56 ALASKAN MINERAL RESOURCES IN 1906. 
MINES NORTH OF JUNEAU. 
SALMON CREEK. 
At the mouth of Salmon Creek, the first stream north of Juneau, is 
the Wagner group of claims, located on a mineralized basic dike from 
8 to 12 feet wide, cut by numerous quartz veinlets. This corresponds 
in character to the exposures on the Boston group mentioned above 
and lies in the same line of strike. Three other similar dikes were 
observed outcropping at different elevations on the mountain slope 
above. A total of 675 feet of tunneling has been driven 250 feet along 
the vein and 425 feet crosscutting the country rock. A small 2-stamp 
mill has been installed for test purposes. 
MONTANA CREEK. 
On McGinnis Creek, the eastern branch of Montana Creek, are the 
properties of the Mansfield Gold Mining Company, consisting of both 
lode and placer claims. These properties are located on the north- 
eastern portion of the wide mineral belt, but all attempts to work 
either placer or lode deposits have failed, mainly because of their 
lowness of gold values. During most of the year this property was 
idle. 
There has been no change in the mining conditions or develop- 
ments on the Montana Basin group of claims at the head of the creek. 
Small amounts of assessment work were done and some additional 
surveys made. The inaccessibilitj^ and distance from salt water 
appear to be the chief cause for their nondevelopment. 
WINDFALL CREEK. 
Just above the divide from Montana Creek, at the head of Windfall 
Creek, is the Smith & Heid group of claims, located upon low-grade 
belts of mineralized schist and greenstone, traversed by quartz vein- 
lets in which the gold values are irregularly distributed. There was 
no renewal of interest in this property during the year. 
The first of May the Detroit- Alaska Mining Company began opera- 
tions on its placer claims on the lower portion of the creek, half a 
mile above Windfall Lake. Work was continued at intervals until 
September 15, but owing to lack of water the actual number of days 
of gravel washing was only 28. A total of 1,000 cubic yards was 
sluiced. The gravels are of moderate grade and, with a sufficient 
water supply, should yield profitable returns. 
PETERSON CREEK. 
On the Peterson group of claims work has been continuous on the 
gold-quartz veins by the owner and a few helpers. A small testing 
mill has been erected, and it is reported that from this mill sufficient 
gold bullion is recovered to defray mining expenses. 
