My first 'more or less' successful massing had interesting transitions between slabs. I wanted to preserve that in my final massing. So I mixed glazing approach from my previous two attempts.

It took a lot of meticulousness to manipulate hundreds of splines... I wish, when I grow up, I could do it smarter.

My next step will be development of the site.

Have a holiday blast!!!... I'll post on the other side.

Before I make plans more detailed, and integrate surrounding area into the overall feel, I want to figure out new skin of the building. Its form as organic and plastic as the circulation; it is dipped and raised on the South side more to protect spaces from excessive Sun; it functions as a railing as well.

Structure of the building

... with strip of edging 

... and surface of the future glazing

Looking North

Looking South

Looking East (from park)

Looking West (from water)

For presentation

(ramp isn't complete, glazing isn't precise and isn't as organic as I want it to be, staircase is a mess)

Collage

Parti

Approach

Driving Force

Plans

Section

Renderings

Approach from the park

View from the river

Entering the lobby

Rollerblading space

Auditorium, Core, and Yoga spaces

Water activities area

In context

Another Final Mass

OK, so... this is something that I like, but so unusual that I have doubts about it. It follows parti more then any massing I did so far; it looks fluid, organic, and simply cool, it provides long ramps for exercise,  it allows enough space for the program, it has core to access all spaces, it has tall spaces with curved walls. It will require huge windows for ramps to make them less claustrophobic. I also missing main ramp which leads from the park to the lobby.

Rollerblading space

Cafeteria

Roofs 

rollerblading area beneath the ramp/bridge

Final Mass - progress

As of now, I think that I've managed to create a form that will allow me fit some interesting spaces in section as much as in plan. I'm working on floors and structural supports now. This are pictures that should give you an idea of sectional environment.

Space Distribution Update

Space Distribution

After my previous "available space" evaluation I start creating walls for the structure. It was something I didn't do before; weird shapes, new tools, and new approach took me quite a long time to conquer (sorry for disappearing for so long). At last, I've created the form for spaces which could be inhabitable.

Spaces are enclosed with walls, footprint of which I traced over in AutoCAD to start arranging program within. I'm still missing spaces for cafeteria, food prep, shop, and bike parking; they will be a part of the ramp, and I left plenty of spaces for integration.

"Water activities" space has a rectangular lap pool (50'x40') for scale, and area for saunas in the left top corner.

This is just a start of the process. Guided by your comments I shall finish shortly. After partitions are done I'll recreate them in 3D.

Preliminary Space Distribution

Preliminary Space Distribution

Before I start planing exact floor plans I need to see that my program will fit withing the shape of the building.

It looks like it does. My next step is to design building envelope, get exact in- and ex-terior floor footprints from the 3D model, export it to AutoCAD, and figure out space adjacencies with means of egress.