Defintion of a HUMP at the Gorge??

[Brainamus]

So, I always here the Macks are on the "humps" which is where I think I have fished for them before. So my question is what makes a "hump" a hump? How much of a difference in elevation does it have to be, a sharp rise to a peak or just a gradual incline only a couple feet difference? And how big of an area do these humps take up, 50' across, 200' across?
I'm heading up this Thursday for four days or so. How deep are the macks this time of year or I guess when the water temperature is what it is currently.

Thanks for any info you can share.[fishin]
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