The Idaho Springs siftings-news., 1906-08-11
A RESERVOIR SITE
REPORT OF EXPERT FAvoRs THE LAKE
FORM OF CHICAGO CREEK.
SURVEYS TO Be MADE FOR A DAN
AMPLE FUNDS TO CARRY OUT PLANS
OF THE CITY COUNCIL.


OF THE CITY COUNCIL.
Regardless of the criticism heaped mp
on the members. the city council met in
an adj ourued session last Wednesday
evening, the entire board being present.
The contractors reported that they were
ready for the council to inspect the ress.
voirs before turning water into the basin
and the aldermen decided to visit the
reservoirs in body Thursday morning.
The matter of building an overflow
aume from the south side of the rese-
volrs was brought up. Mr. Nc Cabe
sta ed that his company would build .
fame OF Pinch plank, oxS inches inside
MEASURE, placed at depth of feet be-
lo~ the surface for the price of IS cents
per foot. The length is about 400 feet,
aud the gentleman was instructed to 20
ahead with the work.
The proposed ordinance establishing
grades was read and ordered published.
The city clerk pro tenn. was instructed
10 order two carloads of sewer pipe for
The Grass VALLEY sewer and for several
other short lines in the city.
The crusher used by the con-
tractors IN preparing rock for
he Concrete work, it was stated, could
be bought for S'oo and the water CON.
mittee was instructed to examine the
rock breaker with view to purchas-
ng 1t.
The report OF r. M. Iones, consulting
aud constructing engineer on hydraulic
and electrical power plants, who ex-
amined the reservoir and dam sites 1t
Ed,th AXE and Chicago creek on August
aud ! vas read, extracts Of which
follow
The Edith lake site has an eubankment
saised which produces a shallow reser-
9eir of about "a acres area At this
point an earth filled dam can be con-
7tructed below the present embankmeut
20 feet higher than tue present water
surface which would increase the depth
OF the water 10 feet This dam would be
I,o3z feet long; maximum heighth 26
feet; maximum width 10Y feet; water
slope to /; lower slope II to I, with
Is feet width Of cap. This would cover
approximately rs acres aud would store
about II8,ooo,ooo gallons Of water in
addition to that which it now contains.
The dam would require approximately
2S, 700 cubic yards of surface material
consisting OF soil and discomposed gran.
lite gravel. There is moi hing in sight to
Indicate that dam constructed over the
lines selected which would cause a leak.
age. The dam embank ment would cost
approximately $II 500. In the Chicago
creek reservoir I frd an excellent To-
cation for the construction of a dam of
the same chaTater AS the one just de-
scribed. 1t should be $40 feet long; 40
feet at its greatest heighth; I57 feet its
creates. width at base and would re-
quire approximately $4,000 cubic yards
ofdecoinposed granite gravel and soil
rnbankment. Your preliminary sur
vey was made on the basis of a 20 foot
contour which would require $50 feet
total length; 27 feet maximum heighth;
app oximately I4,ooo cubic yards of
embankm and which reservoir would
store about $1,000, 900 gallons, while
the az foot contour would store approxi-
mate!y $4,000, 900 gallons. The 30
foot contour dam would cost approxi-
nately So, 900 for the embank ment alone
while the AZ foot contour dam would
cost approximately 1860 for the EN-.
bank ment.
This reservoir site has drainage area
of about o.I5 square miles and should re.
ceive an average annual inflow of IL to
IS cubic feet per second during the year,
with probably a flow of from :, to s
second feet during tine coolest interval of
winter.
In consequence of the apparent clean
condition of this basin, which would be
covered by water and that the appear
auce of the surface over which the dam
is to be built, would lead me to think
that there will be less danger of q
faulty foundation than in case of Edith
lake dam, and the reliable flow of
water passing down Chicago creek at q
that point would lead me to prefer that
location for a water reserve for domes-
tic purposes.
Supreme Representative AIRS. johnson,
of the Rathbone Sisters, was here Thurs.
day evening to conduct the installation
of the newly elected officers of the local
temple. as follows: Most Excellent chief
Mrs. Ellen Terril; senior, Mrs. Seleua
Morgan; junior, Mrs. A. A. Selleck;
inner guard, Miss Eta Crui se; past chief,
Mrs. Dora Mcdonald. After the work q