Laserfiche WebLink
<br />October 5, 1989 <br />To: National king Coal, Inc. <br />Re: Quarterly Subsidence Monitoring <br />The third quarterly subsidence survey check was made on September <br />28 and 29. The relationship between subsidence points S1, S2, <br />S3, and S4 were checked both laterally and vertically. No <br />movement was detected. <br />Because of pillaring activity in Section 32, three additional <br />subsidence points have been established in the central portion of <br />the N2/SW4 which will also be checked in the fourth quarter. <br />I will also establish four subsidence points in the E2/NE/4, <br />Section 31, which will be included in the first quarterly report <br />of 1990. <br />Cli Schmid, P.L.S. 11373 <br />