REP14161

• Permit No: M1988112
• IBM Index Class Name: Report
• Doc Date: 10/18/1993
• Doc Name: CONSTRUCTION STATUS REPORT SAN LUIS PROJECT TAILINGS DISPOSAL AREA PHASE I RAISE I
• Media Type: D
• Archive: No

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TABLE OF CONTENTS
' 1.0 INTRODUCTION ....................................... 1
' 2.0 BACKGROUND INFORMATION ............................ 3
3.0 CONSTRUCTION PROGRESS .............................. 4
3.1 Earthwork ........................................ 4
3.2 Liner 5
4.0 FIELD MODIFICATIONS ..................................
4.1 General 5
5
7R -4.2 Extent of Liner Placement .............................. 6
4.3
4.4 Subgrade,Preparation ..................................
Fill Materials 6
6
4.4.1 Embankment Raise Fill ........................... 7
' 4.4.2 Liner Cover/Drainage Blanket ::::::::::::::::::::::.
4.4.3 Liner Sub-base 7
8
4.4.4 Random Fill .................................. 9
4.5 Liner ...........................................
4.5.1 Phase 1-2 Liner Tie-In ............................ 9
9
4.5.2 Pipeline Underliner .............................. 9
' 4.5.3 Conformance Samples ............................
4.5.4 Downstream Solution Collection Ditches ................. 9
10
4.6 Reporting ........................................ 10
e 5.0 CONSTRUCTION QUALITY ASSURANCE AND QUALITY CONTROL .. 10
5.1 General ......................................... 10
5.2 Earthwork ........................................
5.2.1 Raise Fill .................................... 11
11
5.2.2 Liner Cover/Drainage Blanket Material ................. 11
...........
5.2.3 Liner Sub-base/Clay Liner Component 13
:::::::
5.2.4 Miscellaneous Fill .. , ....... 13
5.3 Liner ........................................... 13
' S.4 Tailings ......................................... 14
6.0 EVALUATION OF CURRENT CONSTRUCTION CONDITIONS ....... 15
6.1 Extent of Liner Placement .............................. IS
6.2 Subgrade Preparation ................................. 15
6.3 Dam Raise Fill ..................................... 15
' 6.4 Material Type 2 -Liner Cover/Drainage Blanket ...... ~.......... 18
6.5 Material Type 3 -Liner Sub-baselClay Liner Component ........... 22
6.6
6.7 Material Type 4 -Miscellaneous Fill .......................
Liner Issues ................. .. 22
22
6.7.1 Alteration of Phase 1-2 Liner Tie-In ................... 22
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