The two principal dictonaries (OED and Webster's) provide two basic meanings; an assemblage of people (17th c.) and the building up of an embankment or the embankment itself (18th c.). The latter was extended to other constructions (in informal usage). The latter sometimes was spelt levy or levie.
There are slang usages I have run across that stretch these meanings. In the south I have heard an assemblage of workers, e. g. gathering for possible work on the docks, called a 'levee.'
Sometimes, out of their day's pay, the selected laborers had to pay a percentage- a 'levy'- to the gang boss who made the selections.

I don't think that levee is a correption of levy, but would illiterate laborers know the difference?
In other words, Foolestroupe may be right about a possible (slang) usage.