PERMFILE135766

• Permit No: C1980001A
• IBM Index Class Name: Permit File
• Doc Date: 10/24/2006
• Section_Exhibit Name: Table of Contents
• Media Type: D
• Archive: Yes

Volume 11 Page
•
4. 6 HYDROLOGIC BALANCE CONTROL PLAN
4. 6-1 Year 5 - Subwatershed Time of Concentration and
Routing Hydrograph from Subwatershed Outlet to
a Structure 4. 6-3
9. 6-2 Year 5 - Hydrograph Routing Between Junctions and
Structures 4. 6-13
4. 6-3 Conservation Practice Factors 4. 6-14
4. 6-4 Hydrologic Classifications of Soil Types 4. 6-17
4. 6-5 Curve Numbers of Subwatersheds 4. 6-18
4. 6-6 Year 20 - Subwatershed Time of Concentration
and Routing Hydrograph from Subwatershed
Outlet to a Structure 4. 6-19
4. 6-7 Year 20 - Hydrograph Routing Between Junctions
and Structures 4. 6-27
4. 6-6 Pond Volume and Elevation Specifications 4. 6-31
4. 6-9 Emergency Spillway Calculations for
Moffat Area Pond 4. 6-36
4. 6-10 Determination of Particle Size Distribution
• of Sediment Inflow 4. 6-36
4 .6-11 Diversion Ditches for Moffat Area Sediment Basin 4. 6-37
4. 6-18 Total Soil Loss by Area in Acre-Feet 4. 6-65
4. 6-19 Example Calculation for Soil Group C
Center Ridge/Aspen Woodland 4. 6-66
4 .6-20 Individual Calculations for Soil Groups 4. 6-67
4 .6-21 Hydrologic Classifications of Soil Types 4. 6-72
4 .6-22 Curve Numbers in Mining and Reclamation Sequence 4 .6-73
4 .6-23 Summary Runoff - Acre/Feet 4 .6-75
4 .6-24 Example Calculation of Rainfall Runoff 4 .6-76
4 .6-26 Runoff from Acres 4 .6-77
4 .6-26 Storage Needs from Pumping 4 .6-83
4 .6-27 Total Storage Volume of Sediment Pond 4 .6-84
4 .6-26 Storm Design 4 .6-85
4 .6-29 Storm Design 4 .6-93
. 4 .6-30 Calculation for Existing Emergency Spillway for
West Ridge Road 4 .6-97
MR-37 TOC-23 October 6, 1996