August 13 2025, Planning Board Special Meeting Transcript - WEHI

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 19 MR. AFRAN: Thank you. A. So what does that mean. Well, if you recall anything above, if you do your analysis, and I'm just going to be very transparent, when you do an analysis a number of 1.0 on a stability analysis if it's above that, according to the calculation, that means there's more resistance than forces. Resistance to failure than forces pushing it down. Basically a ratio of the forces pushing down to the force of resisting. So if you get a 1.1 or a 1.4 that actually shows that there's more resistance from failure than the force trying too fail the slope. Now, you'd say to yourself, that's a good thing. However, because if it's less then one, technically the slopes in a -- it's in an active mode of failure. However, engineering guidance and geotechnical engineering is not an exact engineering science because if you think about it, the ground conditions, the soil conditions, the rock conditions are very -- they're extremely variable from boring to boring, location to location. So the various authorities on these types of -- these subjects, geotechnical engineering in this case comes up with vertical factors of safety that you should meet. So even though you're at a 1.4 let's say in section D on Figure 4, is that enough. And so in accordance with the United States Army Core of