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Mr. Rob Zuber <br />October 31, 2014 <br />Page 2 <br />Response: Table 2.05.3(4) -7 -1 has been corrected to demonstrate that <br />NHN -001 West Ditch, Segment 2, is a trapezoidal ditch as noted by the <br />Division. Moreover, the SEDCAD demonstration in Section 2.4, Appendix <br />2.05.3(4) -7, has been updated with Segment 2 as a trapezoidal ditch. <br />Segment 7 of the NHN -001 East Ditch was reevaluated in the field, and it <br />was found to have very minor discrepancy of three inches in total depth in a <br />small section of the overall segment. Even though the discrepancy was <br />minor in nature, Segment 7 was reconstructed to ensure adequate cross - <br />sectional area was achieved as required. Furthermore, the SEDCAD <br />information presented in Section 2.4, Appendix 2.05.3(4) -7, has been <br />updated with the constructed ditch configurations for Segment 7. Map <br />2.05.4.3(7) has also been updated to correctly reflect the as- constructed <br />condition of Segment 7. <br />2. Map 2.05.3(4) -7 shows an EPDM liner at the steep portion where the <br />channel meets the pond. However, Table 2.05.3(4) -7 -1 indicates that half <br />culverts are used on these steep slopes. The half culvert was also seen in the <br />field. Please revise the map or clarify this potential discrepancy. <br />Response: The EPDM liner shown on Map 2.05.3(4) -7 has been removed. <br />Please see Table 2.05.3(4) -7 -1 for the appropriate channels linings for NHN- <br />001 East and West Ditches. <br />3. The drainage areas and topography on Map 2.05.3(4) -7 are somewhat <br />confusing. Some of the drainage areas have incomplete polygons, namely <br />West 3 and East 1. North of sub -basin East 1, the topography does not <br />agree with the drainage boundary. Is it correct for the drainage boundary <br />for the sub -basin that drains directly to the pond to extend east of the hilltop <br />signified by the 5775 contour? Please revise the map to accurately show the <br />drainage areas and topography. <br />Response: The West 3 and East 1 polygons on Map 2.05.3(4) -7 have been <br />revised to clearly delineate their drainage areas as requested. In addition, the <br />drainage boundaries east of the hilltop (5775 contour) have been corrected <br />for the East 1 sub - drainage basin as requested. <br />4. In the disclaimer for Appendix 2.05.3(4) -1, the ARCADIS report, there is a <br />note that information on "specific " segments of the ditches draining to Pond <br />NHN -001 is superseded by the new appendix (Appendix 2.05.3(4) -7). <br />However, the Division understands that all of the segments of these ditches <br />AN EQUAL OPPORTUNITY / AFFIRMATIVE ACTION EMPLOYER <br />A Touchstone Energy °Cooperative <br />