A fire possibly caused by a spark from a passing vehicle near mile marker 28 on Highway 64 near Rangely burned 2.7 acres. Rio Blanco County is currently under an open fire ban.RBC I The Rio Blanco County Board of County Commissioners adopted a resolution to imposed a ban on open fires in the unincorporated areas of Rio Blanco County Monday last. According to the resolution signed June 11, 2012, the commissioners have received…