2009-09-04_PERMIT FILE - C1982056 ‎(4)‎

• Permit No: C1982056
• IBM Index Class Name: Permit File
• Doc Date: 9/4/2009
• Doc Name: MAIN NORTH INTAKE SHAFT
• Section_Exhibit Name: Exhibit 08X 6-ain North Intake Shaft Drainage Designs
• Media Type: D
• Archive: No

Table of Contents
Introduction...................................................................................................... ............................... 1
ShaftPad .......................................................................................................... ............................... 1
PerimeterDrainage Ditches ............................................................................. ............................... 2
Sediment Pond with Erodible Perimeter Drainage Ditches ............................. ............................... 2
Sediment Pond Spillway with Erodible Perimeter Drainage Ditches .............. ............................... 2
Sediment Pond Spillway Channel with Erodible Perimeter Drainage Ditches .............................. 3
HydrologicModeling ....................................................................................... ............................... 3
SEDCADModel Runs ................................................ :............................................................... 4
Summary of SEDCAD Model Results ........................................................ ............................... 5
RainfallDewatering ..................................................................................... ............................... 7
SnowmeltRunoff Discharge ........................................................................ ............................... 8
PondWater Quality Data ............................................................................. ............................... 8
CERTIFICATION........................................................................................... ............................... 8
Table of Tables
Table 1. Design Storm Information ................................................................. ............................... 3
Table 2. CN & C for Affected Areas ............................................................... ............................... 3
Table 3. Summary of Pertinent Pond Depth, Elevation, Area, and Volume Data .......................... 7
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List of Exhibits (Attached)
Exhibit 1 6MN Overall Watershed
Exhibit 2 6MN Drainage Plan
List of Appendices (Attached)
10 -Year, 24 -Hour with Pond Empty with Erodible Perimeter Drainage Ditches
10 -Year, 24 -Hour Erodible Perimeter Drainage Ditches
10 -Year, 24 -Hour Vegetated Perimeter Drainage Ditches
25 -Year, 24 -Hour Spillway Channel with Erodible Perimeter Drainage Ditches and Erodible
Spillway Channel
25 -Year, 24 Hour Spillway Channel with Erodible Perimeter Drainage Ditches and Vegetated
Spillway Channel
U
TCC 6MN Intake Shaft Facility i Water & Earth Technologies, Inc.
Drainage and Sediment Control System Design April 24, 2009