Northern Treatment Plant (CO)

Highlights

  • $280 million design-build delivery of 24-mgd advanced wastewater treatment facility expandable to buildout capacity of 60 mgd
  • Treatment process will address anticipated increases to the State of Colorado’s nitrogen and phosphorus effluent discharge standards
  • Facility to be operational by 2015 and will discharge into the South Platte River
  • Scope of work includes engineering, permitting, cost model development, construction, startup and commissioning

CH2M selected for DB of a new WWTP

In July 2011, the Metro Wastewater Reclamation District (the District) contracted with CH2M to serve as the design-builder for the design, construction, and startup of the Northern Treatment Plant (NTP), a new regional wastewater treatment facility to serve the northern Denver metropolitan area. The District selected design-build delivery in order to shorten the project schedule, streamline risk allocation, and establish project costs early to ensure cost certainty.

CH2M holds 100 percent responsibility for delivery of the NTP project with support from construction subcontractor Garney Construction and engineering subconsultants Brown and Caldwell, Lintjer + Haywood Architects, and Shannon & Wilson. Each member of the project delivery team is located within 60 minutes of the project site, ensuring that all project decisions are made locally in the best interests of the District.

Design flexibility planned to meet changing environmental requirements

A key component in the District’s selection of design-build delivery are the anticipated changes to the Colorado Department of Public Health and Environment statewide nutrient criteria for total nitrogen (TN) and total phosphorus (TP). The NTP’s selected delivery method and treatment process allow flexibility for the NTP to meet future requirements.

CH2M’s scope of work for the Northern Treatment Plant includes 2 phases of work. Phase 1 includes:

  • Engineering and design development for the liquids and solids treatment processes, site and support facilities, and related infrastructure.
  • Permitting support, including coordination of applicable regulatory permitting activities with the District, documentation, and meeting attendance.
  • Cost model development for a Guaranteed Maximum Price contract

Phase 2 includes:

  • Final design, construction, and construction-related activities for the NTP Facilities, including self-performance and management of subcontractors and vendors.
  • Securing of all necessary and applicable construction-related permits.
  • Startup and commissioning of NTP Facilities.

As of December 2012, Phase 1 100% design deliverables were completed with construction earthwork to begin in January 2013.