The Green Square Complex is a two-block, multi-use, $124-million sustainable development project, the first state government complex in Raleigh built to meet Leadership in Energy and Environmental Design (LEED) energy savings standards. Mulkey has been involved with several aspects of this unique project, including the underground portions of the parking deck; the one-level bridge over McDowell Street connecting the Nature Research Center and the new five-story Department of Environment and Natural Resources (DENR) building; and the two-level bridge over Salisbury Street that connects the existing NC Museum of Natural Sciences to its new Nature Research Center.
Mulkey also designed the structural retaining walls that feature bricks re-used from the façade of the YWCA that previously occupied the site. Mulkey provided surveying and civil engineering services, including domestic and fire waterlines, sanitary and storm sewers, erosion control, and permit coordination through the City of Raleigh, North Carolina Department of Transportation and North Carolina DENR.
Mulkey received the 2013 American Council of Engineering Companies of North Carolina (ACEC-NC) Engineering Excellence Grand Award in the Water/Stormwater category for this project.