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Staff seeks CMGC approach, reports CDOT concurrence for Happy Canyon interchange
Summary
Staff briefed council on design alternatives for the Happy Canyon interchange, said CDOT and partners concurred with using a construction manager/general contractor (CMGC) delivery method, and noted the project's TDM report reached a 1.8% reduction versus CDOT's 3% target for more urban interchanges.
The presentation on the Happy Canyon interchange described the project's environmental and delivery planning and why staff are pursuing a construction manager/general contractor (CMGC) approach. "Wednesday of this week, we got concurrence from CDOT RTD to go ahead and do a CMGC," Rebecca said, noting the approach allows a contractor to participate in design for constructability and cost savings.
Staff also explained the required Travel Demand Management (TDM) work meant to reduce ramp trips; the project team reported a modeled 1.8% trip reduction achievable through multimodal measures (bike lanes, carpooling and park‑and‑ride options), below CDOT's typical 3% goal for more urban interchanges. Staff said they expect to issue an RFP for CMGC to align with design milestones.
