2008-04-22_PERMIT FILE - C1981017

• Permit No: C1981017
• IBM Index Class Name: PERMIT FILE
• Doc Date: 4/22/2008
• Section_Exhibit Name: Master Table of Contents
• Media Type: D
• Archive: No

COAL BASIN MINE PERMIT APPLICATION
MID-CONTINENT RESOURCES, INC.
• _ CARBONDALE, COLORADO
ATTACHMENT II-B-App.7-4
ROCK TUNNEL AREA
DRAINAGE CONTROL PLAN
TABLE OF CONTENTS
Section Subject Pa es
A Description of Rock Tunnel Area Water Control
Structures 1-2
B M-K Rock Tunnel Sediment & Drainage Contro l
Structures 3-6
1. Methods
2. Design
C
• ~ Rock Tunnel Sedimentation Pond Calculations 7-14
1. General data
2. Sub area drainage data
3. Precipitation data
4. Runoff-type II storm
5. Discharge - type II storm
6. Pond design
7. Sediment yield
8. Pond design criteria
D Geo-Hydro Pond Specifications 15-19
E Technical Revision - NeW Tunnel Mine Discharge Ponds ZO-44
LIST OF FIGURES
Number Subject Page
1 Site Plan - Coal Basin Mine Area 4
2. M-K Drainage and Sediment Control 5
3 Portal and Yard Area Cross-sections 10
4 Channel Relocation Cross-section 11
5 Pipe Removal Diagram 12
6 Temporary Sediment Pond Design 13

.. •,
-- ~ - - ~ _,,a~Y..