Sacramento Delta Region

Scope of work:

Gregg Drilling worked with AECOM and Kleinfelder in the Sacramento Delta for a large state-sponsored project.

AECOM has had the pleasure of working with Gregg Drilling and their overwater drilling capabilities with the Quin Delta in the past, and most recently in the Summer of 2023. Their knowledge of the region, overwater drilling expertise, and incredible staff have been a tremendous asset to many projects that AECOM has worked with Gregg on in the Sacramento Delta Region.   Some of the geotechnical exploration work with “The Quin Delta”  has required difficult navigation into shallow waters, but the Gregg Over-water team has done a great job in working through these difficult challenges.  We look forward to working with Gregg and “The Quin Delta” when duty calls in the future.” – David Pieczynski, AECOM


  • Mud rotary drilling & pressuremeter testing with Pitcher Services
  • Tracked drill rig mobilized on a barge for over-water portion of the investigation
  • Cooperation with Woocheen partners, CS Marine (barge) and Pitcher Services (on-land drilling & specialized testing) allowed Gregg to provide a full service solution
  • Drilling from Quin Delta, Gregg’s custom drill ship
  • Contract value $1.4M