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CA: Bay-Friendly Landscapes Case Studies - Doyle Hollis Park


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Bay-Friendly Landscapes Case Studies - Doyle Hollis Park

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CA: Bay-Friendly Landscapes Case Studies - Doyle Hollis Park

  1. 1. A Bay-Friendly Rated Landscape: A Case Study DOYLE HOLLIS PARKA New Park in Emeryville That’s Good for the Community and the Bay E FAST FACTS meryville residents and workers have TOTAL LANDSCAPE COST $1.2 million been flocking to the City’s newest park since it opened LOCATION 1327 62nd Street (between in September 2009. Built on Doyle and Hollis Streets) a block-long site bordered Emeryville, California by commercial buildings and PARCEL SIZE live/work lofts, Doyle Hollis 1.5 acres Park offers this densely PROJECT TYPE developed neighborhood a Public park beautiful outdoor setting for play, relaxation and exercise. COMPLETION DATE September 2009 From the time the City of Emeryville bought the property and OWNER/DEVELOPER cleared it of an existing warehouse and concrete parking lot, the City of Emeryville, California vision was to make the park as community-friendly and Bay- LANDSCAPE ARCHITECT Friendly as possible. Community members played an active role Gates & Associates in deciding how best to transform the former industrial property San Ramon, California into a public green space, said Todd Young of Gates & Associates, the ARCHITECT/CIVIL ENGINEER Endres Ware landscape architecture firm that designed the park. Neighbors brought to Berkeley, Californiathe table issues ranging from the new park’s impact on street parking to design ideas for BAY-FRIENDLYthe play area and restroom building. LANDSCAPE RATER Design, Community &Since opening day, Doyle Hollis Park has been eagerly embraced by people living and Environment working in the area. “I think the community didn’t know Berkeley, California there was such demand for a space like this until it was LANDSCAPE CONSTRUCTION actually built,” Young said. “As soon as the park opened, CONTRACTOR the play area had hordes of users. There are kids playing Suarez & Muñoz Construction soccer in the field after school and on evenings and adults Hayward, California playing soccer on weekends. There are birthday parties there CONTACT FOR MORE INFO almost every weekend.” In addition to the open lawn and Peter Schultze-Allen children’s play area, the park features a half basketball court, City of Emeryville TEL 510-596-3728 an amphitheater, a public art fountain designed by artist Masayuki Nagase, and plenty of picnic areas and benches. J a n u a r y , 2 010 1
  2. 2. B AY- F R I E N D LY L A N D S C A P I N G P R AC T I C E SLess to the Landfill B AY-FRIENDLY AT A GLANCE Bay-Friendly RatedWhen a new park is built, it takes leadership by the project owner and Landscape score:due diligence by the landscape construction contractor to make sure thatconstruction and demolition debris gets reused or recycled instead of winding H 108 Hup in a landfill. Before construction of Doyle Hollis Park began, the Cityneeded to remove a large warehouse and a concrete slab that covered the LANDSCAPE LOCALLY1.5-acre site. The concrete, which was “one-to-two-feet thick on the west • Site analysis completed to end near Hollis Street,” maximize benefits of Bay-Friendly Landscape practices said Schultze-Allen, was all • Laboratory soil analysis provided recycled, as was most of the recommendations for organic soil amendments and fertilizers old building. All the new concrete used LANDSCAPE FOR LESS TO THE LANDFILL in the park and to build the • To reduce labor costs and plant restroom facility contains waste, plant species installed will recycled flyash. Flyash is not require shearing and will grow to mature size within space residue left after burning allotted; overplanting was avoided coal to generate electricity. • No invasive species were planted In the concrete mix used for • Long-term maintenance contract includes grasscycling Doyle Hollis park, the flyash • Site furniture and rubber displaced 50 percent of the playground surface are made with Portland cement typically recycled-content plastic • Recycled flyash displaces 50% of used in concrete. cement in all exterior concrete • 100% of compost and mulch was Other recycled-content produced from urban plant wastematerials in the park include attractive, easy to maintain benches and tables • Nearly 100% of construction andmade from a composite material that blends recycled plastic and wood. The demolition debris was diverted from landfills, including asphalt,floor surface in the play area contains some recycled rubber, and the mulch concrete and landscape debrison top of the soil and the compost mixed into the soil were made from urban • Plant debris was taken to a facility that produces compost and mulchplant debris.Protecting Water Quality NURTURE THE SOILMuch of the rainwater that falls on urban areas never has an opportunity to • Area was designated for staging materials during constructionpercolate into the soil. Instead it flows straight off of buildings, sidewalks and • Soil was not worked when wetstreets into storm drains, carrying road oil and other pollutants into the storm • A stormwater pollutionsewer system and eventually into local waterways. To address stormwater prevention plan was prepared and implemented for the siterunoff, five areas of Doyle Hollis Park have shallow vegetated depressions • Valuable trees were protectedcalled rain gardens. These have been designed to capture and naturally filter with fencing during constructionmore than 85 percent of stormwater runoff that might otherwise have flowed • Compacted soil was aerated prior to planting in all landscaped areasfrom the park into storm drains.32 J a n u a r y , 2 010
  3. 3. In addition to harvesting runoff from the park, two B AY-FRIENDLY AT A GLANCE curb cuts direct stormwater runoff from the street on• Long-term maintenance • Site lighting does the park’s north side into the rain gardens. Designing for turf includes not cast direct beam topdressing with illumination onto landscapes to take drainage off streets is part of a finely screened quality adjacent properties “green streets” movement gaining traction in the compost after aeration PROTECT WATER & AIR stormwater• Compost was used QUALITY management field. to amend soil in all landscaped areas • Integrated pest “We are going to• Fertilizers prohibited management (IPM) was used during construction be doing more of by Organic Materials Research Institute were and will be used during these green street not used maintenance retrofits around • Low or zero VOCCONSERVE WATER paints, adhesives and the City,” said• All soil is protected with sealants were used in Schultze-Allen. 2-inch layer of recycled the restrooms mulch • Maintenance practices• 2 inches of compost was require that oil leaks will Conserving Water tilled into all planting areas be repaired immediately Many experts predict California’s fresh water supplies• 89% of total plants are and off site to grow increasingly scarce as the State’s population California native or • 85% of average annual Mediterranean species runoff is treated on site grows and as global warming shrinks the mountain that require little or no in rainwater gardens glaciers that store so much of the State’s water. To help summer water CREATE WILDLIFE conserve water supplies well into the future, the City of• All turf installed serves a HABITAT recreational function Emeryville made water-wise landscaping a priority at • More than 40 distinct• Dual-pipe irrigation species were planted to Doyle Hollis Park. system is capable of increase biodiversity on delivering recycled and The park’s high efficiency irrigation system has a smart site potable water controller that adjusts irrigation volume and frequency • Landscape design• High efficiency irrigation system includes a smart includes water source based on the weather rather than on a fixed schedule. and shelter for wildlife irrigation controller In addition, the irrigation system is dual plumbed, with • The park increases open• Dedicated landscape separate pipes installed to supply potable water and space compared to its water meter installed; previous use recycled municipal wastewater that has been treated water use reported according to regular BE INNOVATIVE and disinfected. Currently the park’s irrigation system schedule • A Bay-Friendly receives only potable water but it is slated to receive• Irrigation plans were maintenance manual was reviewed by an Irrigation recycled water in the future as the East Bay Municipal developed as a basis for Association trained training maintenance Utility District’s recycled water system expands. irrigation specialist contractors• Maintenance • Educational signage The park’s open lawn requires regular summer specifications require describes the park’s irrigation but the amphitheater area has been planted checking soil moisture Bay-Friendly Landscape content with soil design, construction and with California meadow sedge (Carex pansa), a native probes before watering, maintenance practices plant that requires much less mowing or summer water adjusting the watering • 20% of street trees than conventional turf grass. The rest of the park, schedule based on planted adjacent to Silva weather conditions and Cells; 23% of street including the rain gardens, is planted with an unusually immediately replacing broken irrigation trees planted adjacent to wide diversity of plants that don’t require a lot of structural soil equipment irrigation, most of which are California native species. • Stormwater runoff fromCONSERVE ENERGY adjacent street is treated The plants are grouped according to water needs—a• 33% of paved area will in park’s rain garden strategy called hydrozoning—to help ensure they aren’t be shaded by trees over- or underwatered. within 15 years J a n u a r y , 2 010 3 2
  4. 4. InnovationIn urban areas, large street trees do much more than look beautiful and provide wildlife habitat. They also shadebuildings and streets, making people more comfortable and reducing the use of air conditioning energy. They absorbcarbon dioxide and air pollutants, helping rein in global warming and improving air quality. And the canopy and rootsystems of mature trees retain significant amounts of rainfall, helping control stormwater runoff.Unfortunately, many street trees die long before they are big enough toprovide much benefit. For trees to grow large and remain healthy, their Rain Garden Plant List roots must be able to access sizeable These plants were chosen for the volumes of uncompacted soil. But most rain gardens for their aesthetic street trees are planted in small pits filled appeal as well as their ability to survive occasional inundations in with minimal soil, and their root growth the winter, while receiving only is impeded by foundations of adjacent modest irrigation during the dry buildings and by compacted soil under season. sidewalks and streets. Shrubs Recognizing that a large population of Spice bush (Calycanthus occidentalis) mature, healthy trees is an important Rush (Chondropetalum tectorum) characteristic of a green city, the City Red osier dogwood (Cornus stolonifera) of Emeryville instituted an urban Perennials forestry ordinance that has led to “pretty Sedge (Carex buchananii Red Rooster) extensive requirements for street tree Berkeley sedge (Carex tumulicola)Large tree wells improve health of plantings,” said Schultze-Allen, includingstreet trees. California gray rush (Juncus patens) requirements that developers provide a Polemonium (Polemonium Brise d’Anjou)much larger volume of soil than a typical tree pit holds. GroundcoversThese requirements, which are being phased in over time, set minimum Fiber optics plant (Scirpus cernuus)volumes of rootable soil for street tree plantings. The volume depends on The Bay-Friendly Process While enjoying the park, visitors will likely notice credits the City of Emeryville, the community a number of signs pointing out its Bay-Friendly and the design team with making the vision for a features, from recycled mulch that helps retain soil sustainable green space a reality. “Instead of paving moisture to California native plants that provide paradise and putting in a parking lot, they took out wildlife habitat. The signs encourage an old warehouse and parking lot people to think about the park’s and put in a park,” she said. relationship to the San Francisco Bay To ensure that Bay-Friendly watershed and the benefits of Bay- practices are integrated into the Friendly landscaping and gardening. park’s maintenance routine, the City provided the StopWaste.Org provided a $25,000 grant to landscape maintenance contractor with a Bay- fund some of Doyle Hollis Park’s Bay-Friendly Friendly maintenance manual, said Peter Schultze- features. Teresa Eade, senior program manager with Allen, an environmental analyst with Emeryville’s StopWaste.Org’s Bay-Friendly Landscape program, Public Works Department.54 J a n u a r y , 2 010
  5. 5. Recycling’s Role in Reducing Emissions Clearing the Doyle Hollis Park site to prepare it for construction generated 22 tons of plant debris – that is enough to fill more than 20 large pick up trucks. By recycling that material instead of taking it to the landfill, the equivalent of 4.4 metric tons of greenhouse gas emissions were avoided. When plants and other organic material decompose in landfills, they produce methane, a greenhouse gas that is 21 times more potent than carbon dioxide.Silva cells being intalled under sidewalk to benefit street trees. Recycling that plant waste instead of landfillingthe tree’s size at maturity. A large tree such as London it plays an important role in reducing a project’splane (sycamore) must have at least twice as much soil as carbon footprint.small trees such as crape myrtle. The requirements can be The project’s demolition phase also produced 317met using regular planting soil, structural soil (a specially tons of concrete debris, all of which was recycledengineered mix of soil and aggregate that still allows instead of landfilled, saving the equivalent of 2.2roots to grow through it even if it becomes compacted), metric tons of greenhouse gas emissions. Recyclingor a new category of products called structural cells. concrete decreases emissions by reducing theAt Doyle Hollis Park, the Public Works Department amount of energy used to extract new resourcesdecided to “walk the talk” by testing the use of structural and produce new products.cells for the street tree plantings around the park. Together the greenhouse gas emissions avoided byStructural cells, which are best known by the brand name recycling the plant material and concrete at Doyleof Silva Cells, are designed to increase the volume of Hollis Park add up to the annual emissions fromuncompacted soil around a tree’s roots and grow larger, one passenger car.healthier trees. “This is the first installation in the City ofSilva Cells,” said Schultze-Allen. “It’s a relatively new idea.” normal compacted soil under a sidewalk,” said Schultze- Allen, “but is still mostly rock that provides void spaceSilva Cells are modular box-like components made of for the roots to grow in.” Silva Cells are “theoreticallysteel-reinforced plastic frames and decks. These boxes even better because it’s all soil—uncompacted regularor “cells” have large openings for water drainage and planting soil.” At Doyle Hollis Park, the Silva Cells androot penetration. When a new street tree is planted, structural soil serve as bridges for the roots of street trees,the ground adjacent to the planting area is excavated preventing compaction and improving drainage underand a framework of these cells, stacked one to three the sidewalks so that the tree roots can reach the soil indeep, is installed and filled with soil. The framework is the adjacent landscaped areas of the park.then capped with a structural deck, and covered witha geotextile, aggregate and paving. Structural cells are Carex pansa, a California nativestrong enough to prevent soil compaction and support meadow sedgetraffic loads, and can be used in parking lots, sidewalks is planted in theand plazas. amphitheatre and is low waterTen trees at Doyle Hollis Park are planted adjacent to using and doesSilva Cells, accounting for about 20 percent of the park’s not requirenew street trees. Twelve other street trees are planted mowing.adjacent to structural soil. Structural soil “is better than J a n u a r y , 2 010 5 4
  6. 6. 1537 Webster Street, Oakland, CA 94612Ask about our FREE resources: This case study was written by StopWaste.Org as part of its Bay-Friendly Landscaping program. ForAvailable online at www.Bay-Friendly.Org: information about waste reduction, recycling and • Bay-Friendly Civic & Commercial Landscape Scorecard sustainable landscaping, visit • Bay-Friendly Landscape Guidelines: Sustainable Practices for the Landscape Professional About the Agency • A Bay-Friendly Landscaping Guide to Mulch: Save The Alameda County Waste Management Authority & Money, Control Weeds, and Create Healthy Landscapes the Alameda County Source Reduction and Recycling (Available in English and Spanish) Board is an integrated public agency whose mission • A Bay-Friendly Landscaping Guide to Grasscycling: Save is to provide the most environmentally sound waste Time, Save Money and Create Beautiful Lawns (Available management program for the people of Alameda County. in English and Spanish) The authority and the Recycling Board produced this • A Bay-Friendly Landscaping Guide to Recycled-Content case study to aid developers in creating and building and Salvaged Materials: Add Value, Reduce Greenhouse sustainable landscapes Gas Emissions and Create Attractive Landscapes • Fact Sheet on Recycled Content Park & Recreation Products in Alameda County • Bay-Friendly Model Landscape Maintenance SpecificationsAlso check our website for information on the Bay-Friendly Landscape Professional Qualification andTraining for both landscape design and maintenanceprofessionals at W W W. B AY- F R I E N D LY. O R G6 J a n u a r y , 2 010