On Sat, 26 Jun 2004 17:43:15 -0700, "Bob Gardner"
wrote:

Minimum holding altitude is 2000 agl, according to FAAO 7130.3...hard to
conflict with traffic in the pattern at that altitude.

My copy says "MHA's are determined by the National Flight Procedures
Office." It also says

2-11. ALTITUDE LEVELS.
....Holding at 2,000' and below requires use of the appropriate pattern
for 2,000'....

Anyway, a local approach has a hold at 2,000 MSL, which is about 1,500
AGL.