2016-07-14_PERMIT FILE - M2016010 ‎(4)‎

• Permit No: M2016010
• IBM Index Class Name: Permit File
• Doc Date: 7/14/2016
• Doc Name: Adequacy Review Response
• From: Transit-Mix Concrete Co.
• To: DRMS
• Email Name: AME
• Media Type: D
• Archive: No

Transit Mix Concrete Co.
11. Comment: As recommended in Section 6.3 of the Norwest Geotechnical Assessment- Rev.
B, dated January 26, 2015,please commit to submitting a plan to divert surface water runoff
around the pit walls.
Response: See Transit Mix memorandum included in Exhibit 6.5.
12. Comment: As recommended in Section 6.3 of the Norwest Geotechnical Assessment- Rev.
B, dated January 26, 2015,please commit to submitting a plan to install instrumented
groundwater monitoring wells behind the highwalls where natural topography continues
above the pit crest.
Response: See Transit Mix memorandum included in Exhibit 6.5.
13. Comment: As recommended in Section 6.3 of the Norwest Geotechnical Assessment - Rev.
B, dated January 26, 2015,please commit to additional geotechnical investigations to
determine if adversely dipping low angle faults are present.
Response: See Transit Mix memorandum included in Exhibit 6.5.
14. Comment: As recommended in Section 6.3 of the Norwest Geotechnical Assessment- Rev.
B, dated January 26, 2015,please commit to routine monthly bench face mapping by
qualified personnel to assess the rock mass quality and structural geology against design
assumptions throughout quarry development.
Response: See Transit Mix memorandum included in Exhibit 6.5.
15. Comment: As recommended in Section 6.3 of the Norwest Geotechnical Assessment- Rev.
B, dated January 26, 2015,please commit to routine visual inspection of the pit slopes by
qualified personnel to identify blast damage and modify blasting techniques as required.
Response: See Transit Mix memorandum included in Exhibit 6.5.
16. Comment: As recommended in Section 6.3 of the Norwest Geotechnical Assessment- Rev.
B, dated January 26, 2015, please commit to routine pit slope movement monitoring with
EDM/Prism surveying, laser scanning, and/or extensometers.
Response: See Transit Mix memorandum included in Exhibit 6.5.
17. Comment: As recommended in Section 6.3 of the Norwest Geotechnical Assessment- Rev.
B, dated January 26, 2015, please commit to routine daily visual inspections by qualified
personnel to assess pit slope stability, catchment benches, berms, clean-up efforts, restricted
access points and monitoring systems.
Response: See Transit Mix memorandum included in Exhibit 6.5.
Hitch Rack Ranch Quarry(M-2016-010)
Response to Comments—July 14, 2016