CHAPTER II. METHODS 



The methods used during this survey were, whenever, possible, 

 euiopted from procedures outlined in "Standard Methods" (1960) , or Welch 



Field Investigations 



Sampling Stations 



The locations of sampling stations are shown on Plate 1. De- 

 tailed maps showing locations of individual sanqjles from each of the 

 stations are on file at the Department of Fish and Game Field Station 

 at Sacramento. Station descriptions are summarized below; unless other- 

 wise stated, stations are on the Sacramento River. 



Station 30^ ♦? (Above Spring Creek) ♦ Keswick Reservoir near 

 Matheson. Samples from 36 to 50-foot depths near banks. Fine sand and 

 silt, frequently with large amounts of organic debris. 



Station 297.7 (Above Redding Diversion Dam) . Samples from I.5 

 to 11-foot depths. Large cobbles. 



Station 295.2 (Redding F & G Station l) . Shallow pits in flood 

 plain. Samples from 9 to 13-foot depths. Sajidy silt with organic debris 

 overlying cobbles. 



Station 29U.O (Above Cypress Avenue Bridge, Redding) . Samples 

 from 1.5-foot depth in riffle area near bridge and along right bank O.3 

 mile upstream. Large cobbles with some sand. 



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