2016-05-17_REVISION - C1982056 - Laserfiche WebLink

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TWENTYMILE COAL, LLC - FOIDEL CREEK MINE (C-1982-056) MR16-296 9 -EAST UTILITY BOREHOLES TECHNICAL ADEQUACY RESPONSES (05/16) 2.04.4 — Cultural and Historical Resources, 2.05.6(4) Protection of Historic Resources: I Proposed revised page 2.04-9.2, does 170t follow with the preceding page. It appears this page is missing formation that was added with PRI 1. Please revise the page as necessary and review this page and insure it follotirs iritli the preceding and following page. 2. Included trith the submittal was a Class III Cultural Resource Inventory report prepared by Metcalf Archaeological Consultants dated August 2015. This report, herein called the Metcalf Report, is to be added to Exhibit 6T based on the sanninary of'revisions and additions sheet submitted with 111R296. The Metcalf Report is a duplicate of'the report that is already included in Exhibit 6L that ivas added to the perinit with the approval o f' NIR2S9. Given this, it does not appear it is necessary to add this report to Exhibit 6T. Please revise page 2.05-45.30 to cite that the Alelt:4' Report is included in Exhibit 6L and dated August 2015 to differentiate it JI -0/17 other surreys caa•rentlY included in Exhibit 6L. Also please provide an updated coversheet for Exhibit 6L to indicate that it includes the AIR296 survey area. 3 According to the Metcalj Report, Site 5RT3325 and 5RT3324 are eligible to be listed on the National Register of'Historic Places (NRHP). Site 5RT3325 is located within the disturbed area ij'the Option 43 drill pad is constructed. Given this, the statement made on proposed revised page 2.04-9.2 that the proposed project will not impact identified cultural resources is not accurate and will need to be revised. TC will need to revise their plan or remove Option 93 in order to avoid disturbing this site. Avoidance of the site or farther testinglinitigatiot of'the site is recommended by Metcalf'Archaeological Consultants on page 21 of the Metcalf Report. 4 In a letter dated September 8, 2015 fi-onn Eduard Nichols the State Historic Preservation Officer (SHPO) that was sent to the Division regarding MR289, PRIO and PRII, SHPO agreed that sites 5RT3324 and 5RT3325 are eligible for listing on the NRHP. In accordance lrith Rule 2.05.6(4)(b), please provide a protection plan J61- the 5RT3325 site in section 2.05.6(=1) of the permit located on page 2.05-171. Response: The referenced pages have been reviewed and revised for continuity, and to include a reference to the previously provided survey report and cover sheet. Given that the Option 3 location encroaches on an identified cultural resource site, TC has reviewed and eliminated this option. The relevant text has been reviewed and revised to eliminate references to Option 3. Copies of revised text and maps accompany these responses. 2.04.9 Soils Resource Information 5. The proposed affected area for the 9 East Borehole is outside of boundaries of the know soil resources found at the site depicted on Map 17 and discussed in section 2.04.9 of the permit. For the proposed affected area, please provide the info7'11101i077 required by Rade 2.04.9. Response: The current NRCS soil survey and soil descriptions for the project area have been reviewed and a copy of the NRCS soil mapping for this area is provided for placement as a supplement to the existing soils map. The relevant text in Section 2.04.9 has been reviewed and updated, as appropriate, to address the soils in this area. Copies of revised text and maps accompany these responses. 2.05.3(4) — Ponds, Impoundments, other treatment facilities and diversions 6. Based on the information presented in the proposed Exhibit 49EE the structure details associated tirith proposed diversion ditches 1, 2, and 3 were completed without freeboard. There was no discussion in the provided text or design to serve cis a justification not to include freebourd in the proposed ditch designs. Per Rule 4.05.3(7)(6), diversion design shall incorporate freeboard no less than 0.3 feet. Please provide detail