PROJ00462

• Contract/PO #: FS0036X
• Contractor Name: Idaho Springs, City of
• Contract Type: Loan
• Water District: 0
• County: Clear Creek
• Loan Projects - Doc Type: Feasibility Study

MATERIALS TESTING SERVICE

I

the ice glaciers, deposits were layed out and probably the

main axisc6f the'dam lies along a glaciated time zone.' In

other words, the main dam axis defines a point .at .which__the.

g lac ier. ..rema ined stat ionaryco af ter __ad v ancingc.down.,...the ..Jllountai-n .

slope~'_",-" -

The-lake basin-'is considered.. to, be . a_cirque -where,the.glacier.

rema.ined. prior-.to retreating further. up the mountain...where

the~- Chicago'~ Lake Sf; wer-e=forrned ';:-be fore'A:he --gilacier:..d.;j;sappeared.-c=:~-

- ~ j

The;-rock~- filour-"deposj.-ted ,-dlt .'the;:;llake-"basin,;oxidi:zed"'<'l.nd;;;j;ormed'i-.c:"';<;' ,- - . ~,

through-.~ime .i,'.<lohe-'oclays ""and,,-;;c-la y, ma teria-l-::' encoun.tered -c:.icn :.'i:he"'-"o~

dam I scentra-l'core .---The~-remaining material used in the dam

construction originated during the same time__and represents

the . material s..-mosL-commonly ,_-found. -._:in_a,,_ terminal;,morrairbdepos-it_~: n

LABORATORY TESTS,

Allsoil.samples,and cores of the dams fill.materialhave been

carefully. classified..andnidentifiedLin the' laboratory "_'Soil .

samples ',have,-been ~lassifed .in' accordance with" the -..Unified -

System of soils-Classification ,(Casa Grande)__..and- identified~_

in the,table.-of results__ _ In order..to ::aid-in- classification

of certain..materials-penetrated,~,as--well :.as -to" provide soil.

indices .for _,use'dn des-ign--evaluations ..concern.ing '::soilc- materials" - ,

present'.at ..the..siter- a.' ser:ies_ of _Atterberg- Limit~eterminat-ions-i-"

moisture_content~determinations-,..- and- unit - dry.'weight determina,-_'
tions- have; been:: conducted_ on. zhe :--retr.ieved..Lsoi-,l'--samples,,',-:~-A

ENGINEERS

-5-