. The Yukon Territory, its history and resources . and a half miles above its dam was built by the lessees of the Matson and DoyleConcession, and has a capacity of fifty-eight million area within which this water is accumulated is betweensix and eight square miles. The water from the dam is con-ducted along the left limit of Adams creek, and used under apressure of 175 feet on the hills and benches on the left limitof Bonanza between the mouth of Adams and Boulder creek,;i distance of thieo miles. The water is conducted entirelyby flume, which is 24 by 36 inches, having
. The Yukon Territory, its history and resources . and a half miles above its dam was built by the lessees of the Matson and DoyleConcession, and has a capacity of fifty-eight million area within which this water is accumulated is betweensix and eight square miles. The water from the dam is con-ducted along the left limit of Adams creek, and used under apressure of 175 feet on the hills and benches on the left limitof Bonanza between the mouth of Adams and Boulder creek,;i distance of thieo miles. The water is conducted entirelyby flume, which is 24 by 36 inches, having a capacity of 600inches of water. On Adams hill three monitors of 2^, 3 and 4iiKli nozzle diameter arc usetl. This dam cost approximately$75,000. Ill lUOC) the Vukii (niisdlidated Gold Fi(dds (umpanycommenced the construction of an immense ditch from a pointon the main Twelvemile river to Grand Forks, which issituated at the junction of Bonanza and T^ldorado creeks. TheWilier to l>e conveved bv tins dilcli, which is hctween 60 and 70. 0) 3 o be c So ?^3 c B O 32 59 miles ill Iciiiitli, is iiilciidcil to mine l>v llie livdiMii lie iinieossthe hill and heuch gravels of Bonanza, Ehlorado ami Hunkercreeks and their tributaries. The width of the ditch at thebottom is I::! foot and at the top 20 feet; the greatest depth r»fexcavation being- 12 feet, and an average depth of 4 will be 25 miles of flume and pipe, the cost of flumewill be $20,000 per mile, and about 40 miles of diteli. Mhichis excavated at a cost of $8,000 per mile. Steam shovels areused for excavating, and the cost is 15 cents per cubic yard. Thequantity of timber in tlie tlnme is 1,000 feet in everv 10feet of flume. The flume is 7 by <; and has a capacity of 10,000miners inches. The piping consists of heavy steel pipes wherelong and deep depressions have to be crossed, and redwoodstave pipes where the pressure of the water does not exceed125 feet. The inverted syphon to be installed a
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