the first year, Charles B. Wade was in charge of the field program,, assisted 

 by Kenneth Legg and Joseph Bender, In June, 19U7, Leo F. Erkkila assumed 

 charge of the field program, and assisted by Bernard R. Smith, held this 

 capacity until termination of the study. Other personnel active in the field 

 program were: Millard H. Coots, Louis H. Carufel, Jr., Eugene S. Cupernell, 

 William A. Rush, and James R. Thrailkill. Stanford office personnel oarticipat- 

 ing in the studies were Reed S. Nielson and Oliver B. Cope. Irene L. Krieshok 

 gave valuable assistance in the preparation of the report. 



Throughout the study, contact has been maintained with the U. S. 

 Bureau of Reclamation, the agency which financed the bulk of the study, 

 and the California Division of Fish and Game, whose biologists gave in- 

 valuable advice and assistance in many phases of the work. The U. S. 

 Bureau of Reclamation supplied engineering assistance, maps, and data 

 relative to flow and project operation. The U. S. Corps of Engineers 

 provided certain funds which helped support the study during its first 

 year. 



OBJECTIVES 



When the study was inaugurated in 19^6, the basic objective was 

 recognized as being the development of measures to protect and manage 

 the fishery resources in the Sacramento -San Joaquin Delta in relation to 

 the Delta Cross-Channel, the Tracy Pumping Plant, and their appurtenant 

 works. In order to obtain the essential information necessary for meeting 

 the main objective, the following plan of study was organized as a guide 

 for operations planned for a five year period, beginning in 19U7: 



1. Learn the biology, magnitude, and composition of the fishery 

 resources that depend upon or utilize Delta waters. 



2. Determine the present hydrodynamics of the Delta. 



3. Determine the details of the proposed project and its operation. 



h. Determine the possible effects of project operation on present 

 hydro dynami c s . 



5. Determine the effects on fishery resources of hydrodynamics 

 altered by project operation. 



6. Devise ways and means to mitigate damage to, or improve condi- 

 tions for, present fishery resources. 



7. Assess the degree of success of ways and means, adopted for the 

 protection and improvement of fishery resources. 



Termination of the project in 19h9 made impossible completion of any 

 of the lines of investigation listed above. However, considerable infor- 

 mation was obtained on several of the investigations; on other phases, 

 very little information wac obtained. This report presents a summary 

 and discussion of those findings on which reliable data have been obtained 

 and which are pertinent in resolving the main problem. 



