One Day on the Boulder River

The Boulder River at 8 a.m., 8 p.m. and 10 p.m.

The limestone bridge at Natural Bridge Falls collapsed in '88. But for most of the year, the water flows underground through a cave to emerge beneath what will probably become a future bridge. Sometimes, during high runoff, the river also pours through other caves and spills over the top to form a triple waterfall.

This is what happened last week after heavy rains fell on the area. But a few hater on that same day, the water level in the river dropped more than a foot, and the river reverted back to just one falls. That evening, Venus led Jupiter and Regulus (a star) towards the horizon at dusk (click to enlarge).