Apologies for the late reply. We were working to get some responses to your questions from our project team.
Here are some notes for you:
- The low bridges are temporary. There will be permanent bridges in relatively the same locations as the temporary crossings we currently have, with the exception being the crossing at Mile Post 261.56 (there is no permanent bridge at that location).
- We are hoping to keep the temporary bridges in the creek during runoff. If it appears there is going to be a safety concern, we will remove them. No one knows definitively how the creek will behave, so we will be sure to monitor the creek.
- The abutments (supports) will only be on the banks. Attached are a "before" photo and "after" conceptual drawing of what the area with the bridge will look like.
- All the bridges have been designed to not be overtopped by a 100-year flood event and less. The freeboard (the room between the lowest portion of the bridge and the water level) on the bridges varies between 4.3 feet and 5.6 feet in a 50-year flood event. All bridges have a minimum of 6 feet during a 5-year flood event.
We had also received a question about why this was planned during runoff and at the most easily accessed run for Denver. Due to permitting and an incredibly difficult working terrain, this is when we can and must get this work done.
We absolutely appreciate the understanding and patience of the rafting community; you are a passion group, and we are looking forward to creating a safe and exciting trail experience for you and all outdoors enthusiasts in this area.
Please let us know if you have any other questions. We will check this thread periodically, and you can also reach us at 303-569-9972 and email@example.com