Hello Pecosmud,

I am no geologist, but here is my understanding:

- A drill hole is tiny compared to the big scheme of things. The drill can go deep to hundred of metres but the diameter of the core is just a few cm. So, one single drill hole is just like piercing the needle in the haystack, hoping to hit something at that spot, but it does not provide any lateral information. The grade is good for the cross section of the core (also averaged for a section of the core, say 1m?, depending on how the lab is doing the assay). So, anything around that hole has to come from a neighboring hole. In your example, a neighboring hole is #402.

- Interpolation: At the depth where they intersected the good grades, geos will need to guess the values in between 394 and 402. The lateral distance down there is approximately 100m between the holes. There are rules for interpolation (for the NI-43-101). Not sure if the infill drilling must be 100m or 50m apart. Perhaps, others could step in to clarify this.

- Extrapolation: If you look to the right of hole 402, there is no neighboring hole for interpolating. If you are brave enough you could extrapolate. Again, there are rules for acceptable extrapolation. Imagine another hole that could be drilled straight down so the distance (at that depth) would be around 50m. This is where the guessing game would begin. It could hit nothing (i.e. 0 gpt) or the same grade, or even higher than 6.4 gpt. In the absence of the drill hole results, as a guess, you could perhaps assume the same grade 6.4 gpt/27m (the height in the "cheese block model") at say half the distance, i.e. 25m (this is the width, the term I used for my "cheese block model", for the volume calculation to get the tonnage). BTW, the stepout distance is the length for the cheese block model, in this case 200m for the holes in the lake (Vol=WxLxH).

- A better example: Take a look at the holes along section 1200SE where the star hole 256 is located. With a lot more infills, the interpolation/extrapolation for this section is more reliable (they all seem to hit good grades. As a first guess, the width for this section is approximately 400m?

Hope the above would be useful for you to start an initial guess for the tonnage of cheese block under the lake.

BTW, the ice holes at 1700mSE are still about 200m from the shore of the patented wedge claim.Thought that there was another drill location @ 100m closer to the shore. Was this drilled but the results are not yet available? Or, Dave did not want to get too close to the shore of that wedge. Anyone cares to speculate.

Goldhunter