PEOGKESS IX BIOLOGICAL, INQUIRIES, 193 3 383 



of <rreat value to the fishery resources of the couutry that have 

 •rotten Avell under way will have to be abandoned for lack of rej^ular 

 appr()j)riations for their continuation. One of these projects is the 

 investi<iati()n of stream pollution and means of neutralizing^ or 

 properly utilizin<x waste materials now rendering large portions of 

 our streams unlit for aquatic life. 



With the construction of dams on the Columbia Kiver, the salmon 

 runs of that watershed will be seriously menaced. Continued ob- 

 servations on the eifectiveness of fish protective works at the Bon- 

 neville Dam will be required after the expenditure of the Public 

 Works allotment, and these studies must be coordinated with similar 

 studies at other dams now built or under construction. This work 

 should be carried on for at least a 10-year period by regular an- 

 nual appropriations. 



With Public Works funds, a favorable beginning will have been 

 made in planning a rational stocking policy for the waters of the 

 public domain included in the national forests. Less than one- 

 sixth of the total forest area can be covered, however, with the al- 

 lotment during the coming year and, forming as it does the very 

 foundation of fishery conservation in interior waters, should be con- 

 tinued on the present scale until the entire area of the national 

 forests has been covered. This work likewise should be supported 

 by annual appropriations commensurate with the importance of 

 the undertaking. 



o 



