58 ALASKAN MINERAL RESOURCES IN 1904. [bull. 259. 
N. 70° W., parallel with the slate country rock. It has been opened 
at several elevations by three tunnels varying from 50 to 150 feet in 
length, and considerable ore has been stoped out and treated b}^ a 10- 
stamp mill on the property. The ore is reported to average $7.50 
per ton. 
Bauer mine. — This mine is 2 miles southeast of Silver Bay and 1 
mile south of the Cache mine, at an elevation of 1,700 feet. A cross- 
cut tunnel 900 feet in length reaches the main ledge, which is 16 feet in 
width at a depth of about 400 feet. It also cuts several smaller quartz 
veins striking parallel with the formation. The average value of the 
ledge is said to be $4.50 in gold per ton. Assessment work only has 
been done on the property this past year. 
Lucky Chance mine. — This property is situated in a precipitous 
mountain range, 2,500 feet above sea level and 4 miles as the crow 
flies, or 7 by wagon road, from the head of Silver Bay. The 
quartz ledge has a maximum width of 8 feet where it outcrops; but in] 
the tunnel it is not constant in width and appears to merge into a series 
of narrow stringers penetrating the mineralized slate hanging wall. 
The foot wall of graywacke is locally known as diorite, because of its 
compact, massive structure. A 000-foot tunnel follows the ledge ancfl 
connects through a raise with a surface pit. The surface improve-] 
ments comprise a 10-stamp mill, a sawmill, and a water-power plant. 
High values are reported from parts of this vein, and many speci-. 
mens of free gold have been obtained. 
Billy basin. — The discovery of gold-bearing quartz in this basin, 3 
miles east of Sitka, has caused considerable expenditure of money and 
labor. A good trail was made and a sawmill built, but little was dona 
underground. The extent and value of the ore deposit, therefore, cad 
not be determined, as it has only been opened by two small tunnels, 
which expose irregular masses of quartz in the slate-graywacke coun- 
try rock. 
Many other prospects, partly developed, notabty the Lower Ledge, 
Bullion, Free Gold, Liberty Lode, Silver Bay group, and the Boston 
are still held in the above described area, some of which have very 
favorable surface showings, but lack of capital and inefficient man-J 
agement has caused a suspension of explorations for the past few 
years. 
Rodman Bay. — The mineral deposits 5 miles from the head of Ro 
man Bay have excited much interest and undergone large develop 
ments since their discovery in 1898. The basis of operations at this 
place is a mineralized belt of much wrinkled slate several hundred feet 
in width, containing interlaced stringers of quartz and calcite accom 
panied by sulphides carrying gold. Irregular fissures filled with 
quartz are also encountered in the tunnel which crosscuts the deposit 
The slate country rock has been intruded by dikes of diabase in th 
