We've seen many signs of bear during the summer, but we always make a lot of noise so we don't have to meet one in person. We may feel like fools when we run into other humans after we've been singing or yelling, but it's worth the embarrassment to avoid a dangerous bear encounter. Emily Johngren runs her own business, a cleaning service, and has been volunteering with Cook Inlet Keeper for a year and a half. It consists of three or four shoe-size boxes stacked on top of a larger sweater box. The shoeboxes each have a row of holes drilled in one end.
Water flows out the holes and into corresponding holes in the lid of the box beneath.
The boxes are stacked in an alternating pattern, resulting in a zigzag flow of water. A submersible pump moves the water via a plastic tube from the bottom container to the top box. If the substrate is well below the water surface, this will be a run. For a riffle, the substrate should be at the water surface. The large box is the pool.