Hi,
I need to install a handicap ramp to a house I own. The rise is 19 inches
which means I need 19 feet of ramp. Does anyone know where I can find plans
on building a ramp that will meet ADA specs? Or at least the specs? I
can't find them online anywheres.

You couldn't find the ADA specs that are titled:
"ADA Standards for Accessible Design",
right in the middle of the web-page www.ada.gov?
I don't think a ramp is going to help with your disability.

Hail Eris.