2024-01-31_REVISION - M1977344 ‎(3)‎

• Permit No: M1977344
• IBM Index Class Name: Revision
• Doc Date: 1/31/2024
• Doc Name Note: 1.0 Introduction and TOC
• Doc Name: Adequacy Review - Preliminary
• From: Holcim
• To: DRMS
• Type & Sequence: AM2
• Email Name: TC1
• Email Name: MAC
• Media Type: D
• Archive: No

Portland Limestone Quarries (M-1977-344) Permit Amendment-02
ii
Revised pursuant to preliminary adequacy review November 20, 2023

Table of Contents
1.0 Introduction ............................................................................................................ 6
1.1 Site Background .......................................................................................................... 6
1.2 General Project Description ......................................................................................... 6
1.3 Applicant Background .................................................................................................. 7
1.4 Application Organization .............................................................................................. 7
2.0 Regular (112) Operation Reclamation Permit Application Exhibits ........................ 9
2.1 Exhibit A: Legal Description of Permit Boundary and Affected Area Boundary (Rule
6.4.1) 9
2.1.1 Mine Entrance Coordinates ..................................................................................16
2.2 Exhibit B: Index Map (Rule 6.4.2) ................................................................................17
2.3 Exhibit C: Pre-Mining and Mining Plan Maps of the Affected Lands (Rule 6.4.3) .........19
2.4 Exhibit D: Mining Plan (Rule 6.4.4) .............................................................................67
2.4.1 Surface Description..............................................................................................67
2.4.2 Geologic Description ............................................................................................69
2.4.3 Mine Progression .................................................................................................70
2.4.4 Mine Infrastructure Development .........................................................................72
2.4.5 Mine Development ...............................................................................................73
2.4.6 Blasting Operations..............................................................................................74
2.4.7 Existing Structures ...............................................................................................74
2.4.8 Water Diversions or Impoundments .....................................................................75
2.5 Exhibit E: Reclamation Plan (Rule 6.4.5) ....................................................................84
2.5.1 Reclamation of Material Extraction Areas ............................................................84
2.5.2 Reclamation of Mine Infrastructure ......................................................................85
2.6 Exhibit F: Reclamation Plan Map (Rule 6.4.6) .............................................................87
2.7 Exhibit G: Water Information (Rule 6.4.7) ....................................................................90
2.7.1 Existing Conditions ..............................................................................................90
2.7.2 U.S. Army Corp of Engineers ...............................................................................91
2.7.3 Site Investigations and Characterization ..............................................................92
2.7.4 Potential Mining Impacts to Water Quality and Quantity .......................................95
2.7.5 Mine Water Source and Uses ..............................................................................98
2.8 Exhibit H: Wildlife Information (Rule 6.4.8) ................................................................ 100
2.8.1 Gray wolf ........................................................................................................... 100
2.8.2 Eastern Black Rail ............................................................................................. 101
2.8.3 Greenback Cutthroat Trout ............................................................................................... 101