The Army Corps of Engineers, Nashville District, has a requirement for a firm fixed price service contract for a High Mast Lighting Install w/ crane rental and operator. The contractor is responsible ... The Army Corps of Engineers, Nashville District, has a requirement for a firm fixed price service contract for a High Mast Lighting Install w/ crane rental and operator. The contractor is responsible for all labor, supervision, and equipment, including an appropriately licensed and certified crane, to install one 80-foot High Mast Lighting Assembly (HMLA) at Center Hill Dam in Lancaster, TN. Please see Scope of Work and Solicitation for further details.