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  1. Home
  2. Projects
  3. Studies
  4. I-70 Twin Tunnels Environmental Assessment
  5. Appendix G Tech Memos
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  • Projects
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  • Studies
    • US 24 West Finding of No Significant Impact (FONSI)
    • North I-25 PEL Study, US 36 to CO 7
    • US 34 & US 85 Interchange PEL Study
    • I-25 and Arapahoe Road/SH 88 Interchange Environmental Assessment & FONSI
    • I-25 Colorado Springs Area Finding of No Significant Impact (FONSI)
    • CO 7 Cherryvale to 75th Street EA & FONSI
    • US 34, US 287 to Larimer County Rd. 3 EA and FONSI
    • US 36 Managed Lanes - Investment Grade Traffic and Revenue Study
    • South I-25 Corridor and US 85 Corridor FEIS & ROD
    • US 6 - 24 Road to SH 139 Access Control Plan
    • US 6/River Front Road Access Control Plan in Silt
    • 2009 Disparity Study and Appendices
    • I-25 Valley Highway Environmental Impact Statement (EIS) and ROD
    • I-25, Colorado Springs to Monument Environmental Assessment
    • SH 42 Planning and Environmental Linkage Study (PEL)
    • US 40 Section 4(f) Evaluation
    • US 50 West Wills Blvd to McCulloch Blvd EA
    • US 50 West PEL Study
    • SH 60 Access Control Plan
    • SH 60 Environmental Overview Study
    • I-70/32nd Avenue Interchange Environmental Assessment
    • I-70 Mountain Corridor Mobility and Operational Assessment
    • I-70 Mountain Corridor Short Term Mobility Solutions Report
    • I-70 Reversible Lane Study
    • I-70 Reversible (Zipper) Lane Study Phase II
    • I-70 Twin Tunnels Environmental Assessment
      • Finding of No Significant Impact (FONSI)
      • Appendix G Tech Memos
        • 06 TM Historic Prop Survey Report
    • SH 88/Federal Boulevard Environmental Assessment and FONSI
    • SH 133 Carbondale Access Control Plan
    • US 160 Durango to Bayfield Final EIS
    • US 160 Durango to Bayfield ROD October 2006
    • US 285 Environmental Assessment with Appendices
    • US 287 at Lamar Environmental Assessment and FONSI
    • US 287 Loveland to Fort Collins Environmental Overview Study (EOS)
    • US 287 from CO 1 to the LaPorte Bypass EA and FONSI
    • US 385 High Plains Corridor
    • SH 402 EA and FONSI
    • C-470 Environmental Assessment & FONSI 2015
    • Denver Area Regional Bus Facility Study
    • Devolution Study Report
    • Eastern Colorado Mobility Study
    • Northwest Corridor EIS
    • Ports to Plains
    • Region 3 Intersection Priority
    • Studies & Assessments
    • CO 119 Multi-modal Planning and Environmental Linkages Study
  • Flood-Related Projects
  • Central 70
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  • Region 2 Southeastern Colorado Projects
  • Region 3 Northwestern Colorado Projects
  • Region 4 Northeastern Colorado Projects
  • Region 5 Southwestern Colorado Projects
  • CDOT Projects Overview
  • C470 - Wadsworth Boulevard to I-70 NEPA and Preliminary Design
  • I-25 (US 36 to 104th Ave) Improvements
  • CO 7 Lower (Lyons to Raymond)
  • Santa Fe Drive Action Plan- A Planning & Environmental Linkages (PEL) Study | C-470 to I-25
  • Southeastern Colorado Bridge Bundle Project
  • I-270 Corridor Improvements
  • Southeastern CO Centerline Rumble Strip Installation
  • Teller County
  • US 50 Bonforte to Avondale Resurfacing
  • Weld County ADA Ramps
  • US 285 Resurfacing between Monte Vista and Saguache
  • US 50 La Junta Microsurfacing
  • CO 82 - Paepcke Transit Hub Improvements in the City of Aspen on Main and Galena
  • Park County Chain-Up Stations
  • Eisenhower-Johnson Memorial Tunnels Infrastructure Repairs
  • ITS Installation of Road Side Connected Vehicles
  • CO 133 Bowie Chip Seal
  • CO 1 Wellington South Resurfacing
  • I-70 Median Cable Rail in Eagle County
  • CO 115 Improvements - Colorado Springs to Penrose
  • CO 52 and Weld County Road 37 Intersection Improvements
  • CO 121/Wadsworth Signal Improvements in Jefferson County
  • Interstates
  • US Highways
  • State Highways
  • Denver Metro Area
  • Central/Eastern Colorado
  • Northeastern Colorado
  • Northwestern Colorado
  • Southeastern Colorado
  • Southwestern Colorado
  • I-70 Wildlife Fence in Eagle County
  • CO 72 Chipseal in Larimer County
  • CO 71 Passing Lane Construction from Limon to Brush
  • Southeastern Colorado Pavement Marking
  • CO 72 Frontage Road to Indiana Street Resurfacing
  • Denver Metro Bridge Safety Improvements
  • US 385 North of Cheyenne Wells
  • I-70 Wrong Way Detection Maintenance
  • US 85 Corridor Improvements
  • US 550 Chipeta Traffic Signal Installation
  • US 40 - Colfax and Quail Signal Replacement
  • CO 71 Bridge Repair Otero County
  • I-70 VSL and CO 74 & US 285 ITS Upgrades
  • US 160-CR 225 Intersection Improvements
  • I-76 Over Clear Creek Scour Mitigation
  • I-25 and CO-7: Interim Transit Improvements
  • CO 119 Boulder Canyon Tunnel Repairs
  • CO 52 Culvert Extension at Weld County Road 19
  • Clear Creek Scour Mitigation on I-70
  • I-70 Salt Wash Bridges Scour, Mesa County
  • US 34 Brush Lateral Canal Repair
  • C-470 Trail Bridge over Acres Green
  • US 287 & CO 52 Intersection Safety Improvements
  • I-25 & Alameda Bridge Replacement
  • CO 83 Douglas County Sign Replacement
  • US 85 at County Road 14.5 Intersection Improvements
  • I-70 Bridges over Ward Road
  • I-25 Concrete Panel Replacement
  • I-25 Walsenburg Bridge Replacement
  • Firestone-Longmont Mobility Hub
  • CO 12 Bridge Replacement in Las Animas County
  • CO 115 in Fremont County and US 50 in Pueblo County Sign Replacement
Appendix G Tech Memos https://codot.gov/projects/studies/i70twintunnels-environmental-assessment/appendix-g-tech-memos https://codot.gov/@@site-logo/siteLogo.png

Appendix G Tech Memos

01 Geological Data Report
02 I-70 Phase I ESA
03 TM Air Quality
04 TM Energy Resources
05 TM Environmental Justice
06 TM Historic Prop Survey Report
07 TM Land Use
08 TM Noise
09 TM Paleontology
10 TM Recreational-and-Section 6f Resources
11 TM Regulated Materials and Solid Waste
12 TM Safety Assessment Report
13 TM Terrestrial Wildlife
14 TM Transportation
15 TM Visual
16 TM Water Resources
17 TM Wetlands

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  • Project: I-70 Twin Tunnels
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