2025-11-14_PERMIT FILE - M2025056 ‎(30)‎

• Permit No: M2025056
• IBM Index Class Name: Permit File
• Doc Date: 11/14/2025
• Doc Name Note: Attachment 4 Stormwater Management Plan
• Doc Name: Application
• From: Highbury Resources Inc
• To: DRMS
• Email Name: DMC
• Email Name: THM
• Media Type: D
• Archive: No

JD-8 Mine Stormwater Management Plan
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TABLE OF CONTENTS
1. DESCRIPTION OF MINING ACTIVITIES 1
2. AREA SUBJECT TO EFFLUENT LIMITATIONS GUIDELINES 1
3. SITE MAP I
4. STORMWATER MANAGEMENT CONTROLS 2
4.1 SWMP Administrator 2
4.2 Identification of Potential Pollutant Sources 2
4.3 Stormwater Structural Controls and Best Management Practices(BMPs) 3
4.3.1 Stormwater Diversion 3
4.3.2 Materials Handling and Spill Prevention 3
4.3.3 Sediment and Erosion Prevention 3
4.3.4 Other Pollution Prevention Measures 4
4.4 Preventive Maintenance 4
4.5 Good Housekeeping 4
4.6 Employee Education 5
5. IDENTIFICATION OF DISCHARGES OTHER THAN STORMWATER 5
41. 6. COMPREHENSIVE INSPECTION 5
6.1.1 Inspections 5
6.1.2 Maintenance 6
6.1.3 Record-keeping 6
7. REFERENCES 6
LIST OF TABLES
Table 1. Routine Site Activities and Conditions Having the Potential to Affect Stormwater 3
LIST OF FIGURES
Figure 1. Site Map Showing Potential Sources and Structural Controls to Reduce Potential Loading to
Stormwater 7
LIST OF ATTACHMENTS
Attachment A. Drainage Plan
Attachment B. JD-8 Mine Stormwater General Inspection Checklist
4122A.I I060 I Cotter Corporation
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