SERVICES PUMPS APPLICATIONS ABOUT DEWATERING HUB RESOURCES CONTACT DAM & LEVEE GROUNDWATER CONTROL As our national dam and levee infrastructure ages, the pressure to stabilize construction sites and lower costs continue to rise. There is high demand for stability & performance for projects with complex geotechnical conditions like dams & levees. EDUCTOR SYSTEMS FOR COMPLEX DAM REHABILITATION Griffin’s eductor systems are a safe, cost-effective dewatering solution for high-risk and geotechnically complex projects. Eductor systems lower groundwater tables Create stable working conditions EDUCTOR SYSTEM DESIGN Series of wells are drilled and connected to common header High-pressure water is pumped to the eductor at the bottom of the well, creating a vacuum that removes groundwater Systems perform in depths greater than 20 ft. Depressurizes surrounding impermeable soil formations such as clays & silts EDUCTOR SYSTEM CAPABILITIES More versatile than wellpoint systems Lower the water table as much as 90+ ft. Higher performance in stratified/low permeability soils Greater stability in fine grained soils Low maintenance CONTACT US FOR INFORMATION ON DAM & LEVEE GROUNDWATER SOLUTIONS CONTACT US READY FOR YOUR PROJECT? GET A QUOTE CONNECT WITH US Services DEWATERING HUB PROJECTS LOCATIONS JOBS CONTACT © 2021 Griffin Dewatering

SERVICES PUMPS APPLICATIONS ABOUT DEWATERING HUB RESOURCES CONTACT COAL ASH DEWATERING Safe and effective management of coal-combustible residuals is imperative for EPA compliance and maintaining the integrity of excavations to stay on schedule and budget. COAL COMBUSTION RESIDUAL (CCR) MANAGEMENT Water management allows for stabilization during cap-in-place and clean closure activities, providing working access for the required excavation equipment. Stabilization of fly ash requires extracting three distinct sources of water: Free water from precipitation or sluicing Groundwater that intrudes from underneath Interstitial water found in the pore spaces of the ash GRIFFINS SOLUTION - ASH POND DEWATERING Griffin engineers and designs custom dewatering solutions for unique coal ash projects. Design pumping and filtration system to remove free water Install deep wells, wellpoints, or eductors to lower groundwater below the ash pond Shallow wickpoints inside the pond drain the ash material Water filtration and treatment systems treat effluent to ensure discharge water quality is at an acceptable level CONTACT US FOR INFORMATION ON COAL ASH DEWATERING SOLUTIONS CONTACT US READY FOR YOUR PROJECT? GET A QUOTE CONNECT WITH US Services DEWATERING HUB PROJECTS LOCATIONS JOBS CONTACT © 2021 Griffin Dewatering