How to keep a channel clear of sand at mouth open to a lake
We have a channel that is used to access an area where boats are moored. Over the winter, mother nature saw fit to fill our channel with sand. This is the first time we have ever seen a full fill-in. We would like information about how we can clear out the sand and then prevent it from occurring in the future. E.g. should we be putting in rip-rap that extends out into the lake? If so, how far? In the images attached, the first two taken on 27 April already show an impassible channel. The 3rd image taken only a week later shows additional blockage due to sand coming in from the lake (or so we assume). our idea is to extend the Rip-Rap shown out further. 10 additional feet on the right-side (when looking at image2) and 40 additional feet on left side (essentially this would have the left and right be uniform in their extension towards the lake). We are prepared to engage and pay someone if we can identify the subject matter expert(s) that could help advise us on this endeavor.
Huron County Michigan
Thank you for reaching out to us with this issue. After discussing this issue with a colleague, we wanted to share the following the recommendations to potentially help address this issue, but please note that it is a complex, site-specific issue.
- Familiarize yourself with related permitting issues (both EGLE and USACE). You can find some shoreline permitting information here (http://www.mishorelinepartnership.org/shoreline-permitting-information.html).
- Check out this resource, Adapting to a Changing Coast, University of WI Sea Grant Institute: https://www.michigan.gov/documents/deq/deq-wrd-greatlakes-shorelands-Wisconsin_Adapting_to_Changing_Coast_639521_7.pdf. This guide outlines different types of shoreline protection strategies, and for each strategy, there are links to different resources.
- Reach out to Matt Warner, Office of the Great Lakes, who may be able to help diagnose this problem using Google Earth and LiDar data. Here is his contact information:
I hope these recommendations help, and please let us know if you have additional questions.Matt Warner | Coastal Hazards Specialist
Coastal Management Program | Office of the Great Lakes