When a heavy downpour the morning of June 15, 2019, dumped even more water into the 32 billion gallons already in the reservoir of Iraq’s Mosul Dam, it didn’t faze the U.S. Army Corps of Engineers (USACE) staff, the Iraqi Ministry of Water Resources (MoWR) employees, or the Italian Contractors working inside and on top of the dam, because they knew that despite record rainfalls this past Winter, Mosul Dam was standing strong. In fact, the rain was a welcomed addition to the day because it cooled down the entire valley a few hours prior to the arrival of several dignitaries, including U.S. Ambassador to Iraq Matthew H. Tueller, Iraq Minister of Water Resources Jamal Abbas al-Adili, and Italian Ambassador to Iraq Bruno Pasquino, who were travelling to Mosul Dam to formally recognize the conclusion of the largest drilling and grouting project currently in the world, and to celebrate the full return of the drilling and grouting operations back to the Iraqis.