Skip to content

Home
Travel
News
Safety
Performance
Business
Programs
Projects
About CDOT

Spanish
Chinese (Simplified)
Vietnamese

A-Z A-Z
- A
- Annual Reports
- K
- KForms

Projects

You are here:

Home
Projects
Studies
I-70 Twin Tunnels Environmental Assessment
Portal to Portal Companion Report Final June 28, 2012

Resources

Projects
Assets
Studies
Region 1 Denver Metro/Central Colorado Projects
Region 2 Southeastern Colorado Projects
Region 3 Northwestern Colorado Projects
Region 4 Northeastern Colorado Projects
Region 5 Southwestern Colorado Projects
Central 70
Santa Fe Drive Action Plan- A Planning & Environmental Linkages (PEL) Study | C-470 to I-25
Southeastern Colorado Bridge Bundle Project
CO 82 - Paepcke Transit Hub Improvements in the City of Aspen on Main and Galena
Eisenhower-Johnson Memorial Tunnels Infrastructure Repairs
CO 115 Improvements - Colorado Springs to Penrose
US 85 Corridor Improvements
I-70 VSL and CO 74 & US 285 ITS Upgrades
CO 119 Boulder Canyon Tunnel Repairs
C-470 Trail Bridge over Acres Green
I-25 & Alameda Bridge Replacement
I-70 Bridges over Ward Road
I-25 Walsenburg Bridge Replacement
Firestone-Longmont Mobility Hub
Drew Dix Parkway Dillon Drive at I-25 Interchange
Metro Denver Bridge Deck Safety Project
US 6 & 20 Road Intersection Improvements
CO 64 Bridges west of Meeker
CO 318 Resurfacing Project Moffat County
US 285/CO 9 Intersection Improvements & Bridge Replacement
US 36 Surface and Safety Improvements between Boulder and Lyons
CO 71 Passing Lane Construction from Limon to Brush
CO 138 Logan County Widening Project
CDOT Retaining Wall Improvements in Jefferson County
CO 133 Culvert Repair in Bowie, CO
Preventative Maintenance of I-25 bridges at 58th and 62nd
CO 71 Overlay between Ordway and Punkin Center
Eastbound I-70 Mount Vernon Truck Escape Ramp Reconstruction
I-70 Eastbound Resurfacing in Clear Creek County
I-70 Picadilly Design-Build Project (City of Aurora Project)
CO 66 Intersection Improvements in Northeastern Colorado/Region 4
I-25 Concrete Panel Replacement from Fort Collins to Owl Canyon Road
I-270 Bridge Preventative Maintenance
Northeastern Colorado Pavement Marking & Rumble Strips
Southeast Colorado Sign Replacement (12 locations)
US 34 CCTV Weather Cameras from Greeley to Wiggins
US 24 Intersection Improvements
I-25 Acceleration/Deceleration Lanes Fillmore Street to Garden of the Gods Road
C-470 Bridge Repairs over I-70
US 34 Highway and US 36 Highway Resurfacing
I-25 and CO 12 Critical Culvert Repair
I-25 Crystal Valley Interchange in Castle Rock
US 285 Englewood Traffic Signal Upgrades
CO 66 and Weld County Road 21 Intersection Improvements
I-70 Noise Wall Replacement: I-76 to Pecos Street
Denver Metro Guardrail Project
I-25 Resurfacing in Pueblo County
I-25 Colorado City Surface Treatment
US 550 Paco - Billy Wildlife & Safety Improvements
US 50/CO 115 Roundabout in Penrose
CO 121/Wadsworth Signal Improvements in Jefferson County
US 85 Traffic Signal Installation at Daniels Park Road
I-70 Concrete Panel Replacement Project Arapahoe County
US 50 Surface Improvements in Bent County
El Paso County Americans with Disabilities Act Ramp Work
Pavement marking in Southeastern Colorado
US 50A Resurfacing from Coaldale to Salida
CO 83 (Parker Road) Sidewalk East Side
CO 66 Culverts West of Platteville
US 40 Steamboat Main Street Rehabilitation
US 6 New Castle Roundabout
US 287 Longmont Signal Pole Improvement
I-70 Bethune & Burlington Improvements
US 160 Surface Treatment from Kim to Pritchett
US 285/US 50 Intersection and Surface Improvements
US 24 Signal Replacement Project in Woodland Park
Southwestern Colorado Chain Station Improvements
US 40 Intersection Improvements in Hugo
US 24 South of Minturn Resurfacing
South Central Colorado Culvert Repairs
US 34 Timber Bridge Replacement East of Laird
US 385 Realignment and New Structure south of Bristol
CO 13 and CO 317 Surface Treatment
US 6 & Post Blvd Roundabout, Avon, CO
CO 69 Walsenburg Shoulder Widening & Safety Improvements
I-25 Resurfacing Midway
Denver Metro Culvert Repairs
C-470 & Quincy Roundabouts
CO 52 Resurfacing East of Hudson
I-70 Variable Speed Limit Signs
Southwestern Colorado Striping
US 160 Roadway Improvements in Southwestern Colorado
CO 61 Resurfacing East of Sterling
US 50 Olathe Resurfacing
CO 14 Cameron Pass Resurfacing
I-76 Corridor Improvements Between Iliff and Crook Interchanges
US 6 North Avenue Traffic Signal Replacement
I-70 Eagle Essential Wall Repair
US 84 Slope Repair in Archuleta County
CO 65 and CO 330 Grand Junction Chip Seal
CO 82 Snowmass Canyon Resurfacing
Resurfacing project on I-70 in Mesa County.
CO 7 Resurfacing from Boulder to Lafayette
US 40 Passing Lanes Project in Grand County
I-76 Denver Metro Sign Replacement Project
US 24 East Resurfacing from Falcon to Peyton
US 40 Granby Trail
US 40/CO 287 Boyero Bridge Replacement
CO 72 Chip Seal James Creek to CO 7
CO 145 Ophir Wall Replacement
CO 119 Resurfacing Project in Nederland
CO 21 Powers Boulevard and Airport Road Interchange

Portal to Portal Companion Report Final June 28, 2012 https://www.codot.gov/projects/studies/i70twintunnels-environmental-assessment/Portal%20to%20Portal%20Companion%20Report%20_Final_062812_.pdf https://www.codot.gov/@@site-logo/siteLogo.png

Portal to Portal Companion Report Final June 28, 2012

application/pdf Portal to Portal Companion Report _Final_062812_.pdf — 5.4 MB

Stay Informed

© 2022 State of Colorado
Accessibility
Privacy Statement
Security Statement
Transparency Online