Waterfall

Design C is a waterfall, to be ran along the center of the south side of the bridge.  Placement is here because the south side is more industrial, and the pedestrian walkway is on the north side anyway, looking out over the river, the new apartments, and the lake.  This design moves water, possibly grey water from a sub pump, up the large white columns, through irrigated garden hose, or punctured pvc pipes that line the length of the center of the bridge.  The holes will create a stunning visual for passerby's, illuminated by lighting, and will enhance the experience of being on the bridge, under water and also above water.  Lights on the water from the outside and inside will be used to enhance the space, from both perspectives.  Using smaller hoses or pipe will ease the pressure needed, although if a firehose were used with precut pvc, a sheen of water could be created to be run at intervals during the event, much like a fountain show. 

Design D is just a difference in placement from Design C, moving the emerging water from below the public space to above it, which I think is a much better place to have it coming from.