- 7 - 



The recorded flow volume of the East Poplar River at the International 

 Boundary for 1988 was 2,560 dam 3 , or 23 percent of the mean annual 

 flow since the completion of Morrison Dam in 1975. 



Quality Control 



A set of simultaneous streamflow measurements was made on the East 

 Poplar River at the International Boundary on May 17, 1988, by per- 

 sonnel of Environment Canada (EC), and the U.S. Geological Survey 

 (USGS). Measurement results were within allowable differences. The 

 results are shown in Table 2. 



Table 2. Simultaneous Streamflow Measurement Results 



Notes 



1. Section A is the GEOWEB measuring section; Section B is a 

 "head" determination at the 90 V-notch control applied to 

 a theoretical equation. 



2. Measurements at Section A were made with a Pygmy meter. 



3. Original work by USGS was done in English units and 

 converted to metric. 



Reservoir Storage 



Cookson Reservoir was near 80 percent of the full-supply volume 

 (43,400 dam 3 ) for the first four months of the year, but contents 

 decreased to 61 percent of capacity by December 31 because of much 

 below normal precipitation. Elevations and contents for selected 

 dates are given in Table 3. 



