Laurie is a Gravois Arm town, upstream of the busy water at the mouth. Requests from this stretch are often a single-well dock, a tired steel frame, or a refoam on a dock that has been in the family for years. New construction happens too. The permit path is the same as at the dam.
Shallow coves and walkways
Back coves on the Gravois get thin when the lake is down. Ameren’s normal design target is a drawdown to 650 feet, and 645 feet in an emergency. Before you ask for dredging, read Appendix B’s order of operations: try a deeper spot on your own frontage, or a longer walkway, if that still fits the setbacks and the cove-width rule. Dredging is the last resort, and it is its own permit (Ameren lists dredging-excavation at $500 on the permitting page). The lake-level guide explains the elevations. The Gravois page explains how far a dock may reach into a cove.
A longer residential walkway is still only 6 feet wide. That limit does not grow because the cove is shallow.
Refoam and repair
If the dock lists, choose refoaming and say how old the dock is. If the frame is soft or the roof sags, choose repair and describe both. A builder who sees only “Laurie dock” cannot tell those apart. Photos of the outer corner, where freeboard shows, are the useful ones.
Permits and builders
A modification or a new dock is $550. Refoaming is work Ameren says must be done by a certified dock builder or the owner, with a permit before it starts. Check the current builder list rather than a magnet on an old truck. The standards are in the certification guide.