Archived
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Location
Lexington, Kentucky
Start Date
7-5-2026 9:00 AM
End Date
7-5-2026 9:30 AM
Description
The Lay of Land Area (LOLA) is a 10-acre (40,468 square meters) legacy disposal impoundment containing approximately 55,000 cubic yards (42,000 cubic meters) of sluiced coal combustion residuals (CCRs) produced during startup operations of a former fossil plant. Most of its perimeter is bounded by water, with a river to the north and a cooling water lake to the south. The entire area lies within a 100-year floodplain, is heavily forested, and groundwater is typically encountered within a few feet of the existing ground surface. As part of an overall CCR closure-by-removal and ash beneficiation program, planning, design, permitting, and initial construction activities for LOLA are underway and present challenges not typically associated with smaller CCR impoundment closures. Technical challenges include: • Completing subsurface investigation programs relevant for beneficiation assessment, engineering design, and construction planning. • Developing a work layout and sequencing plan that allows safe and efficient excavation, load-out, and traffic circuiting while accommodating passive dewatering and active water management controls. • Establishing work approaches and response measures to protect clean-closed areas from active work runoff and prevent CCR release during river flooding. • Evaluating the structural condition and implementing repairs for a bridge crossing the cooling lake spillway, which is required for construction access. Closure planning has also required multiple field delineations and studies, including wetlands, streams, floodplains, threatened and endangered species, and cultural resources, as well as obtaining permits and approvals for floodplain development, erosion and sedimentation control, permits, and dam safety.
Document Type
Presentation
Archival?
Archival
Included in
Energy Systems Commons, Environmental Indicators and Impact Assessment Commons, Environmental Monitoring Commons, Mining Engineering Commons, Oil, Gas, and Energy Commons, Structural Materials Commons, Sustainability Commons
Site Characterization, Design, Permitting, and Construction for Clean Closure of a Small but Challenging Legacy CCR Disposal Impoundment
Lexington, Kentucky
The Lay of Land Area (LOLA) is a 10-acre (40,468 square meters) legacy disposal impoundment containing approximately 55,000 cubic yards (42,000 cubic meters) of sluiced coal combustion residuals (CCRs) produced during startup operations of a former fossil plant. Most of its perimeter is bounded by water, with a river to the north and a cooling water lake to the south. The entire area lies within a 100-year floodplain, is heavily forested, and groundwater is typically encountered within a few feet of the existing ground surface. As part of an overall CCR closure-by-removal and ash beneficiation program, planning, design, permitting, and initial construction activities for LOLA are underway and present challenges not typically associated with smaller CCR impoundment closures. Technical challenges include: • Completing subsurface investigation programs relevant for beneficiation assessment, engineering design, and construction planning. • Developing a work layout and sequencing plan that allows safe and efficient excavation, load-out, and traffic circuiting while accommodating passive dewatering and active water management controls. • Establishing work approaches and response measures to protect clean-closed areas from active work runoff and prevent CCR release during river flooding. • Evaluating the structural condition and implementing repairs for a bridge crossing the cooling lake spillway, which is required for construction access. Closure planning has also required multiple field delineations and studies, including wetlands, streams, floodplains, threatened and endangered species, and cultural resources, as well as obtaining permits and approvals for floodplain development, erosion and sedimentation control, permits, and dam safety.
