120th Avenue Connection

CDOT, in partnership with the City and County of Broomfield, proposes to extend 120th Avenue from Wadsworth Parkway, across US 36 to approximately 120th Avenue and Teller Street, including an intersection with US 287.

The purpose of the 120th Avenue Connection project is to accommodate existing and forecasted east-west through-traffic, reduce out-of-direction travel, and alleviate traffic congestion.

An Environmental Assessment for this project was completed in March 2005, and a Finding of No Significant Impact (FONSI) was approved by the Federal Highway Administration in January 2006.

Improvements will be completed in three phases:

Phase I (Design-Build) will construct portions of 120th Avenue (0.7 mile), a bridge carrying 120th Avenue over US 36, and a bridge carrying 120th Avenue over Commerce Street.

Phase II (Design-Bid-Build) will construct improvements to 120th Avenue east of US 36, and will require significant right-of-way acquisition and relocation. The project schedule has not been finalized.

Phase III will construct the local road system off of and around the 120th Avenue improvements constructed in Phase I. A portion of Phase III work is included as Additional Requested Elements in Phase I work to maximize the "best value" of the design-build contract.

In October 2007, CDOT Chief Engineer Pamela Hutton authorized proceeding with development of Phase I of the 120th Avenue Connection project as a design-build project. The selection process for design-build projects includes two milestones: a Request for Qualifications (on this project, issued in October 2008) followed by a Request for Proposal (issued January 29, 2009). The design-build team will be selected and the project awarded (anticipated in May 2009) based on a "best value" approach.