 6.3 Monitoring Period ...... 27 6.4 Monitoring Report ...... 28 6.5 Performance Criteria ...... 28
7.0 RECLAMATION RESPONSIBILITY ...... 29 7.1 Financial Assurance ...... 29 7.2 Statement of Responsibility ...... 29
TABLES
3-1 Surrounding Landowners...... 5 3-2 Soil Types ...... 8 3-3 DWR Well Information ...... 10 3-4 Precipitation Summary ...... 11 3-5 Plumas County Evapotranspiration ...... 11 4-1 Estimated Quarry Volumes by Phase ...... 15 4-2 Hat Creek Individual Operations Noise Levels...... 20 5-1 Perennial % Cover Data...... 23 5-2 Density and Species Richness ...... 23 5-3 Plant Species Inventory Within Plots ...... 24 5-4 Planting Specifications for Eastside Pine Species ...... 24 5-5 Revegetation Grass Seed Recommendations ...... 25
FIGURES
2-1 General Site Location 2-2 USGS Topographic Map 2-3 Site Layout 3-1 Zoning 3-2 Surrounding Parcels 3-3 Geology 3-4 Current Topography 3-5 Habitat Classifications 3-6 CNDDB Occurrences 3-7 Hydrology 3-8 DWR Groundwater Wells 4-1 Mine Phases 4-2 Cross-Sections 4-3A Phase 1 4-3B Phase 2 4-3C Phase 3 4-3D Phase 4 4-4 Plant Layout 4-5 Site Drainage
APPENDICES
A Current Reclamation Plan B Visual Quality Analysis C NRCS Soils Report D Biological Resources Assessment E Geotechnical Report F SWPPP
1.0 PROJECT SUMMARY
Project Name: Portola Aggregates Mining and Reclamation Plan
Mine Operator: Hat Creek Construction & Materials, Inc. 24339 Hwy 89 Burney, California 96013 530-335-5501
Owner of Property: TLT Enterprises LLC 24339 Hwy 89 Burney, California 96013 530-335-5501
Owner of Mineral Rights: TLT Enterprises LLC 24339 Hwy 89 Burney, California 96013 530-335-5501
Location: The Portola Aggregates project site is located along the north side of Hwy 70, approximately 2 miles northeast of the city of Portola, close to the landfill.
Legal Description: Project site identified as APNs 025-050-055 and 025-100-036.
Latitude/Longitude: 39.493786 (39°49’37.86”); -120.271385 (-120°27’13.85”)
Directions to Site: From Highway 70, turn north onto Meadow Way
Total Parcel Size: 715 acres
Total Area to be Mined: 226 acres
Total Area to be Reclaimed: 256 acres
Quantity/Type of Material to be Mined: 33,915,000 cubic yards aggregate
Proposed Start-Up Date: Spring 2022
Proposed Termination Date: 2072
Proposed Land Use After Reclamation: Open Space/ Agricultural Preserve
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2.0 INTRODUCTION
2.1 Plan Overview and Contents
The Portola Aggregates Mining and Reclamation Plan has been prepared to cover revisions to the current Special Use Permit (MR 3-7-89-02/CA Mine ID 91-32-0022) for surface mining and reclamation activities in Plumas County, California, on Assessor’s Parcel Nos. 025-050-055 and 025-100-036. The current permit covers mining on approximately 10 acres. The current Reclamation Plan and permit are included in Appendix A. This plan addresses the excavation and processing of aggregate on an approximately 715-acre site located roughly two miles northeast of the City of Portola. Approximately 256 acres of the project site will be affected by active mining operations, which will occur over 50 years.
Operations at the site will include extraction, processing (washing and crushing), an asphalt plant, and lime treatment. It is anticipated that the site will be used on a part-time basis, where equipment will be moved in for specific projects and removed when complete.
The project site, although zoned as agricultural preserve currently operates under special permit use “mining.” The project will be operated by Hat Creek Construction. The address of the property is 77413 Meadow Way Portola, CA.
This plan was prepared in compliance with Plumas County requirements (Planning & Zoning Code, Chapter 5 Section 9, Surface Mining and Reclamation) and the California Surface Mining and Reclamation Act of 1975 (SMARA), as amended, and meets the California Code of Regulations, Article 9, Reclamation Standards.
The Mining and Reclamation Plan includes the following chapters:
Chapter 1: Project Summary Chapter 2: Introduction Chapter 3: Site Conditions Chapter 4: Excavation and Mining Plan Chapter 5: Reclamation Plan
2.2 Project Location
The Portola Aggregates site is located approximately two miles northeast of the city of Portola and adjacent to Highway 70 (see Figure 2-1). From Hwy 70 headed east from Portola, turn north onto Meadow Way and then take an immediate right following Meadow Way, follow for approximately 0.8 miles and take a left before the landfill into a gated entrance. Specifically, the site occurs within California USGS Quadrangle 23 (Figure 2-2) and is located in Section 25, Township 23 North, Range 13 East, and Sections 19, 20, 29, and 30, Township 23 North, Range 14 East, MDBM.
2.3 General Site Characteristics
As shown on the Site Plan (Figure 2-3), the Portola Aggregates site has sparse to moderately dense vegetation that includes bitterbrush, scattered manzanita, squaw carpet, sagebrush, and
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perennial and annual grasses and forbs. Most canopies are open stands that include ponderosa pine, cedar, black oak, Jeffrey pine, and white fir. The current mine permit addresses removal of decomposed granite for sand. This area is not used for grazing or crops due to lack of feed for livestock. Surface water is not present onsite and groundwater levels vary. Groundwater elevation is approximately 40 feet below ground surface. Site topography is rolling with some intrusive rock hills. During mining activity, the operator is proposing to remove the intrusive rock hills to a base elevation.
Aspen trees occur adjacent to the current mining site along portions of the project site’s southeastern boundary. The aspen grove will not be affected by mining activities. No residences are located on the project site. The characteristics of the site are discussed in greater detail in Chapter 3 (Site Conditions).
2.4 Project Activities and Timeline
The Portola Aggregates project will encompass a 715-acre site, including two parcels as shown on Figure 2-3. This area is projected to yield approximately 33.9 million cubic yards of material. This includes topsoil (overburden) material that will be excavated and used in reclamation. The project applicant estimates mining will occur on the site for approximately 50 years. The rate of mining will be governed by market demands and local competition. The estimated timeline will be adjusted based on these conditions.
Mining operations will use a variety of large machinery to transport materials to the processing area. Hydraulic excavators will be used for the excavation of mine material. Diesel-powered loaders and trucks will be used for moving materials on the project site from the excavators to the processing plant. The processing plant will be located on the project site so that access and transportation distance will be minimized.
The mined material will be processed using a crusher followed by screening and washing the materials to different sizes. The processed material will become available to the local and regional area for use in general construction projects. The site will be reclaimed as agricultural preserve.
During the mining and reclamation phases of the proposed project removal of vegetation and overburden in the areas not involved in the mining process, will not be disturbed.
2.5 Owners of Surface Mining Interests
Surface and Mineral Right Ownership Operator TLT Enterprises LLC Hat Creek Construction & Materials, Inc. 24339 Hwy 89 24339 Hwy 89 Burney, California 96013 Burney, California 96013 (530) 335-5501 (530) 335-5501
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3.0 SITE CONDITIONS
3.1 Existing Land Use
3.1.1 Project Site Planning and Zoning
The Portola Aggregates site is zoned as “agricultural preserve” as shown on Figure 3-1; however, the current Special Use Permit of the project area includes mining. The historical Portola landfill borders the project site along the east project boundary.
3.1.2 Surrounding Land Use
The lands surrounding the Portola Aggregates site are agricultural preserve, forest, mining, City of Portola, and secondary suburban zoned areas. Adjacent parcels are shown on Figure 3-2 and outlined in Table 3-1. The proposed mining site encompasses an existing mining site and open land. The closest residence is located approximately 700 feet from the mine area boundary. The closest residence is shown on Figure 3-2.
The reclaimed site conditions are not anticipated to have impacts to existing or future surrounding land uses.
3.1.3 Aesthetics
The existing visual characteristics of the site are consistent with the eastside pine habitat. The eastside habitat includes ponderosa pine, Jeffrey pine, white fir, cedar, and an occasional black oak. The undergrowth varies in density but is mainly open land with bitterbrush, manzanita, rabbitbrush and a small area includes light population of sagebrush, and perennial and annual grasses and forbs. The project will modify the visual characteristics of the parcels over time. A portion of the site will be used for an aggregate processing plant and portions of the site will be excavated. Equipment, stockpiles, processing areas, and open excavation areas will not be visible from surrounding roads. This location is behind a locked gate and adjacent to the city landfill.
Portions of the mine site will be visible from areas of the city of Portola. The landfill is currently visible from similar locations. Due to topography and tree cover, the site will not be visible from Highway 70 until Phase III.
A Visual Quality Analysis was conducted and a copy of the report is included in Appendix B.
3.2 Geologic Description
The project site is situated in the northeastern Sierra Nevada mountains physiographic province of California. The Sierra Nevada Mountains are a fault-block mountain range consisting of a large body of plutonic rocks known as the Sierra Nevada Batholith and overlying older metamorphic rocks. The Sierra Nevada physiographic province is bound to the east by the Sierra Nevada Frontal Fault system, which are a series of north-striking, steeply dipping
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Table 3-1 SURROUNDING LANDOWNERS ID APN Owner Mailing Address 1 025-050-055 PORTOLA AGGREGATES - Frank J Carmichael Trust 127 High Plains Road Buffalo, WY 82834 2 025-100-036 PORTOLA AGGREGATES - Frank J Carmichael Trust 127 High Plains Road Buffalo, WY 82834 3 025-050-054 Donald & Pamela Gaines Trustee 7590 Fay Avenue Suite 100 La Lolla, CA 92037 4 025-100-029 Sierra Health Foundation 1321 Garden Highway Sacramento, CA 95833 5 025-100-037 City of Portola PO BOX 1225 Portola, CA 96122 6 125-051-011 Pamela Parks Trustee 1376 Cherry Circle Portola, CA 96122 7 125-051-080 Howard and Karen Thomas Trustee PO BOX 86 Portola, CA 96122 8 125-051-081 Terri Cooper Trustee 1141 Sierra Plum Circle Portola, CA 96122 9 125-460-024 Randy Pitzer and Takano Masami H/W 18 20 AOYAMA KITA 1 CHOME HIMEJI SHI HYOGO 10 125-460-021 Robert and Ellen Vieira Trustee PO BOX 1641 Portola, CA 96122 11 125-460-018 Diana Angel Trustee PO BOX 367 Portola, CA 96122 12 125-460-017 Warren Simison PO BOX 567 Portola, CA 96122 13 125-460-016 Warren Simison PO BOX 567 Portola, CA 96122 14 125-460-015 Warren Simison PO BOX 567 Portola, CA 96122 15 125-460-012 Warren Simison PO BOX 567 Portola, CA 96122 16 125-460-011 Warren Simison PO BOX 567 Portola, CA 96122 17 125-460-010 Warren Simison PO BOX 567 Portola, CA 96122 18 125-080-033 Scott and Susan Arterburn PO BOX 713 Portola, CA 96122 19 125-080-034 Michael Stockland 76613 Aspen Way P Portola, CA 96122 20 125-080-028 Gregory and Kathy Remund 76608 Aspen Drive Portola, CA 96122 21 125-080-023 Mary Sims PO BOX 1762 Portola, CA 96122 22 125-080-024 John and Laurine Prinvale 76756 Sunset Drive Portola, CA 96122
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downward east normal faults. To the west, the range is bound by the Central Valley. The presumed hinge of the Sierra Nevada is buried under several kilometers of sediment along the axis of the Central Valley. To the south, the range is truncated by the Garlock Fault and the Peninsular Ranges. To the north, the boundary of the range is marked by the southern limit of the active Cascade Volcanic arc and the Modoc Plateau volcanic field. Site geology is shown on Figure 3-3.
The Sierra Nevada batholith is overlain in much of its northern portion by more recent extrusive volcanic rocks of diverse origin. These include the flood basalt of the Miocene age Lovejoy Formation, which are believed to be related to the Columbia Flood Basalts and arc volcanic rocks that may have originated from a large-scale root delamination event. Uplift of the fault block containing the Sierra Nevada Mountains has over the past 5 million years exposed the plutonic rocks of the batholith. Where uplift and erosion are less extensive, the metamorphic rocks are exposed, particularly as high-altitude “roof pendants.” The metamorphic rocks are diverse in age and type. They include a wide variety of metavolcanic and metasedimentary rocks of arc and marine affinity that have been subjected to varying degrees of metamorphism. While they occur west of the subject property, no metamorphic rocks have been mapped onsite or observed during field work.
Miocene to Pliocene age extrusive volcanic rocks unconformably overlie the batholith rocks in much of the northeastern part of the Sierra Nevada Mountains. In the project area, these consist of the 15Ma Miocene Lovejoy Formation. The Lovejoy Formation covers the northeastern half of the property. Here it consists primarily of aphanitic basalt flows. Pyroclastic rocks of roughly the same gross composition occur interstitially between the flows. Flow units outcrop conspicuously where cut by drainages and underlie many higher elevation areas of the property. The Lovejoy weathers to sandy loam/gravelly sandy loam with minor clay derived from ferromagnesian minerals.
Plutonic rocks of the Sierra Nevada Batholith comprise the bedrock of the southwestern half of the property. In the vicinity of the property, these rocks are quartz diorite and granodiorite plutons of Cretaceous age. Outcrop of these units is generally more subdued, though they are well exposed as several rounded knolls in the western half of the property. The granodiorite/quartz diorites are phaneritic rocks characterized by a composition dominated by plagioclase feldspar and quartz with minor mafic minerals in the form of “biotite” mica and amphiboles. The granodiorite/quartz diorites weather to a distinctive sandy loam/sandy clay loam colloquially referred to as decomposed granite.
No Holocene-active faults or significant geologic structures have been mapped within 5 miles of the site. The nearest Holocene-active fault is the Mohawk Valley Fault 8.4 miles southwest of the property boundary. Several unnamed inactive normal and right-lateral faults are mapped within two miles of the property. The age of last displacement for most of these faults is unknown and most are not precisely mapped. No faults are mapped within 1 mile of the site.
3.3 Topography
Elevations within the project site range between 5040 and 5700 feet above mean sea level (MSL). Current topography is shown on Figure 3-4.
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3.4 Soil Types
A Custom Soil Survey Report for Sierra, Plumas and Lassen Counties produced by the USDA was used to characterize soils at the proposed site (see Appendix C). Sand and silt are found in varying proportions that consist of well-drained soils with a mix of ashy material on the volcanic uplands. Soils are on mountain uplands and rolling hills. The Natural Resources Conservation Service (2019) identified eleven soil types within the project boundary. Soil thickness varies considerably from none (exposed bedrock) to thick (60 inches). Soil septic ratings and permeability vary with location and depth of profile within the soil units, but are generally high. Runoff potential is high to very high depending on the steepness of the terrain while ponding potential is very low. Soil descriptions and associated properties are summarized in Table 3-2.
3.5 Natural Resources
A Biological Resources Assessment was completed for the project area and is included as Appendix D. As part of the assessment, a reconnaissance-level site survey was conducted to define site-specific vegetation types within the project area. In addition, a baseline botanical survey was completed.
3.5.1 Terrestrial Biological Resources
Vegetation at the project site has been identified via the California Department of Fish and Wildlife’s (CDFW) Vegetation Classification and Mapping Program (VegCAMP) data and field surveys as eastside pine, sagebrush, annual grassland, montane chaparral, barren, and montane hardwood as shown on Figure 3-5.
The site is predominantly an eastside pine forest. An aspen stand is located at the southern end of the site. Annual grassland comprises the groundcover within eastside pine habitat. Sagebrush occurs onsite as an understory plant within eastside pine habitat, but stands of sagebrush habitat are absent from the proposed mining area. The typical structure and composition of habitat types that were observed onsite are described below.
Eastside Pine Eastside pine habitat can occur as a pure pine stand or as a mixed forest that includes an oak or juniper understory. Ponderosa pine (Pinus ponderosa) is often the dominant pine species with less representation by Jeffrey pine (Pinus jeffreyi), lodgepole pine (Pinus contorta), white fir (Abies concolor), incense cedar (Calocedrus decurrens), California black oak (Quercus kelloggii), and juniper (Juniperus sp.). An open stand of low shrubs and a grassy herb layer are typical. The pine canopy within this habitat is open which allows for light, wind, and rain to reach the understory. The understory composition includes Idaho fescue (Festuca idahoensis), bluebunch wheatgrass (Pseudoroegneria spicata), and bottlebrush squirreltail (Elymus elymoides). This habitat occurs throughout approximately 200 acres of the mine site. North aspects support a higher density of trees compared to the remainder of eastside pine habitat on the site.
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Table 3-2 SOIL TYPES Depth to Restrictive Soil Slope Feature Typical Profile Unit Soil Unit Name % Acres (inches) Permeability (inches BGS) 0-37:Sandy loam 115 Chaix-Holland 2-50 6.6 45-49 High 37-45: Gravelly sandy loam families complex 45-60: Paralithic bedrock 0-37: Sandy loam Chaix-Wapi families High to very 119 2-30 178.6 22-49 37-45: Gravelly sandy loam complex High 45-60: Paralithic bedrock 0-37: Sandy loam High to very 120 Chaix-Wapi families 30-50 67.4 22-49 37-45: Gravelly sandy loam High complex 45-60: Paralithic bedrock Chaix-Wapi families 0-37: Sandy loam High to very 124 Haplaquolls 2-30 21.0 22-49 37-45: Gravelly loamy sand High complex 45-60: Paralithic bedrock Delleker-Fugawee 0-7: Coarse sandy loam Moderately 143 familes-Rubble land 10-70 0.3 0-60 7-25: Gravelly sandy loam High to High complex 25-60: Gravelly sandy clay loam Felton-Waterman Moderately 0-10: Sandy loam 156 families-Rock 2-60 109.4 16-29 High to very 10-25: Gravelly sandy loam outcrop complex High 25-60: Unweathered bedrock 0-10: Stony loamy sand Haypress-Bucking High to very 10-20: Very gravelly loamy sand 190 10-70 28.4 27-39 families complex High 20-35: Coarse sand 35-60: Paralithic bedrock 0-10: Very stony loamy sand Haypress-Toiyabe High to very 10-20: Very gravelly loamy sand 194 30-50 50.3 17-39 families complex High 20-35: Coarse sand 35-60: Paralithic bedrock 0-9: Cobbly coarse sandy loam 236 Portola family 10-70 75.4 30-34 High 9-30: Coarse sandy loam 30-60: Paralithic bedrock 0-3: Gravelly loamy sand Wapi-Chaix families High to very 299 10-50 37.8 18-22 3-18: Gravelly coarse sand complex High 18-28: Unweathered bedrock 0-3: Gravelly loamy sand Wapi-Chaix families High to very 300 50-85 161.4 18-22 3-18: Gravelly coarse sand complex High 18-28: Unweathered bedrock
Annual Grassland This habitat is characterized as a moderate to dense herbaceous layer dominated by annual grasses and forbs. Areas of annual grassland are dominated by introduced annual grasses and forbs, including yellow star-thistle (Centaurea solstitialis), wild oats (Avena fatua), ripgut brome (Bromus diandrus), soft brome (Bromus hordeaceus), and cheatgrass (Bromus tectorum). Stands of annual grasses typically adjoin and can occur as understory plants in the canopied habitats. Annual grassland occurs in the understory within the eastside pine habitat throughout the site.
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Barren Barren habitat is defined by the absence of vegetation. Any habitat with less than two percent total herbaceous vegetation cover or less than ten percent cover in forest or shrub-dominant communities is considered to be barren. Urban settings that have been developed or graded that meet these vegetative cover criteria are also considered to be barren habitat. This occurs in the surrounding area where an existing seven-acre surface mine site currently operates. Roadways for the proposed mine site will be built within this barren area. Barren areas, although void of vegetation, can provide habitat for birds, mammals, and reptiles. Due to the current mining operations onsite, this area is not a high-quality habitat area for any special-status species or other wildlife or plant species.
Aspen Aspen stands are typically composed of clones representing one or more genetic lines. They vary from a few stems on less than 2.5 acres to thousands of stems on 50 acres or more. Associated subdominant tree species may include willows, alders, black cottonwood, ponderosa pine, and fir species. In communities near climax, however, quaking aspen is conspicuously the dominant species in the canopy. Important understory shrubs include sagebrush, roses, snowberry, western chokecherry, and western serviceberry. Forbs are usually more abundant than grasses and sedges. Aspen located at this site will be protected.
3.5.2 Special-Status Plants and Wildlife
Special-status species identified by the California Natural Diversity Database (CNDDB), California Native Plant Society (CNPS), and California Wildlife Habitat Relationships (CWHR) database searches and literature review were evaluated for their potential to occur within the project area. CNDDB occurrences within five miles of the site are shown on Figure 3-6. Potential for occurrence was based on habitat requirements and proximity to known recorded occurrences of a species.
Special-status species that are known to occur, or have the potential to occur, within the project area include:
Northern goshawk (Accipiter gentilis) Great gray owl (Strix nebulosa) American badger (Taxidea taxus) Silver-haired bat (Lasionycteris noctivagans) Long-legged myotis (Myotis volans) Yuma myotis (Myotis yumanensis) Sierra Nevada red fox (Vulpes vulpes necator) North American porcupine (Erethizon dorsatum) Western bumble bee (Bombus occidentalis)
No special-status wildlife species were detected or observed during field surveys. Measures to avoid and minimize potential impacts to special-status species and their habitat are included in the Biological Resources Assessment.
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3.6 Surface and Groundwater Characteristics
3.6.1 Surface Water
There are a few topographic depressions with intermittent water from snowmelt. The USGS National Hydrography Dataset shows it as an intermittent stream that runs through the currently active 7.5-acre mine (Figure 3-7). No other known surface waters are present onsite. No stream bank or channel was observed at this location during the site visit. Grizzly Creek is located about a mile to the east of the site. An unnamed tributary to the Middle Fork Feather River is located half a mile to the east of the site. Beneficial uses identified in Middle Fork Feather River are municipal and domestic supply (MUN), power (PWR), contact recreation (REC-1), non- contact recreation (REC-2), cold habitat (COLD), spawning (SPWN), and wildlife habitat (WILD). This river is impaired for unknown toxicity. Mining activity at this site will not contribute to the unknown toxicity of this water way. The site will apply for coverage under the General Permit for Stormwater Discharges Associated with Industrial Activities (Order 2014- 0057-DWQ). A Stormwater Pollution Prevention Plan (SWPPP) has been prepared for the site and is attached as Appendix F.
3.6.2 Groundwater
A preliminary survey of groundwater wells monitored by the Department of Water Resources (DWR) showed one well within a one-mile radius and three wells within a six-mile radius of the site (Figure 3-8; Table 3-3). Survey results have limited data available. The first well site located in Portola is west of the mining site and is inactive. Water wells historically are 70 feet below the surface. The closest wells from the table below show that groundwater could be expected from around 60 to 100 feet below the surface.
Table 3-3 DWR WELL INFORMATION Total Depth Distance Depth to Water Years of Site Code ID from Site Location Status (feet) (feet) Record 398247N1204755W001 1 mile Portola inactive 100 70 2006-2007 398380N1204231W001 2 miles Grizzly Ranch inactive 60 35 2006-2008 398169N1203573W001 4 miles Beckwourth inactive 37.5 8 1990-1998 397116N1202884W001 6 miles Sierra Valley inactive 98.8 2 1980-1995
According to the groundwater exchange website for California water basins, the prioritization for the Humbug Valley basin, where the project site is located, is considered low to very low. At the rate of usage of 50 gpm or an average of 50,000 gallons per day usage, this site is proposing, it should not have an impact on the Humbug Valley water basin. This should not affect the recharge potential or diminish groundwater supplies.
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3.7 Climate
3.7.1 Precipitation
Precipitation data from the Portola station with a period of record from 1915 to 2016 report an average of 17 to 22 inches of rain per year and snowfall ranging from 60 to 66 inches per year. 80 percent of this precipitation falls between November and March. Precipitation is summarized in Table 3-4.
3.7.2 Evaporation
Evapotranspiration (ETO) was estimated for Plumas County using data from https://cimis.water.ca.gov/Content/pdf/CimisRefEvapZones.pdf The data is included in Table 3-5.
Table 3-4 PRECIPITATION SUMMARY (inches) Month Rain Snow Jan 3.7 16 Feb 3.3 13.8 Mar 2.8 9.9 Apr 1.3 2.9 May 1 0.7 Jun 0.6 0 Jul .3 0 Aug 0.3 0 Sep 0.4 0.1 Oct 1.2 0.3 Nov 2.2 4.7 Dec 3.4 12.2 Average 20.7 inches 60.6 inches
Table 3-5 PLUMAS COUNTY EVAPOTRANSPIRATION (inches per month ) Month Monthly Average Jan 1.24 Feb 1.96 Mar 3.10 Apr 4.80 May 6.51 Jun 7.80 Jul 8.99 Aug 7.75 Sep 5.70 Oct 3.72 Nov 1.80 Dec 0.93 Total Yearly Average 54.3
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3.7.4 Temperature
Summers are warm and arid. The average summer temperature is between 75oF and 83oF with lows ranging around 52oF. Average winter temperatures range from 24oF to 41oF. Winds are light and elevation changes rapidly within a ten-mile radius of the city of Portola.
3.7.5 Design Storm
SMARA requires design calculations for the site to be completed for the 20-year, 24-hour storm event. The 20-year storm event was not available; the next closest year available is the 25-year event. As a reference, the 100-year, 24-hour storm is 5.76 inches. https://hdsc.nws.noaa.gov/hdsc/pfds/pfds_map_cont.html
3.7.6 Wind Rose
Wind data is available from the Quincy - Portable California- Wind Frequency Table. https://raws.dri.edu/cgi-bin/rawMAIN.pl?caCQUP Average wind directions shift from the northeast to the northwest with most wind activity during September through November. Wind speed usually averages less than 5 mph.
3.8 Air Quality
The project site is located within the Mountain Counties Air Basin, regulated by the Northern Sierra Air Quality Management District (NSAQMD). Plumas County is in attainment or unclassified for all federal Ambient Air Quality Standards (AAQS) with the exception of PM10 in the Portola Valley. The Portola Valley is currently designated as non-attainment for PM2.5 and PM10 based on state standards administered by the California Air Resources Board (CARB). The Portola Valley operates under the Portola Fine Particulate Matter Attainment Plan prepared by NSAQMD and approved by CARB. The County’s largest sources of fine particulate matter are wood burning for heating and prescribed burning.
The NSAQMD has permitting authority over the proposed project. The District was contacted to determine what permitting requirements would apply to the proposed project. The material excavated at the proposed project site would be processed onsite using portable equipment. The applicant will need to obtain an “Authority to Construct” (ATC) from the District followed by a “Permit to Operate” (PTO). The amount of material that the plant would be able to process yearly would be regulated by the District as part of the PTO. Any portable equipment, such as internal combustion engines that would remain in one stationary location for more than six months, would also be covered under the PTO. For such equipment, the facility would be required to list the equipment and the expected hours of operation.
3.9 Hours of Operation
The site will operate on average five days a week from 6:00 a.m. to 6:00 p.m., and will operate and haul approximately 240 days per year. During limited periods, the site will operate 24 hours
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per day to meet Caltrans nighttime work requirements. This is estimated to be for four to five projects a year and approximately 60 total days.
The mine is anticipated to operate in response to specific local projects and is not anticipated to operate full time. As such, there will be periods up to months in duration of non-operation.
3.10 Utilities and Services
The agencies in the following list provide public or private services or utilities to the project site:
Fire Protection: Eastern Plumas Rural Fire Protection District Law Enforcement: Plumas County Sheriff’s Department Electricity: Plumas-Sierra Rural Electric Cooperative (generators may also be used) Natural Gas: Propane by Private Contractor Wastewater: Portable toilets Solid Waste: Intermountain Disposal Water: Well
3.11 Other Permits
Waste Discharge Requirements RWQCB (for washing) Industrial General Stormwater Permit RWQCB Authority to Construct (and Operate) Air Pollution Control District
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4.0 EXCAVATION AND MINING PLAN
4.1 Excavation and Mining Overview
The project site encompasses approximately 715 acres, of which approximately 256 acres will be affected by mining and processing activities. The remaining acres will serve as setback areas and buffers from surrounding properties and support habitat for wildlife.
Proposed mining operations will follow the guidelines established by SMARA and will conform to the monitoring schedule established by the Plumas County Planning Department. The site will be mined in different phases taking approximately 50 years to complete. Phasing is shown on Figures 4-1, 4-2, 4-3A, 4-3B, 4-3C, 4-3D . Mining operation will begin after County approval of the Use Permit and Reclamation Plan; expected completion is by 2072. It is recommended that this not be a condition of the permit.
4.2 Materials to be Mined
Overburden on the site varies in nature depending on its location, but is generally a mix of decomposed granite and poorly developed topsoil. In the course of proposed mining operations, overburden will be removed, stockpiled, and used in support of site reclamation.
To the extent possible, overburden will be moved directly to its final planned location immediately after excavation. If stockpiling is necessary, stockpiles will be managed to minimize water and wind erosion. Any stockpiles will receive an application of mulch and seed to stabilize the slope. If stockpiled, the topsoil will be clearly identified to distinguish the topsoil material. Stockpile areas are shown on Figure 4-4.
Materials mined onsite would consist exclusively of aggregate (sand and gravel). Aggregate mined on the site would be washed, crushed, screened and graded and then used in the production of asphalt.
Materials will be removed using excavators and dozers. Some limited blasting may be required.
4.3 Mining Operation Plan
4.3.1 Operation Overview
Setbacks and other areas of non-mining operation for the site are shown on Figure 2-3.
Another factor that will determine the amount of material to be removed is the quantity and quality of the aggregate in the gross excavated material. Generally, the maximum depth will be at ground surface level of the existing site. The elevation of the bottom of the excavation will be approximately 5040 feet above MSL. Slopes of excavation will be benched at 1.5:1 at completion.
The total volume of material moved per day will fluctuate with seasonal demand. Up to 6,000 tons of material may be removed daily with a maximum annual removal of up to 350,000 tons.
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The operating season will be approximately 240 days, but may be greater or fewer depending on projects. A total of approximately 33.9 million cubic yards will be mined over the course of 50 years.
Due to potential fill slopes exceeding 2:1, a Geotechnical Report has been completed (Appendix E). Upon study of the structural geology and geotechnical conditions, kinematic stability analyses, and rock mass stability analyses of the project area, quarry slope design meet Factor of Safety thresholds.
Based on results from the kinematic evaluations and limit-equilibrium analyses, it is recommended the following bench geometries for the quarry:
Maximum bench height: 40 feet Minimum bench width: 30 feet Maximum design bench face angle: 80 degrees Maximum overall slope angle: 63 degrees
Operational considerations included in the Geotechnical Report include: controlled blasting, geotechnical monitoring, and bench scaling. Controlled blasting methods will facilitate steeper final quarry slopes. Detailed geological mapping should be performed following creation of new benches but at a frequency no longer than quarterly to annually. It is also important that benches be kept clear and that the bench faces be maintained regularly. By reducing the volume of material to be controlled, bench widths can be minimized.
The upper quarry slope face should be inclined no steeper than 1.5:1 (H:V) when exposing soil and 1:1 when exposing intensely to moderately weathered rock materials.
4.3.2 Phases and Volumes
The site will be mined in four phases (Figure 4-1). Phase I is near the area of the current mining and processing site. At the end of Phase I, the Phase II area will be mined, then Phase III, and then Phase IV. Estimated volume by phase is shown in Table 4-1. Mining phases are shown on Figures 4-3A to 4-3D. Each phase will move further back into the quarry area.
Table 4-1 ESTIMATED QUARRY VOLUMES BY PHASE Phase Volumes Acres (cubic yards) (cumulative) Phase I 4,340,000 31 Phase II 3,250,000 52 Phase III 7,900,000 95 Phase IV 18,425,000 226 Total 33,915,000
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The mining and excavation of each phase will begin with the removal of the topsoil and overburden material. All salvageable topsoil will be removed as a separate layer. This material will be used immediately for reclamation in previously mined areas or stockpiled for future use.
The mining type used will be quarrying. Blasting is not anticipated and, if required, would be limited to one to two times per year.
The mining operation will result in dust that will be controlled through the use of water trucks or dust suppressants.
Soil may be imported to assist with reclamation. These reclamation materials will not include asphalt or concrete or other non-inert construction debris. The quantities of materials will not increase truck traffic onsite and will generally be handled as backhaul from a project site to the mine site.
4.3.3 Transportation
Truck volumes will be estimated from scale data. Based on truck trip data from other Hat Creek Construction sites, “no hauling” (i.e. no truck trips) will occur on approximately 100 days for each year. Fewer than 10 trucks will leave the site on approximately 150 days per year, and the truck trips over 150 trips per day amount to less than 2 percent of the total truck traffic. Based on these data, the estimated project condition is an average of 16 one-way truck trips per day (32 round-trip truck trips) and a maximum of 350 one-way truck trips per day (700 round-trip truck trips). Travel will be from the site to Highway 70.
A Caltrans traffic study was conducted https://gisdata-caltrans.opendata.arcgis.com/ September 30, 2019, near mile post 46 on Highway 70 that recorded the average daily traffic at 3,450 vehicles a day and truck traffic was recorded at 206 trucks per day.
Much of the maximum truck trips will occur during nighttime hours to meet the new Caltrans construction requirements for nighttime non-peak period work, so will be off-peak daytime traffic loads.
4.3.4 Employees and Equipment Use
Employees will operate various types of equipment and machinery onsite. The equipment to be used for the mining and excavation of materials will generally be diesel-powered, hydraulically operated wheel and track-mounted machines. Power for the crushing equipment is anticipated to be supplied onsite by Plumas-Sierra Rural Electric Cooperative. Generators may be used periodically. The following equipment may be used on the project site:
Water truck for dust control; Front-end loaders to feed the crusher and load trucks; Excavator to harvest raw material from extraction areas; Off-highway trucks to transport raw material from extraction areas to the processing area;
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Self-loading scraper to remove and transport overburden; Track dozer to level fill; Cone crusher Wash screen Conveyors, stackers, and bins Asphalt plant Lime mix plant One 75-foot truck scale One scale office trailer
Approximate locations of this equipment are shown on Figure 4-4. A centralized processing plant is proposed to reduce traffic and dust generation. Tracked equipment will be parked in the area designated for processing or material storage when not in use. Personnel cars will be parked at the entrance area during working hours. Daily fueling, maintenance (lubing), and repairs for all equipment will take place at the processing facility. Minor occurrences of breakdowns may occur that require equipment to be repaired away from the processing facility.
4.3.5 Processing Plant Operations
Processing plant operations would include the stockpiling of aggregate, loading of raw aggregate into conveyor chutes, washing the aggregate, sorting and crushing the aggregate to market specifications, and placement into stockpiles or onto hauling trucks for delivery. In general, the proposed mining operations would normally occur between the hours of 6:00 a.m. and 6:00 p.m., Monday through Saturday, with occasional need to operate during nighttime hours in periods of peak demand. Some contracts, such as Caltrans, require nighttime paving that would take place approximately 5 weeks per year. During those times, the plant would operate 24 hours per day.
Loaders would deliver raw, mined aggregate to the plant chutes, which would then carry the aggregate into a jaw crusher. Aggregate would then enter a cone crusher, followed by screening and washing into its final form for delivery via hauling trucks.
Asphalt plant operations would include the asphalt plant and lime mixing plant. The asphalt plant and crusher will be portable and moved into the site for specific projects.
Haul trucks would generally deliver aggregate processed at the Portola Aggregates site to nearby road construction projects. The preliminary project traffic analysis assumes that the transport of aggregate excavated and processed will occur as follows:
Hauling will occur on varying days per year with a maximum of 240 days per year; Approximately 90 percent of the processed aggregate will be hauled to nearby project sites and approximately 10 percent will be hauled to the open market;
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4.3.6 Water Usage
Approximately 50,000 gallons of water per day would be used for washing the aggregate and for dust suppression at maximum production. The number of operating days per year will vary. Wash water will be recycled from the wash-water pond. Onsite water will be supplied by a well. Upon closure of the site, the well will be abandoned in accordance with California state standards.
4.3.7 Drainage Plan
The site will be graded to direct water to a detention pond located at the south end of the processing area. The detention pond will contain stormwater to allow the settling of solids. Water will be discharged from the pond to ditches and drainages below the site, hence to a greenbelt then onto Grizzly creek which is located about a mile to the east of the site then into an unknown tributary and then to the Middle Fork Feather River located half a mile to the east of the site. Drainage is shown on Figure 4-5.
The site will apply for coverage under the General Permit for Stormwater Discharges Associated with Industrial Activities (Order 2014-0057-DWQ). A Stormwater Pollution Prevention Plan (SWPPP) has been prepared for the site. (See Appendix F) Stormwater discharges will meet the Numeric Action Levels (NAL) contained in Order 2014-0057-DWQ.
4.3.8 Pollution Prevention
The source for pollution onsite would be the fuels and oils used for equipment. The maximum amount of fluids stored onsite will be 10,000 gallons of fuel in an aboveground storage tank and approximately five 55-gallon drums containing lubricants and transmission oil. Storage of fuels and oils would comply with the state guidelines for pollution prevention. The vehicles and equipment used in the operation would be maintained to prevent any possible leaks. Major repairs, other than emergency repairs, will be conducted at an offsite facility. Onsite drainage will be designed to stay on the site and erosion control measure would be used to control offsite erosion; therefore, offsite drainage of potential leaks from operations would not occur.
The Portola Aggregates mining project will require the use of petroleum-based products for onsite equipment. These products include oils, diesel fuel, and lubricants and are classified as potentially hazardous. Hazardous materials, such as diesel fuel, will be stored and managed according to applicable federal, state, and local regulations. All uses involving the storage and handling of hazardous materials are monitored by the Plumas County Environmental Health Department. Local, state, and federal regulations for use and handling of hazardous materials associated with the project will reduce impacts to the public and the environment. A Hazardous Material Business Plan and a Spill Prevention, Control, and Countermeasures (SPCC) Plan will be prepared for the project following reclamation plan approval if required.
Portable toilets will be provided onsite and serviced/pumped at regular intervals. Domestic waste generated by workers at the site will be disposed of in trash cans with lids or a dumpster. Solid waste will be picked up by a disposal service.
No mine waste generation is anticipated.
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4.3.9 Dust and Noise Control
Water trucks will be used during the mining operation to control dust created by vehicle movement.
The potential sources of noise on the site will be from the operation of the heavy equipment and processing plant. Mobile machinery and equipment used on the site would be fitted with noise suppression mufflers in accordance with the applicable Federal, State, and local regulations. The processing plant would use Teflon-coated aggregate chutes to reduce noise levels. Other measures that could be used to mitigate for noise could include noise curtains installed around operating equipment, trucks operating within the property using strobe lights rather than warning beepers, and berms. Noise mitigation measures would be implemented to the extent necessary to ensure that noise levels would remain within Plumas County and Mine Safety and Health Administration (MSHA) standards.
Specifically, trees and other vegetation will be retained between the site and nearby residences. Mine phasing has been developed to provide buffers to nearby residences. Berms (topsoil and product) will be used between residences and equipment.
Based on noise studies conducted for other projects, the following levels are anticipated for portions of the project as shown in Table 4-2.
In addition, truck traffic noise levels (at an estimated 75 feet from roadway center line) are anticipated to be between 47 and 51 dBA Ldn on low-use days and 58 to 60 dBA Ldn on maximum truck trip days.
4.3.10 Public Safety
Fencing and signage would be installed to limit public access to the site. Future development surrounding the project site will increase public exposure to onsite hazards. Therefore, as future development occurs, additional public safety measures would be installed to prevent public entry to the site.
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Table 4-2 HAT CREEK INDIVIDUAL OPERATIONS NOISE LEVELS Sound Level Operation Location Leq Lmax Source Photo Sand Plant 100 feet 66.6 dBA 74.8 dBA Loader
Crushing 200 feet 85.6 dBA 88.7 dBA Crushers- Ops Loaders
Asphalt Plant Center of 85.6 dBA 87.5 dBA Plant – Site, Diesel 50 feet from Generator. burner Note that 40 feet from primary noise generator source is generator – not plant.
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5.0 RECLAMATION PLAN
5.1 Reclamation Process
5.1.1 Overview of Reclamation Process
The site encompasses approximately 715 acres of which approximately 256 acres will be disturbed for aggregate removal or used for processing activities. The remainder of the acreage will remain as agricultural preserve. In accordance with SMARA requirements, this Reclamation Plan identifies the means by which the areas disturbed by proposed mining activities will be restored for beneficial use. Reclamation activities would create habitat consistent with eastside pine vegetation. The revegetation plan contained herein also includes provisions for the enhancement and preservation of areas of existing habitat that would be undisturbed by mining activities.
Reclamation of the project site will be carried out whenever possible concurrently with proposed mining activities.
5.1.2 Schedule
The schedule for interim and final reclamation will be driven by the volume of material excavated during the proposed mining phases. Interim reclamation areas would be established after several years when mining activities would be completed or at the completion of a phase. Monitoring will be conducted on the interim reclaimed areas and final reclamation during the appropriate seasons. Reclamation of the project site, including monitoring activities, would be complete within three years of cessation of mining activities.
5.2 Engineering Data
5.2.1 Final Slope of Project Area
A Geotechnical Report for site development is included as Appendix E. Planned final slopes will be 1.5:1 with 30-foot benches.
5.2.2 Reclaimed Land Use
The final use of the site will be agricultural preserve.
Upon completion of mining operations, all machinery, waste, scrap, and excess materials would be dismantled and removed from the site. All materials would be recycled or taken to the nearest appropriate landfill. After removal, the ground beneath the former processing facility and access roadways will be ripped and deep-tilled to eliminate soil compaction from the facility and road use. The ground will be graded per mine plan sheets and revegetated. Topsoil will be redistributed in a stable and uniform thickness consistent with the Ag Preserve use and test plots.
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5.2.3 Erosion and Drainage Control
Erosion will be controlled during each mining and reclamation phase. Overburden piles and soils in the mining areas exposed to wind and storm conditions will be hydro-seeded. A seed mixture will be selected so that germination occurs rapidly in the disturbed native material or stockpiled overburden.
Drainage control will occur through grading of areas to ensure water is conveyed to the detention pond. Slopes surrounding the mining area will also direct drainage to the detention pond prior to discharge offsite. Any erosion control measures will be designed for not less than a one-hour/twenty-year intensity storm event (per SMARA).
The final site topography was shown previously and illustrates the slopes of the ground within the mining area and the adjacent undisturbed portions of the site. This final grading of the project site will create slopes and contours that maintain the drainage to the settling pond from areas previously disturbed by mining and reclamation activities.
The site will be covered by the Industrial General Permit (Order 2014-0057-DWQ). A SWPPP has been developed for the site. The applicant will conduct inspections to ensure that the SWPPP Best Management Practices are being implemented and that the above measures are properly controlling erosion and sedimentation in disturbed areas.
5.3 Revegetation Plan
The eastside pine habitat comprises the largest portion of the project site. The quarry floor will be restored to eastside pine forest habitat. Slopes and benches will be seeded with a native grass and forb mix.
5.4 Revegetation Plan and Design
5.4.1 Objectives
The final end use for the mining site is agricultural preserve. This revegetation plan is specifically designed to provide for the creation of high-quality wildlife habitat that is representative of the character of the surrounding areas and of the property.
5.4.2 Baseline Studies
Baseline studies for vegetation cover, density, and species richness were conducted on November 5, 2019. The studies followed Division of Mine Reclamation (DMR) protocol for conducting vegetation surveys. Surveys were completed within the eastside pine habitat which occurs throughout the site. Methods were repeated via systematic sampling in order to achieve greater than 80 percent confidence in results.
The eastside pine reference site was surveyed for cover, density, and species richness using 50- meter transects. The initial transect location was determined by random point projection using a
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GPS device. Subsequent transects were spaced 5 feet apart and placed end to end in order to fit sampling replicates within the eastside pine habitat. Line intercept methods were used to determine perennial cover (mean = 52.71 percent cover). Plot method was used to determine perennial plant density (mean = 17 perennial plants/50m2) and species richness (mean = 4 perennial plant species). The plot was a 50 m2 area defined by a 1-meter wide corridor along the west side of the 50-meter transect. Perennial percent cover, density, species richness, and species inventory of plants observed along transects within the eastside pine habitat reference site are included in Tables 5-1 through 5-3.
Table 5-1 PERENNIAL % COVER DATA Plot % Cover 1 38 2 48 3 68 4 54 5 68 6 64 7 42 8 46 9 88 10 62 11 44 12 52 13 42 14 22 AVG % Cover 52.7
Table 5-2 DENSITY AND SPECIES RICHNESS Density Species Plot (stems per 50 m2 plot) Richness 1 25 4 2 15 5 3 18 4 4 21 5 5 28 4 6 16 3 7 8 5 8 9 4 9 19 4 10 26 4 11 4 5 12 22 3 13 -- 4 14 5 2 AVG (rounded) 17 4
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Table 5-3 PLANT SPECIES INVENTORY WITHIN PLOTS TOTAL PERENNIAL SPECIES LIST Common Name Scientific Name Jeffrey Pine Pinus jeffreyi Ponderosa Pine Pinus Ponderosa Incense Cedar Calocedrus sp. California Black Oak Quercus kelloggii Antelope Bitterbrush Purshia tridentata Prostrate Ceanothus Ceanothus prostrates Manzanita Arctostaphylos sp. Threadleaf Fleabane Erigeron filifolius Cheatgrass Bromus tectorum Bottlebrush Squirreltail Elymus elymoides California Wild Oat Avena fatua
This revegetation plan is designed to restore the wildlife habitat quality of the site and the aesthetic value of the area post-mining. Habitat communities selected and their respective revegetation designs are based upon the biological characteristics of the project site and surrounding areas, site topography, and the commodity being mined (aggregate). Plant species diversity within each designed habitat community was selected to complement the existing/preserved habitats onsite and while providing greater opportunities for utilization by wildlife. It is anticipated that the final elevations will be one of the primary factor determining which vegetation is most appropriate for a given area. Where appropriate, a diverse mix of plant species that vary in the eastside pine habitat will be seeded in areas likely to experience fluctuating changes in arid climates.
The eastside pine vegetation community is dominated by species found in the eastside pine forest, which are relatively drought-tolerant species. Plant species to comprise the reclaimed eastside pine habitat includes ponderosa pine (Pinus ponderosa), Jeffrey pine (Pinus jeffreyi), California black oak (Quercus kelloggii), antelope bitterbrush (Purshia tridentata), sagebrush (Artemisia tridentata), and bottlebrush squirreltail (Elymus elymoides). Jeffrey pine, ponderosa pine, and black oak will be planted. Bitterbrush, sagebrush, and squirreltail are anticipated to seed in following reforestation. Planting specifications for eastside pine forest species are included in Table 5-4.
Table 5-4 PLANTING SPECIFICATIONS FOR EASTSIDE PINE SPECIES Common Name Botanical Name Type Size Quantity Jeffrey Pine Pinus jeffreyi Plug 8 cc 100/acre Ponderosa Pine Pinus ponderosa Plug 8 cc 20/acre California Black Oak Quercus kelloggii Plug 8 cc 5/acre
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5.5 Plant Procurement and Installation Procedures
The planned plant materials to be used are seeds and container-grown plants. Ponderosa pine, Jeffrey pine, and black oak will be grown as plugs for planting using locally collected seed and will be planted on the reclaimed base elevation. Benches and slopes will be seeded and hydro- mulched using a native seed blend.
All planting efforts will occur between October and April. For this to occur, scheduling of revegetation efforts will include time for the collection of seeds and grow-out of those species in the nursery. This will require at least a two-year lead time.
Contingent upon the results of the test plot study, amendments to soil prior to or during the time of planting may be required. The addition of organic matter, such as compost, may greatly benefit the restoration site.
5.6 Planting Seeds (Grasses)
Naturalized annual and perennial grasses are likely to colonize much of the area post-mining, especially due to their dominance on the project site. However, several native species will be planted to increase native plant diversity. Seeding will be carried out in the fall, after the first wetting rain moistens the ground.
Seed will be ordered from a reputable supplier that collected or grew out seed from a source as close to the project site as possible. Seed will be properly labeled as genus, species, subspecies, variety, and source and will be handled and packed in a manner that ensures the purity and viability of the materials. Weed seed will not exceed 0.5 percent of the pure live seed and inert material. Seeding rates will be given in pounds of pure live seed (PLS) per acre. The seed mix will be measured and packaged by the seed supplier.
Prior to seeding, planting areas will be lightly disked or harrowed, if necessary, to loosen the soil. Proper seed-soil contact is a necessity. If areas are compacted, ripping or disking may be required. Benches and slopes will be hydro-seeded with tackifier added.
Grass seed recommendations are summarized in Table 5-5.
Table 5-5 REVEGETATION GRASS SEED RECOMMENDATIONS Species Name Scientific Name Unit Volume Price/Source Idaho fescue Festuca idahoensis PLS 5* Great Basin Seeds: $8.95/lb. Bluebunch wheatgrass Pseudoroegneria spicata PLS 10* Great Basin Seeds: $7.95/lb. Bottlebrush squirreltail Elymus elymoides PLS 7* Great Basin Seeds: $18.95/lb. *Subject to change based on application rate of seed mix versus individual recommended seed rates
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5.7 Planting of Containerized Seedlings
Propagated stock grown from seed collected onsite, or from adjacent or nearby areas, will be used for eastside pine habitat creation. No more than 30 percent of any individual plant or cluster of individuals will be harvested for propagation. Should seed be limited for desirable species, container stock of those species will be purchased.
Vegetative species to be planted will be healthy, vigorous, well formed, and free from disease, windburn, and environmental stress. Plants will be randomly staggered within their respective planting zones to avoid straight rows and to create naturally appearing plant associations. Adjustments to the planting design will be made as determined necessary to meet field conditions.
Planting will be completed in the spring, after soil temperature begins increasing. If weed species are present within the planting area, a circle at least 3 feet in diameter around each planting location will be cleared of all vegetation prior to plant installation. Compacted soil at the bottom and sides of the hole will be loosened. Plants will be placed in the planting holes so that the crown of the plant is at ground level. Excavated soil will be used to fill the bottom of each hole to achieve the proper planting level and to backfill the remaining space around the root ball.
Herbicides will be used to control competing vegetation and non-native weeds and grasses.
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6.0 MAINTENANCE DURING THE MONITORING PERIOD
Maintenance of the reclaimed sites during the early stages of plant establishment is essential to the attainment of reclamation objectives and performance criteria. Revegetation areas will be maintained in good condition through regular monitoring to detect problems before they affect the attainment of performance criteria. Maintenance measures include invasive species control, erosion control, irrigation system maintenance, herbivory control, trash removal, and habitat protection. Each of these issues is addressed separately in the following maintenance plan.
6.1 Invasive Species
Cheatgrass (Bromus tectorum), a non-native invasive annual grass species, is currently a common understory plant onsite. No invasive plants will be included in the revegetation palette for the site. Areas planted with native species will be weeded as needed using the best available method. Herbicide treatment or manual or mechanical removal may be required.
The percent cover of invasive plants will be monitored and maintained as needed to meet the performance success standards which stipulate that invasive plants are not to exceed ten percent of the total vegetative cover. The percent of total vegetative cover will be the average value among the vegetation transects.
6.2 Herbivory Control and Habitat Protection
If necessary to ensure the success of reclamation efforts, herbivore damage to young plants will be controlled. Methods of herbivory control will be selected based on the herbivore species causing the damage, the plant species needing protection, and other situation-specific circumstances. Due to the level of recreation in the surrounding area, signs will be posted around reclaimed areas indicating that the surrounding area is a sensitive resource area and should not be disturbed.
6.3 Monitoring Period
Monitoring by a qualified professional will be conducted following completion of habitat creation until performance criteria have been met for two consecutive years having no human intervention. Corrective or remedial actions will be undertaken if success criteria are not attained in a given monitoring year.
Vegetation surveys will be conducted once annually when dominant vegetation has matured and both early and late season species can be correctly identified. Surveys will be conducted by a professional experienced in undertaking field surveys and knowledgeable of plant taxonomy and ecology. The results of vegetation surveys will be used to compare site conditions over the maintenance and monitoring period. Revegetation success monitoring will utilize sufficient sample size to determine an 80 percent confidence level.
Habitat will be evaluated by direct counting of planted species. The number of plants sampled will be suitable to attain 80 percent confidence in data results. Individual trees and shrubs will also be inspected for percent survival, health, weed competition, herbivory, drought stress, and
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other factors. Density, percent cover, and species richness will also be evaluated. Because of the slower growth rates of shrub and tree species, canopy cover in this community will not be evaluated. The five-year monitoring period will focus on perennial plant density instead of the percent canopy cover to determine whether these species will continue to mature into a self- sustaining vegetation community.
6.4 Monitoring Report
Monitoring data will be included in an annual report prior to site closure.
6.5 Performance Criteria
Performance criteria have been developed for each habitat community created. Should the evaluation of performance criteria reveal that revegetated areas are significantly behind in their target percentages, the reasons for insufficient plant germination and/or growth will be determined and appropriate remedial actions will be undertaken to meet the established criteria.
Remedial actions could include planting additional material of the species or substitutions of other species better suited to the sites failing to attain desired performance criteria. Remedial actions will be applied to all areas requiring them, not merely to the monitored plots.
Tree and shrub species will maintain an 80 percent survival of the initial plantings in year 1, 70 percent in year 2, and 60 percent in years 3 to 5. If survival drops below these numbers, plants will be replaced the following winter; Establish a minimum species richness of three native tree/shrub species in three years; Average density of 10 perennial plants within three years as quantified within 50 square meter plots; Invasive exotic species will not compose greater than an average of 10 percent of the vegetative cover across the site in any year.
P:\Projects\2013\71305 Hat Creek Construction\Portola Pit at Carmichael Trust Property\Reclamation and Mining Plan Application\PortolaAggregates_Reclamation Plan_110920.docx 28 DocuSign Envelope ID: 1C49A055-BEDD-48E0-8740-79CA7EEE2F71
7.0 RECLAMATION RESPONSIBILITY
7.1 Financial Assurance
A financial assurance estimate and the estimated reclamation costs will be prepared by the project applicant and submitted to the County following approval of the Reclamation Plan.
7.2 Statement of Responsibility
“I, the undersigned, hereby agree to accept full responsibility for reclaiming all mined lands described and submitted herein with any modification requested by the administering agency as conditions of approval.”
9 Signed this _____ day of ______,November 2020.
______Perry Thompson, Owner TLT Enterprises, Inc.
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Figures
SITE LOCATION
FIGURE 2-1 Miles GENERAL SITE LOCATION 0 2 4 8 PORTOLA AGGREGATES PLUMAS COUNTY, CALIFORNIA P:\GIS\71305\Portola-Carmichael\Figures\ReclamationPlan\71305_GeneralSiteLocation.mxd Reclamation Boundary
Approximate Parcel Boundary
FIGURE 2-2 Feet USGS TOPOGRAPHIC MAP 0 1,000 2,000 4,000 PORTOLA AGGREGATES SOURCE: USGS 7.5' TOPOGRAPHIC MAP, PORTOLA QUADRANGLE PLUMAS COUNTY, CALIFORNIA P:\GIS\71305\Portola-Carmichael\Figures\ReclamationPlan\71305_USGS-Topo.mxd
Reclamation Boundary General Forest (GF) Periphery Commercial (C-2)
Approximate Parcel Boundary Light Industrial (I-2) Recreation Open-Space (Rec-OS)
Agricultural Preserve (AP) Mining (M) Secondary Suburban (S-3)
City of Portola Multiple-Family Residential (M-R) Single-Family Residential (2-R)
Suburban (S-1) FIGURE 3-1 Feet 0 1,000 2,000 4,000 ZONING PORTOLA AGGREGATES SOURCE: USGS 7.5' TOPOGRAPHIC MAP, PORTOLA QUADRANGLE PLUMAS COUNTY, CALIFORNIA P:\GIS\71305\Portola-Carmichael\Figures\ReclamationPlan\71305_Zoning.mxd
Inferred Fault Lines Known Fault LIne Q: Quaternary alluvium and marine deposits (Pliocene to Holocene) Tv: Tertiary volcanic flow rocks, unit 17 (Cascade Range) (Tertiary (2-24 Ma)) Tvp: Tertiary pyroclastic and volcanic mudflow deposits, unit 9 (Cascade Range) (Tertiary (2-24 Ma)) grMz: Mesozoic granitic rocks, unit 3 (Sierra Nevada, Death Valley area, Northern Mojave Desert and Transverse Ranges) (Permian to Tertiary; most Mesozoic) Reclamation Boundary Approximate Parcel Boundary FIGURE 3-3 Miles 0 0.5 1 2 GEOLOGY PORTOLA AGGREGATES SOURCE: USGS 2014; DOC 2018 PLUMAS COUNTY, CALIFORNIA P:\GIS\71305\Portola-Carmichael\Figures\ReclamationPlan\71305_Geology.mxd
Annual Grassland Montane Hardwood Reclamation Boundary
Barren Sagebrush Approximate Parcel Boundary
Eastside Pine Urban
Montane Chaparral FIGURE 3-5 Feet HABITAT CLASSIFICATIONS 0 750 1,500 3,000 PORTOLA AGGREGATES SOURCE: USFS 2019 PLUMAS COUNTY, CALIFORNIA P:\GIS\71305\Portola-Carmichael\Figures\ReclamationPlan\71305_CWHR.mxd flammulated owl prairie falcon
flammulated owl Sheldon's sedge lens-pod milk-vetch North American porcupine great gray owl
sticky pyrrocoma
northern goshawk North American porcupine silver-haired bat great gray owl
Sierra Nevada red fox North American porcupine sticky pyrrocoma
Sierra Valley ivesia sticky pyrrocoma sticky pyrrocoma
Sierra Valley ivesia
silver-haired bat Yuma myotis sticky pyrrocoma
willow flycatcher sticky pyrrocoma sticky pyrrocoma Santa Lucia dwarf rush Sierra Valley ivesia sticky pyrrocoma sticky pyrrocoma Sierra Valley ivesia sticky pyrrocoma western bumble bee prairie falcon Nevada daisy Plumas ivesia Plumas ivesia sticky pyrrocoma willow flycatcher greater sandhill crane lens-pod milk-vetch Plumas ivesia sticky pyrrocoma greater sandhill crane lens-pod milk-vetch Sheldon's sedge lens-pod milk-vetch sticky pyrrocoma greater sandhill crane sticky pyrrocoma greater sandhill crane Sheldon's sedge Sierra Nevada yellow-legged frog sticky pyrrocoma lens-pod milk-vetch Sheldon's sedge American badger Plumas ivesia lens-pod milk-vetch Sheldon's sedge lens-pod milk-vetch lens-pod milk-vetch Plumas ivesia sticky pyrrocoma
Spotted Owl Observation Location Reclamation Boundary
CNDDB Occurrence 1-Mile Buffer Around Potential Project Area
5-Mile Buffer Around Potential Project Area
FIGURE 3-6 Miles CNDDB OCCURRENCES 0 1.25 2.5 5 PORTOLA AGGREGATES SOURCE: CDFW CNDDB JUNE 2020 PLUMAS COUNTY, CALIFORNIA P:\GIS\71305\Portola-Carmichael\Figures\ReclamationPlan\71305_CNDDB.mxd Perennial Stream Reclamation Boundary
Intermittent Stream Approximate Parcel Boundary
Ephemeral Stream
Feet FIGURE 3-7 0 1,000 2,000 4,000 HYDROLOGY PORTOLA AGGREGATES SOURCE: USGS 2020 PLUMAS COUNTY, CALIFORNIA P:\GIS\71305\Portola-Carmichael\Figures\ReclamationPlan\71305_Hydrology.mxd 398578N1204411W001 398581N1204392W001
398530N1204404W001
398387N1204229W001 398380N1204231W001
398247N1204755W001
DWR Groundwater Monitoring Well Within 2 Miles of Property Boundary
Reclamation Boundary
Approximate Parcel Boundary
Miles FIGURE 3-8 0 0.5 1 2 DWR GROUNDWATER WELLS PORTOLA AGGREGATES SOURCE: DWR WATER DATA LIBRARY 2020 PLUMAS COUNTY, CALIFORNIA P:\GIS\71305\Portola-Carmichael\Figures\ReclamationPlan\71305_DWR-GroundwaterWells.mxd
Appendix A Current Reclamation Plan
Appendix B Visual Quality Analysis
Appendix C NRCS Soils Report
Appendix D Biological Resources Assessment
Appendix E Geotechnical Report
Appendix F SWPPP