Final answer:
Whether dredging a creek to make it deeper requires a floodplain permit depends on various factors such as location and local regulations. Negative impacts such as increased erosion and disruption of the surrounding ecosystem can occur if proper precautions are not taken.
Step-by-step explanation:
Whether dredging a creek to make it deeper requires a floodplain permit depends on various factors specific to the location and local regulations. In some cases, a permit may be required to ensure that the dredging activities do not cause negative impacts on the floodplain, such as altering the natural water flow or affecting the habitat of the surrounding ecosystem.
Examples of negative impacts that could occur include increased erosion, changes in sediment transport, and disruption of plant and animal life in the floodplain. To determine whether a floodplain permit is needed, it is important to consult with the local authorities responsible for managing and regulating the waterways and floodplains in the area.