Empire Riverton Power Plant Demolition, Riverton, KS
Empire District Electric Company (Empire) hired KCOM to dismantle its Riverton KS facilities. KCOM performed the decommissioning and demolition of Units 7, 8 and 9. Units 7&8 are coal and natural gas fired boilers constructed in the early 1950’s, and Unit 9 is a gas-fired combustion turbine constructed in 1964. The project involved the environmental decommissioning (asbestos abatement, universal waste, removal of CCR residuals, hazardous waste, and multiple storage tanks with diesel fuel or fuel oil residuals) and dismantling of two coal fired power generating units 7, and 8 as well as auxiliary structures.
Four water intake structures had to be demolished and dismantled under a permit obtained from the US Army Corp of Engineers (USACE). Under this USACE permit, KCOM operating from barges demolished the concrete structures above the water line to a line below water as not to impede water traffic in the future. KCOM was not allowed to let any materials drop into the water and collected the materials on the barges for offloading and processing as backfill on the upland.
KCOM performed building separation, turbine generator removal, asset recovery and site restoration. During the preparation of the buildings, non-ferrous materials were separated from ferrous. Motors and switch gear was prepared for sale or salvage. This included all switchgear and electrical cabling. All above grade piping and tubing and piping supports were collected for recycling.
During asbestos abatement, KCOM crews demolished the auxiliary structures and prepped the two main boiler units for implosion. Bricks, concrete and other masonry products were utilized as a bed to break the fall of the large stack that was imploded and felled on the site. During all site activities, but particularly in this task, KCOM utilized misting systems (Dust-Boss) to control dust formation during the site operations.
KCOM removed all structures to a depth of two feet below grade. All large pipes and openings were grouted and closed. The site was graded.
All these activities were completed while the new portions of the plant remain in operations. After demolition work was completed, KCOM oversaw the restoration work on the main control room building. The restoration work involved new steel stair tower and access platforms, new roof work and asphalt roadway construction.