Concrete chunks removed from tree roots, revealing eroded bank. Now, let's see a system to spread the flow and prevent the erosion

Please click on images of the stormwater outlet from the western portion of the Hill Place project where pieces of new concrete from paving that had to be redone was dumped but was removed this weekend. For related photos scroll down a few posts. The question now is whether the engineers can find a way to slow the flow and spread it along the riparian zone to prevent the washing out of the tree roots and further degradation of the Town Branch of the West Fork of the White River. The big detention pond that collects water from the western half of the project didn't fill up during the flash flood on Thursday because its outlet is too large and water immediately ran through the pond. It should fill during such a storm and release water LATER. If that pond had filled during the storm, the bridge at 11th street likely would not have had water pouring level above it during and for a time after the heavy rain ended. The small pond near the corner where the property of Robert Williams and Don Hoodenpyle meet at the Town Branch also needs a better control structure. It needs to be reworked to allow it to fill up during a storm and release water slowly later. And the control structure needs to allow it to dry up between storms in order to maximize storage capacity. The several medians and rain gardens on the property don't function as stormwater controls because there is little absorbent soil and a base that doesn't allow infiltration underground.
The Hill Place project is built in large part on a karst area, where water historically has soaked in and recharged the aquifer. The curbs keep water in the streets and send it straight to the stream during storms.