TABLE NO. 5.-Lynn Harbor (proper), Massachusetts. Current observations from fixed stations with surface float (tin cylinder, with log line) taken in

June, 1883.

TABLE NO. 6.-Lynn Harbor, Massachusetts. Tide observations taken simultaneously at three stations.

PROJECT OF MAJOR CHARLES W. RAYMOND, CORPS OF ENGINEERS

UNITED STATES ENGINEER OFFICE,

Boston, Mass., May 8, 1884.

GENERAL: I have the honor to acknowledge the receipt of Department letter of the 25th ultimo, together with copies of a letter of the Chief of Engineers to the Secretary of War, dated April 21, 1884, and a report of the Board of Engineers, dated April 10, 1884, having reference to the proposed improvement of Lynn Harbor, Massachusetts. In compliance with instructions contained in Department letter above mentioned, I have the honor to submit the following project for the application of the existing appropriation for that harbor prepared in accordance with the report of the Board and the letter of the Chief of Engineers above referred to. The Board remaks that "if the improvement of this harbor be begun and continued the main ship (Lynn) channel should first be improved, and till that is accomplished little money should be spent on the other." Since the project of the Board provides for the improvement of the main ship channel only, and indicates no expenditure whatever upon the Point of Pines Channel, it is inferred that the funds now available are to be expended upon the main ship-channel only, and the present project has been prepared in accordance with this view.

The project of the Board for the improvement of the main ship-channel is as follows:

1. A channel 200 feet in width and 10 feet deep at mean low water is to be dredged in a direction nearly north-northeast, from a point a little east of the White Rocks to the deep water opposite Little Nahant, a distance of about 3,600 feet. It is supposed that this channel can only be maintained by tidal currents guided into it, and for this purpose a training wall is projected, the details of which are given in the report. The Board, however, recommends that a part of this dredging be executed, and the rate of filling be watched closely, and that the construction of the training-wall be delayed until its necessity is absolutely certain.

The Board remarks that before beginning work further borings should be made near the White Rocks, in order to be sure that the dredging proposed is practicable.

2. A channel 200 feet in width and 10 feet deep at mean low water is to be dredged from a point opposite Sand Point along the Lynn Channel to the Lynn Harbor line, a distance of about 6,400 feet. It is supposed that this channel will fill slowly, and, since it cannot be kept open by the tidal scour, that it will have to be maintained by occasional dredg ing.

The two channels thus projected form together a single channel 200 feet wide and 10 feet deep at mean low water, extending from Broad Sound to the Lynn Harbor line.

The amount of the appropriation for Lynn Harbor remaining unexpended is $57,704.93. In conformity with the approved project, I respectfully recommend its application as follows:

1. To dredging channel 200 feet wide and 10 feet deep at mean low water, from near White Rocks to deep water opposite Little Nahant, 30,706 cubic yards, measured in place, at 50 cents...

Contingencies, surveys, &c. (124 per cent.).

$15,353 00

1,919 12

$17,272 12