Territory Stories

Flood Warning and Damages in Alice Springs: Part 1 Executive Summary. Part 2 Tangible Damages Part 3 Intangible Damages & Emergency Procedures



Flood Warning and Damages in Alice Springs: Part 1 Executive Summary. Part 2 Tangible Damages Part 3 Intangible Damages & Emergency Procedures


Handmer, John; Smith, D. I.; Greenaway, Mark


E-Publications; E-Books; PublicationNT; Report ; 53/1989




Made available via the Publications (Legal Deposit) Act 2004 (NT).





Publisher name

Power and Water Authority

Place of publication

Alice Springs


Report ; 53/1989

File type


Copyright owner

Check within Publication or with content Publisher.

Parent handle


Citation address


Page content

Technical Report WRA89053 Viewed at 03:02:00 on 18/02/2010 Page 122 of 139. I I I I I I I I I I I I I I I I I I I I The pool of water would be used to kcep the clay core of the dam moist. Water would be pumped into the top of the upstream sand filter with a small solar powered pump and allowed to trickle down the tilter. The height of water permanently stored against the main dam would be 9.0m compared with 22.0m for the" full" dam option. Instrumentation would be incorporated into the dam to detect changes in moisture content in the core. Sediment Traps Sediment traps would be provided on the Todd River and Colyer Creek as outlined in the EIS. Sediment Carting The proposal outlined in the EIS to cart sand and gravel deposited in the sediment traps and place it in the low flow section of the spillway channel excavation remains. Because of the greater attenuation of small to medium sizes floods, the quantity of sand carted is estimated to be significantly less than for the "full" dam, ie. average of 8,500m3fyear rather than 12,OOOm'/year. Actual rates for placement of replenishment sand will depend on the monitoring of bed levels within the river. . Access Roads Gravel paved access roads would be provided betwcen the sediment traps and the Stuart Highway and between the Stuart Highway and the spillway channel excavation to allow for sand replenishment. Construction , Construction would be similar to that outlined in the EIS. The principal differences being: effective tlood mitigation for Alice Springs would be in place by the end of 1992, providing further consultations with Custodians proceed satisfactorily. The order of construction would be resolved following acceptance and may vary from that included in the EIS to suit variability in tlood risk throughout the year. vegetation and trees wi!! no longer be cleared out of the inundated area. a new source of filter sand will be required, as the source in the Todd river immediately upstream of the dam wall may not be available for use. At the time of writing an alternative source had not been finalised. 4

Aboriginal and Torres Strait Islander people are advised that this website may contain the names, voices and images of people who have died, as well as other culturally sensitive content. Please be aware that some collection items may use outdated phrases or words which reflect the attitude of the creator at the time, and are now considered offensive.

We use temporary cookies on this site to provide functionality.
By continuing to use this site without changing your settings, you consent to our use of cookies.