Silver Creek Engineering provided the site design for the new orangutan exhibit. Site services included the design of drainage, storm water quality, erosion control, water distribution, sanitary sewer, and onsite utilities. The site features rain gardens, a cistern system for irrigation, and a storm water lift station. In addition to providing these site services, we faced some unique challenges in creating an "orangutan-proof" environment. This included designing storm inlets bolted to the concrete and welded to the frames to prevent the orangutans from removing them.