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The SEDCAD culvert and ditch sizing utility designs for ditch DSLY-7 and culvert <br />CSLY-8 use 5.00 cfs as the peak flow. However, the drainage basin routing diagram on <br />Map 1 E shows that drainage basins 47B and 49A4 drain into ditch DSLY-7 and culvert <br />CSLY-8. The SEDCAD drainage basin peak flow designs show peak flows of 4.87 cfs <br />and 5.10 cfs for drainage basins 47B and 49A4 respectively. It would appear that the <br />peak flow to be used in the ditch and culvert designs should be around 4.87 cfs + 5.10 cfs <br />or about 9.9 cfs. Please comment. <br />6. It appears that drainage basin 48A needs to be annotated on Map 1 E. If you agree, please <br />provide a revised Map 1 E. <br />7. Referring to Map 1 E and Map 54B, what prevents runoff from the north-facing slope of <br />drainage area 42A1 from entering ditch DSG-1? <br />Attachment 44I~ 1 shows that culvert CSLY-2 has been omitted. However, Map 54 still <br />shows culvert CSLY-2. Please reconcile this difference. If culvert CSLY-2 exists, please <br />locate or provide the revised SEDCAD hydrology designs for culvert CSLY-2 for the <br />Sylvester Gulch 100 year-24 hour peak flow drainage. <br />9. The peak dischazge for culvert CSLY-12 is shown on Attachment 44E-1 to be 12 cfs. <br />However, the SEDCAD drainage basin peak flow designs show the peak flow to be 2.32 <br />cfs. Please reconcile this difference. <br />10. The SEDCAD ditch sizing utility designs for ditches DSG-I, DSG-2, DCW-6A, DCW'- <br />6B and DCW-6C show that the ditches will be shotcreted. However, the shotcrete <br />designation does not appear next to these ditches on Table 44E. Please add these <br />designations to the table. <br />11. Table 44E lists culverts CCW-lA and CCW-1B. However, only culvert CCW-1 appears <br />on Map 54B. Please explain. <br />12. Please provide the elevation-dischazge tables and the elevation-area-capacity-discharge <br />tables for the SEDCAD runs for pond SG-1. <br />13. The SEDCAD runs for pond SG-1 shows that the area for basin 37C is 2.44 acres. <br />However, Map 1 E shows that the azea is 1.8 acres in size. Please reconcile this <br />difference. <br />14. Please provide the Non-Pond Structure Input/output Table, containing [he grass filter <br />inputs, for the SEDCAD runs for the small area exemptions at Sylvester Gulch. <br />15. If you agree, for the sake of clarity, please show the entire 3.0 acre substation as an SAE <br />on Map 54B. <br />2 <br />