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COMMERCIAL STATISTICS.

Season of navigation.—Year 1910: Opened, January 1, 1910; closed, December 31, 1910.

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Average haul on portion of river under improvement 20 miles; total average haul on rivers 65 miles.

(B) OPERATIONS DURING THE FISCAL YEAR 1911 FOR LEWIS RIVER,

WASH.

After the repairs to the plant were completed, the dredge Cowlitz was placed in commission on September 28 and commenced dredging at the mouth of the Lewis River. Dredging was carried on at Kuhnis and Davis bars, after which the plant was transferred to the Clatskanie River. On May 10 the dredging plant was again towed to the Lewis River, beginning dredging operations on the East Fork below La Center, and continuing downstream where work was done at the Cowley and Shuttie bars and at various shoals to the mouth of the East Fork. Work was completed on June 22, and the channel was left in good condition for light-draft navigation.

The snag boat Mathloma was employed during a few days in April and worked on the North Fork between the mouth and 1 mile below Woodland. A total of 67 snags were removed from the channel and 64 trees cut from the banks.

Considerable work has been done by private parties, also by the county authorities, in protecting the high banks at various localities along the main river and the North Fork as far as Woodland.

A stadia survey for comparison with previous surveys was made during November from the mouth of the river extending upstream for about 3,000 feet.

The following is a summary of the operations during the fiscal year:

Material removed from channel (sand and gravel)..

Total length of cut.....

Average width of cut..

Time actual dredging..

Time moving, general repairs, etc..
Fuel consumed:

Wood..

Coal..

Snags removed from channel.

Trees cut from bank.....

Average monthly cost of operations

Estimate of additional funds required.

..cubic yards.. 29, 925 .linear feet.. 4,790

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

CONSOLIDATED.

Estimate of additional funds required.

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

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APPROPRIATIONS.

Appropriated to June 13, 1902 (see H. Doc. No. 421, 57th Cong., 2d sess.)... $14,750

Mar. 3, 1905 (allotted Apr. 7, 1905).

Mar. 2, 1907 (allotted May 1, 1907).
June 25, 1910 (allotted Aug. 4, 1910).

Feb. 27, 1911 (allotted Apr. 8, 1911).

Total.....

5,600

2,500

2,500

2,500

27,850

COMMERCIAL STATISTICS.

Season of navigation.-Year 1910: Opened, January 1, 1910; closed, December 31, 1910.

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Average haul on portion of river under improvement, 20 miles; total average haul on rivers, 65 miles.

UU 8.

IMPROVEMENT OF GRAYS RIVER, WASH.

For history of this work, project, and results accomplished, reference is invited to current summary of this report.

OPERATIONS DURING THE FISCAL YEAR 1911.

No work was carried on during the fiscal year. Navigation on the river is regulated according to the stage of tides, and it was not until recently reported that the shoaling of the river just below the head of navigation and numerous snags in the channel were a menace to navigation. The removal of these obstructions is contemplated during the coming season.

Estimate of additional funds required.

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

1 $500

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COMMERCIAL STATISTICS.

Season of navigation.-Year 1910: Opened, January 1, 1910; closed, December 31,

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Average haul on portion of river under improvement, 8 miles; total average haul on rivers, 52 miles.

UU 9.

GAUGING WATERS OF COLUMBIA RIVER.

OPERATIONS DURING THE FISCAL YEAR 1911.

Gauges were established during March, 1911, as follows: One on the Willamette at Linnton; one at the mouth of the Willamette and nine on the Columbia River at the following points: Willow Bar, Warrior Rock, Martins Bluff, Kalama, Slaughters Bar, Stella, Waterford, Cathlamet, and Elliotts Point. Readings were commenced at the above stations on May 15, 1911.

The gauges are all staff gauges, and were set as nearly right as possible. A concrete bench mark was set at each station, and its elevation above the zero of the gauge determined. The zero of the gauge at each point is to correspond with low water in the river at that point. When sufficient readings have been taken these gauges will be corrected where necessary and connected by a line of levels to determine the slope of the river. Current measurements will be taken later and the discharge at different stages determined.

Estimate of additional funds required.

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

APPROPRIATIONS.

Total amount appropriated to June 13, 1902 (see H. Doc. No. 421, 57th Cong.,

1 $1,000

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