Griffin Fluid Management

Linville Dam Essi Project

Morganton, North Carolina

OWNER

Duke Power Energy

TIME

2013-2014

D.CaseStudies Linvillle Dam Web e1680539259399

GRIFFIN DIFFERENCE

Our knowledge of the local geology allowed us to design the wellpoints with properly sized filter pack and reduced screen length. Additionally, we provided the owner flexibility with our O&M proposal. Finally, Griffin offered construction dewatering technical training to the Marathon integrity dig team.

THE CHALLENGE

The water table at the location was near the ground surface, requiring groundwater at site to be pre-drained prior to excavation. A “dry hole” would allow the welders to work safely to complete the pipeline repair. Griffin has extensive knowledge of the area and knew proper well construction was required to prevent the pumping of fines from the wells.

THE SOLUTION

Griffin provided expertise and oversight for the design and installation of an eductor system, wellpoint system, and sumping system for the deep excavation at the toe of dam. 58 eductor wells were installed to obtain the required drawdown and allow for construction of a safe and stable excavation.