Potholes are usually circular shaped holes in the asphalt layer of the roadway. The Streets Department will repair a pothole within a business week. Weather conditions may lead to temporary fixes or delays. Potholes filled by non-city agencies may take longer to fill. Cave-ins (sometimes called sinkholes) are irregular shaped deep holes that penetrate through the concrete base caused by undermining. Water conditions and piping must be tested prior to the repair, but permanent repairs are expected to be fixed within 45 business days. During winter months barricades or cones will be placed until weather conditions improve. Ditches are rectangular excavations in the roadway. These cuts are made by utilities and plumbers to reach underground lines. While contractors are responsible for filling pavement temporarily, the Streets Department will restore water and plumber ditches permanently. Ditches created by Philadelphia Gas Works (PGW) are restored and repaired by PGW. During winter seasons temporary tamped-down cold patching material is used until the weather permits permanent restoration. Service requests for potholes, cave-ins, and ditches can be reported through 311’s various channels.