The L'Anse sentinel., 1908-04-04
A Splendid
Report on Power.
OrsiSon Makes Returns c0hcerninS
Investigation Of FAN River
st the New Site Of
fower Plant.

e~"Ss >s~~
Saturday last R.. C. Williams. chair
man Of the light and power committee
for the village Of L'Anse was in receipt
Of the following communication from
Msssrs O'Keefe- Orbison Co., the latter
of whom made q recent visit Of investi-
CATION at the new site of the power
plant. The report is . very gratifying
enc and furnishes some very valuable
information. upon which the committee
may commence it, work.
The report is in part ~ follows:
"As directed by you, have made an
exasninaAionr off, the FAN river on the
land owned by your village with refer
ence TO its utilization for the operation
of the Electric Light plant, and beg to
make the following report:
"The area drained by Fall river
above the point in question is IS square
miles. We know by practical observa-
tions and measurements that the ordi-
nary low water flow Of rivers Of simi-
lar character is 0.46 Gu. #. per second
per square mile Of drainage area.
Then the ordinary low water flow on
your property is 0.46 x 45 equals 20.7
Gu. #. per second.
"Our levels show that up to the first
dam location, about 1000 it. above the
north line of your property, there is a
52 #. head and fall, by building dam
about IL #. high. This dam will flow
back over quite an extent of territory,
this affording q pond in which the water
not used during one portion of the day.
can be stored and used when the peak
load demands the greatest amount of
power.
''The theoretical horse power of
stream is the weight of water flowing
per minute, multiplied by the head, and
divided by $4,000. Or, cubic feet per
second, times head, divided by 8.s
equals 20.7 81 divided by a8, equals
1928 theoretical horse power. The
ordinary efficiency of water wheels is
30 per cent. Then 1928 0.s0 equals
97.8 horse power delivered to generator
shaft for "a hours per day.
''The load factor of the ordinary
lighting plant is about 20 per cent.
That is to say, to use the entire power,
and provide for the peak load, it will
require water wheel and generator ca
pacity. Of nearly 500 horse power, if the
entire product is used for lighting. In
asmuch as you do not require this
amount of power at present, we sug-
gest that your present development be
a 100 kilowatt generator, driven by a
pair of turbines of sufficient power to
operate the generator at rs per cent
above the normal load for short time.
This will be somewhat less than one
half your total capacity, unless your
load factor is changed considerably
from what it is at present. Later,
when the capacity of this plant is about
exhausted, you can add another unit Of
the same, or a little larger, size, as
may be deemed advisable, and the cost
will be little, If any, greater than if
put in at the same time as the first
unit.
At the dam location selected, there
will be required dam about 40 #. long
on the bottom and l75 feet long on top,
and about fifteen feet high in the high
est place. We advise that the central
portion of this be Of concrete, m which
will be the gate Of sufficient size to take
flood waters or drain the pond, as well
as for two pen-stocks leading down to
the water wheels and power house. The
balance Of the dam, Q portion on each
side, viii be earth embankments.
''The penstock for the first unit
hhov,d be 8 #. in diameter.
1--WE recommend that this be built Of
inch White Pine slaves, bound with
7-8 inch round steel hoops. 1000 It. Of
this win require about 5000 feet Of
lumber.
The power house machinery vii
consist Of pair Of horizontal turbines
Of ahosf tls6shseSe p0wer;Sgvvprpor x
regulates the speed Of the water wheels
100 Kw., 8-phase generator At 60l
r. p. m. and exciter Of about 8 kilo
watts, belted to generator shaft;