Jul 01, 2016 at 12:58 PM CST
An association representing Wisconsin frac sand mining companies lost half of its membership in one year due to a market slowdown.
The Wisconsin Industrial Sand Association was formed in 2012 when demand for frac sand was beginning to skyrocket. Today, only two of the original four member companies remain.
A drop in demand for sand made it difficult for members to stay in the organization, said WISA President Marty Lehman.