C470 - Wadsworth Boulevard to I-70 NEPA & Preliminary Design

Study completed

About the Project

The C-470: Wadsworth Boulevard to I-70 project is a corridor improvements project that is working towards the preliminary design and environmental analysis phase. The design team will be working in parallel with an HPTE Level 2 Traffic and Revenue study through 2020 to advance the concept design of the Proposed Action prior to NEPA. Previously this project has been analyzed or referenced in the West Connection Coalition PEL Study (2018), C-470 Corridor Revised Environmental Assessment (EA) and Finding of No Significant Impact (FONSI): Kipling Parkway to Interstate 25 (I-25) (2015), and the HPTE Express Lanes Master Plan (ELMP) Study (2020).

The corridor improvements include express lanes through the corridor, potential improvements to the interchanges along the corridor, and other focused elements including wildlife crossings, environmental mitigation, technology and system management upgrades, and bicycle and pedestrian improvements. The Proposed Action will be refined and advanced as the project moves through NEPA.

Study Schedule

  • WestConnect PEL Study - 2016 to 2018
  • HPTE Express Lanes Master Plan - 2018 to 2020
  • PEL to NEPA Transition Document - 2019 to 2020
  • HPTE Traffic and Revenue Study (Level 2) - 2020 to 2021
  • Concept Design - 2020 to 2021
  • Preliminary Design and NEPA - 2021
  • Construction Procurement (Funding Dependent) - Undecided
  • Construction (Funding Dependent) - Undecided

C-470: Wadsworth Boulevard to I-70 Project PEL to NEPA Transition Document

This document summarizes relevant information from the WestConnect Coalition Planning and Environmental Linkages (PEL) Study and other previous planning studies to support design decisions and maximize efficiency in the National Environmental Policy Act (NEPA) process for the Colorado Highway 470 (C‐470): Wadsworth Boulevard to Interstate 70 (I‐70) Project (Project). This document summarizes information from prior studies’ backgrounds, purposes and needs, alternatives/proposed actions, environmental considerations, and public involvement processes, and also outlines a NEPA work plan for the Project. Access the document by contacting the project team.