Thompson Engineering performed as a construction technical services subcontractor to Ames Construction Company on a major Southeastern US project to convert a power generator’s coal combustion residuals handling from a wet ash to a dry ash system. Conforming to latest government requirements, the site owner reconfigured site slurry and landfill operations into new conveying, separating, and treatment processes that required new underground utilities, deep foundation piling, high mass concrete structures, and steel embedments to accept new steel structures and process equipment. Total facility installed cost was in the $400-million range.
Thompson surveyors performed site project control, construction layout and staking, cut/fill calculations, pay estimate quantity tabulations, pile and anchor bolt placement, and progress and final grade survey for all new facilities. Subsurface utility identification via Ground Penetrating Radar (GPR) and other technologies were necessary over many of the planned excavation zones to implement clearance protocols prior to work, and to authorize safe excavation for yellow iron mobilization prior to cutting into the soil surface.
Thompson’s on-site construction inspection and materials testing (CMT) technicians performed daily monitoring and QC testing project files of all soil and concrete materials placed, documenting a full slate of construction Quality Control (QC) methodologies and documentation for intermittent and routine auditing by the project Quality Assurance (QA) team and the Owner. Thompson technicians worked in concert with Thompson’s soils and concrete laboratories to maintain continuous monitoring of material characteristics and finish placement characteristics against specifications (eg, batch data, pour tickets, slumps, mix designs, densities, nuclear gauging, finish compaction) along with hold point inspection documentation for record.