13 drownings in Danish quarry lakes over 20 years

At least 13 people have drowned in Danish quarry and gravel pit lakes over the past 20 years, according to figures compiled by the Council for Greater Water and Bathing Safety for DR News.

Four of those deaths occurred within the past year, all in Roskilde Municipality, drawing renewed attention to the hazards of these former extraction sites now used for swimming.

Erik Bech, chair of the council, said the lakes’ steep drop-offs—sudden depth changes where gravel was once excavated—pose the greatest risk, particularly for weak or inexperienced swimmers.

“It can go from shallow to seven or eight metres deep in a single step,” Bech said. Poor visibility in many of the lakes further complicates rescue efforts.

He compared the sudden depth change to falling into a harbour bath without warning, noting that between a quarter and half of Danes are weak swimmers, according to various studies.

Some drownings may also involve underlying health issues combined with limited swimming ability, Bech added.

As former gravel pits are increasingly repurposed as swimming spots by municipalities, the council advises: learn to swim, teach children to swim, and never swim or be near water alone.