Thank you for the kind words.
As of the time of writing, you can no longer access the tunnel, (this will change in the future). You can however walk right up to the lock gates and peer in, (as I had done just last weekend – 29th October 2010). The whole tunnel has been completely cleaned and cleared of all rubbish, discarded goods and graffiti.
The whole area has been listed by the Department of Lands for environmental and heritage protection.
To visit the Helensburgh Station Reserve, please refer to the link below.
I stumbled upon this tunnel today whilst trying to find the old station site. Was surprised to see the ugly steel posts at the north entrance, (I guess your update has explained why). Couldn’t get up close to this entrance due to all the overgrowth and water. Thank you so much for all the info in your blog, it has provided me with an interesting read 🙂