(Reuters) – Californian utility PG&E Corp said on Monday it was cooperating with the U.S. Forest Service (USFS) after the federal agency started a criminal investigation into the U.S. state’s largest wildfire this year. The Mosquito Fire has scorched 76,781 acres (31,072 hectares) as of Sept. 25. It has forced at least 11,000 people to evacuate from Foresthill, Volcanoville, Georgetown and other communities between Sacramento and Lake Tahoe. As part of the investigation, the USFS removed and took possession of one of PG&E’s transmission poles and equipment on Sept. 24, the utility said in a fi…