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August 27t 1979 <br />: city COMA l <br />F <br />F?M: Jim Andre <br />SUB=,- Ice Arena Irrprovemnts <br />The City staff has iret with Janus As soei ates (consultants on Ice ArenaL <br />jVPrOWjWmts) arld reviewed the thawing probjerrs at the ice arena. <br />r1he consultant (see attached letter) has advised that the soils are not <br />awe according to the prof bons made b the soils en neer s It is <br />th � • � • <br />new estimated that are additional 60 days of thawing. may be required at <br />an estimated cost of $300 per day <br />The alternative is to stop thawing and proceed to install the `� refr ige . <br />ation system, The di s � to this approach is that s3L f icant and <br />severe settling could our over a number of years into the future. This <br />would then put the City in the sarne situation as it is row; i.e. , the <br />extrere fluctuations in the ice sheet and the danger of dauaging the <br />refrigeration system and its resulting shut -down efts (basically p <br />cancellations) e <br />In ny op inion., to stop thawing ncw would cause the e.NPETditures to <br />date to be of no benefito <br />appear that thawing should occur to a dept. of at least 16 - 1,6 <br />It would � � <br />feet, soil borings indicate that thawing to this depth would eliminate <br />• • � �� serous settles <br />roost of the critical. ice Lenses and, therefore, g <br />rob lerns . however, the Consultant is reccwTending a thaw to a depth of <br />at least 20 feet. <br />.s no guarantee that an additional sib days will thaw the so�.l s <br />'1�ie guar <br />down to a . depth of even 15 - 16 feet. Ho ever, I do not see any good alternative other than. to proceed to the i <br />point where it s detern fined that <br />future settling prob l ham been ` zed:_ <br />is there f o recc a ded �t a change order are the i drove` <br />It � � expenditure of not � exceed <br />�t be approved which would authorize an <br />0 per for sib days for thawing soils at the ice arena; and that <br />p � <br />such funds be appropriated from the Public Works Reserve fwd. <br />If the Council conrs in this approach, scheduled programs such as <br />non - conference high school hockey gaues , figure skating, etc, would <br />be cancelled until January 1, 19800 <br />Att. <br />