"All nine yards" Origin

While talking about SNAFU, c.i. asked: "All nine yards," is also
a military creation. Do you know what it means?

I don't know if it is a military creation but I know it came from
the construction field as I was told.

In Hong Kong, in 50-60's, 9 cubic yards is called a "well", which
in addition to a water hole also means a patch or partition. It was
used by quantity surveyors to report soil dumped in landfills. It
was taken as the volume carried by a standard lorry.

A standard two-axle lorry plys 10 tonne. With the bulk density of
soil at around 1.4575 kg/m3
(see http://www.epa.gov/epaoswer/hazwaste/id/hwirwste/pdf/risk/reports/s0541.pdf),
the volume comes out to be nearly 9 cubic yards. So putting
in "all nine yards" means dumping the whole lot, everything, on the subject.

The net resources have many discussions on the subject but
none got it right. The closest is the talk about cement truck but
cement is far too heavy for older trucks. Probably few old guys like
me post on the net.