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Designs adorn a retaining wall located at the 19th Street interchange. Left of the wall above will hold vehicles exiting SR 16 at 19th Street, while non-motorized traffic will travel on the lower right. 19th Street will feature an entrance to the Scott Pierson Trail.A newly reconfigured Orchard Street entrance to SR 16 will improve traffic flow in the Center Street/Tyler Street/Orchard Street area. A number of intersections along the route are being improved to work as a system and complete the final SR 16 configuration as it was originally designed plus meet future needs.Collecting and treating stormwater run-off in areas such as the retention pond above improves overall water quality. These ponds are filled directly with highway runoff and also water from pipes, such as the one seen below.An underground pipe, part of the drainage system for SR 16 is seen above. The drainage systems are designed to improve water quality as they capture and retain heavy metals and petroleum products. These drainage systems also provide flood control, since during heavy rainfall, water is stored in holding areas and gradually released. These modern techniques assure that runoff released will be of much higher quality than older methods. A worker attaching rebar to connect the girders for the Center Street flyover ramp can be seen above. There are three girders per span, with two spans completing the the 1,500-foot ramp.WSDOT crews inspect the progress of the Center Street flyover ramp. The crane is lifting form for ramp's wing wall. The wing walls look like wings when looking from the top down.