PROJ00480

• Contract/PO #: C150015
• Contractor Name: Highland Ditch Company
• Contract Type: Loan
• Water District: 5
• County: Boulder
• Bill Number: HB 98-1189
• Loan Projects - Doc Type: Feasibility Study

I
\

1

-6-

1

become thoroughly sa.tura.ted. All materieJ. seems to be in place,

1

but seems to have settled.m9re or lese and rather unevenly.
Our oonclus1onEl 1n x:egard to .this structure are,
that the materieJ. in the easterly portion of the dam was not
Buf'fic1ently oanpacted, ~o1ds ~ving been J.e:ft between the, ;". . -..-,'._
" ..~> ,-;..;,~~,I:J~r'."~':3'~i,~;::,~_'
chunks of clay, whioh, upon becoming thoroughly saturated.frOm
the water in the reservoir t have melted together, thereby oausing
a settlement or shrinksge in the structure .over these voids. We
do not bel1.eve the dam to be in B. dangerous condi t1on, and think
that it will beoome water tight hence entirely safe, if oare is
,-

1

1

I

exercised in filling and drawing off the reservoir eJ.lowing time

for the ambe.nl<ment to becane eJ.ternately saturated and drained,

which will cause said embe.nl<ment to gradually b ec ome settled and

compacted.

I

1

We reo cmnend that the dam be allev/ed to' gradually drain

out this feJ.l and winter, and that"in the spring the water ahonld

be eJ.lowed to gradUeJ.ly rise on the embe.nl<ment Wlt:l:l excessive' . ,-"

seepsge shows upon the lower face, when the lake shonld again be

lev/ered eJ.lowing the dam to'drain and hence become more compacted..

By Buch prooedure over a. period of ,two or three years it is our

1

1

opinion that the dam will bec:ome

thoroughly compacted and safe.

11th

, .

1

MCH-NJ

1

I

1

1

I

I

1

,
j
,~
~
i