For purchase of road-way across land owned by William
Brooke...

For rent and purchase of land at high-service reservoir in
Georgetown

For rent and purchase of land at bridge No. 6, in George-
town.....

For excavating and removing rocks, trees, and bushes from the Maryland channel of the Potomac above the Potomac dam.

For lining with bricks a part of tunnel No. 1..

For finishing with cut stone bridges Nos. 1, 2, 3, and 4...
For widening and raising embankments over conduits, and
macadamizing roads..

For completing the lining of Dalecarlia tunnel with bricks
For excavating the bottom of the distributing reservoir to
an additional depth of thirteen feet and lining the inte-
rior slopes with rubble masonry laid in cement....
For completing gate-house at the distributing reservoir...
For completing high service reservoir....

For protecting with ripraps the water face of the connect-
ing conduit embankments

For ventilators over conduit

For fencing conduit and reservoirs

For building office at bridge No. 6.

For engineering, superintendence, and repairs for the fiscal year ending June 30, 1870..

Total..

$550 00

3,300 00

2,640 00

5,500 00 1, 650 00 27,500 00

11, 000 00 12,000 00

411, 115 00 44, 538 00 8,800 00

11, 000 00 3, 080 00 21, 000 00 3,300 00

30, 000 00

599,305 00

All of the unfinished work described in the foregoing estimate, with the exception of the distributing reservoir, can be completed during the next fiscal year if Congress will make the necessary appropriation. The aggregate amount of which, including a sufficient sum for engineering, superintendence, and repairs, is $188, 190. If to this be added the amount that can be advantageously expended in continuing the construction of the distributing reservoir, $200,000, the total will be $388,190.

Summary of the appropriations made by Congress for the Washington

Aqueduct.

If to this be added the amount of the estimated cost of completing the Washington Aqueduct ..

The total will be

$599,305 00

3,906, 389 00

A comparatively small amount when compared with the sums already expended by the cities of Boston, New York, Philadelphia, and Baltimore, for similar purposes.

The cost of extending the Potomac dam entirely across the river, to the Virginia shore, is not included in the present estimate; because the completion of the distributing reservoir to its contemplated depth will give a large storage capacity, and obviate the necessity of further extending the dam for many years to come.

I am, general, very respectfully, your obedient servant,
THEODORE B. SAMO,

Brevet Brigadier General N. MICHLER,

Chief Engineer.

Major of Engineers U. S. Army, in charge of Public Buildings, &c.

Estimates of appropriations which will be required for public buildings, grounds and works, under the direction of the Chief Engineer of the War Department, for the fiscal year ending June 30, 1871-Continued.