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3. Modifications to Approved Plans <br />A) Sump #1 <br />The principal spillway pipe and emergency spillway was installed to allow discharge back to the <br />access road, which was not in the design. Due to elevation problems with the principal spillway pipe, <br />this can stay as installed, since it is a very small amount of flow and can be controlled through the <br />valve. The emergency spillway must be moved, as described in Section 4. <br />B Sum #4 <br />Based on an inspection in June of 2010, it was realized that the original plan to drive a road and sump <br />in the marble block area was not feasible due to the steepness of the slope and the fact that blocks <br />could not be removed without additional blocks falling down, causing safety concerns. Instead, a <br />concrete lined channel was built to capture runoff from the block area and direct the flow to Sump 4, <br />which was relocated just below the blocks, as shown on the revised Map C-2, enclosed in this report in <br />Appendix B. <br />Although this plan involved over 90 cubic yards of concrete and considerable work in making forms <br />for the concrete, the channel is sound and has already worked well for a rain event. The channel is <br />approximately 6 inches deep and approximately 4 feet wide. See pictures attached in Appendix A. <br />The ditch is more than adequate to handle the peak flows from such a small drainage area. <br />Yule Quarry As Built Report 2010 8