The Anaconda standard., 1898-01-10

side tracks These new mines are To-
Gated in Cascade county. about Is miles
from Great Falls. and VIII be in com
plete operation on a large scale early
in the spring, thus greatly increasing
the coal output of the state
Il have only mentioned some of the
principal works that have engaged me
during the past season. Many other
improvements of smaller nature nave
been made, but you Will scarcely be
able to take up these even in as brief
a manner as | have written. | wish 70
say, however. that my division Is only
a small part of the total mileage In the
state of the Great Northern railway
and on the other divisions there must
have been carried on works OF interest
about which | have not the knowledge
necessary TO inform YOU
Anaconda Water Works.
Chester b. Davis, the engineer in
charge referred me to the Anaconda
Standard Of Nov g. 1897, for informa-
tion. In the following description L
have quoted literally from that paper,
and have added some points of en-
gineering interest given me by Mr.
Davis:
The Anaconda Copper Mining COM
pany has acquired and located rights
10 all the water in Hearst gufch. AT
the extreme south end OF II Is cres-
cent-shaped lake, named Lake Hearst,
about three-quarters OF mile IN
length by one-quarter of mile in width,
which is fed by the melting of the SHOWS
which exist there during the entire year.
This lake lies up against Mount Hag-
gin, at an elevation of $500 feet above
sea level, or $500 feet above the street
in front of the Montana hotel.
THE plans contemplate raising the
banks of the lake about 20 feet, which
will increase its storage capacity TO the
amount of over 100000 900 gallons. Thls,
with the other waters in the gulch,
which will be tributary to its works,
VIII be equivalent to daily How OF
fully 100000 gallons in addition TO me
volume OF over 100000 gallons at pres
ent flowing into the reservoir from the
old source of supply.
"A pipe line. formed of steel pipe,
about six miles long, Is being Dulit 10
convey the above waters TO an entirely
new reservoir in the gulch in which the
present one is located. This reservoir,
which will be termed the distributing
reservoir. viii have its water surface.
when filled, 800 feet higher than the
street in front of the Montana notel, and
it will be 30 feet higher than the water
surface of the present reservoir.
"As soon as the new reservoir is com
pleted the old one will be cleaned out
| and will be kept filed for use in case
| of emergencies. The new reservoir VIII
| be formed by building an earth and
| masonry dam across a narrow place IN
| the gulch, and when full the water in 1t
| Will be 55 feet deep in its deepest place
| This wll insure it's being cold and clear
! at all times. The pond thus formed VIII
! be about 1,300 feet long and about 400
feet in width. Its capacity Will be over
| 7C000,000 gallons and should an aeci-
dent happen to the supply pipe lead
! ing from Lake Hearst the volume in it
| nf al 80
to meet the etys needs much longer
than the time needed fer making the re-
pains The shore lines of the dtstrtbut-
ing reservoir are very irregular, and
| lying, as it does, in the hills, it will be
q very beautiful sheet of water.
The dam Is n composite structure,
consisting of IA concrete heart-wall
founded on d continuous bed of hard
| pan at a depth about 16 feet below the
| natural surface Of the bottom of the
| gulch across which the dam Is being
erected This wall is six feet in width
at the bottom and tapers to a thick
ness of 20 inches at it's top, which is
one foot above the proposed flow line.
The ends of the wall are carried into the
| bank on each side of the gulch to a good
solid foundation The dam proper is
| composed Of a very excellent quality of
clay, which is found close by the west
end of the dam. The wet slope of the
embankment is one and one-half feet
| horizontal to one foot vertical, while the
outer slope is one and one-quarter feet
horizontal to one foot vertical. The TOP
of the embankment is l. feet wide, and
terminates at a height four feet above
the tlow line. The outlet is taken
through the solid natural earth at ano
under the east end of the dam, and nc
pipes pass through the artificial en-
bankm6nt. The outlet consists of three
pipes. one "a inches in diameter. at the
Nt..ig ftI
the city supply, or means of empty
ing the reservoir through Il 24-incf
blow Off outlet into the creek immedi
| ateIy below the reservoir embankment
Vertically above this are two l4-incl
pipes. one Is feet below the water sur
| face and the other IS feet below 1t
which serve as the regular outlets 70
conveying the city supply. These ter
mnate in a vertical pipe in a dry wei
in which are located the valves for con
trolling the flow, and this vertical pip
discharges into the 24-inch pipe aboV
mentioned which pipe is connected witt
the l4inch pipe leading directly To tn
city. The overflow Weir Will be locate
at the easteriY end of the dam and vii
aaVe q length of so feet. This viii b
: in the natural solid earth and will b
formed Of masonry and will discharg
into a small raVine which joins the mai
creek below The dam
= Mr.. Davis says: There are man
| things of interest in connection with tn
, method Of conveying the materials int
? place in the reservoir embankment, an
? a number of novel appliances connect
| ed with the work. among which | nigh
= mention the electrically controlle
: valves for regulating the tiow from tn
5 lake down to the reservoir. and whic
5 enable us to regulate the flow to any dc
I gree of nicely which we may desire b
e means of an apparatus located in III
. office of the company in the city. TIL
1 very great drop, appvoNimating 2,6C
e feet from the lake down To the reserved
7 in a distance of $4,000 feet may ais
t be mentioned as an interesting poin
: The pipe line is of steel and is self drain
$ ing every foot of the way. The wor
0 was commenced about the middle {
{ October. and is nearly completed. All {
i the pipe and special connections wei
n manufactured at Mckeesport, Pa. an
G have been delivered since the middle
October =