Have a Guess

Ron, sorry to be a smarta*r*s*e, but those salt trucks in your pictures are W models, C500's are a bit different, axle set back a bit, and taller.

hi RON
in your second pic what is the black coloured seam that is in the general area under that small slip. is it coal.
the rest of the area looks like clay or oxide material , in the mine i work at we go from clay through oxide material to sulphide (primary rock ((blue metal)))...
them batters look real tidy and only look to be at 30 degrees slope in places , very unstable that red $#it.

our ramps are designed at 10% slope at work we can get this very acurate with the mine star computer in our dozers .absolutely amazing touch screen computer in front of the operator in the dash ,that puts up with all the shakeing and vibrating that a dozer operating on rock and give no trouble at all only to watch the dozer fall apart around it :
our 789C cat haul trucks set @1800 to 2000 HP can haul 190 tonn of material up this ramp in 2nd gear at 14km per hour...the ideal target weight for these trucks is 185tonn. if we get more than 190 on em they wont cut the mustard and they go up in first at 12km per hour.
the ramp is constantly in need of maintenence ,any slumps or major move ment or compaction might only mean a 1/2 of a % alteration in the ramp slope and this creats a pinch and the trucks will struggle in 2nd and change down.
then we have all the slack operators that allow the transmissions to hunt up and down gears.(i personaly do not like to see this) :'( as its hard on the equipment with all that weight on a ramp. these truck transmissions change a lot of gears in a lifetime

Cam - No worries, feel free to correct me .. I can't be an expert on everything. I thought there were some differences between the models in the 2 pics, but I'm no KW specialist.
I do recall now, that the C-500 didn't appear until around the late 80's/early 90's.

Pat - That's not coal, it's just a very dark purple, clayey material. All of the ground you can see in the pics is oxidised ground .. the oxidised ground is quite deep on the Princess Royal.
It can vary between nothing (sulphide/hard rock on the surface), and up to 200 metres deep, in the West Oz goldfields. The Princess Royal oxidised ground is probably near the 200 metre depth.
The aim with this pit was only to extract the oxidised ore. I don't recall anyone having a suphide ore treatment plant in Norseman, big enough to treat a large quantity of sulphide ore, like an open-pit would produce.
The original Princess Royal shaft was very deep and well into sulphide ore, but the quantity of sulphide ore produced from underground mining would have been relatively small, tonnage-wise.

The pit wall angle is actually quite steep, the pics don't show it clearly. We take current pit walls up to 55

Twould imagine th@ U can order truck from KW mix n match cabs etc (within reason) as KW R a custom built truck

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The X Dampier Salt truck that I mentioned earlier was one of the W900's. I think it was an early 80's model. The owner told me that the 3408 came out of a scrapper.