Brine pit

a salt spring or well, from which water is taken to be boiled or evaporated for making salt.

See also: Brine

References in periodicals archive ?
Brine Pit Pipes: After more than a decade, inspection revealed no corrosion (even on bolt threads) on pipes treated with CleanWirx.
Yet although "vast sums of money" was spent on sinking brine pits and erecting a salt works, the business, on the banks of the Worcester and Birmingham Canal, had proved to be a poisoned chalice.
But in the park there is a stone statue of St Richard of Chichester, who was born in Droitwich and according to legend blessed one of the brine pits when it ran dry.
The Texas Water Pollution Control Board then outlawed all brine pits in the forty-eight counties overlying the Ogallala, a large aquifer that provides fresh water to much of the nation's high plains area.