A. A retaining wall cannot be located within any easements without obtaining a license to encroach from the City. If you are not sure if the location is within an easement, check with the engineering department at City Hall. If a retaining wall will be over 4 feet in height, a professional engineer must design it. A. One explanation for the green color is that phosphorus is finding its way to the wetland. Phosphorus from fertilizers runs off lawns and ends up in area lakes and wetlands where it promotes algae growth.
Algae turns a blue lake green and damages the lake s ecosystem.
The source of the phosphorus is the fertilizer that residents apply to their lawns. A solution is to choose a fertilizer that is phosphorus free. The composition of fertilizer is indicated by a series of three numbers on the package. The middle number indicates the percentage of phosphorus in the fertilizer. Look for a middle number of 0 to be sure you are buying a phosphorus free fertilizer.