New-York daily tribune. [volume] (New-York [N.Y.]) 1842-1866, 1859-04-27

hds II feet Of wasr IN Il. The other - me-, yet quite
completed ard win net be ready TO rscrve water for
ten days yet.
Their are two fore minis laid OF 36-inch diameter,
each TO deliver the from the pumping to
the reservoir There will b. two check-yayes on each
line. Tie length Of each force main Is 3 100 feet.
Thee pipes are very heavythe iron of the pipe being
inch thick at the lower end Of the hne, and inch
thick at the upper end.
The Engine-House j. not entirely finished, but
promises to b. completed inside and ont about the
middle If June. Il j. 10 feet by ~ feet wide, with
convenient boiler accommodation and cosl-,hrds IN
tie wings The pump-wel which is within the build
ing Is large enough to accommodate four of the very
large class of engines contemplated in the contract
There ! but one engine erected. The second will be
built this season. This engine has been pumping at
intervals during the past month, and had filled the
eastern division of the Ridgewood reservoir with
fifteen feet Of water, when it stopped To adjust
the valves. The cy linder of the engine 4. - uchs
in diameter and 10 feet stroke. There are two pumps
Of 80 inches in diameter each, and the stroke
The engine was constructed by Woodruff & Beach
Of Hartford, Conn.
The conduit terminates at the pump-wel deliver
ing there the waters received from the canal and
ponds Il il Il miles in length as completed at this
date. with fall of six inches 10 the mile. Its width
inside is 10 feet, and hight s feet inches, with )
feet of water. IL will deliver 4OOOOOOO of gal
Ions in II hours.
At the eastern extremity Of this conduit the open
canal commences, This canal extends thence to
Hampstead reservoir, length of : 90 miles.
The Water Commissioners, by recent act of the
Legislature are authorized 10 change this open canal
into a covered conduit, change which the short eN-
perence this Spring of the effect Of this open canal
on the character of the water, already renders very
desirable II is presumed that this change will be
effected during the season. In the meantime the
water Of Jamaica Pond which is delivered into the
present conduit at It's eastern terminus will amply
meet the wants of the city.
Upon the existing conduit, there are mau-holc'
buh every 600 feet and two wase-wers TO pass on
the surplus water, and arranged also to draw Oft the
whole water, when necessary.
Iron the canal there are three of these wsste-welr
The collecting reservoirs rpon the streams, already
referred to- are: Jamaica Reservoir, Simonson's lor
Brooklyn) Reservoir, Clear-strcam Reservoir, Cor
nells Tor Valley Reservoir Rockville Reservoir, and
Hampstead Reservoir; "a branch conduit connects
each Of these with the canal The branches are
,luiced at the upper ends where the waters Of each
reservoir are controlled. In each of these reservoirs
tie vegetable deposits, the accumulation of long
period Of years, has been entirely removed. The
present bottom consists of sand gravel 1t was in
Jamaica Reservoir that the remains Of the mastodon
were found. on the 9th of March, 1853.
The amount of water derived from these sources,
as shown by gauges made during the dry seasons, Is
en-,