Sault n. : A rapid in some rivers; as, the Sault Ste. Marie.

Example:
Paint comming out,because of Sault in white sand.How to solve this issue?

Taxonomy
Sault Ste. Marie, city, Sault, Sault Ste. Marie, Ontario, population, Ontario, City of Sault Ste. Marie, employer, rapids, language, Canada, the International, Canadian, locks, Sault Ste. Marie, Michigan, Religion, Essar Steel, Algoma.

Defination from the web:
... Citations dating back to 1600 use the sault spelling to mean a waterfall or rapids. ...