116 GRAVEL AND PLACER MINING IN ALASKA. [bull .263. 
The flume of the Jualpa Company," one- half mile northeast of 
Juneau, is shown on PL XV1I1, A. The water is taken from Gold 
Creek, the head gate being 9 by 8 feet. The flume is 4,600 feet in 
length, and has a grade of 1| inches in 16 feet, or 34.3 feet to the 
mile. It is 4 feet 8 inches square, inside measure; the bottom and 
side boards are 2 inches thick, planed inside, and battened with 3- by 
^-inch lumber; there are 4 collars to a box of 12 feet; each alternate 
collar consisting of a 5- by 5-inch sill, 8 feet long; two posts 4 by 
6 inches by 5^ feet high, with a gain of one-half inch into sill, and 
two caps of 2- by 4-inch pieces nailed to the sides of the posts above 
the cover boards. The yokes are braced with 2 by 12's. These col- 
lars have 6-foot centers, and alternately between them are }>okes con- 
sisting of a 3- by 5-inch sill, and two 4- by 4-inch posts, uncapped. 
The flume is covered with boards 1^ by 12 inches by 5 feet, laid cross- 
wise, and nailed. Each box contains approximately 425 board feet of 
lumber. The cost of the flume is said to have been $2.20 per foot, or 
$11,616 per mile, including lumber and labor. This did not include 
the cost of shooting rock for the flumeway, which was as high as $5 
per foot in places. A head of 225 feet is obtained, and the capacity 
of the flume is said to be 5,000 miner's inches. 
The pressure box to which the flume leads is 12 by is feet by 11 
feet deep. It is built of 1^-inch lumber, and has collars of 8- by 8-inch 
timber. The pipe at the intake end is 36 inches in diameter. 
In building flumes about Juneau trestling frequently has to be 
resorted to, thus adding greatly to the expense. In general it may be 
said that the cost of building a 4-foot flume in the So <th Coast prov- 
ince will not fall greatly below $10,000 per mile, and will occasionally 
be double this amount. 
For small flumes, Bowie gives the following specifications:^ 
Specifications for flu in r 2\ feet wide, 2\ feet deep; 12-foot box. 
Feet. 
3 caps, 4 feet by 3 by 4 inches 12j 
6 posts, 3 feet by 3 by 4 inches 18 
9 planks, 12 feet by 1| by 6 and 12 inches 135 
3 sills, 4i feet by 4 by 4 inches 18 
2 stringers, 12 feet by 4 by 6 inches 48 
6 battens, 12 feet by 3 inches by 1 inch 14 
1-foot plank, 12 feet by 10 by 1\ inches 15 
Total lumber in one box 264^ 
Number of boxes per mile, 440. 
a Recent information (Mining and Scientific Press, December 31, 1904), states that elaborate prepa- 
rations for operating this property were made the last summer. These include the interception 
of the water of Gold Creek above the property by a dam, and its diversion to a flume to carry it past 
the hydraulic pit. The flume is 20 feet wide by 9 feet deep, and 4,250 feet long, 2,250 feet being tres- 
tled. It contains 1,200,000 feet of lumber, 6,000 linear feet of hewed timber, and 20 tons of nails and 
.bolts. 
&Op. cit., p. 149. 
