Despite railway competition, Bourton Wharf's trade continued to increase until 1848, when 823 long tons of Somerset coal were landed there. Thereafter however the railway increasingly dominated coal and other freight traffic, and trade at Bourton Wharf declined rapidly. Bourton Wharf had a small revival in the 1860s but in 1876 the wharf received only 27 tons of Somerset coal, which equates to a full cargo for only one narrowboat in the entire year. Bourton Wharf handled small amounts of cargo in the mid-1890s, at least some of which was local traffic to or from Melksham and Wantage. By this time the Wilts & Berks' maintenance and dredging had deteriorated to the extent that narrowboats could not operate fully laden. In 1901 the Stanley Aqueduct over the River Marden in Wiltsire collapsed and the little remaining traffic virtually ceased. The Wilts & Berks Canal was formally abandoned in 1914.