Specifications include, but are not limited to: furnishing all materials, labor, and equipment required for installation of concrete tunnel plugs at the east and west ends of a section of the Thorn Creek Diversion Tunnel (Diversion Tunnel); installation of mass concrete fill east of the east tunnel plug; tunnel lining and contact grouting in the Diversion Tunnel from approximately Station 135+86.40 to Station 136+33 (Contract 77-235-BF stationing); removal of the rock plug in the upper Thorn Creek Connection Tunnel (Connection Tunnel); tunnel lining and contact grouting in the Connection Tunnel from approximately Station 2+07 to Station 0+00 (Sta. 135+86.40 in Contract 77-235-BF); and removal of concrete and metal components, loose rock, sediment, and vegetation.