Siegfried provided civil engineering, surveying, and landscape architecture for the culvert replacement at Alexandria and Five Mile Slough. This area, which acts as more of a retention basin, has a long history of failure, as previous clay pipe culverts had been stacked on top of each other before a road had been laid over the top. Siegfried designed a larger box culvert to remedy issues with debris, and improve water flow. As well, Siegfried proposed moving an outdated pump to stimulate more water flow and eliminate hazardous algae blooms and water hyacinth growth. A final step of the process was to establish a traffic plan, as the main road at Alexandria is the main artery to both Lincoln High School and Sierra Middle School.
