Construction sections for light draft monitor Umpqua, built by Snowden and Mason in Brownsville, PA in 1863-1865. General Inspector Stamp: Light Draught Monitors General Inspectors Office Sheet No. 11, dated 08-05-1863, signed by Alban C. Stimmers, General Inspector. The General Inspector Stimmers had work with Ericcson, the designer of the original Monitor. The perceived success of the Monitor lead to a rush to build light draft monitors, to operate in southern estuaries and rivers. Stimmers was selected to head the engineering of this effort. For a variety of reasons including an excessive number of change orders while the vessels were being built, caused excessive cost overruns and total failure to meet contract specifications. This monitor class was the first major ship acquisition failure of the U. S. Navy. The debacle crushed the engineering career of Stimmers. Related vessel: Umpqua.