Queensland Government MP Alex Douglas says most Liberal National Party (LNP) members oppose a cruise ship terminal on the Gold Coast.
The LNP Government and the Gold Coast City Council is soliciting expressions of interest to develop part of the Southport Broadwater and expect the private sector to develop the area.
Dr Douglas, the Member for Gaven, addressed about 2,000 protesters on the Spit yesterday, saying his party's plan is expensive and dangerous.
"I said that the current proposal to put a cruise ship terminal in the Broadwater is flawed," he said.
He has also previously tabled his concerns in State Parliament.
"Coffee rock is at a depth that you would have to blast it to get rid of it and it's of course poisonous and very hard," he said.
"You can't economically do it either because the cost of doing so is horrendous." Dr Douglas says the party's own rank-and-file reject the proposal.
"All of the party all believe the same thing - there seems to be a lack of understanding, possibly of people who ought to know better," he said.
He says some LNP elders have back-flipped.
"John-Paul Langbroek, Lawrence Springborg, have all spoken in opposition to exactly this type of proposal before," he said.
"There's plenty of film footage of them saying exactly the same thing." Dr Douglas says the proposed development flies in the face of LNP policy.
He says the National Party and the LNP have previously rejected development in the area.
"There was no consultation - it was just an announcement that was it - straight into an announcement," he said.
"We've got over 14,000 members across the state - we've resolved that we will guarantee this land in perpetuity for parklands and successive leadership teams have restated it." 'Misunderstood' agreement However, Deputy Premier Jeff Seeney has shrugged off Dr Douglas's claims the cruise ship terminal would be against LNP policy.
Mr Seeney says the process is about seeing what is possible.
"There is no Broadwater project yet," he said.
"What the expressions of interest will bring to the surface if you like is whether or not there are any viable projects that can be considered.
"People misunderstand the agreement that was reached between us and the Gold Coast City Council was to explore the possibilities and to allow the market to bring forward what they believe is possible." Mr Seeney says it is reasonable the Government explores possibilities for the development of a cruise ship terminal on the Gold Coast.
The proposal is being pushed by Gold Coast Mayor Tom Tate and Mr Seeney says it should be investigated.
"The Gold Coast City Council and the current mayor were elected on a platform and are very strongly supportive of the development of a Gold Coast cruise ship terminal," he said.
"We, as the State Government, have been negotiating with them since they were elected about how the proposal might be developed." Meanwhile, Mr Springborg declined to comment, while Mr Langbroek and Councillor Tate could not be contacted for comment.