dry well

Etymology
From.

Noun

 * 1)  An underground structure (for example, a pit filled with gravel) that disposes of unwanted  (most commonly  and  and in some cases ) by holding it and  it into the.

Usage notes
Do not confuse a dry well (/ˈdɹaɪˌwɛl/) with a dry well (/ˌdɹaɪˈwɛl/) in the merely collocational sense (a versus the compound noun), that is, a  that has run  (whether a water well or an ).