 | Augustus Jesse Bowie - 1878 - 108 strani
...crest. The water passing over the dam will fall on bare granite bedrock, and thence down a steep gorge. From past experience in the use of cedar timber, it...twenty-five to thirty years, and possibly longer. Its cost has been $15,000. HYDRAULIC WASHING. The tunnel or opening for the sluices having been completed, the... | |
 | California. Legislature - 1883 - 497 strani
...has been found by long experience to be the very best. REPORT OF THE STATE MINERALOGIST. steep gorge. From past experience in the use of cedar timber, it...twenty-five to thirty years, and possibly longer. Its cost has been $15,000. Storage Reservoirs. When water is not taken from running streams the mines are dependent... | |
 | Augustus Jesse Bowie - 1885 - 364 strani
...above Section across Ravine. Section through waste dam. 92JCA Water mar1e.^±j*,. «^: n)iJt. TFaterma BEDROCK FIG. 6. BOWMAN WASTE DAM. datum line, against...and possibly longer. Its cost was $15,000.* D6bris Dams.—Debris dams are obstructions placed across the beds of streams for the purpose of holding back... | |
 | Augustus Jesse Bowie - 1885 - 360 strani
...crest. The water passing over the dam falls on bare granite bed-rock, and thence down a steep gorge. From past experience in the use of cedar timber it...the navigable streams and damaging the land in the valleys below. They may be placed either in the mountain canons or in the valleys where storage room... | |
 | 1882 - 532 strani
...water passing over the dam will fall on bare granite bedrock, and thence flows down a steep gorge. From past experience in the use of cedar timber, it...structure will be from twenty-five to thirty years, and possiblv longer. Its cost has been $15,000. , Storage Reservoirs. When water is not taken from running... | |
 | California, California. Legislature - 1883 - 994 strani
...water passing over the dam will fall on bare granite bedrock, and thence flows down a steep gorge. From past experience in the use of cedar timber, it...twenty-five to thirty years, and possibly longer. Its cost has been $15,000. " ' " , Storage Reservoirs. When water is not taken from running streams the mines... | |
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... tons. It is believed that the structure is sufficiently stable to allow with safety a flood of 16,000 cubic feet of water per second to pass through the wastes and over its crest. The water passing over the dam will fall on bare granite bedrock, and... 