Quickpits -- The Bakken, North Dakota, USA

Website link here. Photo here.

From the Bismarck Tribune:

Inventor Allen Stein of Colorado, a native of Bowman, has created a new above-ground water storage system for the oil and gas industry.

As an employee of Energy Services LLC, Stein, a 1982 graduate of Bowman High School, developed a 30-inch-high steel frame structure to hold up the edges of plastic liners to contain spills, such as from tanks holding hydraulic fracturing fluid.

From that came the Quick-Pit, a system using metal A-frames 10 feet high to create the outer wall of above-ground, plastic-lined pits which can hold from 30,000 to almost a million barrels of hydraulic fracturing and well-flowback fluids.

Similar article here.