sentences:  The 1913 lock was a variant of the standardized Panama Canal design and was wide, long and tall with a lift.There was a wide, long and deep dry dock at the site, both the dry dock and 1913 lock were dewatered in 1977 when a sheet pile and cell closure were built blocking the upstream sides of the lock and dry dock.The lock and dam, as well as the rest of the river, can be viewed from a distance on the Observation Deck of the Keokuk Rail Bridge.