8-6-25 Planning Board Minutes - Laserfiche WebLink

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Approved 9.3.25 439 community well. You don't think that's going to tap into the natural source that the residents who 440 already live there are tapped into as well? 441 442 Beth Trahos: Well,that was a question that was raised. And so,we turned to experts because to do some 443 research and to coordinate with our neighbors and to do some research to see what happened. 444 And I'm going to ask Ward, thank you, to come forward, and he is the gentleman that did this 445 work, and his report is in your packet. And he can provide more details now. 446 447 Delores Bailey: Before we do it,what I just want to say. I'm familiar with communities that are on wells and the 448 stream that they tap into, so that's what my question is going to be about. What this community 449 well is tapping into that's different than what everyone else is using now. 450 451 Ward Marotti: We collected a couple weeks of ambient data of the three wells,the proposed community well, 452 and the two adjacent single-use wells. One of which was the gentleman's that just spoke. The 453 other of which was the Rigsbee's existing single use well. We collected a couple weeks of 454 ambient data prior to the draw down of our proposed community well. 455 456 Chris Johnston: I apologize, could you define ambient in this situation? 457 458 Ward Marotti: I was just about to. 459 460 Chris Johnston: Wonderful. Thank you. 461 462 Ward Marotti: Ambient data, meaning with no impact or no effects, no withdrawals from us. In other words,the 463 exiting conditions. Document existing conditions with no impact from our use or testing. After a 464 couple weeks of ambient data were collected,we then did a draw down, both all the way down to 465 the 660-something feet of the proposed pump depth of the proposed community well as well as a 466 steady state 2-hour draw down,which the yield of which was 90 gallons per minute. Steady state 467 draw down means that the level of water in the well does not change. The volume of water that 468 comes into the well equals the volume of water that's being pumped out. The surface elevation 469 within the well doesn't change. So,we did a steady-state test as well as a full draw down test, and 470 there were no impacts to the adjacent wells as documented by the surface levels that we were 471 monitoring, both a deep well, which was the Rigsbee's well at approximately 500, 1 think it was 472 505,was the depth of their pump, and based on the landowner that just spoke,we didn't have any 473 actual permit data for his well, but based on the information he provided, it was approximately the 474 well and/or pump is approximately 75 feet deep, so we did a shallow well and a deep well. That is 475 the direct results, and looking at the direct results before, during, and then 10 days or 2 weeks 476 after that draw down was done, no impacts were observed in those adjacent well levels. That was 477 the direct data, and the analysis of the direct data, a hydro geologist on my team is putting those 478 data into a hydro geologic model that is established by the state of North Carolina to extrapolate 479 and document other potential impacts, but again, based on the initial results of just the raw data 480 and before, during, and after, and no documentable impacts to those levels in both the shallow 481 well and the deep well, adjacent wells, it's very unlikely that the result of that modeling will have a 482 different outcome, but we'll see what that outcome is when the modeling's completed. That's 483 underway now. 484 485 Delores Bailey: So,what source is the well tapping into? 486 487 Ward Marotti: Groundwater. 488 489 Delores Bailey: And what are the other residents tapping into? 490 491 Ward Marotti: Likely different aquifers. Because the Rigsbee well is at, again, I think it's 505 feet. 492 493 Delores Bailey: Right.