2020-07-06_REVISION - M1984041

• Permit No: M1984041
• IBM Index Class Name: REVISION
• Doc Date: 7/6/2020
• Doc Name: Request For Amendment To Permit
• From: American Gypsum Co.
• To: DRMS
• Type & Sequence: AM4
• Email Name: SJM
• Email Name: THM
• Media Type: D
• Archive: No

2019 Plan of Operations Modification American Gypsum Company, LLC
TABLE OF CONTENTS
INTRODUCTION ..........................................................................................................................1
Summary of Proposed Modifications.........................................................................................1
1.0 GENERAL INFORMATION ...............................................................................................3
1.1 General...........................................................................................................................3
1.2 Type of Mining................................................................................................................5
1.3 Mining History.................................................................................................................6
1.4 General Description........................................................................................................7
1.5 Operator Information ......................................................................................................7
1.6 Claim Information ...........................................................................................................8
1.7 Inspection Contact..........................................................................................................8
2.0 RESOURCE PROTECTION MEASURES.........................................................................9
2.1 Cultural and Paleontological Resources (CPR)..............................................................9
2.2 Fish, Wildlife, and Plant Habitat (FWPH)........................................................................9
2.3 Air Quality (AQ) ..............................................................................................................9
2.4 Soils and Water Resources (SWR) ..............................................................................10
2.5 Survey Monuments (SM)..............................................................................................10
2.6 Fire ...............................................................................................................................10
3.0 OPERATIONAL AND BASELINE ENVIRONMENTAL INFORMATION ........................11
3.1 Air Quality.....................................................................................................................11
3.2 Climate and Hydrology.................................................................................................11
3.3 Geology and Soils ........................................................................................................12
3.3.1 Geology.................................................................................................................12
3.3.2 Soils.......................................................................................................................13
3.4 Cultural Resources.......................................................................................................14
3.5 Paleontology.................................................................................................................14
3.6 Vegetation ....................................................................................................................14
3.6.1 Relationship of Vegetation to Soil Types...............................................................15
3.7 Fish and Wildlife...........................................................................................................15
3.8 Socioeconomics ...........................................................................................................16
4.0 FINANCIAL WARRANTY................................................................................................17
Am Gypsum Poo Mod ISSD 20190909 September 2019 N