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Timmons Group's Project Receives LEED Certification
April 20, 2009

Timmons Group has announced that the firm’s recently completed 1050K Street project in Washington, D.C. has received LEED® Gold Certification. Timmons Group’s team of experts contributed comprehensive professional services that included civil engineering, landscape/hardscape, green roof design, drip irrigation design, stormwater mitigation and rainwater harvesting design, landscape, civil and irrigation construction administration, topographic survey, construction stake out and LEED certification support.

1050K Street is an eleven-story, 140,000 square foot Class A office building located in the heart of Washington, D.C. on the site of a former parking lot. The Lenkin Company assembled a comprehensive team of landscape architects, horticulturalists, civil engineers, irrigation specialists, architects and construction administration experts to develop this world-class example of green building.

Timmons Group collaborated closely with Hickok Cole Architects to cultivate the concept of a “living” building that would blur the lines between inside and out. The resulting design involves two levels of green roof with one level doubling as an overlook and entertaining terrace. Roof water, chiller water and plaza run-off is collected in a cistern underneath the building. Cistern water is then filtered and pumped to the irrigation system and through a water feature bordering the entrance lobby and into a series of three urban bio-retention areas integrated into the plaza design. Drip irrigation has been designed for all planting areas to conserve and optimize use of water from the cistern. The irrigation control system utilizes state of the art evapo-transpiration referenced programming via satellite which downloads information from local NOAA weather stations. For this ultra urban site, there is no runoff anticipated in a two-year storm or less.

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