These roads were cleared by officials immediately.[31] Although there was no damage to dams and hydropower facilities,[2] damaged powerlines affected 43,158 customers.[18] About 55 km (34 mi) of optical cables and 289 communication stations were damaged, interrupting communication systems to 35,000 homes.[18] More than 200 people were trapped in Hailuogou National Geological Park [32] A landslide buried a tributary of the Dadu River, potentially causing water to accumulate.