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The CWCB restudy resulted in a lOO-year flo~ approximately double the TM-l 100-year flo~. was used for this study. that T" WO, CWCB value TABLE 4. Stream Gaqes Analyzed in TM-I Another gage that had been analyzed by the SCS, the gaqe on Culebra Creek above Rito Seco. was restudied by the CWCB. A few more years of record ~ere available since the SCS analysis. Because of the CWCB's efforts with the Town of San Luis to address some local drainage and flooding concerns. this gage was of particular interest. The CWCB value ~as approximately 10 percent higher than the SCS value. The CWCB value was used in this report. Years of IOO-Year Record (as Flow " Caqe Si.te Drainaqe Area of 1<175) <h' GaC)e ~'r incher.. Cr",ek above 61.0 <q. mi. 32 '" of, MountaIn Home Reservoir Trinchera Creek near 45.0 ". mi. " '36 ," fort Garland Sangre d, Cristo Creek 190.0 <q. mL " 1660 ,', near fort Garland "CO Creek near Fort 32.0 <q. mi. 50 m of' Garland Costil~a Creek above 2 S . I ". mi. ". H6 cfsa Cost1lla Dam. N.M. .. This gage was restudied by the CWCB. The 19nger periOd of record 1ncluded a very large flow recorded 1n 195~ as well as flows recorded after the publication of TM-I. Based on Sl years ot record a 100-year [low of 844 cfs ~as computed. .. o. Actual drainage area has been reduced bv 60 square miles by the SCS to remove area tributary to Sanchez Reservoir. The CWCB added that a.ea back to the total in ~lotting calculatee flows ane In developing the regiona. curve. There are 17 actual Ve3rs of record, but the record has been extended to 51 lears oy correlation with tne otner gage on Culebra Cree~. This ga~e was restudied by the CWCB because a few more years o. record were available $ince the SCS analYsi.s was performed. Based on 58 years o[ record the 100-year f1010 was computed to be ell cfs. ,. -21- -22-