Demolition, site work, paving and new construction of a bridge / tunnel in Raleigh, North Carolina. Conceptual plans call for the demolition of a bridge / tunnel; for the construction of a bridge / tunnel; for site work for a bridge / tunnel; and for paving for a bridge / tunnel.

Nature Research Center - Skyway Bridge HVAC Replacement and Rainwater Harvesting System Renovation The Nature Research Center (NRC) is located in the Downtown Government Complex in Raleigh, NC. This project consists of two separate packages. Each package will be bid separately. (1) Skyway Bridge HVAC Replacement ($603,000): The chilled beam cooling system serving the two skyway pedestrian bridges connected to the Nature Research Center has had poor performance and constant maintenance issues. This project will replace the chilled beams with standard ceiling mounted fan coil units, utilizing the existing fresh air duct. The existing building automation will be expanded to accommodate the new fan coils. This work may require replacement of the dropped ceiling and associated modifications to sprinkler heads and smoke detectors. (2) Rainwater Harvesting System Renovation ($863,000): The Nature Research Center is equipped with two rainwater harvesting systems, one for building water use and one for stormwater management/irrigation. At the time of the building's design, commercial rainwater harvesting was an emerging technology in the southeastern US. The systems operated for a short period of time but were shutdown after a series of design, construction and operational problems emerged. This project will address the leakage from the cistern adjacent and uncover the causes of these problems and make necessary modifications to restore the system using today's industry knowledge and technologies. The project will likely include replacement of filters and pumps, new piping and valves, new controls and integration into the building automation system, civil and sitework modification, etc.