Lambert Dirt Work & Heavy Equipment Before & After. We built a retaining wall for a spillway. In the pictures below you can look at what the spillway looked like before, in the process, and after we finished! The only heavy equipment needed for this job was the loader, and it is pictured at the end. Please give us a call with any of your dirt work or heavy equipment needs. We would love to tackle your next project… contact us for a custom quote!