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Oregon Digital
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of wheat, the down freight was very much less than it otherwise would have been.
A large amount of agricultural implements and lumber was shipped up, of which. I am not able to ascertain the value, and which are not included in the foregoing...
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MAP OF PINE TREE RAPIDS ON THE SNAKE RIVER W.T.
showing the positions of Rocks removed under the direction of
MAJOR G.L. GILLESPIE, CORPS OF ENGINEERS
1878
Rocky Reefs
Old Channel
High water line
Line of Channel
Giant Power...
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MAP OF FIVE MILE RAPIDS ON THE SNAKE RIVER W.T.
showing the positions of Rocks removed under the direction of
MAJOR G.L. GILLESPIE, CORPS OF ENGINEERS
1878
Shoal and Rocky
Shoal Gravel Bar
Old Channel
High water line
Line of...
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MAP OF FISH HOOK RAPIDS ON THE SNAKE RIVER W.T.
showing the positions of Rocks removed under the direction of
MAJOR G.L. GILLESPIE, CORPS OF ENGINEERS
1878
Shoal and Rocky
Old Channel
High water line
Line of Channel
Shore...
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K K 16.
CONSTRUCTION OF A CANAL AROUND THE CASCADES OF THE COLUMBIA
RIVER, OREGON.
The plans for this improvement contemplate the construction of a canal 7,200 feet long, 3,150 feet of which will be in excavation across a rocky plateau on...
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S3,000, and has been in successful and useful operation since April. Two small boats belonging to the contractors have gone over the falls since the work commenced, and one life has been lost. Other casualties would have happened, involving loss...
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and 33.7 at the lower. The water continued to rise until the 18th of June, when it reached the highest observed point of the year, the upper gauge reading 31.2 feet above low-water, and the lower-gauge 42.3 feet. The curve showing these changes...
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he found it impossible to keep the pits clear. This examination will be continued at low-water. It was expected when this work commenced that the contractors would use the bowlders exclusively in preparing stone for the masonry for the locks, but...
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CANAL AROUND THE CASCADES OF THE COLUMBIA RIVER, OREGON.
PROFILE
ALONG CENTRE LINE OF CANAL.
SHOWING EXCAVATION UP TO JUNE 30TH 1879.
Surface of ground
u.S. ENGINEER OFFICE, PORTLAND, OREGON.
To accompany annual report June 30,...
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8500,000 can be profitably expended during the next fiscal year in continuing the construction of the locks, guard-gate, and breakwater, and in excavating the canal prism.
The Cascades of the Columbia River are in the collection-district of the...
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went of the river below the canal, were submitted, but a detailed examination and study recommended.
A limited examination was made during the high-water of 1876, under the direction of Maj. J. M. Wilson, Corps of Engineers. It showed a main...
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Subsequent to the report of the Board of Engineers an increased width of locks to 70 feet was authorized, for reasons stated by Major Wilson in his letter recommending the increase.
The following are the dimensions and references of the canal as...
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Abstract of proposals for the construction of a portion of the canal around the Cascades of the Columbia River, Oregon; opened by Major John, M. Wilson,
Corps of Engineers, October 1, 1878.
Excavation.
Masonry.
Iron.
If required....
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REPORT OF LIEUTENANT CHARLES F. POWELL, CORPS OF ENGINEERS.
UNITED STATES ENGINEER OFFICE,
Cascade Locks, Oregon, June 30, 1879.
Sin: I have to submit a report of the operations upon the construction of the Cascades Canal for the present...
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The observations were made on June 16, 17, and 18, when the river was slowly rising, and when the mean surface-reading above the rapids was 116.9 feet, or 22.5 feet below the flood of 1876.
Unusually low water occurred last winter. The upper...
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KK 17.
IMPROVEMENT OF THE MOUTH OF COLUMBIA RIVER, OREGON.
A survey of the bar at the mouth of the Columbia River was made
by Lieut. A. II. Payson, Corps of Engineers, August–November, 1878, under direction of Maj. J. M. Wilson, Corps...
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of the bar at the mouth of said river, and the preparation of a plan and estimates for its permanent improvement."
The survey is completed as far as necessary to establish the conditions of the channels and bar as then existing, but as a...
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present time nearly 1 1/2 miles in length by from 1,000 to 1,200 feet in width. From the western end of this island the submerged bank, known as the Middle Sands, extends within the 3-foot curve, in a direction a little south of west for nearly 4...
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sion and eastward advance of the Middle Sands, while not materially interfering with its present efficiency, still draws our attention to the accumulating strength of the sand girdle at this point, and invites us to look elsewhere for a point of...
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6 miles westward of Point Adams, had been cut through midway between the point and its western extremity by a wide channel, with 17 to 18 feet of water, running south by west from Sand Island, or at right angles with the corresponding channel of...
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joined, and the whole formed a bare spit 2 miles long. From the west end of this-sand spit the great Middle Sands extended first southwest 2 miles, with an average width of five-eighths of a mile, and then south-southeast 21 miles, the south point...
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cost, even if such an improvement should be adjudged proper and advisable, I cannot now give by reason of the limited time I have had for studying the question.
The artificial means necessary and fitting to be constructed to maintain a permanent...
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The steamer, moving at the rate of from 3 to 4 knots an hour, and kept as nearly as possible on parallel ranges, was located by two simultaneous sextant angles, every 5 minutes, when moving straight ahead, and additionally whenever a change of...
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