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For Contractors - I-90 Project Information

I-90 Project Phase 1C Information

Existing DTM Surfaces

Proposed DTM Surfaces

Proposed Alignments

Cross Sections

        Addendum #1 Cross Sections

        Addendum #3 Cross Sections

        Addendum #6 Cross Sections

        Proposed Alignments

         Staging Alignments 

Avalanche Reports

Geotech Information

Phase 1C Roadway Geotechnical Engineering Report

Slide Curve Rock Slope Design

Phase 1C Slope Engineering Report

Crystal Springs Stockpile Site

I-90 Project Phase 1B Information

Geotechnical Reports

I-90 Project Phase 1A Information

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