Burlington weekly free press. [volume] (Burlington, Vt.) 1866-1928, 1867-05-03

o source, namely, from the elevated ground in th
south west part Of Williston?
This inquiry Of course involves the questi-ni
Of quantity, quality and cost
As to the amount Of water required for th,
necessities Of the city, it is assumed II the re,
ports referred TO- that daily supply Of 500, ,OOC
. gallons Is ample fr the presen; wants of tlis
city. This amount is probably not too great FOL
a population Of 5000, judging from lie ezper-
ience ofseyerAl Of cur American cities.
100000 gallons per day, is l09.500, 900 gal
Ions per year. If this amount cannot be had
as required, from running streams (ani it is
not supposed that il can be, from the portion Of
WiIliston referred o) there is still reason to be-
lieye that it may be cb,aiuel from the surface
drainage, By collecting the water from saita-
be extent Of surface, into one y more reserv-
oirs, where !; can be available at periods when
the rains flil to furnish what IS necessary.
The observations Of Professor Thompson f5r a
series Of eleven years, show that the annual
fall OF water from the clouds averaged in Bur
liugt1u for that period, about % inches. For
the seven years next preceding this series, the
average vas 81 inches. SO that 81 inches would
seem TO De a relilble estimate
This, upon one square mile Of surface, is
equal TO -4,S42,iOO cubic feet Of water annual-
ly, equal TO i,GlO, 900 gallons annually, which
e L. times the amount needel for q popul4-
tion Of 5000, at 80 gallons each daily. This
entire amount Is, Of course, not available, as
very much oft will be lost By evaporation,
s1aklse anj leakage
Supqosing this lcss to be three four,hs 20 four
ffths Of the whole amount, "a safe assumption
from experience III similar casesl and there still
remains enough from one square mile At the rate
assumed, to supply population Of 5000, and
from two square miles for double that number,
and 60 on
But Is the shape and elevation Of the ground
in Williston, such as to afford the water not
ony for the present wants Of the city, but for a
. Population much larger, say 1000 to 2i,05o
In other words, can the drainage Of, say three
square miles OF surface, be conveniently collect
Cd ST such an elevation above the point Of del.y-
cry N the city, On the ridge east Of the Co.lsge,
sly 80 feet above the Lake, as Will permit its
conveyance thither by a pipe. at cost within cur
means
The ground in Wilist5a which first presents
Itself for examination. and which may he The
Only practicable ground, is the valley Of Sucker
brook. east Of Ferris bill. AMI about SIX miles
distant.
This valley, above the junction cf i.s Two
principal branches, appears by the map. to in
clude an area Of about four square -ilc. II
such is The fact, AMI the junction Of these
branches is high enough, then the question Of
source Of supply Is settled. Ifnot high enough.
then two or more reservoirs may be practicable
higher up on the branches, Of sufficient capaci-
ty, together with the distributing reservoir in
the city, to furnish whatever water is required
when the rains fail.
II the Sucker brook valley IS found 10 he too
limited, it may be possible TO turn iato it the
drainage Of some ether valley adjacent which is
a little more elevated. The possibility Of thus
al ling to the supply should be ascertainel.
As to the cost, PIPE ten inches IL diameter, @
II miles in length, Of uniform inclination, viii
deliver, under a head Of sixty feet, by the most
approved practical formula, $4,000 gallons
daily The pipe, in passing ron Sucker brook
to the city, will Of course descend 70 the level Of
the intervening plain, which IS supposed to be
about two hundred fee, above the Lake This,
with the lateral curvature, which will not be
great, viii add to the resistance. ami lessen
somewhat The quantity delivered, fr which
suitable allowance must be made.
supposing ten inch pipe to be adequate the
cost may be estimated as follows
Receiving reservoirs and fixtures,
say sll 900 DO
/ 6 If miles, or $1,000 lineal feet
pipe, including ,renehing and
baekflling, at VI % 57,0eO 90
distributing reservoir, 1000 90
/ Land, 1000 90
Cost Of distribution by McAlPiue's
estimate. less $4,000 deducted
for cement pipes, G0,OOO 90
[ Engineering and contingencies, 5000 90
Total cost. Sll7,020 90
Superintenience. Office, clerk hire
stationery, &c, about 81 800
per year, which is the interest at
g Ter cent on 25,o0o 90
Total, sl72.O90 90
The lowest estimate Of first cost for a full sup
ply from the lake is Sl47, 800 90
The estimate in same report (NIr.
Liusley's) Of cost ofraising oOO,-
900 gallons per day, is S3,5l2
per year, which is the interes; at
6 per cent. on $500 20
To which add cost Of superinten-
denee, Office. &c, as above, 81,
500 per year. is the interest at o
per cent. on 20,VOO %
Total, s227,76O oo
The two plans therefore compare thus
Lake plan, with supply Of only
100000 gallons daily, at an eley-
alton averaging perhaps lSO ..
feet, eZ-l,'0o VV
Gravity plan, the water all deliver
ed at an elevation Of 80 feet aud
in quantity much greater, l72,OsO OO
Difference in favor Of grayitatiOn, S55,o7O "
This comparison. however, exhibits the Lake
plan in toO favorable light. Mr.. McAlpin'
says that the cost Of that plan, as stated above,
too low by $4,000, and he has had much ex-
perience in such matters Adding only on'
half this amount (s2O. .OO0) to the diferenc'
above, and the total difference in favor Of gravr
tstion is s75,67O 90.
But the estimate Of the Lake plan, is designeC
Only to meet the present wants Of the city, o.
at most, the wants Of a population Of 10000
To Increase the suruiv hv ruuninp in the sam