The ideas for new trail segments range from the more easily achievable — developers on the riverfront south of the Loop including a trail as part of their project, for example — to more complicated ideas such as putting stationary or floating docks over the water in places where it is tough to build on land. The alliance does not know how much money it could all take but suggests that it could be paid for through a mix of private and public sources, including federal Congestion Mitigation and Clean Air funding.