All the lakes these caches will take you to are man made, or natural water catchments damed to increase their size, and it is where the electricity that powers the state is created. We hope to highlight it's course through visits to various lakes and canal systems and show these Hydro created area can indeed also be lovely places. It is a beautiful area, which has some amazing wildlife. We have seen Wedge Tailed Eagles, Sea Eagles, various other raptors, Devils, both species of Quolls, Wombats, all varieties of wallabys/pademelons etc, Echidnas and of course snakes and lizards, oh and even deer.. to name a few, not to mention the various coveted fish species lurking in the lakes.
Thanks to HEC Tasmania and Forestry this area is a labyrith to explore and enjoy. I hope you see the beauty in it as we do, I am an artist (willberech) and these lakes have been my muse for many years, there are hidden gems everywhere waiting to be discovered, and beauty wherever you turn your eye. Unfortunately of late we have noticed some inconsiderate visitors have been leaving rubbish in their wake, so please be respectful of the environment and bring a bag 
This cache is placed at the dam face of Lake Echo. At time of placement the entire dam face was high and dry as we are running quite low on water in the State as present, hopfully this winter will bring some relief.
Lake Echo is the top right hand lake in the Derwent Catchment 'Y' so along with Butlers Gorge, it is one of the 2 lakes where the water that creates our power begins it's journey..
Additional specific information, stats etc on this lake can be found nearby the cache location.
"The hydropower potential of the Derwent catchment was realised in 1934 when construction began on the Derwent scheme. The last power station was commissioned in 1968.
There are two sections in the Derwent hydropower scheme - upper and lower. This is because of the difference in how the water is stored in the sections. Visually the scheme resembles a Y shape.
The upper section of the scheme uses larger deeper lakes than the lower section for water storage. The four main power stations in the upper section can release water as it is needed to generate electricity. The upper section is formed from the Nive River system in the east and Derwent River system in the west, making up the top of the Y.
The lower section is run-of-river, this means that water keeps on flowing creating a cascade effect down the river. There are six power stations in the lower section using the Derwent River water multiple times. The lower section forms the ‘tail’ of the Y."
*courtesy of the Hydro Tasmania website
http://www.hydro.com.au/energy/our-power-stations/derwent