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^�n <br /> Transit Mix Concrete Co. <br /> Response: Transit Mix commits to collecting the geotechnical information and revising the <br /> geotechnical assessment with the site-specific information. Transit Mix will submit for <br /> Division review the data and results as a technical revision or amendment. <br /> 6. In the Slope Stability Model section of the analyses, the Applicant states it is assumed the <br /> F 1 footprint is cleared and grubbed prior to material placement. The stability analyses <br /> model sections E and F indicate the F1 stockpile is underlain by overburden. Please <br /> explain this discrepancy and revise the stability analyses as needed. <br /> Response: The fines stockpile is cleared and grubbed, which removes vegetation and <br /> topsoil; however, the overburden material will remain. These conditions match those in the <br /> stability analysis. <br /> 7. The Figure 1 —General Arrangement with Sections Lines map provided with the stability <br /> analyses indicates a C — C' through the proposed quarry. The Division did not receive <br /> copies of the C-C' stability analyses models. Please provide the stability models for the <br /> Division's review. <br /> Response: Figure 1 has been revised to remove cross-section C-C'. The stockpile cross- <br /> sections analyzed include E-E', F-F', G-G', and H-H'. <br /> 8. The Section F stability analyses models for Bench-scale and Phase 5 — Operational <br /> indicates the TS2 stockpile on top of the F 1 stockpile. The Mine Plan Map submitted <br /> with Exhibit C, Figure C-8, indicates the TS2 stockpile has been used to reclaim the F 1 <br /> stockpile. Please explain this discrepancy and revise the stability analyses model as <br /> needed. <br /> Response: The Section F operational conditions reflect the stockpile configuration in <br /> Phase 11. These conditions exist prior to regrading and reclamation of the lower stockpile <br /> slopes, and topsoil stockpiles TS2 and TS3 are still in place on the benches. Section F has <br /> been revised and the report updated to address this comment. <br /> 9. The Section F stability analyses models for Bench-scale and Phase 5 — Operational <br /> appears to represent the status of the F 1 stockpile in Mining Phases 3 and 4 as depicted <br /> on Mining Plan Maps Figures C-6 and C-7. The lower half of the F 1 stockpile would be <br /> reclaimed with topsoil. The topsoil layer is not indicated in the stability analyses model. <br /> Please explain this discrepancy and revise the stability analyses model as needed. <br /> Response: The Section F operational conditions reflect the stockpile configuration in <br /> Phase 11. These conditions exist prior to regrading and reclamation of the lower stockpile <br /> slopes, and topsoil stockpiles TS2 and TS3 are still in place on the benches. Section F has <br /> been revised and the report updated to address this comment. <br /> 10. The Section F stability analyses models for Bench-scale and Phase 5 — Operational <br /> indicates the TS2 stockpile as a maroon color. The Material Type key for the stability <br /> Hitch Rack Ranch Quarry(M-2017-049) <br /> Response to Comments—March 9,2018 <br />