, 1923-11-29
Report on tbs Sage Creek Water
System to the Board OF Trustees
Of the City Of RawliRs, November
IN 1OD3.

system to the BOArO OF trustees
Of the City Of RawliRs, November
20, 1923:
In accordance with the desires of
the Board of Trustees of the City of
Rawlins l have made a detailed ex-
animation Of the new water system
from Sage Creek to Rawlins, pri-
marily for the purpose OF reporting
as to whether or not the classified
ton of materials as reported by the
Weiland Engineering company is
correct, In my estimation, and Just
to the City of Rawlins.
This question has arisen on ac-
count OF the fact that the original
estimate made by Mr.. Weiland after
a rough preliminary survey. showed
a length approximately 5000 lineal
feet of solid rock on the main line,
and that after the trench had actual
ly been dug in the located line ac-
tual measurements show there are
approximately 10000 feet of rock
excavation.
In classifying materials on con-
struction work 1t is customary to
make either two classifications:-
earth and solid rock. or three CLASH
fications:-earth. loose rock and
solid rock. In the first instance
Earth is classified as n material
which can be moved readily by earth
moving machinery, and Solid Rock
is material which necessitates the
use Of explosives for the removal of
same However, when materials are
encountered which are too hard to
be classified as earth and too soft
to be classified as solid rock. then II
Is necessary to affect Q compromise
between the contractor and the eng
ineer in order to be fair to both the
contractor and the employers OF the
engineer. This Is the plan adopted
by the Weiland Engineering COM
pany since the addition of loose rock
to the two stated classifications
would probably have resulted In ad-
ditional controversies between the
engineer and contractor as to wheth-
err Or not intermediate materials
should 10 classified by the engineer
Al earth OF by the contractor as
solid rock.
Erosion has played an important
part In %concealing the nature OF ma
teriais underlying the surface along
tho u VI tht SutiTC tyhttih.
A ridge usually indicates that It
exists due to the TACT that the mater
ials OF which II Is composed are hard
and therefore have resisted erosion.
while valleys show the opposite to
be true, However. in walking over
the system this did not always prove
to be true as far as materials which
were excavatcd from the trench were
concerned. On the contrary. I found
that the material on some OF the hill
tops was easily eScavated by trench
ing machines while portions OF val
'eys consisted OF cement gravel or
other hard substance which n
picked ou, by hand with consider
able difficulty or blasted. This Is
probably due to the fact that floods
have carried these hard materials
from higher levels into the valleys.
From Rawlins to the reservoir the
line has been dug through glacial
wash and nlluvium practically the
eutire distance. and short stretches
of cemcn gravel or other hard sub
stances were found at various places.
From the reservoir 10 "Ffve-Mile
Hole" the material consisted OF al
iuvium and lodges OF solid rock.
These lodges Indicated that consider-
able solid rock could he expected.
which WAS proven by the trenchIug
machine. From Five Mile Hole to
lAmb~r'son's Ranch. which 10 about
10 miles by pipe line from Rawiins.
the trenchinE machine cut through
aiiuvtum practically the entire dis
tance. with tho exception Of short
stretches Of solid rock or hard pan.
The remainder OF the distance to
Sage Creek 10 . series Of lengths OF
earth. cement gravel or hard pan.
and solid rock.
Mr.. u. O. McMechen. local repre-.
sentative Of the w'eiiand Engineer.
sAs company. provided mo with . de-
tailed list Of earth. hard pan or CO.
meat gravel. aa6 solid rock. with
their locations along the line. Tor
NY e~onvculenos In checking same
Sufficient survey stakes m atiii IN.
tact. enabling me TO determine the
exact location Of each classification
without excessive delay.
After walking over the lines -
0aRo Creek Hasta and tho main line