I-90 Project Phase 1C Information

• Movable Rockfall Barrier (MRB) - Assembly and Drawing (pdf 988 kb)
• Existing Snowshed As Built Drawings (pdf 2 mb)
• Project Temporary Erosion and Sediment Control (TESC) Narrative (pdf 416 kb)
• Aerial Map (pdf 98.20 mb)
• Aerial Map Printing Instructions (pdf 487 kb)

Existing DTM Surfaces

• Exist_DTM_02
• Exist_DTM_03
• Exist DTM Crystal Springs

Proposed DTM Surfaces

• Addendum #3 DTM
• LE DTM
• LW DTM
• AE DTM
• AW DTM
• Slide Curve Bridge Work Bench AR1
• Snowshed Work Bench AR6
• Rock Cut Overburden DTM
• Snowshed Pier 1 Cut DTM
• Crystal Springs DTM
• Resort Creek DTM
• Fill Existing Resort Creek DTM
• Upper Resort Creek DTM
• Upper Resort Creek Haul Road DTM
• Townsend Creek DTM
• Sunset Highway DTM
• Stage 1 DE11
• Stage 1 DW11
• Stage 2 DE12
• Stage 2 DW12
• Stage 3 DE13
• Stage 3 DW13
• Stage 4 DE14
• Stage 4 DW14
• Stage 5 DE15
• Stage 5 DW15

Proposed Alignments

• Addendum #3 ALG
• I-90 Proposed Alignments
• I-90 Staging Alignments
• I-90 Wall Alignments
• Crystal Springs Alignment

Cross Sections

        Addendum #1 Cross Sections

• LE X-section Addendum #1 (pdf 1.85 mb)
• LW X-section Addendum #1 (pdf 1.87 mb)

        Addendum #3 Cross Sections

• DE13 X-section Addendum #3 (pdf 7.11 mb)
• DW13 X-section Addendum #3 (pdf 9.73 mb)
• DE14 X-section Addendum #3 (pdf 4.89 mb)
• DW14 X-section Addendum #3 (pdf 4.69 mb)
• DE15 X-section Addendum #3 (pdf 15.10 mb)
• DW15 X-section Addendum #3 (pdf 15.20 mb)

        Addendum #6 Cross Sections

• DE11 X-section Addendum #6 (pdf 3.17 mb)
• DE13 X-section Addendum #6 (pdf 1.60 mb)
• DW11 X-section Addendum #6 (pdf 433 kb)
• DW12 X-section Addendum #6 (pdf 323 kb)
• DW13 X-section Addendum #6 (pdf 2.55 mb)
• LE X-section Addendum #6 (pdf 282 kb)
• LW X-section Addendum #6 (pdf 316 kb)

        Proposed Alignments

• AE X-section (pdf 3.00 mb)
• AW X-section (pdf 5.50 mb)
• LE X-sections (pdf 13.90 mb)
• LW X-sections (pdf 20.40 mb)

         Staging Alignments 

• Slide Curve Bridge Work Bench AR1 (pdf 2.45 mb)
• Snowshed Work Bench AR6 (pdf 2.37 mb) 
• Stage 1 DE11 (pdf 10.60 mb)
• Stage 1 DW11 (pdf 8.73 mb)
• Stage 2 DE12 (pdf 8.08 mb)
• Stage 2 DW12 (pdf 8.59 mb)
• Stage 3 DE13 (pdf 7.14 mb)
• Stage 3 DW13 (pdf 7.43 mb)
• Stage 4 DE14 (pdf 4.73 mb)
• Stage 4 DW14 (pdf 4.48 mb)
• Stage 5 DE15 (pdf 14.10 mb)
• Stage 5 DW15 (pdf 13.20 mb)

Avalanche Reports

• Snow Net Design Recommendations (pdf 9.11 mb)
• Avalanche Mitigation Report 2007-2012 (pdf 7.62 mb)
• Swiss Technical Guidelines for Avalanche Starting Zones (pdf 1.60 mb)

Geotech Information

• Phase 1C Bore Logs (pdf 23.90 mb)
• Phase IC Rock Slopes Memorandum (pdf 1.77 mb)
• Tech Memo Overburden Slope Stabilization Analysis (pdf 228.00 kb)

Phase 1C Roadway Geotechnical Engineering Report

• 1C Roadway Geotechnical Engineering Report (pdf 1.40 mb)
• 1C Roadway Figures (pdf 31.3 mb)
• 1C Roadway Appendix A - Boring and Test Pit Logs (pdf 6.90 mb)
• 1C Roadway Appendix B - Rock Core and Test Pit Photographs (pdf 21.60 mb)
• 1C Roadway Appendix C - Geophysical Surveys (pdf 8.70 mb)
• 1C Roadway Appendix D - 2008-2010 Field and Laboratory Testing Data (pdf 8.20 mb)
• 1C Roadway Appendix E - Est. Rock Mass Strength Properties and Eval. Rock Mass Structure (pdf 2.70 mb)
• 1C Roadway Appendix F - Snowshed Statistical Reliability Analysis (pdf 153.00 kb)
• 1C Roadway Appendix G - Selected Preliminary Design Drawings (pdf 2.85 mb)
• 1C Roadway Appendix H - Stability and Liquefaction Analysis Graphical Results (pdf 5.50 mb)
• 1C Roadway Appendix I - ADSC Recommendations (pdf 144.00 kb)
• 1C Roadway Appendix J - Slide Curve Median Wall FLAC Model (pdf 330.00 kb)
• 1C Roadway Appendix K - Phase 1C PS&E Support (pdf 2.24 mb)

Slide Curve Rock Slope Design

• Slide Curve Rock Slope Design Report (pdf 2.00 mb)
• Slide Curve Rock Slope Design Figures (pdf 15.00 mb)
• Slide Curve Rock Slope Design Appendices (pdf 56.00 mb)

Phase 1C Slope Engineering Report

• 1C Rock Slope Report (pdf 4.27 mb)
• 1C Rock Slope Figures (pdf 27.30 mb)
• 1C Rock Slope Appendix A - Sirovision Reports (pdf 6.93 mb)
• 1C Rock Slope Appendix B - Structural Data (pdf 411.00 mb)
• 1C Rock Slope Appendix C - Borehole Logs (pdf 3.74 mb)
• 1C Rock Slope Appendix D - Core Photographs (pdf 19.30 mb)
• 1C Rock Slope Appendix E - PLT Data (pdf 128.00 kb)
• 1C Rock Slope Appendix F - COBL Data (pdf 22.20 mb)
• 1C Rock Slope Appendix G - Installs (pdf 4.31 mb)
• 1C Rock Slope Appendix H - Laboratory Testing (pdf 46.40 kb)
• 1C Rock Slope Appendix I - Persistent Discontinuities (pdf 662.00 kb)

Crystal Springs Stockpile Site

• Crystal Springs Stockpile Gradation Analysis (pdf 20.00 kb)
• Max Density Curve (pdf 1.00 mb)

I-90 Project Phase 1B Information

Geotechnical Reports

• 2006 Conceptional Geotech Report
• 2007 Roadway Geotech Report
• 2008 Roadway Geotech Report
• 2008 Materials
• Boring Logs, Overburden and Summary of Geotech Conditions
• Gold Creek Geotech Investigation and Report
• Phase 1B Rock Slope Geotech Report
• Rocky Run Geotech Report

I-90 Project Phase 1A Information

• Pit Site Report (pdf 45.50 mb) 
• Crystal Springs Detour Geotech Report (pdf 18.70 mb)