City crews pulled a large concrete structure from the Waimea Bay shoreline Thursday morning.
High surf uncovered the hidden danger earlier this week, revealing part of the slab and rebar.
According to the Hawaii Department of Land and Natural Resources, the concrete originated from structures built years ago on the city’s fee-simple park property, and was apparently washed into the ocean by the mouth of Waimea River.
Crews used heavy machinery to pull the structure out of the sand, however officials say it was too large to completely remove from the area.
The structure has been placed off to the side, away from the shoreline, and will remain until crews can break it up into smaller pieces for disposal.