The Cogan House Covered Bridge was the only one on Larrys Creek to survive a major flood on June 1 , 1889 , which washed out most other bridges throughout Lycoming County . A large fallen maple tree formed a dam across Larrys Creek , just upstream of the bridge ; this dam blocked debris and diverted the brunt of the floodwaters . The same flood destroyed the Larrys Creek plank road and the canal at the creek 's mouth . The same storm system also caused the Johnstown Flood , which killed over 2,200 people
Johnstown Flood
Johnstown Flood
Cogan House Covered Bridge