At the Pennsylvania Route 438 bridge near the village of Scott, the peak annual discharge of South Branch Tunkhannock Creek has a 1 percent chance of reaching . Approximately further upstream, it has a 1 percent chance of reaching and at a Pennsylvania Route 438 bridge further upstream, it has a 1 percent chance of reaching . Below a tributary known as South Branch Tunkhannock Creek Tributary J, the peak annual discharge has a 1 percent chance of reaching .
