Around $4 million in local property tax dollars are at stake in a two-year-long legal battle between the Hemphill County Appraisal District and MidCoast G&P (Oklahoma) L.P. MidCoast filed a lawsuit challenging the appraised values for 2019 and 2020 on property where its pipelines are located. Hemphill County was not alone. As many as 30 other counties in Texas were slapped with similar…