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<br />.... <br />o <br />o <br />o <br />.... <br />III 10 <br /> <br />... <br />o <br />o <br />o <br />;' 10 <br /> <br />... <br />o <br />o <br />o <br />;' 10 <br /> <br />Figure 3 <br />Extension of Grand Canyon Boating Season <br /> <br />. <br />r <br /> <br />30 <br /> <br />. <br />. <br /> <br />. <br /> <br />> <br /> <br />20 <br /> <br /> <br />r <br /> <br />. <br />> <br />r <br /> <br />0 <br />Jan Feb Mar Apr May June July Aug Sept Oct Nov Dee <br /> (a) High Flow Year (1957) <br /> . . <br />30 <br /> Dai y Max mum <br /> <br />~~: <br /> <br />l; <br />~ <br />~ <br />,... <br /> <br />20 <br /> <br /> <br />~ <br />>, <br />~; <br />0' <br />f <br />r.. <br />,> <br />t. <br /> <br />~:it <br /> <br />~ ": <br /> <br />l.~. <br />,. <br />,. <br /> <br />o <br /> <br />Jan Feb Mar Apr May June July Aug Sept Oct Nov Dee <br />(b) Moderate Flow Year (1948) <br /> <br />!~ <br /> <br />, <br />~... <br />.:::.; <br />i~~~ <br />~~ <br />I..~ <br /> <br />30 <br /> <br />;:;.;. <br /> <br />Dai y "lax mum <br /> <br />" <br /> <br />20 <br /> <br /> <br />o <br /> <br />Jan' Feb Mar Apr <br /> <br />Aug Sept Oct ~v Dee <br /> <br />(c) low Flow Year (1954) <br /> <br />g <br />