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BY MEG CALKINS, FASLA

The stone industry adopts a new sustainability standard.

FROM THE FEBRUARY 2018 ISSUE OF LANDSCAPE ARCHITECTURE MAGAZINE.

In 14 Patterns of Biophilic Design, Bill Browning, an environmental designer and founder of Terrapin Bright Green, cites “material connection with nature” as a significant principle. In other words, materials from nature, with minimal processing, can be used to construct the built environment—reflecting the local geology and connecting people to a place and natural setting. More than any other material, stone fulfills this “pattern”—often seamlessly settling a built landscape into the larger natural context. Yet in some cases, heavy stone can travel thousands of miles between harvest and use—offering absolutely no connection to the local natural landscape and creating a substantial environmental footprint.

Stone holds great potential to be a highly sustainable construction material for use in paving, stairs, and walls. It can be extremely durable, with relatively low embodied energy (energy used to produce a material), and nontoxic. However, a study from the University of Tennessee estimates that more than half of all dimension stone—defined as any stone that has been cut or shaped for use in construction—is imported, primarily from China, India, and Brazil, owing to far lower labor costs and fewer worker safety regulations, which combine for a lower product cost. Some of this stone might have been harvested in the United States, sent overseas for processing, then returned as “imported stone.” Minimal records of stone harvest, sales, and processing make it challenging to track stone’s path to market. Additionally, environmental impacts from waste and water use in stone quarrying and manufacture are not insignificant. Fortunately, a new standard from the Natural Stone Council (NSC) and the American National Standards Institute (ANSI) offers criteria for reducing the environmental impacts of stone harvest and processing and requires a chain of custody for stone so consumers can know for sure the path their “local” stone has traveled.

The stone quarrying process is often lumped together with metal mining’s heavy blasting and toxic runoff, but Kathy Spanier, the marketing director at Coldspring in Minnesota and a participant in the development of the new stone standard, emphasizes (more…)

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DredgeFest_GreatLakes_Flyer-02 If you missed DredgeFestNYC and DredgeFest Louisiana (see “The Dredge Underground,” LAM, August 2014) then you haven’t experienced one of the most interesting landscape-focused gatherings around. Fortunately, another chance is just ahead at DredgeFest Great Lakes (DFGL) this August. DredgeFest draws a friendly and curious crowd across a wide spectrum of expertise to look critically at dredging and the land it winds up making—and there are many overlaps with contemporary landscape architecture practice.

This event (conference doesn’t really describe it) will focus on the Great Lakes region (aka the Third Coast in dredgespeak). It will include two days of talks and presentations from a range of designers and others who work in this industrial practice; a day of touring dredge sites around Duluth; and a weeklong workshop at the University of Minnesota’s School of Architecture and Department of Landscape Architecture that brings in a very intriguing international cohort of designers.

This third iteration of DredgeFest should be the best yet, with the now-signature mix of intense investigations and industrial monumentality with the speculative edge that has marked previous DredgeFests.

Landscape Architecture Magazine is a cosponsor of DFGL this year. We’re looking forward to inhaling the fascinating new research and meeting folks in Minnesota this August. Registration for one or all parts of DFGL is open now.

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Courtesy oslund.and.assoc. Inc.

Formal design turned on end at the Walker.

The Minneapolis Sculpture Garden is getting an overhaul to improve its environmental performance and create new areas for commissioned works of art, thanks to the Walker Art Center and the city’s Park and Recreation Board. Across the street, the Walker is creating a new four-acre landscape designed by Petra Blaisse and her firm Inside Outside, which museum officials hope will create a unified campus.

(more…)

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