Letters to the editor: August 5

Powerful reply
SIR – I am writing to clarify the position of SA Power Networks regarding the proposal to construct an overhead 66,000-volt
sub-transmission line to provide electricity supply to the new Gawler East development area.
The power line is required to supply a proposed substation that, ultimately, will supply the residential development’s electricity needs.
The design is yet to be confirmed by us and is subject to future consultation through the Development Assessment Commission approval process.
Your front page photo (Power outrage, July 29) may be misleading for readers, as it infers the line will involve construction of transmission towers.
In fact, it will be constructed using Stobie poles, which are lower in height and visual impact.
The proposed power line route follows a planned connector road to the development area.
This will be a significant road operated by the Department of Transport.
By following the road, we believe we can help reduce the visual impact of the line.
The current plan is consistent with similar existing and planned residential developments around South Australia, such as Elizabeth, Golden Grove and Mount Barker, where our sub-transmission assets (ie 66,000-volt lines) are above ground and lower voltage distribution assets are predominantly underground.
This practice is largely driven by cost, as undergrounding sub-transmission lines is considerably more expensive than an overhead solution.
It should also be noted that maintenance for our sub-transmission lines, which are very reliable (in part because they are well above most vegetation), are not significantly different to those for underground lines.
In conclusion, for us to underground these lines in Gawler would require significant additional financial contributions from the developer and/or council.
On past experience, we do not believe they will consider this to be viable, but are happy to amend our plans should sufficient additional funding be forthcoming.
Paul Roberts,
SA Power Networks.
‘Boo’ brigade
SIR – Over recent weeks I have been surprised by the number of people who have been prepared to play down the booing of Adam Goodes.
I work alongside Aboriginal people and have listened to their response.
They respond to this booing behaviour personally and are hurt.
I recommend if you want to hear an Aboriginal person’s reaction to the issue, log on to The Guardian.com for an article written by Aboriginal journalist Stan Grant (The First Dog on the Moon cartoon is very good, too).
Sue Coldbeck,
Gawler.
Time zones
SIR – Rocket science is not required to handle time zones, just common sense.
If Broken Hill, situated at the western extremity of NSW, can set its time zone to SA’s, to accommodate its physical location, surely the west coast of South Australia, including the likes of Ceduna and Port Lincoln, can also select an appropriate time zone to suit themselves, as indeed Broken Hill has done.
It’s that simple. Not hard, really.
Rick Drewer,
Gawler East.
A few questions
SIR – Has anyone noticed that the new speed cameras on the western end of the Northern Expressway are located on a slope up to and down from the adjacent bridge, which is specifically against the installation and operational guidelines for speed camera installations?
Has anyone noticed that the new “horse training” speed limit signs along Two Wells Road are located in the gravel run-off area of the road shoulder, rather than in the grassed verge, where all signage is supposed to be located?
I sometimes saw an old man riding a horse-drawn rig across Two Wells Road in the mornings and evenings. 
Since the new “horse training” speed limit signs have gone up, I haven’t seen anyone at all with a horse. 
Can anyone say if the horse or rider has died, and whether the now unused “horse training” zone can be removed?
Peter Harper,
Dover Gardens.
Butterflies
SIR – Regarding the article in The Bunyip (Community Environment Page) about butterflies in the garden, I have grown plants to attract them and it is great to see them among my cottage garden.
It is also great to come across cocoons hanging from different areas and to see the changes of colour before the butterfly finally hatches.
Margaret Cheffirs,
Gawler.
Mind-boggling
SIR – Earlier this year there was much discussion about the large numbers of corellas in the district and, unless I have missed something, the Gawler Council has made no decision on what to do about what most people think is a problem.
Your readers do not need to be reminded about the damage which these birds are doing day and night, especially to the stately eucalypts, which are a hallmark of this town.
Recently, during visits to the Fleurieu Peninsula, I realised the effects of the explosion in the seal population along our local coastline and in the Lower Lakes and Coorong.
The penguins on Granite Island, which generations of us have enjoyed, are gone, the fisher people’s livelihoods are being seriously affected, and the seals are even slaughtering unsuspecting pelicans.
A couple of weeks ago, the Minister for Conservation, Ian Hunter, said that there is not really a problem, and then it was announced the other day that the government proposes to erect a viewing platform on the barrages, all the better for visitors to see the seals!
I almost checked the calendar to verify that it was not the first of April.
The mind boggles: might we see similar platforms in strategic locations around here?
R.D. Rogers,
Gawler South.

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