 Additional minor sources of income include the sale of surplus federal real estate and taxes on motorboat fuel.Funds from the Land and Water Conservation Fund have been utilized over the years on projects both large and small.LWCF has helped state agencies and local communities acquire nearly seven million acres (28,000 km²) of land and easements controlling further land, developed project sites including such popular recreational areas as Harper's Ferry in West Virginia, California's Big Sur Coast, and the Greater Yellowstone Ecosystem in Montana, helped maintain Yellowstone National Park, and helped to build and maintain "thousands of local playgrounds, soccer fields, and baseball diamonds."