THIRTY-SECOND BIENNIAL REPORT 



35 



about 12 feet apart. On top was carried two courses of double strand 

 wire, making the fence 7 feet high. The fencing of the flume is con- 

 tinuing. The deer taken out of the flume, if in satisfactory condition, 

 were delivered to the county hospital and later to the unemployment 

 camp located in the vicinity where the meat was used. 



As time has permitted inspections of dams has gone forward to 

 determine if fishways are required. The records at this time show 

 over 1200 dams in the State but undoubtedly this number will be 



-Dep^h of 

 woier m pool 



• L\ p of pori 





tMronce port 



Fig. 7. Portion of concrete fishway without flow of water sliowing typical con- 

 struction and nomenclature. Downstream face of dam at left, stream 

 immediately in front of fishway and not shown in photo. December, 1928. 



considerably increased when the dams under 15 feet in height are 

 included. Information on dams under 15 feet in height is not readily 

 available. Dams of this height and less as well as dams of greater 

 height obstruct migrating fish and proper fishways are needed. 



Work has gone forward with the construction and reconstruction 

 of a number of fishways. Reconstruction has been required where it 

 has been demonstrated that the effectiveness could be improved. In 

 most of these cases, the work would not have been necessary had the 

 original plans furnished by the Commission for the fishway been fol- 

 lowed out when the fishway was first installed. In other instances, 

 changing operation conditions or alterations on the dam made changes 

 in the fishway a necessity. 



The fishway on the dam at Folsom on the American River was 

 reconstructed, being completed in January, 1932. While steelhead had 

 always been able to negotiate this fish ladder, yet some had been lost 

 due to the fact that the walls were not sufficiently high, but with the 

 alterations and improvements carried on the walls have been raised, 

 additional pools provided, the jump (difference of elevation between 

 pools) has been made uniform and certain pools enlarged and a better 

 regulation of water provided. It is believed that this fishway will be 

 effective though it has not as yet been demonstrated with respect to 



