A responsible use of resources

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Sustainability has been adopted as a company-wide policy at Century West. We strive to balance economic, social and environmental factors in everything we do.

Every project that we undertake is evaluated and designed using a sustainability-based approach, taking into consideration the elements of economics, ecology and community that are involved in the project. A life-cycle cost analysis is also performed to help determine not only the monetary project cost, but all factors of sustainability.

Century West’s project approach incorporates the following guidelines:

  • Protection and restoration of ecosystems
  • Conservation, recycling, and reduction of natural resource and energy use
  • Reduction of pollution and use of toxic substances

This results in a clear policy, vision and public commitment, providing a stable, diverse and fair economy, as well as safe and environmentally healthy communities.

By taking a sustainable approach to our projects we can meet today’s needs without sacrificing benefits to future generations.

Project examples & outcomes

Century West’s projects have resulted in the protection and restoration of ecosystems; the conservation and recycling of resources; the reduction of natural resource and energy use; and the reduction of pollution and the use of toxic substances. These solutions also contribute to the environmental health and economy of the communities in which they are installed. In each of these project examples, our client’s expectations were exceeded through the use of sustainable solutions that are not only innovative and environmentally responsible, but also more cost effective than other technologies that are more damaging to surrounding ecosystems.

Airway Heights Water Reclamation Plant


Client goals

The City of Airway Heights consulted Century West to develop a sustainable approach to their wastewater treatment and water supply issues. The three main concerns with their current system were: a restricted wastewater treatment capacity through an inter-local agreement with the City of Spokane, a limited drinking water source from three stressed aquifers, and projected water demands that exceeded their water rights.

Sustainable design response

Century West developed a wastewater facility plan that not only relieves the City’s immediate concerns, but also provides a partial solution to the much larger regional problem. The Spokane River is currently on the state 303D list of impaired water bodies. Removing the Airway Heights discharge to the river reduces the pollutants that were causing water quality problems in the river, and by improving treatment methods, allow the treated water to recharge aquifers.

The sustainable plan for the City of Airway Heights has increased drinking water with a new water source solely owned by the City and decreased demand on the City’s stressed aquifers.

Benefits to the community

  • The facility is the first in Washington to treat water to “ultra clean” class A reuse standards
  • Airway Heights can now fulfill their water demands with a sustainable system
  • The facility eliminates the City’s need to acquire water rights from the City of Spokane
  • The facility eliminates Airway Height’s discharge to the Spokane River which is on the Washington 303D list of  impaired water bodies

Constructed Wetlands Treatment Plant


Client goals

Century West was hired by the Town of Fairfield to reevaluate their treatment options to meet State DOE requirements. Century West concluded that the recommended alternative in the Facilities Plan which included mechanical treatment and land application of treated wastewater and biosolids would require extensive operation and maintenance efforts and acquiring adjacent prime farm land. This would result in a heavy financial and staffing burden on this small farming community.

Sustainable design response

We recommended a design that included primary treatment in aerated lagoons and final treatment in about 3 ½ acres of constructed wetlands, resulting in a plant that enhances the natural environment. This innovative design utilized the existing two lagoons by converting one to an aerated flow equalization basin and one into a wetland treatment cell. The project also included influent screening, a new operations building, two additional wetland cells and ultra-violet disinfection of the effluent prior to discharge to the stream.

Benefits to the community

  • The new facility blends well with the natural habitat adjacent to the stream
  • New wildlife habitat is created that enhances the surrounding environment
  • Discharge time of treated wastewater into the stream is reduced significantly
  • The new system provides a passive treatment process that conserves energy and is easier to operate and maintain than a mechanical plant
  • The need for chemical treatment in the process is eliminated
  • Prime farmland is preserved

Porous Pavement Project

Porous Pavement

Century West conceptualized and designed a 51 acre development of Porous Pavement that solved the stormwater management and practical needs of the Port of Portland Terminal 6 Project. This porous pavement project was the largest installation to date in the US, and provided the port with 100% onsite stormwater management.

Client goals

The Auto Warehousing Corporation conveyed to the Port of Portland that they needed expanded facilities in their lease area for their operations within the next year. This timeline became one of the critical constraints for the project. The project also needed to solve stormwater management issues and meet practical needs established by the Port.

Sustainable design response

Century West analyzed traditional and innovative design solutions for the development and conducted a detailed alternatives analysis of the options. Porous pavement was identified as the preferred option to meet the tenant and client goals and was the most cost effective for initial and life cycle cost. Century West conceptualized and designed a 51 acre development of Porous Pavement that was the largest installation to date in the US, providing the port with 100% onsite stormwater management.

Benefits to the community

  • Improves stormwater quality  & eliminates the need for stormwater pre-treatment
  • Infiltration of stormwater onsite mimics the predevelopment/ natural condition
  • More efficient than conventional materials at degrading or retaining pollutants
  • Does not require dedication of additional land for stormwater facilities
  • Lower life cycle costs  & lower annual operating costs
  • Shown to remove metals, nutrients, and hydrocarbons
  • Reduces storm surge in adjacent waterways

For more information on Porous Pavement alternatives cost analysis click here