Project to replenish sand at Waikiki Beach to be completed in May Waikiki Beach Sand Replenishment Project is in its final stage. (Source: Department of Land and Natural Resources) By HNN Staff | April 22, 2021 at 9:08 PM HST - Updated April 22 at 9:08 PM HONOLULU, Hawaii (HawaiiNewsNow) - After months of pumping sand from off shore, the state said the Waikiki Beach replenishment project is in its final stage. Since the start of the project on Jan. 26, the state Department of Land and Natural Resources has retrieved approximately 20,000 cubic yards of sand from a large sand field in shallow waters about 1,000-feet offshore.