o , ,1 V Lk V 
Bulletin 230 
July, 1917 
The Agricultural Experiment Station 
OF THE 
Colorado Agricultural College 
THE WATERS OF THE RIO GRANDE 
A Contribution to the Hydrology of the 
San Luis Valley, Colorado 
By 
WM. P, HEADDEN 
PUBLISHED BY THE EXPERIMENT STATION 
FORT COLLINS. COLORADO 
1917 
