December 10, 2025, Planning Board Special Meeting - WEHI Transcript

19 of 55 sheets Page 73 to 76 of 144 01/14/2026 10:36:25 AM 73 will live in the building and live below it, correct?1 The computer analysis did not identify a critical2 A. safety. The safety factor probably for any modes of3 failure involving the building are likely to be greater4 than 2.0.5 Than 2.0?6 Q. Yeah.7 A. So in other words, you would want to --8 Q. I don't know that for sure, I am guessing it9 A. would likely be.10 You want to use a 2.0 then because that's the11 Q. point at which everyone agrees nothings going to happen,12 right?13 No.14 A. So you want a 2.0 --15 Q. Even 2.0 something could happen.16 A. Correct. But the engineers all agree that there17 Q. is no likely safety factor above 2.0, correct?18 Sorry.19 A. The engineers agree in your statement that20 Q. there's no need to be concerned about a safety factor21 above 2.0, isn't that correct? That's what you said.22 No -- you're talking about Princeton Hydro and23 A. Langan?24 I'm just repeating what your said. You said the25 Q. 74 engineers, in plural, all agree there was no need for a1 safety factor higher than 2.0, isn't that what you just2 said?3 I don't recall saying that.4 A. Okay.5 Q. Now, if this were a major rock slope, right?6 Meaning not soil, in your understanding Section 8-13A7 says, "For major rock slopes where the consequence of8 failure is severe a minimum required calculated Factor9 of Safety is 2.0." That's what it says, right?10 Yes.11 A. Now, what is the consequence of failure? What12 Q. does that mean to you as an engineer.13 It could be all kinds of consequences. It could14 A. mean the structure is damaged, itself is damaged or --15 and/or needs to be repaired. But we're not talking16 about a structure on this slope.17 Because you're not building it on the slope?18 Q. The analysis for the slope -- excuse me, if I can19 A. explain. The analysis for the slope that Langan20 produced included the building in the analysis and the21 critical failure services did not include the building.22 There were no changes in the safety factors reported23 with the building or without the building.24 If you have continued excess fracturing below the25 Q. 75 structure of the building on top of a slope, which you1 acknowledge has in fact further excess damage to the2 slope structure, and the collapse of that rock3 structure --4 I don't understand. What structure?5 A. The rock structure I'm

f a slope, which you1 acknowledge has in fact further excess damage to the2 slope structure, and the collapse of that rock3 structure --4 I don't understand. What structure?5 A. The rock structure I'm referring to.6 Q. Yes, the loading is -- this rock structure has7 A. been subjected to maybe a thousand feet of, feet of ice8 on top of it and a glacier traveling across it.9 Which caused a lot of fractures, isn't that10 Q. correct?11 Well, yes.12 A. Okay.13 Q. But it's experienced far worse than anything that14 A. could happen, you know, in this local span of time.15 And in fact the fracturing on this site continues16 Q. over time, doesn't it?17 Not necessarily, no.18 A. The natural forces that cause the excess19 Q. fracturing you refer to in your report continue, don't20 they?21 Well, no. The fracturing is due to cooling -- 20022 A. million years ago it was due to cooling and then23 whatever tectonic forces occurred afterwards.24 You said last week that the excess fracturing is25 Q. 76 a factor of gravity working on the rock in the direction1 of the eastward slope, isn't that what you said?2 I --3 A. "Yes" or "no", didn't you say that?4 Q. No, you're interpreting whatever I said5 A. incorrectly. I didn't say it that way.6 You may not have used the exact form of words but7 Q. you agree that gravity on rock exposed in a slope face8 continues to weather and fracture, isn't that correct?9 I didn't -- I don't know that it's going to10 A. necessarily fracture again.11 You were worried about joints opening that could12 Q. get water that would cause fracturing?13 There may be existing ones that resulted from14 A. something that occurred 200 million years ago.15 Then why bother to grout them?16 Q. So that any water doesn't end up daylighting on17 A. the slope.18 In other words, if it daylights it's because it19 Q. is spreading the rock more and more?20 No, it's just filling an open void. I don't21 A. necessarily say it going to -- you're going to have to22 move the rock.23 This is at odds frankly with your report. You24 Q. don't say these things in your report. You say,25