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f <br />ments taken in the actual as built ditch after the severe <br />precipitation event, shows an actual discharge flow in the <br />South Collection Ditch of 122.22 cfs with triangular ditch <br />dimensions of 14.4 foot top width and 1.8 foot depth. Prior <br />to being overcome by the excessive water and the breaching, <br />the oversized South Collection Ditch actually functioned and <br />passed a water discharge in excess of 17 times the design <br />discharge for which the ditch was hydrologically designed. <br />These numbers are tabulated on Table 2. <br />4. Lower Goodspring Creek Water Monitoring Site <br />The Lower Goodspring Creek surface Water Monitoring Site has <br />served Colowyo as the location for monthly and quarterly water <br />quality sampling and flow measurements since 1982. A 4 foot <br />Parshall Flume has given flow measurements showing that from <br />1982-1992 the average flow for Goodspring Creek is 5 cfs with <br />a one time measured maximum flow of 44 cfs. High water flow <br />calculations at this same site the morning after the severe <br />precipitation event of May 16, 1993, showed a calculated flow <br />of 153 cfs which is in excess of three times the flow of the <br />largest flow (44 cfs) recorded in the past ten years of <br />monthly record keeping. <br />In light of the factual evidence presented above, Colowyo <br />contends that the failures cited in NOV C-93-077 are attributable <br />to a rainfall event of tremendous proportions and not due to non- <br />compliance, faulty design, or lack of maintenance on diversion <br />structures by Colowyo. <br />Colowyo respectfully requests that NOV C-93-077 be vacated. <br />Please contact me should additional information be necessary. <br />Sincerely, <br />Juan Garcia <br />Hydrologist/Environmental <br />Engineer <br />JG/gf <br />xc: R. G. Atkinson <br />Central Files <br />