Evening star. [volume] (Washington, D.C.) 1854-1972, 1893-10-05

up the seamy and disorganized rock
through which the tunnel passed to prevent
II from falling into the conduit and to
furnish an interior surface that would rem
der the flow Of water easier and more
abundant To provide for the possibility
and broken it was necessary to fiil behind
| 1t to the natural rock, SO that the pres
sure on the interior Of the lining could
be transmitted to the surrounding mass
through which the tunnel was bored. Where
the rock was firm and solid and showed
| no signs Of disintegrating It was not neces-
sary to line 1t other than to produce a
smooth surface for the water to now over.
The determination of the magnitude Of
the dangers mentioned IN the first two OBJ
jections would be arrived at II the quanti-
| ty Of water that will escape from the tun-
| Eel under the head Of water in the dist-ib-
uting reservoir could be determined. From
measurements taken from March q to May
| T. 1889, the tunnel filled to the level Of the
top OF the Rock creek shaft In thirty-seven
days. showing a flow into the tunnel OF
about 10000 gallons per day, and from q
gauging of the overflow Of this shaft made
May q. 1890. it. was determined that the
water was running out of the tunnel at the
rate Of LIS, 900 gallons per twenty-four hours
1t is fair to assume that with q head of
water in the distributing reservoir the out
| ward escape will be greater than this
quantity Of seepage into the tunnel. as
| above developed.
However this may be, the quantities Of
water under consideration may be greater
o. less than we anticipate and lite points
of exit through the everything mass may
also be different from our expectations
But 1t Is confidently believed that the
quantity of water escaping from the tunnel
year to year as the veins. assures and pores
become clogged with the various matters
carried in silt-bearing waters. There
would seem to be no way, therefore. to
determine the extent Of the dangers men,
toned in the first and second objections
other than to fill the tunnel as II exists to-
day by connecting 1t with the distributing
reservoir and observe the results. II the
leakage from the tunnel in its present con-
dition. and the outflow upon the surface
of the ground should turn out to be less in
volume than is anticipated, then this out
flow would surely be less when the lining
was completed and put In good condition.
In answer to the first part Of the reso-
luton, 1t Is respectfully submitted that
process Of construction between the two
reservoirs. but 1t should not be undertaken
until, by actually filling the tunnel, the
first two dangers suggested by the Joint
select committee Of October g. 1885, have
been Investigated and their magnitude de-
termined.
The Cost.
This test can be made at a cost Of 81, 900
and lasting through a period of say from
nine months to a year. Should the results
| of this trial make 1t appear that 1t would
be safe to complete the tunnel and all the
| from the distributing reservoir to the new
reservoir and distribute the same to the
city. then the estimated cost of doing this
work is as follows:
For the completion of the tunnel. .. 500, 900
For the completion of the new reser-
Volr .......................... l4O,OV
$4,000
There is now available for the above pur-
pose $685., 027. 40.
With reference to the second part Of the
resolution. namely, 1.-The practicability Of
| placing iron pipes in the tunnel sufficient
| to carry the necessary water supply to the
new reservoir. and the cost thereof" 1t is
certainly practicable capable of being done
or accomplished. but 1t is submitted that
| 1t is not advisable. AS an original PROPOSE
ton for laying iron pipes between these
two reservoirs, no one would ever for
moment think of burying them 80 far be-
meath the surface Of the earth. where they
| will be covered with water. subject to great
| pressure and could only be emptied and in
spected with great trouble.
The amount of water that would be used
new reservoir, after II is filled would be
about 100000 gallons per day, and IL IL
| should be found impracticable to use the
tunnel as a conduit. and 1t is still thought
| to be essential to fll the new reservoir and
| to distribute to the city from this source
| then II is recommended that two forty
| eight-inch mains be laid over the route sug-
| gested by the board of experts. and between
| the two reservoirs.
The estimated cost Of these mains and the
completion of the system is as follows:
| For two 4s-inch mains, each 1900
rect IN length. ACKNOWLEDGEMENTS. xp49,3OO
For completion of the new reser-
| Noir ....-....................... l4o,OOO
Iotai -.:...:.......-.............. ,oeS:sOO
The board of experts estimated that NE
| tunnel could be completed and a six foot
steel pipe placed in 1t for the sum of 1852. :
| 7SG"
The Shortest Course.
An opinion Of considerable interest to
liquor dealers was submitted TO the Com
missioners today by Attorney Thomas.
1t deals with measurements In determin-
ing the shortest course Of travel between
saloons and churches or schools and may
be summed up briefly by stating that he
holds substantially the shortest course of
travel to mean the most direct travelled
route. He says. however. 1t is difficult to
as the situations vary and each case must
be largely determined on its own facts and
circumstances. The case on which the
opinion is based is that Of Patrick J. Col
Inns. for retail liquor license at 1900 5th
street northwest There Is a clause in the
liquor regulation providing that no LIQUOR
license shall be granted to any place with
In 400 feet Of church school house
Measured by the ordinary course of tray-
el that is, along the sidewalk, applicants
place was more than 400 feet from the
church, but measured in a straight line he
came within the magic circle. Attorney