The principal items of work and approximate quantities include Stream Diversion and Dewatering, Mobilization and Demobilization, Implementation of the Erosion and Sediment Control Plan, Stream Diversion and Dewatering, Clearing and Grubbing, Excavation 4900 C.Y., Removal of Concrete and Masonry Structure 1450 C.Y., R-8 Riprap 2600 S.Y., Rootwads 4ea., Topsoil 420 S.Y., Erosion Control Blanket 900 S.Y., Maintain and Protect Traffic, and Seeding.