(March 10, 2017, 4:00 PM EST) -- PITTSBURGH — An Ohio company that develops hydraulic fracturing wells on March 6 filed a brief in Pennsylvania federal court arguing that the district court should exclude evidence in its lawsuit against a fracking operator that pertains to fees charges by the well development company because the evidence is not related to the mineral rights dispute that is the actual issue being litigated (Ohio Valley Energy Systems Corporation v. DL Resources Inc., No. 15-00029, W.D. Pa.)....