On the same Missouri wetlands as the previous pictures on another pool.
An outflow pipe with removable top slide inserts commonly called a drop log structure although this more modern design does not use logs.
This outflow is flowing into yet another pool and its design of removable 6 inch high inserts allows us to control the water depth on the high side.

At the end of the season those wetlands to be worked either for levee repair or planting have the water flow set to drain. In the case of this wetlands of several pools we frequently do not drain all pools each year keeping some wet through the year.
In the case of this wetlands it are many times the small points that allows maximum return of effort. The draining of this wetlands will allow the fescue to pioneer across the previously worked levees creating a strong surface roots structure and cover to prevent erosion.
