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Frequency (year) Depth (inches) 2 1.01 5 1.43 10 1.73 50 2.40 100 2.70 500 3.40 I I I I I I I I I I I I I I I I I I I maintain an existing pond (Pond 3, per Hurst and Associates' field survey), just east of the Goodhue Ditch. Hurst and Associates field information is included in the appendix. That pond is also included in the TEA model. Letters from Erie, Lafayette, and Louisville regarding storage facilities are included in Appendix J. Volumes and areas of the ASI and TEA models were compared to confirm that no drainage basins were inadvertently lost or gained from the original FHAD model. Those calculations may be found in the appendix. Figure 1 depicts the ASI drainage basin map as modified by TEA. Figure 2 depicts the overall modified SWMM schematic, while Sheets 1 and 2 (in back pocket) contain the Hurst and Associates SWMM basin map and flow diagram on the Indian Peaks Golf Course. TEA modeled four storm events; the 10, 50, 100, and 500 year storm. The 10, 50, and 100 year rainfall depths are from the ASI sudy, the 500 year event was extrapolated from ASI published values. The one-hour rainfall depths listed in Table 1 below were used in the CUHP model: TABLE 1 One-Hour Rainfall Depths for Zone 1, Boulder County TEA's CUHPEPC models are named: bh01 OfiJ.chi,.chd,.cho - 10 year (input, results for UDSWM386, and output) bh050fi.i.chi,.chd,.cho - 50 year bh100fiJ.chi,.chd..cho - 100 year bh500fii.chi,.chd..cho - 500 year Hydrographs fro CUHPEPC were input for the following UDSWM386 models: bh010fiJ.sin, .sot - 10 year (input, output) bh050fi3.sin, .sot - 50 year bh 1 OOfiJ.sin, .sot - 100 year bh500fiJ.sin, .sot - 500 year Printouts for the 1 00 year flow are included in the appendix. Flows are summarized in Table 2. Flow profiles are depicted in Figures 3, 4, and 5. 2