I don't have my previous post.  I'm from Memphis, but Martha's Quarry is not 
close to Memphis.  It's much closer to Nashville, about 20 miles eash of 
Nasville.
Visibility in the largest portions of the quarry generally ran about 30 feet. 
The times when it decreased was only in the vicinity of the rock crushing 
equipment when lots of divers were stirring the area up.
General admission to the quarry was $15/day on the weekends, slightly less if 
you held a higher level of certification.
Beery
 > Thank you for the message on the quarry near Memphis.  I've never
 > been out there except just passing through.  All of the place I've
 > dived, Beery, in TN have local to Knoxville.  Norris and Cherokee lakes
 > in particular.  Just wondering how clear Martha's Quarry is.  I know
 > there are several water filled quarries just here in Knox county but
 > I don't know if they are open to scuba dive in what with liability for
 > the owners.  I've heard of various places where you pay to dive in
 > quarries but to my knowledge I don't know of any here.  When I lived
 > over near Asheville, NC, We'd go to Lack Jocassee, SC which was a very
 > clear lake for that area.  I've not been scuba diving myself since
 > 1990 but hope to get into diving once more.  Still figuring out about
 > Nitrox seems to have appeared here since I was out.
 > --- QScan/PCB v1.16b / 01-0221
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