Griffin completed a successful delivery of dewatering for Belews Creek Steam Station Overlay.
The project consisted of construction of a seepage collection filter system as part of slope stability of the existing dam approximately ±1900ft long by ±130ft wide and ±20ft crest width at the existing earthen dam located in Belews Creek, NC.
The dewatering problem:
Lowering groundwater more than ±20ft in very low permeability soils for an open-cut excavation approximately ±900ft x ±100ft.
Install combination eductor well and wellpoint dewatering systems. We installed 90 deep eductor wells approximately 65ft deep and 70 wellpoints approximately 20ft deep. The total system flow rate from eductor and wellpoint system was ±200 gpm. The dewatering system started in July 2015 and continued in operation until January 2016. Project was on schedule and successfully completed without any HSE issues whatsoever.