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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />Questions on A WA study of Cherry Creek PMP <br />I Question topic and A W A Actions <br /> <br />Ouestions with Corps Concurrence <br /> <br />A W A action required <br /> <br />1. <br />7. <br />9. <br /> <br />None <br />None <br />A W A will revise p62 to show Total <br />Adjustment vs Pseudo-Adiabatic <br />A W A will revise the report <br />A W A will revise the report <br />A W A will revise the report <br />A W A will revise the report <br />A W A will revise the report <br />None <br />None <br /> <br />16. <br />17. <br />18. <br />21. <br />22. <br />28. <br />29. <br /> <br />Questions with A W A Action and A W A Action Taken <br />2. NWS list storm elevation as 5,800 feet based on Figure 3.4 and it appears the Penrose <br />Center. The Corps Storm Studies Data Sheet list the storm center at observation <br />location No.3 northwest of Pueblo. The following are elevations of each center <br />I <br />determination: <br />HMR 55A Figure 3.4 <br />Actual elevation of the Penrose center <br />Actual elevation of the Pueblo center <br /> <br />5,800' <br />5,415' <br />4,960' <br /> <br />A W A action: A W A has revised the 1921 storm analysis as Corps requested. The NWS <br />isohyetal pattern was digitized and used for transpositioning to the Cherry Creek <br />basin. The largest report rainfall was at location No.3 so the elevation associated <br />with that location (5,000') is used. <br /> <br />I <br />3. A W A used an upper limit for the in-place maximization factor of 1.5. HMR 55A <br />using 1.5 east of the Orographic Separation Line. HMR 55A and HMR 57 use 1.7 for <br />orographic regions. This limit was applied because of inadequacies of the storm <br />sample in orographic ~egions. The storm sample for this study is not inadequate but <br />used a relatively large number of storms that occurred in relatively close proximity. <br />Careful examination ofHMR 55A Figure 3.1 shows that the Orographic Separation <br />Line is close to but m~stly west of the Cherry Creek drainage basin. <br /> <br />A W A Action: The Corps requested that the upper limit be increased but using the above <br />discussion, A W A has ~etermined that 1.5 is the appropriate upper limit for use in this <br />study. <br />