|high-use lawns||public spaces||structural soils|
|naturalized landscapes||steep slopes||urban soil conditions|
|on-site soil restoration||stormwater biotreatment||waterfronts|
|over-structure||streetscapes||wetlands / water|
Allegheny Public Square
Boston Children’s Museum
Boston Convention Center
Brooklyn Botanical Garden
Brooklyn Bridge Park
Central Wharf Plaza
Cincinnati Riverfront Park
Cleveland Convention Center
Four Freedoms Park
Fresh Pond Reservation
Harvard Science Center
Hudson River Parks
Isabella Stuart Gardner Museum
King Khalid City
Koch Institute, MIT
Mount Auburn Cemetery
Mystic River Reservation
Newport Beach Civic Center
New York Botanical Garden
New York Police Academy
Rose Kennedy Greenway
St. Albans School
Shelby Farms Park
Transbay Transit Center
Washington DC DOT
West 57th Street
World Trade Center
The Allegheny Public Square revitalization transforms a central park in Pittsburgh, improving connections, increasing green space, creating a model for sustainability, and establishing a venue for public art. Pine & Swallow designed soil and drainage strategies to support a range of plantings, including a bio-treatment area, intensively planted beds, and street trees.
The Bethel Woods Center for the Arts includes a 15,000 seat outdoor performance venue, smaller performance sites, a museu,m and a system of trails and protected open spaces at the site of the original 1969 Woodstock festival. A particular challenge was to create a seating lawn at the new pavilion, given the naturally poorly drained clayey on-site soils. Pine & Swallow designed a two-layered, sand-based soil design to withstand the high use, but which drains rapidly and is suitable for seating. P&S also developed strategies for amending on-site soils for other varied lawn and planting areas.
The Boston Children’s Museum includes a public space which is a popular tourist destination along the waterfront of Fort Point Channel, adjacent to the city’s Harborwalk. A recent expansion project included significant enhancement of this space. Pine & Swallow identified existing conditions ranging from essentially impervious clay fill to rubble materials and site planting challenges including salt spray, storm flooding and saline groundwater tidal conditions. P&S then provided recommendations for plant materials and designed complex subsurface environments to support plantings.
The Boston Common Parade Grounds is a prime visual, historic, and functional public lawn in Boston. The area, over both structure and urban fill, is intensely used on a daily basis as well as for major events. Pine and Swallow worked with the Boston Parks Department to analyze existing conditions and develop strategies for soil modification and lawn restoration to better withstand the high level of use.
The new 1.7 million square foot Boston Convention Center anchors a mixed-use neighborhood in South Boston's historic seaport district. The landscaped entranceway was designed to express the strong geometry of the architecture with plazas planted with honey locust to flank the ceremonial and civic portal. Pine & Swallow developed structural soil strategies, targeted soil blends and a system to harvest stormwater runoff from the plaza surfaces and redistribute it to the rootzone below via gravity. The rainwater harvesting system was created as a prototypical long-term, sustainable solution for the passive irrigation of urban trees over structure.
Originally designed by Frederick and John Olmstead, the Brooklyn Botanical Garden contains renowned specialty gardens on its 50-acre site. The landscape design for a new visitor center includes a series of vegetated cleansing and water collection features in the form of bioswales and rain gardens. New plantings have been introduced and are featured as a new horticultural exhibit while providing a unique landscape context for the center, adding further prominence to the Garden's new entrance. Pine & Swallow provided technical support including soil profile design and horticultural soil specifications for a wide range of site conditions and locations.
The 85-acre Brooklyn Bridge Park runs approximately 1.5 miles along the East River at the Brooklyn Bridge, including six piers and associated uplands. A large constructed landform with slopes up to 45 degrees, requiring various stabilization strategies, runs the length of the park to provide separation of the waterfront from nearby highways. Pine & Swallow was responsible for the design and specification of all planting soils and for soil drainage strategies on the project, including high use and amenity lawns, play areas, major shrub, and tree zones, and new freshwater and coastal tidal wetlands. The design included stormwater harvesting and a constructed stream and wetland system to treat collected stormwater prior to its reuse for irrigation.
Brookside Gardens includes aquatic, azalea, butterfly, rose, children’s, formal, fragrance, Japanese, and trial gardens as well as indoor conservatories in a 50-acre naturalized setting. The gardens are operated and maintained by the Maryland-National Capital Park & Planning Commission. P&S worked on major revisions to the entrance configuration and plantings needed in response to extraordinary attendance growth.
The design for the development of this eight-acre luxury mixed-use project, located in the heart of Atlanta’s Buckhead neighborhood, prioritized urban horticulture that celebrates all four seasons, a mature tree canopy, and eclectic landscape elements that evoke the vibrancy of a thriving urban neighborhood. Pine & Swallow worked with Hoerr Schaudt on complex soil and horticulture systems for major streetscape and over-structure plantings.
The landscape for the new Gates Computer Center transforms a former “back door” to the campus into part of the Carnegie Mellon central campus landscape in Pittsburgh, and creates pedestrian connections through the site, in turn allowing for future campus expansion. Pine & Swallow designed planting media for a range of landscape conditions, including rooftop, meadow plantings, tree groves, and numerous steep slope conditions. P&S also assisted with both subsurface ground water controls and stormwater runoff design.
Central Wharf Plaza creates a connection between Boston’s Rose Kennedy Greenway and Boston Harbor at the Aquarium. Twenty-six 12-inch Pin and Red Oaks were planted within the plaza and as street trees around its perimeter. Pine & Swallow specified sand-based structural soil to provide structural support for cobblestone paving, designed as permeable pavement and as horticultural support for the plantings. P&S also designed a stormwater harvesting system to collect storm water in slot drains and distribute it through slotted pipes to the horticultural soil under the cobblestones. The sand-based structural soil provides stormwater bio-treatment prior to deep infiltration.
The 45-acre central riverfront park is the remaining and largest jewel in a series of public parks reconnecting the heart of Cincinnati — Fountain Square — to the Ohio River. The park includes a major event lawn and street tree plantings over an underground parking garage as well as a large park area adjacent to the Ohio River, including a series of individualized park areas. Site conditions ranged from over-structure plantings to flood zones along the river, all designed for intense public use. Pine & Swallow provided soil and subsurface design and planting recommendations, including a structural soil system for street tree plantings.
The approximately 14-acre CMMCC site creates a landscaped mall in the center of downtown Cleveland, located over the Cleveland Convention Center. The project design incorporates historic alignments, including broad pedestrian allees and a large lawn area designed to accommodate high-use civic events and celebrations. Pine & Swallow evaluated alternative structural soil strategies, advised on tree plantings to match available rooting volumes, and provided soil designs for varied planting conditions.
As part of the Deer Island Treatment Plant located on a Boston Harbor island, a massive landform was constructed to visually isolate the facility from the residential community and accommodate the recreational public as part of the National Park system. Since new soil materials required costly barge transportation to the island, reuse of all available on-island earth materials and minimizing off-island borrow was essential. Challenges included slope stabilization and creating growing media from essentially impermeable native glacial till soils. Pine & Swallow designed soil mixes totaling more than 100,000 cubic yards to support extensive plantings and create a low maintenance naturalized settings tolerant of harsh New England coastline conditions.
Corktown Common, formerly known as Don River Park, is a focal point for a major downtown Toronto re-development and includes construction of new wetland systems, flood protection levees, wet meadow, athletic fields and a large urban prairie. Pine & Swallow developed strategies to treat both on- and off-site stormwater with treatment wetlands. P&S also designed a structural soil system for major street tree plantings. PSE's interpreted and complied with stringent environmental regulations which governed all soil designs.
The Washington DDOT is developing sustainable standards for all future street construction and tree plantings. Pine & Swallow is working with A. Morton Thomas & Associates and Lee & Associates to establish standards for permeable pavement design, for stormwater bio-treatment, and for street trees / structural soils. This work will create strategies and specifications suitable for projects on all DC streets, ranging from local street improvements to major construction projects.
The park stands at the southernmost point of Roosevelt Island in New York City and is a memorial to FDR. Originally designed by Louis Kahn, a double row of trees narrow as they approach the point of the island, framing views of the New York skyline and the harbor. At the point excerpts from Roosevelt's Four Freedoms speech are carved on the walls of a simple monument. Pine & Swallow developed a structural soil system beneath the pavements to support trees, and developed planting soils for turf and beds to support a range of horticulture.
The Fresh Pond Reservation is a 162-acre preserve surrounding a City of Cambridge drinking-water reservoir. The new park area included a soccer field, community gardens, path and trail systems, a butterfly meadow, and new wetlands and wet meadows. Pine & Swallow provided hydrologic design for the wetland storm-water treatment system to protect drinking water supplies while creating an ecological design feature, developed a soils management plan and soil blending strategies for the range of site landscapes, and assisted with stabilization systems for naturalized paths.
Situated on 200 acres of landscaped lawns, meadows, and woods, the Glenstone Museum presents rotating exhibitions of modern and contemporary art that includes a selection of outdoor sculptures. Design strategies for a new expansion emphasized creation of an ecologic and sustainable landscape of walking paths, bridges, water garden, and restored meadows and woodlands. Plans include high use turf areas at the entrance, a green roof, vast meadow and grazing lands, and the planting of more than 6000 trees. P&S designed economical soil blends utilizing onsite soils that were augmented specifically for the needs of each planting zone. P&S evaluated soil submittals and provided consultations during construction.
The Governors Island plan preserves 87 acres of open space close to downtown Manhattan, plants more than 1,300 new trees, and creates a cluster of steep hills that form a focal point at the park's center and an array of parkscapes ranging from a "hammock grove" to athletic fields to large public event expanses. Sustainability was a core principle driving the plan. Pine & Swallow carried out an analysis of existing conditions, including available soil resources and subsurface drainage requirements and developed soil designs to minimize the need for imported soils. The team for this project is led by the landscape architecture firm West 8 and includes Mathews Nielsen (associate landscape architect), Rogers Marvel Architects, Diller Scofidio + Renfro, Tillotson Design Associates, Pentagram, and Magnusson Klemencic Associates.
Center City Park created a civic focal landscape from a utilitarian area including parking lots. The design includes a fountain serving to represent the seasonal streambeds in the Piedmont region of North Carolina, as well as a great lawn, a path system with plantings reflecting the regional plant palette, and a revitalized streetscape. Pine & Swallow provided soil design, including sand-based structural soil for the streetscape plantings and designed drainage strategies for the complex landscape.
Pine & Swallow has worked on numerous projects at Harvard / Radcliffe, including the Spangler Quad at the Harvard Business School and the Radcliffe Quad, both of which have very high intensity use including for graduation ceremonies. P&S worked with the schools to develop soil systems and construction procedures for restoration of existing lawns, protection and rejuvenation of existing plantings and for new lawns, plantings, and sports fields.
The $1 billion Harvard Allston Science Complex is envisioned to be a world class center for science and is the first structure on the new Harvard Allston campus. The entire project is being developed as a sustainable site with a high-level LEED rating. Pine & Swallow designed soils and assisted with design of a bioswale stormwater treatment system which runs through the four-building project integrating landscape spaces designed for varying micro-climate conditions.
The Esplanade in front of the Hatch Shell is the iconic image of a public lawn area. The lawn is used as seating for multiple concerts each year, but is especially known for the Boston Pops 4th of July concerts, when several hundred thousand people come to the area. The lawn area received a complete reconstruction in 2015 including redesigned grading, under drainage, and modification of the existing soils to support the new turf. Pine and Swallow conducted a site investigation and developed strategies for soil amendments, drainage and turf grass blends, and provided construction observation.
The High Line establishes a greenbelt park along an abandoned 1.5-mile section of a former elevated freight railroad on the lower west side of Manhattan. This project won numerous prestigious awards. It created a variety of ecological environments as well as public amenities in an over-structure condition, and has transformed this portion of the city. Pine & Swallow designed all soil and drainage strategies, and conducted construction observations.
The Hudson River Parks extend approximately five miles between Manhattan’s West Street and the Hudson River, encompassing 550 acres. The park project includes a waterfront esplanade running its length providing views of the River, paralleled by tree-shaded lawns, gardens, tennis courts and other facilities for more active recreation. The park also creates street tree plantings along West Street. Pine & Swallow prepared a Master Soils Specification for the various individual park areas, including material descriptions, soil profiles, soil volume requirements for tree plantings, in-place and laboratory testing procedures, and material placement operations. P&S also developed strategies for construction on thirteen old maritime piers as well as in varied urban soil conditions along the waterfront.
The 26 acre Hudson Rail Yards on the west side of Manhattan is being transformed into a $20 billion office retail, residential and cultural development called Hudson Yards. The project includes a major civic plaza at the northern terminus of the High Line that will be built on a platform that spans the rail yards. Pine & Swallow has been working with NBWLA to create appropriate soil environments for major plantings that will be subject to high stress including mitigation of high heat conditions.
The International Fund for Animal Welfare developed a brownfields site for its new headquarters. After site cleanup, native, drought tolerant plants were used for ecological restoration including connection to adjacent conservation areas. Vegetated swales and rain gardens were designed to provide biotreatment of storm water and to increase infiltration. Pine & Swallow created a soil management plan to optimize use of natural soil resources, designed the soil profiles, assisted with hydrologic management, and provided construction observation services.
The new building, designed by the Renzo Piano Building Workshop, is situated on Frederick Law Olmsted’s Emerald Necklace park system. As the Soil Scientists on this project, Pine & Swallow created functional horticultural soil and drainage contexts for sustainable plantings. Stabilized steep slopes, trees in paved areas and high use turf areas required engineered blended soils manufactured off-site and placed under strict compaction limits. Special soil amendment techniques restored existing soils supporting mature trees. The redesign and renovation of the Monks Garden, a garden that dates back to the museum’s opening in 1903, presented an opportunity to combine horticulture and art that offers year around interest and compliments the interior space. Pine & Swallow developed soil and drainage strategies to support complex planting designs within a limited, confined area.
The Indianapolis Art Park will include new civic amenities while also creating a new transportation corridor, all designed to the highest sustainability standards. Pine & Swallow is working on the design of large bio-treatment areas to collect all runoff from the site and from surrounding streets and remove pollutants prior to re-directing the runoff to storage containment for re-use. All runoff from a new street passing through the site will pass over porous pavements that serve to irrigate street trees. Sand-based structural soil that will support the porous pavement will provide stormwater treatment. The bio-treatment areas are being designed as visual amenities with varied hydrologic conditions to support wetland, wet meadow and upland plant communities, providing varied visual conditions.
King Khalid Military City in Saudia Arabia is a 50,000-inhabitant new city constructed in a desert area of Saudi Arabia. Pine & Swallow carried out soil, water, and horticultural analyses for development of the entire landscape for the city and provided specifications for a laboratory and landscape testing program, an on-site field station, and a plant production nursery. P&S also provided analysis of artificial ground water conditions due to extensive proposed irrigation and design of a subsurface drainage control network.
The Koch Institute for Integrative Cancer Research has created new public spaces. Lines of trees create pedestrian corridors breaking up the expanse of sidewalk and creating visual interest. Sand-Based Structural Soil was used beneath the entire plaza and sidewalk areas to provide horticultural soil for both the trees in paved areas and trees in planters that had inadequate soil volume to support large trees. Perforated pipes beneath the paving provide necessary aeration to the horticultural soils and serve as conduits for drip irrigation tubing. Trees include Honey Locusts, Ginkgos, and a variety of other species.
Lakewood Cemetery, renowned for its magnificent landscape, was modeled after the rural cemeteries of 19th-century France. An elegant contemporary landscape design now integrates a new visitors' reception building, a new garden mausoleum, and a classic Byzantine Chapel. Pine & Swallow restored and modified existing on-site soil resources to respond to new landscape requirements, including high-use lawn panels, focal planting beds, over-structure conditions, and naturalized plantings.
This new urban park currently under construction sits on nearly 5 acres in the city’s cultural arts district in the heart of historic downtown Greensboro. The park features an event lawn with a performance pavilion, a children’s garden play area, a dog park, terraces and plazas. The park’s construction coincided with the renovation of adjoining streets to create an integrated landscape. Pine & Swallow provided design phase support by assessing existing information and conditions and recommending strategies for horticultural soils. P&S designed soil profiles and soil specifications for the various planting environments and provided construction phase support. P&S previously worked on the nearby Greensboro Center City Park.
Mount Auburn Cemetery contains thousands of shrubs, herbaceous plants, and trees (more than 600 species) on 175 acres of hills, dells, ponds, woodlands, and clearings. Pine & Swallow worked on various horticultural and drainage issues to restore, maintain, and enhance this extraordinary and historic landscape.
The Reservation was constructed on 200 acres of land along more than a mile of the Mystic River to provide active and passive recreational facilities where saline dredge spoils and random urban fill materials had previously been placed. Some areas were underlain by soft sediments and former marshlands. 250,000 cubic yards of horticultural soils were blended to create specific planting mediums to support specially selected plant materials. Subsurface drainage and salt control systems were designed, settlement analyses were carried out, and preload areas were designed and implemented.
The Newport Beach California Civic Center project creates a 16-acre park including a civic lawn for outdoor events, sculpture installations, and 1-1/4 miles of walking and viewing trails as well as new civic structures and parking. Pine & Swallow developed soil resource management plans for reuse of existing soil and identified new regional soil resources in order to create appropriate planting soils for the numerous planting conditions.
Parkmerced is a 116-acre mixed housing development dating back to the 1940s located in the southwestern portion of San Francisco, adjacent to Lake Merced. The Parkmerced Plan will transform this outmoded development to a visually appealing landscape that celebrates the neighborhood’s hydrology, creates natural habitat, and promotes the efficient use of resources, while meeting the community’s needs for recreation, open space, and local food production. As part of the Phase 1 design and development team, Pine and Swallow will investigate existing soils and drainage and provide design guidance to the Design Team. Additionally, P&S will review and advise on landscape design documents and will provide planting soil specifications to support the Team’s plan. P&S will also provide construction phase support, including on-site observation.
Featuring 50 gardens on 250 acres, the New York Botanical Garden is one of the premier botanical gardens in the United States. Taking advantage of the site's diverse growing conditions, the new Native Plant Garden displays a variety of native plants and water features combined in an integrated and comprehensive design. Planting areas include native woodlands, meadows, plant beds, and areas where new plants are integrated with mature specimens. Pine & Swallow assessed existing soils, developed strategies for maximizing reuse of on-site soils, integrated stormwater management with new surface water features and created specifications for all horticultural soils.
The landscaping for the new NY Police Academy in Queens includes an interior courtyard and muster area and landscaped buffers, including naturalized meadow areas. An on-site drainage swale was designed with a variety of native plants, resulting in an on-site open space amenity. The project incorporates a variety of sustainable design components to achieve LEED Silver requirements. Pine & Swallow developed soil planting strategies, including stabilization of the tidal drainage areas, over-structure plantings, meadows, and structural soil to support extensive tree plantings in parking areas.
The Boston Central Artery project, the Big Dig, removed an elevated highway that divided the city and created a new landscape corridor, transforming the entire city center. Pine & Swallow participated in general planning for soil resources and provided master soil specifications for planting soils and for sand-based structural soil systems. P&S also provided soil and drainage design for individual park segments.
The Cornerstone Memorial Garden is located on the historic grounds of the National Cathedral Close on the St. Albans campus in Washington, DC. The landscape design included landscaped terraces, gravel pathways, stone walls and plantings on slopes. Pine & Swallow specified the soil design for the garden plantings as well as planting areas around new academic buildings, and also consulted on the restoration of an eroded hillside disturbed by construction.
Seaport Square is transforming the South Boston Waterfront area with a 6.3 million square foot mixed-use development located on 23 acres, including 25% green space. The project is designed with multiple independent parcels, controlled by Master Plan documents by Reed Hilderbrand with Pine & Swallow’s guidance on soils, drainage and horticulture. P&S has also worked on most of the individual projects. The area consists of former mud flats and marshes, filled with random materials and with salty ground water that fluctuates with tidal influence. The area is also subject to flooding during extreme storm events. P&S designed an integrated horticultural soil system, including systems to prevent salt migration into planting zones, for leaching salts after high water or flooding events and for ongoing monitoring of conditions.
For the Woodland Discovery Playground at Shelby Farms Park in Memphis, Pine & Swallow developed strategies for amending existing, heavily compacted soils to provide appropriate soil media for new plantings and for restoration of existing plants. Those soil strategies became a central component for this project, becoming a Pilot Project for the Sustainable Sites Initiative. For the proposed expansion of Patriot Lake, P&S developed additional soil remediation strategies in scale with this 2-million-cubic-yard earthmoving project in order to solve soil drainage challenges and provide planting media in cost-effective, sustainable ways.
This 250-acre Tanglewood Center for the Performing Arts property is the site of summer music concerts and festivals, with more than 300,000 visitors each year. Located in the Berkshire Hills of western Massachusetts, the rolling campus of Tanglewood contains outdoor and indoor performance halls, studios, and classrooms and has been the summer home of the Boston Symphony Orchestra since 1937. In order to maintain the site’s casual character, Pine & Swallow assisted in creating an ADA-compliant crushed stone mix as a pathway paving material, integrating new paths with the existing landscape while meeting accessibility requirements. P&S also designed soil strategies for restoration of existing plantings and construction of new areas.
Teardrop Park, with its varied plantings, extensive rockwork, waterfalls, and play areas, is a visual jewel and a center of activity in Manhattan’s Battery Park City. Pine & Swallow designed and specified nine manufactured soil blends to meet stringent and complex geotechnical and horticultural demands. P&S also designed subsurface drainage and a wetland system, worked with local soil suppliers to find appropriate soil resources, and provided construction observation for the complex soil construction. Sustainable initiatives include reusing gray water from surrounding buildings for irrigation as well as sustainable landscape construction materials. The plantings are designed to thrive in a relatively shady site and provide habitat for native and migratory birds. The soils are designed to support plant life without the use of chemical fertilizers, pesticides, herbicides, or fungicides.
The roofscape of the Transbay Transit Center in San Francisco will be an iconic 5.4-acre park, designed as both a public destination and a community park within downtown San Francisco. The park, which includes a variety of botanical gardens and habitats for birds, butterflies, and other pollinators, is being designed to the highest sustainable standards including absorption of carbon dioxide and a complex stormwater harvesting, treatment, and reuse systems. Pine & Swallow created soil specifications and rooftop drainage strategies for a range of conditions from wetlands to support of major trees.
Pine & Swallow has provided soil and drainage design for a number of United States Embassies including: Mexico City; Baghdad and Erbil, Iraq; Kabul, Afghanistan; Oslo, Norway; Tunis, Tunisia; Paramaribo, Surinam and Taipei, Taiwan. P&S evaluated existing soil and horticultural condi-tions at each site and researched soil supplies to meet complex planting re-quirements ranging from high-use turf to complex plantings in a range of climate and environmental conditions. P&S drafted landscape soils specifications and consulted on soil drainage strategies for these projects. Incorporation of local earth materials and utilization of local customary construction practices has been essential.
The historic Watch Factory complex, located along the Charles River in Waltham, Massachusetts, consists of approximately 400,000 square feet of space in 22 interconnected buildings. The multiphase redevelopment project consists of the rehabilitation and adaptive reuse of the complex as a vibrant mix of office, residential and retail uses with riverfront amenities. The development features sustainable design initiatives with landscape treatment techniques to manage storm water discharge into the Charles River and promote local groundwater recharge. Pine & Swallow was responsible for the design and specification of all landscape soils including planting bed and turf areas, as well as pervious pavement areas, storm water infiltration swales, and rain garden areas. The rain garden design involves three levels of storm water treatment: suspended sediment removal, nutrient consumption, and heat dissipation and detention.
The Alumnae Valley project transformed a brownfields portion of the Wellesley College campus into a visual focal area, a stormwater bio-treatment system, and a passive recreation area. A pond, wetland, and stream system now treat runoff that previously discharged directly into Lake Waban. The treatment system, surrounded by new landforms and plantings, creates both a park and a visual amenity. Pine & Swallow assisted with liner technologies to ensure hydrologic function, and designed soil blends for wetland and transition zones as well as for varied upland planting environments, and also specified steep slope stabilization techniques.
The West 57th Street project includes both streetscape and over-structure plantings associated with high-end residential unit courtyards and common areas in a new building. The complex planting design, combined with varied topographies, defines private and common spaces, provides visual interest and creates a variety of eco-types and recreational uses. Pine and Swallow designed several soil types to optimize horticultural support of the design.
Pine & Swallow created soil designs to support street tree and associated plantings within the World Trade Center site Public Realm District Reconstruction, all meeting strict New York Port Authority requirements for this iconic site. P&S is also working on Liberty Park which will be constructed on the roof of the World Trade Center’s Vehicle Security Center overlooking the 9/11 Memorial. Over-structure project conditions require design of ultra-light weight growing media including structural soil.