The Resources Management and Planning Appeals Tribunal dismissed the Tarkine National Coalition's appeal against the West Coast Council approval of the company's Riley mine, near Tullah.

Deputy Premier Bryan Green said the tribunal recognised that any impacts caused by the mine would be acceptable and manageable.

However, coalition spokesman Scott Jordan said the tribunal's decision was contradictory.

``It's an odd decision. They have effectively agreed with our concerns, added new conditions to address those concerns and yet dismissed the appeal,'' Mr Jordan said. 

``They have conceded, as the company did, that the erosion control plan that was put forward was not only inadequate it was completely the wrong plan for the soil type and so have inserted a condition requiring the company to go away and do the work it should have done to qualify for a permit.

``Some of the conditions around the [Tasmanian] devil don't address the underlying issue that devils are going to be harmed on that road.

``We will be taking further advice.''

The project has federal environmental approval, for which the group is also considering federal court action.

Mr Green said the Riley mine would inject about $40 million a year into the state economy and combined with the recently approved Shree Minerals mine near Smithton and HardRock Fingal coal mine would create jobs.

``Venture Minerals has already supported over 90 local businesses and invested more than $30 million in Tasmania in the past five years,'' Mr Green said.

Opposition mining spokesman Adam Brooks applauded the decision.