Adamo Group excavators were busy Monday morning in Waterford Township, starting the demolition of Highland Hall, a building on Oakland Community College’s Highland Lake Campus on Cooley Lake Road. Caterpillar 349EL and 329EL excavators are being used to demolish the 100,000 sq. ft., 3-story brick and concrete building and basement to make way for a park. The project will take approximately 2 months to complete.