Mining will need a heavy soil cycle, which is a 45 minute cycle. The light soil cycle time is about 30 minutes.
Temperature is completely input dependent on standard no heat models. Cold water input varies greatly by geography and time of year. Hot water heater temperature setting is also highly variable dependent on market and application.
Cold cycle = all cold water input
Warm cycle = half hot and half cold
Hot cycle = all hot water
The first bath will be significantly affected by the temperature of the load. Each subsequent bath will be affected a few degrees by the previous bath if a different temperature is selected or affected very little if the same temperature is used. Over the bath time, the water will also move a few degrees toward ambient room temperature.
Because you are doing heavy soiled loads you will need hot water. If you assume half hot and half cold, measure your input temperatures and take an average and that should get you in the ballpark. There is no way to give you a reliable number without specific temps, specific cycle, actual load size, ambient temp, etc.