NYC 235Th Street Pumping Station

New York City’s 235th Street Pumping Station Earns the Envision Gold Award for Sustainable Infrastructure


The Institute for Sustainable Infrastructure (ISI) announced today that the New York City Department of Environmental Protection’s (DEP) $30 million Reconstruction of the 235th Street Pumping Station (PS-313) located in the Bronx borough of New York is the recent recipient of the Envision® Gold award for sustainable infrastructure. The DEP worked in close collaboration with Tetra Tech to deliver this award-winning sustainable project. This project is the third DEP project to receive an Envision award, and the first to earn Gold. To earn Envision Gold, a project must demonstrate that it delivers a heightened range of environmental, social, and economic benefits to the host and affected communities.

Project Context and Background

Originally constructed in 1966, the 235th Street Pumping Station is a combined sewage and stormwater pumping station located within Riverdale Park along Palisade Avenue in the Bronx.

The pumping station handles a dry weather flow of 1.49 million gallons per day (MGD) and has a total station capacity of 10.9 MGD. The 235th Street Pumping Station receives combined sewer flow from approximately 80 acres of sewershed and is the last in a series of three pump stations.

This state of good repair project includes replacing the existing above grade pumping station building with a new building covering the same footprint as the existing building. The foundation and subgrade structure will remain in place with concrete repairs performed on the structure and new equipment (pumps, valves, controls, etc.) installed. A new emergency generator will provide backup power for the station, therefore providing for continuous sewer service to the surrounding area even in times of emergency. A new 20-inch diameter force main from the pumping station will be constructed to provide more reliable service to the surrounding community, and the roadway will be repaired at the end of the project construction.

The primary goal of the PS-313 project is to design a safe, reliable, efficient, resilient, and low maintenance pumping station. In order to achieve this goal, sustainability has been a major focus for the project team since the early planning phases. The ISI Envision rating system was identified early on as an established framework that could guide the project team to meeting this goal, and therefore the team elected to pursue an Envision Gold verification.

“As an Accountable Manager with the PS-313 design team, it was a great experience to see the different facets of the Envision requirements being implemented throughout the design phase and coming together in the construction documents.  For a pumping station rehabilitation, the goal was not only to make a better station for the Operators, but also to make a better station for the surrounding community and environment as a whole.” – Steve Elie-Pierre, P.E. – NYC DEP, PS-313 Accountable Manager

“This project met several ambitious sustainability goals which were established at the outset of the project including reducing station energy requirements and greenhouse gas emissions, reducing potable water consumption and eliminating waste from operations and maintenance activities,” said Melissa Peneycad, ISI’s Managing Director. “The project team was able to achieve its sustainability goals largely due to the successful implementation of a comprehensive sustainability management system—one of the best examples of such a system we have evaluated as part of our project verification program. We are pleased to present the Envision Gold award for sustainable infrastructure to New York City’s Department of Environmental Protection and its project partners for the PS-313 project.”

“Tetra Tech is pleased to have the opportunity to collaborate with the New York City DEP on this challenging and innovative project. The sustainable features of the upgraded facility integrate DEP’s system and culture of incorporating sustainable Envision certificate requirements into the planning, design and construction to achieve desired goals and provide indispensable operational, social and environmental benefits to residents.” – Joko Osinulu, P.E., PMP – Tetra Tech PS-313 Project Manager


The Envision sustainable infrastructure framework assesses project sustainability across five categories: Quality of Life, Leadership, Resource Allocation, Natural World, and Climate and Resilience. These key areas contribute to positive social, economic, and environmental impacts on a community during the planning, design, and construction of infrastructure projects.

Key factors contributing to the PS-313 project earning an Envision Gold award include:

Reducing Net Embodied Energy

Net embodied energy is the energy associated with the manufacturing of products and services. It is often considered ‘hidden’ energy, and, while the importance of accounting for and reducing embodied energy is gaining awareness, it remains an issue that is still too infrequently addressed by many infrastructure projects, but not the PS-313 project. This project team set out to understand the embodied energy of the project, and to that end, completed a comprehensive life-cycle assessment in accordance with ISO (International Organization for Standardization) 14040 and 14044 standards for Environmental Management—Life Cycle Assessment. Using the results of the assessment, the project team was able to reduce net embodied energy by 10% by revising materials specifications for the project to include more energy-efficient alternatives.

Using Recycled and Regional Materials

One of the sustainability goals established for this project was to maximize the use of recycled and regionally sourced materials. The project team accomplished both of these objectives. The overall recycled content for this project is approximately 83% by weight which was calculated by looking at recycled content percentages in materials specified for the project, as well as materials that will be reused on the project such as the existing concrete foundation for the station that will remain.

In terms of regional materials, nearly 100% of materials used on this project are sourced locally (from within 50 to 500 miles depending on material type).

Managing Stormwater Runoff

For the PS-313 project, the team prepared a stormwater runoff reduction report which details the intended strategy to store and treat peak discharges of stormwater from the site. One of the main goals of this project is to increase on-site water storage capacity, and recharge groundwater supplies. Located on a greyfield (previously developed site), this project has achieved a 90% improvement in water storage capacity.

Understanding Climate Change Risks and Preparing for Long-Term Adaptability

A Climate Risk Assessment and Adaptation Plan was prepared for this project. Climate related risks to the project which were comprehensively evaluated and accounted for in the project’s design include sea level rise, changing temperatures, an increase in the number and frequency of extreme weather events, and reliability of energy sources. To mitigate these issues and ensure the project is adaptable to withstand changing conditions, the design team included several measures reflecting sound engineering practices, including a complete back-up generator for the station which will provide 100% of the load to the entire station within the 24-hour fuel supply, and an enclosed maintenance location to preserve access to the site in the event of a storm surge.  The new pump station replaces two existing pumps with four new pumps (including three duty pumps and one standby) to allow for more efficient operating scenarios and provide redundancy if one of the pumps is out of service.  Additionally, this allows the pump station to adapt to future increases in flow by utilizing the fourth pump.


Minimizing Impact to Community Quality of Life and the Local Environment

One of the major challenges of this project was that the small physical size of the site and its location in the middle of a park limited design options for Envision credits.  DEP attempted to leverage the concept of redeveloping the previous site to avoid new impacts as much as practical to minimize natural world impacts.

To avoid impact to the surrounding wildlife preserve around the pumping station site, the roadway will be utilized for materials storage and laydown area during construction.  This will result in closing the section of Palisade Avenue between 232nd Street and the approximately 300 feet north of the pumping station site to vehicular traffic. However, to minimize impacts to the surrounding community, the roadway will remain open to pedestrian traffic with a jersey barrier with construction fence atop separating pedestrian ways from the construction activity. This configuration maintains access to the wildlife preserve, which was identified as important to the quality of life of the nearby residents.






New York City Department of Environmental Protection (
(718) 595-6600

Tetra Tech

Joko Osinulu, P.E., PMP
Phone: (646) 576-4041
Email: (


Institute for Sustainable Infrastructure
For inquiries related to ISI, Envision or the Envision verification program, contact:
Dyan Lee, Marketing and Communications director

Melissa Peneycad, Managing Director



About New York City Department of Environmental Protection: DEP manages New York City’s water supply, providing approximately 1 billion gallons of high quality drinking water each day to more than 9 million residents, including 8.5 million in New York City. The water is delivered from a watershed that extends more than 125 miles from the city, comprising 19 reservoirs and three controlled lakes. Approximately 7,000 miles of water mains, tunnels and aqueducts bring water to homes and businesses throughout the five boroughs, and 7,500 miles of sewer lines and 96 pump stations take wastewater to 14 in-city Wastewater Resource Recovery Facilities. DEP has nearly 6,000 employees, including almost 1,000 in the upstate watershed. In addition, DEP has a robust capital program, with a planned $19.4 billion in investments over the next 10 years that will create up to 3,000 construction-related jobs per year. For more information, visit, like us on Facebook, or follow us on Twitter.

About Tetra Tech: Tetra Tech is a leading provider of consulting and engineering services. The Company supports government and commercial clients by providing innovative solutions focused on water, environment, infrastructure, resource management, energy, and international development. With 20,000 associates worldwide, Tetra Tech’s capabilities span the entire project life cycle. For more information, please visit

PS-313 Project Team:

  • Matthew Osit, P.E. – Portfolio Manager (NYCDEP)
  • Steve Elie-Pierre – Accountable Manager (NYCDEP)
  • Dennis J. Stanford, ENV SP, P.E. – Deputy Director of Engineering Standards (NYCDEP)
  • Angelo Falabella, ENV SP – Sustainability Analyst (NYCDEP)
  • Frank Loncar – Director, BWT (NYCDEP)
  • Paul Kiskorna – Chief, Collections and Resource Recovery Operations (NYCDEP)
  • Li Quan Chen – Division Chief, Program Management (NYCDEP)
  • Michael Bomar – Project Director (Tetra Tech)
  • Joko Osinulu, P.E., PMP – Project Manager (Tetra Tech)
  • Jake Oldenburger – Sustainability Designer (Tetra Tech)

Thank you to all the NYCDEP and Tetra Tech Team Members that supported this award-winning sustainable project and the legacy of sustainability in NYC.

About ISI and Envision®: Envision is the product of a joint collaboration between ISI, which was founded by three national engineering associations: American Society of Civil Engineers (ASCE), American Council of Engineering Companies (ACEC) and American Public Works Association (APWA), and the Zofnass Program for Sustainable Infrastructure at Harvard University Graduate School of Design. For more information, please visit


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