Ok I went back and looked at last season usage on a 15000 sq ft lot.
We used 15-50# bags for anti ice control, or 50# per 1000 sq ft, or 3000# per lane mile/60000 sq ft
We used 10-50# bags per 15000sq ft for deicing, or 2000# per lane mile/60000 sq ft
Now ground temps, humidity, air temps, and type of precip all affect application rates.
I cannot speak for Chuck as to why his rates are what they are, I can only tell what mine are. I would rather use a little more and get results, then to use to little and be back for a second trip.
There is no magic formula that gives you the exact answer.
I see DOT trucks all the time, when trying to remove hard pack run straight salt at like 4 tons per line mile, yet they will give you an exact formula if asked, and I know they are full of crap.
If you are getting freezing rain, that hopper door is going to be wide open, but if the sun is comming up, and you have a little glaze, you will trickle the material onto the lot.
So in your case I assume that the road is about 20' wide, that gives you about 30000 sq ft. Now what you really want to know is how much money is this going to cost you to apply the material, so that way you can figure a profit. Application rates are secondary, and mean nothing if you dont get the results. So if you are deicing I would apply 1000# of magic coated salt, and if I were anti icing I would apply 1500# of magic salt. So that is 10 bags at
$10.00 per bag, so your cost is $ 100.00 to salt that road, so salting should gross you 100% mark up, you charge
$200.00 to salt that road.Now if you pre treat that road before hand and never have to plow, you charge for a salting of $200.00, and what ever you charge to plow that road. If you figure that at say the same $200.00 then you charge out a total of $400.00 for $150.00 worth of product and a hour of your time . Not to bad.
In my case I purchase in bulk, and that same 1000# will cost 1/2 of what it will cost in bags, so my profit is even larger.
My clients want black and wet, some markets expect less, so adjust accordingly.
You asked ,and I answered.
So if I can be of any further assistance, or if you still do not understand, feel free to contact me.
Dino