Work on a major development on the edge of a country park would go ahead despite a campaign by residents to preserve trees in its path, the Housing Department said yesterday. The development at Quarry Bay Country Park comprises 1,800 Home Ownership Scheme flats for 6,000 people, two secondary schools and a primary school. A flyover near Mount Parker Road is also planned. The projects are scheduled for completion by 2005. But the move would mean more than 300 trees and the red-brick Woodlands mansion, more than 100 years old, would be demolished. A Housing Department spokesman said they had targets to meet and it was unlikely that an alternative site would be found in the urban areas as land was so scarce. The department plans to build 40,000 to 50,000 flats in 2004-2005. The spokesman said the department had noted residents' concern and would do its best to ensure possible nuisances were minimised. About 20 residents petitioned the Chief Executive's Office yesterday and handed in 20,000 signatures opposing the plan. Provisional Urban Councillor and Eastern District Board member Joseph Lai Chi-keong asked if the site could be avoided. 'Our District Board rejected the proposal four times but the Government still decided to go ahead. The Government campaigned for green issues, but destroyed green areas at the same time,' he said.