PROJ00173

• Contract/PO #: C153369
• Contractor Name: St. Vrain and Left Hand Water Conservancy District
• Water District: 0
• County: Boulder
• Bill Number: XB 99-999
• Loan Projects - Doc Type: Feasibility Study

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6.4.1
6.4.2
6.5
6.6
6.7
6.8
6.9

SECTION 7.

Figure 1.
Figure 2.
Figure 3.
Figure 4.
Figure 5.
Figure 6.
Figure 7.

Table 1.

Cone lusions ............................................
RecolTlTlendations ........................................
Reservoir Seepage .........................................
Earthwork Factors .........................................
Reservoir Slope Stability.................................
Type of Dam ...............................................
Summary of Recommendations ................................

,
CITED REFERENCES ..........................................

FIGURES AND TABLES

6- 3
6- 4
6- 8
6-10
6-11
6-12
6-15
7- 1

Site Plan and Location ...................................... 2- 2
Generalized Bedrock Geology................................. 4- 3
Fault Pattern along Front Range ............................. 5- 4
Nomograph--Richter Magnitude Determination .................. 5-12
Map 6 - 200 Year Recurrence Interval........................ 6- 5
Map 7 - Maximum Intensity: 200 Year Recurrence Interval.... 6- 6
Map 8 - Return Period of Intensity VIII...................... 6- 7

Abridged Modified Mercalli Intensity Scale .................. 5-13

APPENDIX A. FRACTURE MAPPING
Section A-I. Summary of Procedures ............................. A- 1
Section A-2. Field Findings .................................... A- 2
Section A-3. Data Analysis ..................................... A- 2
Section A-4. Location Descriptions ............................. A- 3
Section A-5. Traverse Descriptions ............................. A- 4
Section A-6. Explanation of Symbols on Data Sheets ............. A-12
Section A-7. Rock Hardness ..................................... A-14

Figure A-1. Equal Area Net Projections, Joint Attitudes ....... A-15

APPENDIX B. STATISTICAL EVALUATION OF FRACTURE DATA
Section B-1. Methods of Evaluation ............................. B- 1
Section B-2, Calculation of Rock Quality Index (RQD) ........... B- 2
Section B-3. Analysis of Fracture Orientation .................. B- 3
Section B-4. E~timat~on of Permeability........................ B- 4

Section B-5. D1Scusslon ........................................ B- 5
Section 8-6. Cited References .................................. 8- 6

Figure B-1. Stereographic Projections ......................... B- 9

Figure B-2. Joint Sets ........................................ 8-10
Figure B-3. Wilson's Stereograms .............................. B-11
Figure 8-4. Wilsonls Stereograms .............................. 8-12

Table 8-1. Cluster No.1..................................... B- 7
Table B-2. Cluster No.2..................................... B- 7
Table B-3. Cluster No.3..................................... 8- 8

APPENDIX C. GEOPHYSICAL REPORT

APPENDIX D. DRILLING AND CORING REPORT

Section 0-1. Drilling Summary.................................. 0- 1
Section 0-2. Well Completion ................................... 0- 1

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