year	max annual flow
1898	4680 
1900	3830 
1909	10000
1911	25000
1913	3700 
1914	8330 
1915	4430 
1916	6140 
1917	8460 
1918	4400 
1919	5600 
1920	9260 
1921	9300 
1922	7800 
1923	4680