Rock Creek Digesters 3 and 4 Cover Rehabilitation

Furnish all labor, materials, and equipment necessary to: Demolish and dispose of the existing Digesters 3 and 4 roof covers and related appurtenances, except for the pressure/vacuum relief valve assemblies, which are to be removed and returned to Owner for salvage; Temporarily remove and pull back all existing electrical, mechanical and instrumentation to allow full demolition and installation of new digester roof covers; Provide new digester covers and appurtenances on Digesters 3 and 4; Install conduit and all previously removed electrical, mechanical and instrumentation equipment; Provide sidewall hatches with access doors and pipe penetrations where shown at the lower level of both Digesters 3 and 4; Provide stairs from the roof of Digester 3 down to the roof of the adjacent building.