Over time, ponds often begin to fill as dead algae, leaves, and other organic materials settle at the bottom. In a healthy pond ecosystem, aerobic (oxygen breathing) bacteria will break down all of this organic material quickly and efficiently.
However, if a pond does not have adequate amounts of these decomposing bacteria to break down all the organic material, the pond will begin to fill, and its depth decrease. Once this occurs, many people hire contractors for dredging installation services.
Before any pond can be dredged, regardless of whether it is private or not, the pond has to receive certain permits (how many permits depends on location and extent of the dredging). Permits are necessary because, under the Federal Clean Water Act and Amendments, the Corps of Engineers is required to regulate pond dredging in accordance with certain environmental criteria.
The permits require information, including the number of materials to be dredged, the location, and condition of the disposal site, names and addresses of nearby landowners, and likely environmental impacts.
The permits also require sketches of the pond dredging plan, disposal site, as well as before and after water depths. Because the pond depth is required the pond must be also surveyed – all of these things will add to the overall cost. Because dredging is so costly, it should only be implemented when it is absolutely necessary.