188 ALASKAN MINERAL RESOURCES IN 1906. 
been made of the publications of Prindle, a who has already described 
the general features of the geology and topography, and these will 
not be redescribed except so far as is necessary to an understanding 
of the description of the placers. The uniform courtesy and hospital! 
ity shown to the writer throughout the region greatly aided the invea 
tigation. 
STATISTICS. 
Data in regard to the gold production of this region are exceedingly 
scant, but the following estimates are based on the best evidend 
available. The error in the tables may be as great as 10 or 15 per cent. 
Approximate value of gold production of Birch Creek district, 1894-1906. 
1894 $10,000 
1895.... 150,000 
1896 700,000 
1897 500,000 
1898 400,000 
1899 250,000 
1900 250,000 
1901 200,000 
1902 $200,000 
1903 200,000 
1904 200,000 
1905 200,000 
1906 300,000 
3, 560, 0( 
Estimated value of gold production of Birch Creek district, by creeks. 
Deadwood Creek b $700, 
Mastodon and Mammoth creeks & 2,060, 
Eagle Creek b 600, 000J 
Other creeks b 200, 000 
3, 560, 000 
The first three areas in the foregoing table continue to be the largest 
producers, probably in about the ratio of total output there given. 
Of less present importance, but also productive, are Harrison, Miller 
Greenhorn, W oodchopper, and Fourth of July creeks. Gold has also 
been found on a number of other streams which have yielded only a 
small production and are too numerous to mention. It is estimatec 
that values have thus far been found along a total length of 23 miles, 
but it is impossible to stale what proportion of this pay streak has 
been worked out. There are but few claims in the entire district 
that have 4 been entirely worked out, and, in fact, even these will, to 
a certain extent, probably be reworked by improved methods. In 
1906 there were about 200 men at work in the district on about 60 to 
100 claims/' Most of the mining was by pick and shovel methods, 
but one small hydraulic plant was operated on Harrison Creek and 
another with a steam scraper on Mastodon Creek. There were also 
oPrindle, L. M., The gold placers of the Fortymile, Birch Creek, and Fairbanks regions: Bull. U. S 
Geol. Survey No. 251, 1905; Description of the Circle quadrangle (one of a series on the Yukon-Tanana 
region) : Bull. U. S. Geol. Survey No. 295, 1906. 
& With tributaries. 
c Claims are 500 feet long in Birch Creek district. 
