PERMFILE56724

• Permit No: C1994082
• IBM Index Class Name: Permit File
• Doc Date: 9/27/2007
• Doc Name: 10-Year, 24 Hour SEDCAD Demonstration
• Section_Exhibit Name: Tab 13 Attachment 13-3A.2 Addendum 13-3A-A
• Media Type: D
• Archive: No

YOAST MINE
Pond 10 System
HYDROLOGIC INPUT PARAMETERS
SEDCAD 4
WATERSHED ID
Structure 9 - SW51
Watershed -Channel YPM-21A
Watershed Area:
7.6
Curve Number:
VEGETATION HYDROLOGIC CURVE AREA
WATERSHED TYPE COVER SOIL GROUP NUMBER acres
Reclaimed Fair (30°~<x<70%) B 71 7.6
Total 7.6
CURVE NUMBER 71
Cwve number (CN) values used are approved Yoast Mine values (see Table 13-12.1). Values were
adapted from Urban Hydrology for Small Watersheds, Technical Release No. 55 (TR-55), Soil Conservation
Service, 1986.
SEDCAD 4
WATERSHED ID
Structure 9 - SWS1
Watershed - Channef YPM-21A
Watershed Area:
7.6
Sedimentology
k Factor and Control Factor
VEGETATION HYDROLOGIC k CONTROL AREA
WATERSHED TYPE COVER SOIL GROUP FACTOR FACTOR acres
Reclaimed Fair (30%<x<70%) B 0.16 0.043 7.6
Total 7.6
0.16 0.043

i
Revised 08107
TR-35 13-3A-A.28