2016-07-01_REVISION - M1977141 ‎(2)‎

• Permit No: M1977141
• IBM Index Class Name: Revision
• Doc Date: 7/1/2016
• Doc Name: Engineering Stability Analysis
• From: Aggregate Industries
• To: DRMS
• Email Name: MAC
• Media Type: D
• Archive: No

TABLE OF CONTENTS

SECTION PAGE
1 INTRODUCTION.................................................................................................. 1
1.1 PURPOSE AND OBJECTIVES ................................................................. 1
1.2 SCOPE OF WORK AND AUTHORIZATION ............................................. 1
1.3 PROJECT PERSONNEL........................................................................... 2
1.4 LOCATION AND DESCRIPTION .............................................................. 2
1.5 SITE CONDITIONS ................................................................................... 3
2 GEOLOGIC CONSIDERATIONS......................................................................... 5
2.1 REGIONAL GEOLOGY ............................................................................. 5
2.2 SITE GEOLOGY........................................................................................ 6
2.3 GEOLOGIC HAZARDS.............................................................................. 6
3 SEISMICITY......................................................................................................... 8
4 FIELD INVESTIGATIONS.................................................................................... 9
4.1 GENERAL.................................................................................................. 9
4.2 FIELD MAPPING....................................................................................... 9
4.2.1 General geologic mapping .............................................................. 9
4.2.2 Detailed line surveys....................................................................... 9
4.2.3 Rock core logging ......................................................................... 12
4.2.4 3-D photogeologic mapping .......................................................... 12
4.3 LABORATORY TESTING........................................................................ 13
5 PROJECT ENGINEERING GEOLOGIC MODEL .............................................. 14
5.1 PROJECET GEOLOGIC LITHOLOGIES................................................. 14
5.2 DACITE SILLS......................................................................................... 14
5.3 GROUNDWATER.................................................................................... 15
5.4 DISCONTINUITIES/JOINT SETS............................................................ 15
5.5 UNIAXIAL COMPRESSIVE STRENGTH................................................. 16
5.6 DISCONTINUITY SHEAR STRENGTH................................................... 18
5.6.1 Shear Strength of Clean Joints ..................................................... 18
5.6.2 Shear Strength of Infilled Joints .................................................... 19
5.6.3 Shear Strength of the Fountain Formation/Sill Contact................. 20
5.7 ROCK QUALITY DESIGNATION ............................................................ 20
5.8 ROCK MASS CLASSIFICATIONS .......................................................... 21
5.9 ROCK MASS STRENGTH PROPERTIES............................................... 22
6 ROCK SLOPE DESIGN METHODOLOGY........................................................ 24
6.1 ROCK MASS DURABILITY – FOUNTAIN FORMATION......................... 24
6.2 KINEMATIC (MARKLAND) ANALYSES.................................................. 25
6.3 LIMIT EQUILIBRIUM BLOCK STABILITY ANALYSIS............................. 27
6.3.1 Potential Wedge Failures in Design Section 5 .............................. 28
6.4 GLOBAL STABILITY ANALYSIS............................................................. 28
86995/DEN8R017 Page i of iii February 2008
Copyright 2008 Kleinfelder West, Inc.