Greenways require funding for initial construction and ongoing maintenance since they do not generate revenue. To obtain funding, the benefits of a greenway must be identified and potential public and private funding sources that match those benefits must be applied to through grants and donations. However, obstacles to funding include greenways not enhancing local business sales, benefits being small compared to other greenways, and grants often not covering maintenance costs. Applicable grants include those for trail planning, construction, restoration from state and federal agencies as well as private foundations focused on community wellness, culture and the environment. Volunteer organizations can also aid construction.