The Trust are also working to promote the idea of a larger park where the combined waters of the Porter and Sheaf meet the River Don. The final culvert through which they run is decaying, and needs to be renewed or removed. They would like to see it removed, and are working to raise funding to allow that to happen. They would also like to see light wells added throughout the rest of the culverts, to enable wildlife to pass through them to reach the upper rivers, and believe that redevelopment as part of the HS2 high speed rail link could be the catalyst for that to take place. They are keen to ensure that public access to the course of the river is managed consistently, so that there is a continuous path, rather than isolated sections that do not join up.