Gradient. --Estimotes in degrees from hori- 

 zontal, based on observation by various individuals. 



Velocity . --Estimates in feet per second dur- 

 ing normal water levels, based on observation by 

 various individuals. 



Bottom . --A description is given of the com- 

 position such as gravel (range from 1/4 inch to over 

 5 inches in diameter, arbitrary division point), mud, 

 silt, organic materials, broken and water -washed 

 rock, boulders, large rocks, bedrock, etc. , accord- 

 ing to observation by various individuals. 



Low tide location . — The location of the 

 mean low tide point is an approximation and is given 

 only where it falls near good identification points, 

 usually found in restricted stream outlets. 



High tide location. — The mean high tide 

 location generally has been found to correspond to 

 the tree line. Other methods of locating the high 

 tides, such as markers, are described when present. 



Marker distance. --Distance is given in 

 miles along stream course to standard termination 

 point for salmon counting. 



Marker identification. --Description of an 

 artificial marker or of identification feature marking 

 termination point for salmon spawning surveys i>s given. 



Barriers . --Distance and location above 

 high tide point to known barriers, both passable and 

 impassable, are listed. Descriptions are also given 

 when available. 



Tributaries. --Tributaries used by spawning 

 salmon are listed by distance from the mouth of the 

 main stream, by direction, and by importance. 

 Tributaries not used by salmon, but numerous, are 

 mentioned under "Drainage. " 



Salmon schooling areas. --Based on survey 

 records, major salmon schooling areas are listed 

 where specific locations have been observed for an 

 individual stream. 



Salmon schooling areas. --The areas are 

 usually found near high tide where pools often occur. 

 The areas are described with reference to the mean 

 high tidemark. Annual variations in streambeds 

 may alter locations of schooling areas. 



Spawning areas. --Major areas are described 

 with reference to the high tidemark. Location may 

 change with change in stream conditions. 



General notes. --This includes notes per- 

 tinent to the intertidal stream that are of interest 

 and importance in the description of runs. 



Upstream 



Length accessible. --The length given in 

 miles was measured from aerial photographs along 

 the course of the stream to the known upper limits 

 of salmon migration. Where barriers restrict major 

 species but allow more vigorous species to pass, 

 secondary' species limits are given under "Barriers. " 



Gradient. --Slope was estimated in degrees 

 from horizontal, based on observation by various 

 individuals. 



Velocity . --It is in feet per second during 

 normal water levels and is an estimate from obser- 

 vation by various individuals. 



Bottom. --A description is given whether 

 gravel (range from 1/4 inch to over 5 inches in 

 diameter, arbitrary division point), mud, silt, 

 organic materials, broken and water -washed 

 rock, boulders, bedrock, etc. , are present, from 

 observation by various individuals. 



Spawning areos. --Major areas are described 

 by distance above high tide or from a reference 

 point in the stream. 



General notes. --The notes include data 

 pertinent to the upstream areas that are of interest 

 and importance in the description of salmon es- 

 capements. 



Escapement Record 



Statistical area number. 



-The number used 



by the Alaska Department of Fish and Game to des- 

 ignate the statistical area is given on the upper left 

 side of the heading. 



Stream name . --This appears in the center 

 of the first line of the heading. 



Stream number. --The new and old num- 

 bers appear on the right side of the first line of the 

 heading on the first page of the escapement record. 

 The following pages give only the new number. 



Date surveyed. 

 ologically. 



--Surveys are listed chron- 



Miles surveyed . — Distances are given as 

 measured along stream courses to the termination 

 point of the regular survey. Ground surveys are 

 designated by "G" and aerial by "A. " These 

 symbols precede miles surveyed. 



Surveyed by . --Initials of surveying 

 organizations are listed as follows: Alaska Department 

 of Fish and Game, ADF; Alaska Salmon Industry, 

 ASI; Fisheries Research Institute, FRI; U. S. Fish and 



