The following data sets and macro variables contain the additional input data that are used in this example:

data hydro_data;
   input hydro $ level unit_cost depth_rate startup_cost;
   datalines;
A  900  90 0.31 1500
B 1400 150 0.47 1200
;

%let min_depth = 15;
%let max_depth = 20;
%let midnight_depth = 16;
%let meters_per_mwh = 1/3000;