 County Engineer and Public Works Director Ryan Tilges says the county is working with state and federal officials on an interim plan. Tilges says sediment impounded behind the dam kept the bridge piers in place, but a lot of that sediment washed away. Now with this rapid loss of this significant volume of sediment, all of those piling no longer have that lateral or side-to-side stability, and they're unbraced, so it's kind of a large bridge sitting there on very slim