national 9/11 memorial

constitution gardens

ellis island

branch brook park

hoboken pier A park

butternut plaza

more projects, in short



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new york, new york

On behalf of Quennell Rothschild & Partners, Landscape Architects, PC+A conducted a complete inventory and evaluation of approximately 400 shade and ornamental trees throughout the grounds of the United Nations Headquarters.  All collected data was organized and analyzed and a variety of summaries were produced illustrating the current state of the tree population – species composition, diameter and age distribution, condition, condition by species, prioritized work needs, etc.  PC+A prepared a detailed report, including specific treatment recommendations and general population-wide management objectives, which were used in the development of the landscape master plan for the campus.

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trenton, new jersey

Designed in 1891, Cadwalader Park is the only park in New Jersey fully designed by Frederick Law Olmsted and on the National Register of Historic Places.  On behalf of March Associates, PC+A complete a full inventory of all the park’s trees as part of the team’s development of a Master Planting Plan to adapt Olmsted’s original design intent to current needs and conditions.  In particular, PC+A’s tree inventory and assessment was used by March Associates and Kathy Poole to edit existing vegetation to clarify the landscape, restore historic viewsheds, shape spaces, and create moods.


new york, new york

On behalf of the project Architects and Landscape Architects, PC+A inventoried and evaluated the condition of existing shade and ornamental trees throughout the project area and provided recommendations for tree removal, transplanting, removal, or mitigation treatments for each impacted tree in accordance with New York City Departments of Design & Construction, Transportation and Parks & Recreation requirements.  In addition, PC+A contributed to the design of an on-structure public plaza within the Circle to ensure that newly planted trees would thrive while not impacting subway tunnels below.

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newark, new jersey

On behalf of the Port Authority of NY and NJ and working closely with its in-house landscape architects and consultants, PC+A provided field inspection services during landscape construction on a number of projects over an 8-year period: Terminal B Roadway and Drainage Improvements, NEC Monorail Station, Lot E Parking Structure, and Airtrain Lot D.  PC+A inspected plant materials for adherence to the Specifications, ensured proper handling and installation, diagnosed insect and disease issues, and provided custom treatment strategies to ensure establishment during the 2-year maintenance period for each project. In 2011, the Port Authority received an NJASLA Award of Merit for Landscape Design for the Terminal B Roadway and Drainage Improvements project.

We’re writing up more of our projects - stay tuned…



brooklyn, new york

As part of a Master Plan effort by Quennell Rothschild for this Registered Historic Landmark, PC+A inventoried, evaluated, tagged, and mapped the 7000+ trees that comprise Green-Wood Cemetery’s amazing 478 acres urban forest.  The inventory revealed 172 different species and hybrids representing 76 different genera.  The resulting analysis, prioritized maintenance and replacement recommendations, and long-term management guidelines provided by PC+A serve to improve visitor safety and ensure that the collection is perpetuated within Green-Wood’s rural design and historic context.


new vernon, new jersey

PC+A inspected and diagnosed $750,000 worth of large caliper trees a few years after they were planted during the conversion of a former horse farm into a residential estate.  The collection included numerous 40’ - 50’ pines, 14” - 17” caliper beech trees, 12” lindens, and several large, specimen Japanese maples, magnolias, and others.  Two years after they were planted, most trees had declined in condition and several had died.  PC+A uncovered several contributing factors and custom-developed and supervised a program to rehabilitate the trees and improve site conditions.  After two years in which PC+A oversaw implementation of the program and supervised tree care and landscape contractors, the trend of tree decline and death had ceased and the condition of the remaining trees had visibly improved. Most recently, PC+A planned and supervised the digging, delivery and installation of a 22” caliper, 45’ tall copper European beech with an 11' diameter root ball.

© 2014 Paul Cowie and Associates, Inc.