PERMFILE128459

• Permit No: C1981014
• IBM Index Class Name: Permit File
• Doc Date: 12/11/2001
• Doc Name: Determination of Hydrologic Consequences, Simons, Li & Associates
• Section_Exhibit Name: EXHIBIT 07 Part 2
• Media Type: D
• Archive: No

r
TABLE OF CONTENTS
Page
LIST OF TABLES v
LIST OF FIGURES. .vii
LIST OF E%NIBITS .vii
I. INTRODUCTION
1.1 General 1
1.2 Scope 1
[_ 1.3 Available Information 2
r II. ADJUSTMENT OF PRELIMINARY DATA AND MULSTED CALIBRATION
• 2.1
2.2
2.3
2.4
2.5
Rainfall. 5
Growd Cover and Impervious Area. 6
Sediment Size Distribution. 6
watershed Segmentation and Geometry 6
Typographical Corrections for
Preliminary Data Base Report. 10
III. PRESENT-MINING CONDITION RESULTS
3.1 Magpie Creek Draiange 17
3.2 Newlin Creek Drainage 19
3.3 Tipple Arna Drainage. 20
IV. POST-MINING CONDITION
4.1 Magpie Creek Drainage 22
4.2 Newlin Creek Drainage 24
4.3 Tipple Area Drainage. 24
V. VERIFICATION OF RESULTS
5.1 Comparison of Regression Equations
for Peak Rwoff 27
. 5.2 Comparison of Suspended Sediment Concentrations
Entering and Leaving the Lease Area 29
5.3 Monitoring Station Data 30
5.4 water Qualiey Analysis. 30
iii