I built the edges of the Chartier creek using window screen material as the base (hot-glued) and then applied Sculptamold over that. Next, I glued in a lot of dense growth.
For water I decided to use Gloss Medium, which was worked into ripples with a large painter's brush.
The Fort Pitt Bridge Works building that protrudes into the modeled space has been built and glued into place. An S-scale figure is placed next to it to give you an idea of how big this building is.