Inquiry into the Alice Springs Recreation Lake : submission by Department of Transport and Works
E-Publications; E-Books; PublicationNT; Report ; 1/1983
Made available via the Publications (Legal Deposit) Act 2004 (NT).
Date:1983-12; Contains: Floodplains Management Alice Springs Impacts of Todd River Flooding. Also filed in Alice miscellansous collection A0342, A0343.
Dept. of Transport and Works
Report ; 1/1983
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Technical Report WRD83001 Viewed at 14:07:22 on 29/07/2010 Page 24 of 64. 5 PYBERINGE This second site on Jay Creek is set iD- majestic raD-ere country and for this reason d!:"ew considerable attention in early studies. Hm"ever, it was rej ected as an option for the reasons given below. (a) Hydrology While the site offers a large poteD-tial storage, the catchment area is only 166 square kilometres and annual runoff is therefore expected to be less than most other sites under consideration. Hence, to create a realistic size recreation lake and minimise variation in size from year to year, it would be desirable to build a lower dam than the site conveniently allows. Unless the maximum size of the lake were only 60 hectares or so, the variati~n in size would be inferior to other sites. Hore berlefit is offeree. by the site in respect of a possible future water supply storage, harnessing most ~f the available runor:;: (French, 1973, found that the dam would rarely fill) but varying considerably in size according to the seaSOD-s. French found that although the hectares, the size which would 'time would only be 4.8 hectares. maximu:'P. size .... lould be exceeded. for 90% be of 360 the Recreat~on Potential ;;;':;;lO,c(~es s to the I"a ters edge woulC!. be very limited because 0 f rugged surrounding topography. 'size of the lake offered, whether a hioh or low '0"'''- bui It, woulC!. usually be smaller t-han the tion site. Site geology level dam Telegraph ~~t~~~~~;t.~~:n,~~~ geological appraisal revealed ~ leakage problems ,,/hich woulC!. the likelihood of require thorough .~,"v~stigation and grouting. Dru~ and spillway options ~indicated, it would be desirable to const=uct a dam at a 1 lower than the site conveniently allows. There being :suitable spillway saC!.dle for such-a level, it would be ary to adopt a concrete dam encorporating a spillway. to examine the possibility of fou~d that the amount of deepening the spillway excavation l'lOuld be
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