Enormous! What’s BURIED In Southern Utah Below Sand Hollow Reservoir?

Great for Recreation And Even Better for Water Storage

Sand Hollow State Park is one of the most popular spots for recreation in Utah. Open water combined with nearby sand dunes brings in boaters and off-road enthusiasts from Utah, Nevada and Arizona.

The reservoir was created in 2002 from a natural depression in the Navajo sandstone and water pumped in from the Virgin River. As good as the opportunities for fun are, the reservoir is even more important for Southern Utah’s water supply. 

I’m old enough to have camped at the bottom of the rock out cropping that has become a popular place to jump off the cliffs. It took nearly four years to fill to capacity and create the mini-Lake Powell that is enjoyed today. 

The Water Stored in the Rock

The great thing about Sand Hollow is not only the water storage capacity that you see boats and personal watercraft skim around on, but the capacity of the underlying sandstone is even more important.

Navajo sandstone acts somewhat like a sponge and can soak up water in the rock and the aquifer underneath. This increases the water storage available in a big way, storing multiple times the amount below ground. 

Read More: See the Plane On the Bottom of This Utah Reservoir

Picture the water stored in the stone deep beneath the reservoir that can be recovered by surrounding wells. This water is not subject to evaporation as the water on the surface. It is available as the population grows and provides needed water in times of drought. 

There are also underground pipes that connect with Quail Reservoir and make it possible to send water back and forth and maintain the levels of both. Without this amazing piece of modern engineering, St. George and the surrounding area would have run out of water years ago.