2020-04-08_REVISION - C1981035 (2)

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Tom Bird C1981035 TR29 Page 2 of 4 April 8,2020 The following questions pertain to Appendix 11(2) 7) In the Drainage Basin ID Table, please explain why the facility areas are described as forest. Are curve numbers of 80 appropriate? 8) Related to the Ditch Capacities table,please address the following questions and comments. a) ID-7 has a bottom width but a triangular shape. b) It is unclear if ID-7 flows to ID-8 (per Structure Networking), Basin E1 (per"Station" column in Ditch Capacities table), or Culvert C21 (per Map King II-007A)? Please check and edit as necessary. c) ID-8 has a bottom width but a triangular shape. d) Where is ID-9 on Map King II-007A? Please revise text and/or map, as necessary. e) For ID-9, the depth in the SEDCAD printout(0.28') does not match the required depth in the Ditch Capacities table (0.82'). One of these appears to be a typo. 9) Related to the SEDCAD run that includes Pond 1, DRMS identified some apparent errors. When comparing the Structure Networking table and Map King II-007A, it is unclear how some model elements fit together. For example, is Structure 950 culvert C21, or is it ditch ID-5A? It also appears there are mistakes with the portion of the model that is not near the proposed portals. For example, Structure 944 may be culvert 17A or it may be ID-0. Please check the elements of the model and how they link together, and edit as necessary. 10)Related to the SEDCAD utility runs, please explain why channels L', M', and N' are not included in the SEDCAD run with the other CWD-2 channels. Also, there appear to be discrepancies (possibly typos) in the utility runs when compared to the Ditch Capacities of the current PAP. Please explain the following, and revise as necessary. a) For segment L' of CWD-2, the bottom width and slope have changed significantly. b) For segment M' of CWD-2, the slope has changed significantly.