R&S was engaged to accomplish engineering, procurement and construction of a limestone crushing, screening and storage system and 450 TPH capacity coal unloading and storage system for Dravo Lime's Black River Plant in Butler Kentucky.

Limestone is conveyed from the mine portal to the screen at a rate of 1200 tph where it is separated by size. The oversize fraction is sent ot a crusher and then back to the screen. Screened limestone is sent to storage piles based on its size and magnesium content through a standard conveyor, tripper conveyor, and a fixed raidla stacker. Limestone is relcaimed for calcination via an underground reclaim conveyor system. The scope of work also includes cyclones and a thickener.

Coal for the kilns is unloaded by truck into a 50 ton capacity truck dump. From there the coal is conveyed into one of three 3,000 ton silos. The silos discharge to a conveyor which sends the coal to the kilns' use bins.

The significant challenge in the execution of this project was minimizing downtime.