Last December Williams announced its Leidy South Project, a new expansion of the Transco pipeline in Pennsylvania (see Williams Unveils “Leidy South Project” to Expand Transco in PA). In early August Williams officially filed a full application with the Federal Energy Regulatory Commission (FERC) to build Leidy South (see Williams Files Leidy South Project with FERC to Expand PA Transco). However, FERC is not the only agency with a say in whether or not the project moves forward. The Pennsylvania Dept. of Environmental Protection (DEP) must grant Leidy South a federal Clean Water Act Section 401 water/stream crossing permit.