In the scenario I'm envisioning, my group is in a city. They've got a source of hydroelectric power, but a few downed power lines/utility poles are making it difficult for them to transmit the electricity. We're far enough post-apocalypse that they don't have any petroleum and can't use a car with a crane attached to it. Would it be feasible for them to design a crane or simple pulley system that could get the pole upright again (using the materials that might be readily available to them in a city, of course)? Is there another way they might get the job done?