The Roanoke times. [volume] (Roanoke, Va.) 1890-1895, 1891-11-18

-<'N'N VII ohOhS ilOtilouS Is GuTHSU
into it. 1t would be difficult matter
when this sewage drain on Holiday
street is built TO carry it down in q
separate outfall sewer on the south side
OF LICK run on account of tho nearness
of the railroad tracks.
TO make covered drain large
enough for all the water coming to il
would be very expensive ma tier unless
we divert the water of Upper Lick run
In the manner proposed by Mr.. Dunlap
II this north interceptor is excavated
and a dam made in Upper Lick run
to turn the water through it, SO much
would be diverted from Lower Lick run
that drain twelve feet wide with YER
tical side walls and brick arch cover
would be sufficient.
II have been over the ground
traversed by tho north interceptor and
soc nothing in the way of its entire
practicability, from an engineering
standpoint 1t would run into Lick
Run near Nicholas street, below which
point it would probably be unnecessary
TO cover Lick run. If the combined
sewage becomes offensive below this
point, the plan would be to build small
sewer from this point on, large enough
TO carry the sewage only, leaving the
great, flow of water during storms to dis
charge as at present.
Tinker creek will not be eventually
large enough to dilute the sewage
coming to it, so that this small sewer
Will become necessary.
I'm this paper 1 have not considered
the piping for sewage which will be car
ried along tho streets. because I under,
stand that this expense will be borne
directly by those benefited and not by
the city treasury.
81 have made the following estimates
OF cost OF the different parts of the sys-
tenn outlined: y
Lower ,ed OF Lick run. $40 600
Build Railroad avenue drain. =. ......,.. 2IWO
Duiid Campbell street DRAIN. 1900
s,GOOO
This would relieve the worst.drained
part of the city, and, after it was done,
observation would tell when the build.
ing and paving had made necessary the
building of Mr.. Hering's interceptor.
This will cost, as already estimated
by others, $94 900 in round numbers.
when it is considered advisable to
cover Lick run, 1 estimate the cost as
follows:
Build the south interceptor. lFor this
use practically Mr.. Dunlap's
Build 1s,foot arched drain from the s''"'0'O'
end OF the Campbell street drain to
Nicholas street. .................... 100000
Total. ..............-........ SI25, 900. GO
THE entire cost of the works con-
templated in the above is S265, 600, of
which one half might be called expendi-
ture not absolutely necessary. The
small part of the expense comes first,
which will best suit the treasury of the
city.
The upper part of the Trout run
N Hva Co.
ginning of the south interceptor and
also the drainage ought to be carried to
the west end of the proposed Campbell
street drain, but the expense attendent
upon these would be small.
1.-The northern interceptor is especi-
ally valuable because by its means the
water in upper Lick run is prevented
from flooding the lower Lick run, which
would back up the drains on Campbell
street and Railroad avenue. AS Lick
run would be used chiefly for an outfall
for these drains, they would run FREQ at
all times.
the object in milking the drains on
Railroad avenue and Campbell street
with vertical sides is that by this means
the area of the bottom of the drain is
large, and consequently the water will
not run as high in q flood as if the
drain were egg-shaped. Besides, as
these drains carry tho Storm water
only, the securing action resulting from
an egg-shaped sewer is Unnecessary.
In the Lick run drain this form OF verti.
cal side walls is chosen because it can
be most easily built. The water can, if
necessary, be forced to one side by q
dam, while tho wall on the other side IS
being built. All of these drains should
have the bottom dished, espe cially
lower Lick run, if used for combined
sewage.
IF 1t is decided to cover tho Lower
Lick run before the the Herring inter
ceptor is built, some money might be
saved by turning the intcrceptor into
Lick run from Tazewell street, instead
of into the Roanoke river. This could
not be done unless Lick run is covered,
because the combined sewage from the
interceptor would be offensive. In this
way the cost Of the interceptor would
be reduced about $4,000, while the In
creased cost of the work on Lick run,
owing to greater width of drain be-
coming necessary, would not exceed
$4,000, a net saving Of $4,000
IF it sh ,ud prove necessary to cover
Lick run without building the intercept
tor proposed by Mr.. Dunlap. the cost
for the same length as proposed above
at a cost of sou, OUO would be increased
to $4,000. besides the additional exca-
walton. An egg-shaped drain will not
do for Lick run, because, as stated
above, the water has to rise too high in
flood to find sufficient area of cross-sec-
ton to carry it
-"lf the finances Of the city admit of
1T, 1T would be best to build the south
interceptor at the same time as the
lowering OF Lick run and the building
OF the drains on Campbell street and
railroad avenue, but these latter should