Sustainable Infrastructure

The Nashville Metropolitan Government West Park Equalization Facility recently earned the Envision Platinum award for sustainable infrastructure, the highest rating of the Envision system. This is the first joint wastewater and park project in the U.S. to receive an ISI Envision rating award and the tenth project in North America to receive recognition.

Hazen and Sawyer’s design at the Venice Island CSO Facility incorporated the use of many “green” features, including a “living” roof system; rain gardens; a glass stair tower to reduce the need for interior lighting; photo and occupancy sensors for energy efficiency; shade and reflection devices to reduce the need for air conditioning; and water-conserving plumbing fixtures.

As part of the City of Raleigh's Bioenergy Recovery Project, we developed a greenhouse gas analysis/dashboard that is used for reporting purposes as well as an input to the City's decision making process.

The LEED-Silver Madbury facility in Portsmouth (NH) was designed with innovative energy-efficient elements such as positioning the plant to take advantage of solar orientation, passive solar hot water heating, and source water heat pumps for heating and cooling. Also, most of the plant materials – much of them recycled -- came from within 500 miles of Portsmouth and 80% of the construction waste was diverted from the landfill.

Hazen and Sawyer performed a carbon footprint evaluation of various supplemental carbon sources for enhanced nitrogen removal of secondary effluent from a wastewater treatment facility in North Carolina. The evaluation concluded that all sources had a comparable magnitude of carbon footprint in CO2 equivalents.

Hazen and Sawyer has practiced sustainability by delivering energy-efficient and environmentally-friendly designs to meet our clients’ water infrastructure needs since our founding in 1951. Our history demonstrates our capability to infuse sustainable innovations into final projects that address both current and future needs of our clients. We recognize that capitalizing on individual sustainable design opportunities provides a mutual benefit to the environment and the utility’s bottom line, and our approach to selecting the best fit solution for each application also demonstrates the value of these measures to the communities served.

At Hazen, the key to implementing sustainable solutions is evaluating and designing with efficiency and makes use of reliable technologies, often with a focus on the financial incentives that may be available to subsidize their implementation. Using these principles, we are committed to designing resilient facilities that are environmentally-friendly, energy-efficient, and safe. We also “walk the talk” within our own walls by championing sustainable practices. We leverage technology to minimize our resource consumption, reducing our carbon footprint by minimizing energy use, and remove bottled water from our offices by drinking the high-quality tap water produced by our utility clients.

As a pioneer in environmental engineering, we know that facilities perform most optimally when they are in balance with nature. We harness the ever-expanding set of strategies and tools that enhance the architectural design of structures that house inhabited spaces. Our depth of expertise with use of LEED and other sustainable design and benchmarking strategies is unparalleled. We are industry leaders in the application of the Envision Sustainable Infrastructure Rating System for the planning and design of water infrastructure, having applied it to over $6B in capital improvement projects. Using the right sustainability methodology at the right time is the key to our successful application of these frameworks for enhancement of the project delivery process and the completed facilities.

Our experience with discrete sustainability tools, such as life-cycle assessment (LCA) and carbon footprinting, also provides a quantitative means for benchmarking design, operation, and technology alternatives to provide comprehensive decision-making capabilities. Pioneering the application of LCA to our industry, Hazen has constructed models and templates customized to the types of systems our clients employ, enabling expedient and cost-effective quantification and comparison of environmental impacts of distinct treatment and conveyance systems. These evaluations can be used for many purposes, from energy “hot spot” analyses to compliance with greenhouse gas reduction and reporting requirements.

Hazen recognizes that sustainability means different things to different people. Our project-specific approach focuses on the voices of the stakeholders to correctly define the “best” project that meets the current needs while maintaining focus on future conditions and project drivers.

For inquiries contact:
Evan Bowles