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Average haul on portion of river under improvement, 7 miles; total average haul, 7 miles.

TT 4.

IMPROVEMENT OF SIUSLAW RIVER AT THE MOUTH.

For information concerning future work on and the status of this improvement, attention is invited to the summary of this report.

OPERATIONS DURING THE FISCAL YEAR 1911.

No work has been carried on during the year by the General Government, as no funds were available until the passage of the act of June 25, 1910. The port of Siuslaw, a municipal corporation, was authorized by the Secretary of War, under date of July 23, 1908, to assist in the construction of the jetties, and operations began early in February, 1911, under a fund of $100,000, which was realized by the port district through sale of bonds. A contract was made with Robert Wakefield under date of December 24, 1909, for extending the south jetty in accordance with the latest approved project, and under specifications approved by the district officer. Part of the old Government plant belonging to Coquille River was loaned for use on this work. The improvement work under this contract, which was commenced in February, 1910, was carried on from July 1, 1910, to December 18, 1910, inclusive, and from February 6, 1911, to June 18, 1911, inclusive, on which latter date the contract was completed.

The jetty tramway was extended seaward a distance of 1,935 feet during the year. The sea end is 2,940 feet distant from the receiving wharf. The enrockment has been completed throughout the entire length to a height of about 10 feet above low water. A brush foundation mattress was used from bent 65 to bent 125, a distance of 900 feet, where its use was discontinued and the smaller size stone used instead for the foundation course.

The following materials have been placed in the work by the contractor during the fiscal year:

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Amount that can be profitably expended in fiscal year ending June 30, 1913, for works of improvement and for maintenance.

1 $120, 500

APPROPRIATIONS.

Appropriated prior to adoption of present project (see H. Doc. No. 421,

57th Cong., 2d sess.)...

June 30, 1908, carried to surplus fund.

Received from sales....

June 25, 1910...

Mar. 4, 1911, sundry civil act....

Total.

$187,000.00 24, 838.00

162, 162. 00

150. 10

50,000.00

50,000.00

262, 312. 10

TT 5.

IMPROVEMENT OF TILLAMOOK BAY AND BAR, OREG.

Information concerning the status of this work will be found in the summary of this report.

OPERATIONS DURING THE FISCAL YEAR 1911.

At the close of last fiscal year there were no Government funds available for carrying on active operations. The port of Tillamook, however, under authority granted it the latter part of May, 1910, continued the operation of the dredge without expense to the United States, and in July 13,008 cubic yards were excavated from the projected channel in the vicinity of the Bay City Cut. On August 1 the appropriation of $5,000 by act of June 25, 1910, became available, and active operations were in progress by hired labor, with the Government plant, from August 1 to November 30, 1910, restoring the channels in

1 Exclusive of the balance unexpended July 1, 1911.

the bay to the projected depth, by redredging between Bay City Cut and a point below Memaloose Point.

During these four months about 40,510 cubic yards of material, composed of sand and silt, were excavated and removed to about 150 feet from the channel by sluiceways.

The available funds again becoming nearly exhausted by the end of November, the port of Tillamook was granted authority to continue dredging operations. Under this arrangement the Government plant was operated continuously until April 1, 1911, redredging and restoring the channel between Dicks Point and Memaloose Point, and in Hoquarten Slough to near the town of Tillamook. In these four months 36,903 cubic yards of sand and silt were removed and either sluiced to the side of the channel or placed on the adjacent banks of Hoquarten Slough. In addition, 175 snags were removed from the channel.

The $5,000 appropriated by act of February 27, 1911, becoming available, the plant was operated by hired labor from April 1 to May 15, redredging the channel in Hoquarten Slough to the town of Tillamook. During this period about 14,000 cubic yards of mud were excavated and placed on the banks, and 45 snags were removed. The total amount expended from Federal funds for dredging operations was $4,651.45.

The condition of the dredge, which is over 10 years old, was such that it was found necessary to suspend work and repair it by the renewal of decayed timbers and planks, recalking, including the bottom, etc., and on May 15 the work of dredging was suspended and the repair work commenced by hired labor.

Dredging operations were carried on continuously during about 11 months of the year, and resulted in maintaining the projected depth of 9 feet at ordinary high water in the channel between Bay City and Tillamook. The freshets during the spring months carried a great deal of deposit into the channel below Dicks Point, and it is not thought that the funds on hand will be sufficient to maintain the project throughout the coming year.

The river and harbor act of June 25, 1910, provided for preliminary examination of Tillamook Bay and Bar, Oreg., by a board of engineer officers, with a view to securing a channel depth of 15 to 20 feet, respectively, with a report on any proposition for cooperation by the localities affected thereby. As a result of the examination, a plan and estimate of cost of improvement of the locality was authorized and was submitted on December 30, 1910.

It will require more than $5,000 annually for the maintenance of the existing project with the present Government plant.

Estimate of additional funds required.

Amount that can be profitably expended in fiscal year ending June 30, 1913, for maintenance of improvement..

1 $5,000

1 Exclusive of the balance unexpended July 1, 1911.

APPROPRIATIONS.

Appropriated to Dec. 31, 1902 (see H. Doc. No. 421, 57th Cong., 2d sess.).. $105, 700

Mar. 3, 1905.

Mar. 2, 1907.

Mar. 3, 1909 (allotted Mar. 27, 1909, Apr. 20, 1909, May 4, 1910)..

June 25, 1910..

Feb. 27, 1911.

Receipts from sales..

Total.......

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Average haul on portion of river under improvement, 12 miles; total average haul, rivers and ocean, for all articles except lumber, 180 miles; total average haul, rivers and ocean, for lumber, 620 miles.

TT 6.

IMPROVEMENT OF THE SNAKE RIVER, OREG., WASH., AND IDAHO. Information concerning the details of this project, with the status of this improvement, is given in the summary of this report.

OPERATIONS DURING THE FISCAL YEAR 1911.

This work is carried on by hired labor and use of Government plant, dredge Wallowa and steamer Umatilla, and drill scow No. 2, constructed with State funds.

The work was concentrated principally on the river below Riparia. Inspection of the river between Riparia and Lewiston showed that

1 of this amount $200.14 was returned to the Treasury.

the channels had maintained their depths. Above Lewiston work was done at Slaughterhouse Bar, just below Asotin, and at Captain John, Fishers, and Couse Creek Rapids.

The steamer Umatilla worked one-half month in July, 1910, at Five Mile Rapids, building a wing dam to shut off the south side channel, and was then taken from this work to the Columbia River and was not returned to the Snake until the middle of March, 1911, when, in conjunction with drill scow No. 2 and dredge Wallowa, the dam at Long Crossing bar was finished. This dam was commenced in 1909, but was not completed, and was beaten down by the ice floes during the past two winters. The dam is 600 feet long, 7 feet above low water, and was constructed to narrow the channel, which is very wide at this place, and to concentrate the flow of water, to maintain a deeper channel across the bar, which is now the shoalest on the river below Lewiston, Idaho.

The dredge Wallowa began work July 1, 1910, at Palouse Rapids, 8 miles below Riparia. The channel was widened from 65 feet to 85 and 90 feet at the lower end of the rapids, and at the upper end a sharp bend in the channel was straightened out. Owing to a rise in the river in November the dredge was taken above Lewiston where work was done at Fishers, Couse Creek Bar, and Captain John Rapids, raking the gravel bars and blasting large bowlders to lessen the current over the bars where it is necessary for upstream boats to use a line.

The dike at Slaughterhouse Bar, just above Lewiston, was repaired and extended. This work was finished in January, 1911, and the dredge moved to the Columbia River, returning the middle of March for work on the dam at Long Crossing Bar, which was continued until April 30, when all field work was suspended and plant laid up until after the high-water season.

Drill scow No. 2 began work July 1, 1910, at the head of Pine Tree Rapids and continued work there until December, widening and straightening the channel to remove cross currents. The channel is much improved, but considerable work remains to make it safe for low-water navigation. The scow was removed to the Columbia River February 1, 1911, and returned to the Snake about the middle of March to assist in building dam at Long Crossing Bar. Following is a summary of work done during the past season:

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The volume of water being sufficient, it is believed that a good lowwater channel can be secured between Riparia and the mouth by continuing to blast out obstructions. The funds appropriated by

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