As Illinois’ largest natural gas distributor, and owner and operator of one of the largest natural gas aquifer storage systems in North America, NICOR has added the Prospan PRO-Lite trench shields to its arsenal.  With 2,000 employees constructing, operating, maintaining and inspecting a nearly 34,000-mile distribution system, the safety of their employees is their highest priority.  Whether it’s the Prospan air shores or our lightweight trench boxes, compliance has never been easier.