furington] GENERAL STATEMENT OF CONDITIONS. 27 
CLASSIFICATION OF ALLUVIAL GOLD DEPOSITS IN ALASKA. 
The alluvial gold deposits of Alaska may be classified as follows: 
Classification of alluvial deposits in Alaska. 
Creek placers . . 
Hillside placers 
Bench placers 
River-bar placers. 
Gravel-plain (t u n <1 r a) 
placers. 
Sea- beach placers 
Lake-bed placers. 
Placers in, adjacent to, and at the level of small streams. 
Placers on slopes, intermediate between creek and bench 
claims. 
Placers in ancient stream deposits from 50 to 300 feet 
above present streams. 
Placers on gravel flats in or adjacent to the beds of large 
streams. 
Placers in the coastal plain of Seward Peninsula. 
Placers adjacent to the seashore to which the waves have 
access. 
Placers accumulated in the beds of present or ancient 
lakes; generally formed by landslides or glacial dam- 
ming. 
The methods of working the alluvial gold deposits are shown in the 
following table: 
Methods of working alluvial gold deposits of Alaska. 
Class of placers. 
Method of working. 
Creek placers 
Hydraulicking. 
Hydraulicking with hydraulic elevator. 
Dredging. 
Open cutting, separate^ stripping, and shoveling in.& 
Open cutting, separate stripping, and horse scraping. 
Open cutting, separate stripping, and steam scraping. 
Open cutting, separate stripping, wheeling, and cable tram. 
. 
Open cutting, separate stripping, and steam shovel. 
Open cutting, separate stripping, track and incline system. 
Open cutting, separate stripping, track system, with hy- 
draulic elevator. 
Open cutting, separate stripping, track system, with der- 
ricking. 
Open cutting, separate stripping, skidding, with derricking. 
Shaft, drifting, and timbering. 
Shaft, thawing, and drifting. 
Hillside placers ■ 
By the same methods as creek claims. 
a Charged to independent account. The stripping generally consists of frozen "muck," a mixture 
[>f silt and ice, which is ground-sluiced off. 
'. *> Includes rocker work. 
o Detritus varying from 3 to 60 feet in thickness. 
