"The county has an overabundance of general aviation airports
that are underutilized and subsidized by Miami International."
Source: Miguel Southwell, with the Miami-Dade
Aviation Department (MDAD). Southwell commented on plans to mine
the site of the former Opa-locka West Airport (X46) for lime rock,
which the department then hopes to sell to pay off cost overruns
from an expansion at Miami International Airport.