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KILDUFFr . RMR Aggregates, Inc. <br /> U N U E R G R G U N L Rock Failure Analyses and Stabilization Report <br /> E N GI N E E R I N G.IN C Mid Continent Limestone Quarry <br /> 8. JULY 6 SITE RECONNAISSANCE <br /> A site reconnaissance on the West wall was performed on July 6, 2023 with RMRA staff and Ben <br /> Langenfeld of Lewicki & Associates to evaluate the north limit of the upper limestone beds and <br /> formulate a plan across represented disciplines to determine the optimal quarry headwall extent for <br /> long-term slope stability using the modeled long-term slope geometries discussed above. Photos with <br /> detailed captions from the reconnaissance are included in Appendix F. <br /> A site mapping program was performed to collect structure data on the West wall and to determine <br /> the north limit of the upper limestone beds as they pinch out upslope. The bed thickness and bedding <br /> dip of the two upper limestone beds decreases to the north from the quarry headwall as the forelimb <br /> of the monocline rolls over toward the fold axis. Kirkham et al. map the upper limestone beds as <br /> dipping between 38 degrees near the quarry to 24 degrees toward the top of the hill to the north, <br /> which forms dip slopes and tends to control hillside slope topography. <br /> _The July 2023 site reconnaissance mapped the upper limestone beds from near the ground <br /> event and northward as the beds pinch out and bedding decreases to approximately-. <br /> Appendix F photos document the beds decreasing in thickness at points along the slope. Locations of <br /> bedding dip and dip direction on the top of the massive limestone (contact with the upper limestone <br /> units) and measurement of the presence/thickness of the upper limestone beds are designated on <br /> Figure 3 (provided by Lewicki & Associates) with corresponding site numbers, detailed below from <br /> south to north: <br /> 1 <br /> 1 <br /> 1 <br /> Photos of the site locations are provided in Appendix F. Talus cover and the waviness of the bed <br /> surface limited the ability for high confidence structural measurements at some sites. <br /> Page 14 <br /> 535 16th STREET,SUITE 620 1 DENVER,CO 80202 1 (303)732-3692 1 WWW.KILDUFFUNDERGROUND.COM <br />