2008-04-15_REVISION - M1980244 ‎(328)‎

• Permit No: M1980244
• IBM Index Class Name: REVISION
• Doc Date: 4/15/2008
• Doc Name: VOL VII APP 10 Storm Water Mgmt during Operations & for Final Reclamation and Closure
• From: CC & V
• To: DRMS
• Type & Sequence: AM9
• Media Type: D
• Archive: No

TABLE OF CONTENTS

EXECUTIVE SUMMARY ......................................................................................1
SCOPE ................................................................................................................. 3
STORM WATER HYDROLOGY .......................................................................... 4
Background and Prior Drainage Designs ....................................................................................................4
Methodology and Basin Descriptions ..........................................................................................................4
Inflow Design Storms and Design Criteria ..................................................................................................5
Runoff Coefficients ........................................................................................................................................5
Hydrology Calculations for Design Storms (SEDCAD4) ...........................................................................6
STORM WATER MANAGEMENT AREA DESCRIPTION AND RESULTS OF
STORM ROUTING ............................................................................................... 7
During Operations .......................................................................................................................................7
Post Closure Arrangement ..........................................................................................................................8
Hydrology Results ...............................................................................................:....................................10
Diversion Design and Preliminary EMP Pond Design .............................................................................12
Sediment Removal Efficiency and Performance ......................................................................................13