Since 1945, utility-related forestry has been a core element of the Penn Line organization. Today, we work for some of the na ... tion’s largest energy producers. We are a single source for broad capabilities in all aspects of vegetation management, including: Electric distribution line maintenance Electric transmission right-of-way maintenance Large-scale capital clearing for right-of-way corridors Pipeline mowing and right-of-way maintenance Cell site/gas well site preparation (including access-related construction) Mechanical side trimming Comprehensive herbicide management methods Forestry management services Storm restoration services read more