PB Agenda Packet - Aug 6 2025 - Laserfiche WebLink

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As shown on its Orange County Existing Well/Septic System Authorization, the Rigsbee Well is 505 feet deep, with a 35-foot well casing and a static water depth of 25 feet. While no formal permit data were available for the Griffin Well (i.e., it appears to pre-date the Orange County Database/Permitting Requirement), the owner indicated that, to his knowledge, the Griffin Well depth is 75 feet, with the pump at 65 feet and the static water depth at 35 feet. As shown in the Yadkin Well Company’s report (Appendix 1), the Proposed Community Well depth is 665 feet, its static well level is 33 feet below the top of the casing and the casing extends 2 feet above the ground surface. As shown in Graph 1, between 13 and 27 June 2025 the Rigsbee Well static water depth below the surface ranged from 23.49 to 105.01 and averaged 35.01. The depth to water regularly fluctuated from approximately 23 feet and approximately 45 feet below the surface throughout the monitoring period, indicating this is the well’s normal variation. However, there were notable, more significant fluctuations between 14 and 16 June 2025. On 14 June, between 0554 and 1004, the depth to water dropped from 24.43 feet below the surface, to 91.23 feet. After a rapid rise to 57.08 feet at 1509 there was another rapid drop to 87.04 feet at 1554, before again rising rapidly to 24.49 at 0624 on 15 June. Again, on 15 June the water surface elevation dropped from 23.76 feet below the surface at 0734, to 105.01 feet at 1539, with a small recovery in between. Then, by 0609 on 16 June, the depth to water rose again to 23.82 feet. Although the Rigsbee Well exhibited a normal variation in depth to water of approximately 22 feet, the monitoring documented that under “ordinary use” the depth to water occasionally fluctuated more dramatically. The magnitude of these transient fluctuations were up to about four times that of the routine variation. 57