My Dad worked in the building at Johannesburg station where all the plans were drawn up for an underground rail system (before removal of tram tracks), who knows if anything is still around. Knowing the land and where to build it is crazy to think they turf it out without a second thought!
Building everywhere with no forethought, not happy go lucky just plain old stupid!
Now they rely on contracts for overseas surveyors and geologists to come and do the design and planning Lady Joan, of course with a kick back to get the job.
Like our French friends that created the disaster of leaking tunnels with the Gautrain.
Only afterwards they contacted my father in law's department for advice.
So sad.
Just last year they "discovered" an "unknown" tunnel that leads from the station to the zoo lake and my father in law knows about the tunnel.
So I don't have any hope that your Dad's drawings still exist.
Blessings!
Sadly I have to agree with you, the best we older guys can do it try hang onto our sanity, keep helping other (like we always have done), try make a decent home for ourselves with this craziness around.