2007-10-30_PERMIT FILE - C1982057

• Permit No: C1982057
• IBM Index Class Name: Permit File
• Doc Date: 10/30/2007
• Doc Name: Drainge and Sediment Control Plan II-W South Extension
• Section_Exhibit Name: Tab 13 Attachment 13-5B
• Media Type: D
• Archive: No

January 2002 Seneca II-lY/ South Expansion * Drainage and Sediment Cantml Plan • TOC- i
TABLE OF CONTENTS
Section No. Page No.
1.0 INTRODUCTION ...............................................................................................................................1
2.0 HYDROLOGIC CALCULATIONS ..................................................................................................2
2.1 PRECIPITATION DISTRIBUTION .......................................................... .................................................. ~
2.2 STORM DURATION ............................................................................ ..................................................

2.3
RETURN PERIOD/PREC[PITATION ...................................................... 2
..................................................
2.4 HYDROGRAPH RESPONSE SHAPE ...................................................... .................................................. 2
2.5 DRAINAGE BASIN AREA ................................................................... .................................................. 3
2.6 TIME OF CONCENTRATION, T~ .......................................................... .................................................. 3
2.7 MUSKINGUM ROUTING PARAMETERS, K, X ..................................... .................................................. 3
2.8 CURVE NUMBER, CN ....................................................................... .................................................. 3
3.0 SEDIMENTATION CALCULATIONS .......................................... ..................................................4
3.1 RAINFALL FACTOR, R ....................................................................... .................................................. 4
3.2 SOIL ERODIBILITY FACTOR, K .......................................................... .................................................. 4
3.3 LENGTH-SLOPE FACTOR, LS ............................................................ .................................................. 4
3.4 CONTROL FACTOR, C ....................................................................... .................................................. 4
3.5 PRACTICE FACTOR, P ....................................................................... .................................................. 5
3.6 SEDIMENT PARTICLE DISTRIBUTION ................................................. .................................................. 5
4.0 PONDS ............................................................................................... .................................................. 6
5.0 HAUL ROAD CHANNEL AND CULVERT DESIGNS .................................................................. 8
6.0 REFERENCES ....................................................................................................................................9
LIST OF TABLES
Table No. Description Page No.
1 Seneca II-W (South Expansion Area) Curve Numbers ................................................... 3
2 Soil Erodibility Factor ......................................................... ................................................... 4
3 Control Factor ..................................................................... ................................................... 5
4 Practice Factor ..................................................................... ................................................... 5
5
( p ) g ry ..........................
Seneca II-W South Ex ansion Sediment Pond Desi n Summa .... 7
LIST OF FIGURES
Figure No. Description Page No.
1 Postmine Channel Design ................................................. ..................................................10
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