Evening star. [volume] (Washington, D.C.) 1854-1972, 1874-10-07

SPIKED three rails, each three by four inches in
lengths OF eighteen feet. On the rails s-e nailed
pickets, one by four inches, six feet long: the
bottom beard Is one by fifteen inches m lengths
Of eighteen feet. Tue total length OF fence
bulit Is 90 feet, making, in addition 20 that
previously built, ,S5s feet, which completes the
fencing of this reservoir. The dwelling consists
of q superstructure of bricks, on stone founda
lions, Surmounte0 by a slated m 2nsard roof, aud
contains six rooms, three in each story. The
grounds around the dwelling were graded
and drained, and enclosed with a woOden
picket fence, i've feet in height. The
old buildings were taken down and the
lumber used IN the cOnstTuct of a stable and
storehouse for tools. All the fences aud out
buildings we're thoroughly lime washed. The
embankments at the auxiliary gste-hOuse aud
the stair well house were graded TO a uniform
slope and sOdded. The light shaft of the pipe
vault in front of the eftiuent gate house was
finished with cast iron VentiatOr. A stone
culvert, 100 feet in length, with a waterway
three feet square, was built across the road in
font of "Droyers' Rest and a ditch was ex-
cayated along the northerly boundary of the
reservoir lands, 20 intercept the surface drain
age of the droveyard, and connected with the
culvert, thus preventing the possibility OF the
surface water from the cattle yard reaching the
distributing reservoir. Stone cuFerts were also
built for the several water courses, crossing the
pipeline between the reservoir and Foundry
branch. Before building the culverts, bids were
received from responsible contractors, and the
work was awarded TO the lowest bid ier, j. WV
Nsndenburg, of Washington.
MACADAMtZIEG AND GRADING.
The contract for mscsdamizing and grading
J..
Washington, who commenced his work 10 sep.
TENDER and completed 1t last July The total
length OF road macsdsmZed Is 5000 feet,
Amounting TO 5000 square yards. The macad-
am laid by mr. Morgan commences at the west
end Of tunnel +, ana continues 10 culyert No.
2. The material used is principally gneiss rock,
broker with steam crusber, so as 70 pass in
any direction through a 2k-inch ring. The
width of macadam is II feet, the depth one
foot, placed on the roadway IN layers OF four
lncnesi ana each layer thoroughly rolled with a
heavy stone cylinder. The roadway was pre-
Tlously prepared by widening the excavations
and entertainments. The embsnkments were
also wldened over culverts Nos p and %, aud
at each end OF Cabin John bridge. A roadway
was graded and prepared for mscadam along
the nOrtherly front OF the Distributing reservoir
and over the pipe line for a distance Of 5000
feet The total quantities OF work done by Mr.
Morgan sre as follows: Macadam, s 600 SQUARE
yards; excavation, y $50 cubic yards; paved
bitches, Isl square yards.
STONE BRIDGES.
The contract for completing the coping and
parspets OF stone bridges was awarded 10 rhOs.
Harvey, esq, or Washington. lie commenced
work IN September, ana completed the coping
aud parauets Of bridge No. 3 in Decsnb Der.
The plan adopted is similar % that for Cabin
John bridge. The stone was quarTied from the
government quarries az Seneca. The length OF
The paTapetE is 200 feet each, and they contain
945 cubic feet OF cut stone. For bridges nos.
ana the coping was made of concrete. There
being 20 roadway over these bridges parapets
sic lot required. The concrete was Composed
Of hTCken stone, sand, and hydraulic cement,
mixed in the folOgiug proportions: 1 barrel OF
TOund.tOp cement, 10 cubic feet Of river sand
Is cubic feet OF broken stone. The stone wa
broken small, 20 g. TO pass ia any direction
through two-inCh ring. The cement and sand
were mixed dry, IN a large box; suffi cient water
Was ADDED TO make mortar, after which the
bfOsen stone was thrown in, ana the whole mass
turned over twice with shOvels and hoes ana
used immediately. II was deposited IN LAYERS
Of four inches in depth, and each layer was
rammed with a wooden rammer until the NOR
tar flushed TO the surface. The third and last
layer WAS worked Derfec ly smooth on top, and
the surface was divided into rectan giles tour feet
vide oy nine feet long, with wooden mOulds,
which being removed after the concrete had
set, formed suitable grooves for the surface
drainage. Previous to laying the concrete a
belt course OF cut stone, one foot wide, one foot
thick, and in lengths of nine feet, was laid en-
tirely around the deck Of each bridge.
POTOMAC DAM.
The cut-stOne dam over the MARYLAND chan
nel OF the Potomac river was recently eK-
smined and found to be In good condition
In July advantage was taken of the low
sIsge of water in the river 10 replace = nor
ton CT the rIprap protection above the dam
and which had been carried over the dam
by the spring freshets. To a certain extent
similar work has TO be done once a year, and
comprises the only repairs N ade on this structure
since its completion in lst7. The feeder under
the chesapeake and Ohio canal was cleaned cut
from end 20 end.
PIPE LINE.
The pipe line Is in good condition, and during
the year leaks q any importance have oc-
Cured. All of the stOp.cocks have been kept
clesn and ia working order, and the vaults have
btSn ilIn6~WaSEeQ. Stone paNEInenrs we're laid
around the vaults on the canal road.
IRON BRIDGES.
Bridge No. 3, over College Pond. is in good
order. The floor OF bridge No. 6, over ROCK
creek, has been kent in reosir. The foiiovrf,'H
in reference TO this structure is extracted from
my last annual report -" There seems 20 be no
common travel "Tbe Constant isrri5y 10 ~
which il is subjected has caused many OF the
ornamental scrolls which encircle the Joints OF
the mains 10 become loose and drop. and have
gOuhr its Continued uap a Il
oughfsre will eventually destroy It's usefulness
for aqueduct purposes"
WATER PRESSURE ENGINE.
The Worthington water pressure engine that
supplies a part Of Georgetown heights with
Potomac water, has been kept in almost con-
slant operation. II has been stopped only for
short intervals to replace the rubb springs as
they wore out, and for other slight repairs.
The valves and pistons have become much worn
and will soon have to be renewed. The cylin-
ders are also worn and should be rebOred. The
Aqueduct lands at Rock Creek bridge have
been graded and sodded and enclosed with a
substantial fence. In the workshop at this
point q "band saw" and grind stones have been
set, also ten inch turbine to work them.
HIGH SERVICE RESERVOIR.
The grounds at this reservoir have been kent
in good order; the gallery under the reservoir
ana the wooden fences around the grounds have
CONSUMPTION OF wArRR.
The quantity of water supplied during the
year has averaged over IL 200, 900 gallons daily.
The surface OF water at the tributing reser-
voir has been kept at the elevation of la feet
above tide water. To maintain this elevation
the conduit from culvert No. l9 70 the distribu-
ting reservoir has been run under head. Since
the embankments over this portion of the aque-
duct have been widened and raised. there have
been no leaks in the conduit. Before the en-
bankments were increased, the conduit leaked
whenever the water in the distributing reser
voir was raised above 142. The water supple "A
has been very clear, except during a part ~
the month OF April, when II was riley for q few
DAYS, owing to the long-contiuued turbid ,.or
dition of the Potomac. During the ,n,oar
months the surface or the water In the ',Stn Gunner
falls considerably below the crest Of e. oS S
mac dam, and IL has been difficult N Ie.,, ~ 70,
surface In the reservoirs up 30 la. In IuIp sns
August of the present year, this .,.-.,y sno
not been constantly maintain ed, the surface ace
CONSUMPTION IL more than n Ing tnat tns oaily
the Maryland cnsnnel Of e e Potomac. ~" :"
WORK YET tt an nov.
At Great Falls the oo,n. Doss
built BUILT entirely across the river to the Virginia
sho,e, anu me eate louise should be finished with
e sls.eo rooi. sp -pported by a wrou ght iron
usme. ane ais should be finished with gal
Nsnizeo IRON fyornIce
o.. 1n Ne wing reservoir win always be used
lol VIC sto<age Of water, 70 be kept for use in
II Chec VI rccfdeuts bapueuiUQ the eond uff