The power company is publicly consulting about its plans to revisit old plans for dams at Queensberry, Luggate, Beaumont and Tuapeka Mouth.
One of its main communication tools - a web-based discussion board - has attracted 174 comments on 24 different topics.
The site is monitored regularly by Contact staff, who respond to questions and feedback.
Although one of Contact's latest comments suggests there is a chance all four proposals may never eventuate, it also claims there is a future for large-scale hydro-electricity projects to meet the future energy needs of the country.
Clyde-based projects manager Neil Gillespie, who has been responding to questions on the website, said a report shows the country will possibly need two big hydro-electricity dams by 2025.
"Contact believes there may be a future role to play for more large-scale hydro projects over the coming years if New Zealand is to continue increasing the proportion of electricity coming from renewable sources."
But meeting future needs might not just come from dams, he said as other power-generating options such as thermal, wind and natural gas, were investigated.
Understanding the effects of each dam project on the area and its people, including inundation areas, affected landowners, the economic, environmental and social impacts and transmission requirements was also important, Mr Gillespie said.
"Important to this process will be the feedback from the conversations that we have with local communities."
While Contact hoped to have a preferred hydro-electricity option for the Clutha early next year, he said this would not represent any commitment to push ahead with the option - "rather a more focused discussion around a clearly-defined proposal.
Until then, all these options and any others people might like to suggest remain open."
