sentences:  By 1889, he had enough to begin work.Unlike the Scugog Bridge, Bigelow ensured that his structure would be permanent from the beginning and constructed a majority of the causeway by removing the top layer of peat from the marsh, piling logs in lengthwise approximately a metre deep and covering the exposed surface with the same depth of earth.By early 1891, the causeway was completed, and shortly thereafter trees were planted along both sides.