Subsurface utilities include installation of water, sewer and storm drainage construction. In addition, UNICORN has experience with structural (bridge) drainage and bridge dry standpipe installation. While working with certain specialty firms, we have installed power, communication and signal infrastructure, including, but not limited to, high and low voltage electrical ductbanks, signal and communication cable troughs, utility vaults, handholes and manholes, splicing chambers and electrical equipment foundations and buildings. Furthermore, we have also installed critical foundation and support structures for large diameter gas pipeline work. Associated work required to safely handle construction of these subsurface utility elements is the excavation and design/installation of safe support of excavation (SOE) and work plans in compliance with local and federal regulations..