 In the 1890s , the lighthouse was first formally proposed to mark the Norwalk Harbor . In 1899 , the United States Congress appropriated $ 60 @,@ 000 for the establishment of a light and fog signal at Greens Ledge . In 1900 , the Philadelphia Construction Company was contracted to construct the foundation and the superstructure . The design for this type of lighthouse was first realized in 1873 , from Major <unk> of the Lighthouse Board . The foundation form is made of identical curved @-@ iron plates with top inward @-@ pointing <unk> that are <unk> together and secured with knees . The assembled rings are lowered into the water and filled with concrete or stone , concrete for the Greens Ledge Light . A series of photographs from the work in 1901 shows the assembly of the three lower courses at Wilson 's Point , the lowering of the cylinder and the light in the fall of 1901 prior to a deposit of protective <unk> . 
