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 63 of 64. i I i I (h) (i) ( j ) (k) Fear of dfuu bursti fear that the dam may dry out and crack during drought. The proposed structure is of concrete faced rockfill. As such, 11 drying out H is not an issue, nor is catastrophic failure a conceivable possibility. Concern over impact on the Old Telegraph Station access road and other existing infrastructure. It is proposed that the access the lake will be independent Telegraph Station. road and facilities of those for the for Old Claims that the cost \<las under-estimated. This is probably valid criticism. Feasibility Report (1979) '.'las $2.1 current estimate based on detailed since 1979, is 59.5 million. The estimat.e in millio!'"", while design carried The reasons for this escalation are as follows: the the out (i) An inflation of approximately 60% during the period concerned. (ii) The access road routes selected in the design '.'lere considerably longer and in more difficult terrain than assumed in the Feasibility Report. (iii) The reco~~endations by I.L Pinkerton resulted in different arrangements of spillways compared with that proposed in the Feasibility Report. While it is now still proposed that Saddle 4 should be the primary spillway (Pinkerton's Alternative A), the cut will be Wlc.er than previously assumed! the c.am will be much . 'h (t 'd ~' , t' M' b b1 n~g er 0 avo1. over 1..0pplng l.n . .1.e _ aX1..ffiUm Pro a _e Flood) and there will be a weir at Saddle 1 instead of a secondary spillvlay. These factors result in substantial cost increases. Concern that health issues such as mosqul~o breeding, arbovirus potential, swiIT~ers itch and disease transmission have been inadequately considered in the Environmental Review, or that the risks are unacceptable. 11 : )I.NDYS This subject is outside ~ne competence of Department of Transport and Works. However, observations are relevant: the two
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