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<br /> <br />maxiJnum of 250 feeto Water levels will be low from August to April <br /> <br />with a sharp rise from April to June followed by the rapid disoharge <br /> <br />of irrigation water whioh will reduoe the reservoir to minimum level <br /> <br />in September, Drawdown will be as muoh as 50 feet in some months <br /> <br />and rises will be of the same magnitude. <br /> <br />c; <br /> <br />390 As based on the operation study, the reservoir will be <br /> <br />empty about 3 times in 10 years. Within the 384-month period, the <br /> <br />dry reservoir bed oonditions totaling 23 months would have ooourred <br /> <br />several times in August and September as well as during 2 winters. <br /> <br />Water level fluotuations will expose large areas of the reservoir <br /> <br />bottom during oertain months of the year and thie oondition will be <br /> <br />a disadvantage to the establishment of trout-food organisms (Plate <br /> <br />5) . Prolonged periods of low water may permi t a liJni ted development <br /> <br />of vegetation in some areas whioh, upon inundation, will aid fishery <br /> <br />oonditions somewhat by providing improved food a!ld oovero Although <br /> <br />the frequency of a. low or empty reservoir will be such that maintenance <br /> <br />of an adequate fish population to attract fishermen is expeoted to be <br /> <br />a problem, a favorable aspect of low water periods or a oomplete draw- <br /> <br />dawn is the feasibility of oontrolling rough fish, especially suckers <br /> <br />which are oonsidered to be a major problem of reservoir managemento <br /> <br />Utilization <br /> <br />Stream Fishery <br />40. The projeot will reduoe the quality of fish habitat whioh <br /> <br />in turn is expeoted to be refleoted in lowered fisherman utilizationo <br /> <br />Periodio inundation of the Rio Grande and its tributaries within the <br />. <br /> <br />reservoir si te will make these streams less aocessible and lese <br /> <br />utilized, There will be some fishing in the I-mile reaoh beleR the <br /> <br />21 <br /> <br />11.67 <br /> <br />