Frequently required to walk, sit, talk, drive, hear, bend, stoop, twist, and balance; need the ability to occasionally kneel and crawl; need the ability to grasp manual controls and the ability to use foot controls and operate gas, diesel, and electrically powered equipment. Physical Demands: Essential functions involve significant physical demands related to repeated lifting of up to 50 pounds unassisted, 100 pounds with assistance rarely; carrying tools, materials, and equipment over rough terrain; climbing, reaching and bending.