LASN is a photographically oriented, professional journal featuring topics of concern and state-of-the-art projects designed or influenced by registered Landscape Architects.
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(Continued on page 18) 16 Landscape Architect and Specifier News Missouri native Layne Morrill grew up near Table Rock Lake in Kimberling City, Mo., located in the Ozarks near the state's Arkansas border. The lake's 856 miles of shoreline provide residents like Morrill countless hours of recreation and ensure area businesses revenue through the tourists that visit the lakeside towns each year. When Morrill, who since 1968 has co-owned a retail shopping center adjacent to the lake, learned that installing a Permeable Interlocking Concrete Pavement, or PICP, parking lot could play a role in protecting the lake's water quality while improving his real estate investment, he endorsed the idea immediately. "I knew I had seen permeable pavers before, but had no idea what they did until we sat down to talk about renovating our parking lot," said Morrill. Along with his co-owners, he had considered alternate surfaces for the three-acre, 30-year-old parking lot of Kimberling City Center. Gopala Borchelt, executive director for the nonprofit water quality organization Table Rock Lake Water Quality, Inc., brought together the ownership group with Belgard Hardscapes, an expert in PICP solutions. Belgard representatives met with the owners, explaining PICP as a system of pavers over layers of aggregate that filters stormwater running off the parking lot down between the pavers and through varying sized stone. The aggregate cleans the water, which can be stored temporarily in an underground storage basin before being released to natural aquifers or, as in the case with Table Rock Lake, released directly back into the lake. Based on studies of similar types of paver systems, the PICP system at Kimberling City Center was estimated to capture roughly eight pounds of nitrogen, 1.5 pounds of phosphorus, four pounds of metal (iron, copper, lead) and 125 pounds of soil and minerals per year, which otherwise would compromise the lake's water quality. "Water quality is a very important issue," Borchelt said. "People live here, visit here, and move here for the White River Valley. We didn't want to just talk about it. We wanted to do something that would protect the lake better than it had been in the past." Permeable interlocking concrete pavers can be installed by a machine, and installer Aqua-Paving Construction was able to lay more than 1,000 square h a rd s c a p e s By Chuck Taylor, Belgard Commercial Pavers, National PICP Educator and Installation Expert PICP Updates and Improvements Above The City Center parking lot in Kimberling City, Mo., was repaved using Belgard's Aqualine L and Holland permeable pavers in Gascony tan and red. The collected and cleaned stormwater is held in temporary underground storage before being released into the lake, keeping the water quality high and the number of pollutants low.