The frac-sand company Emerge Energy Services says it owes at least $13 million to Wisconsin contractors in a bankruptcy case filed this week, on the heels of falling demand for the company’s products.
Emerge, which owns eight sand pits and processing plants in Wisconsin through its subsidiary Superior Silica Sands, has been under pressure in recent years from falling oil prices and increased frac-sand production in Texas. The company, which processes sand for use primarily in oil production and in building products and foundries, filed for Chapter 11 bankruptcy protection on Monday…