Improvements and maintenance
Preliminary plan for agreement for alterations to towpath at Brotherton by Yorkshire Electric Power Company for Ferrybridge Power Station
"Map of the Aire and Calder Navigation from Castleford to Leeds and Wakefield shewing the improvements proposed by Thomas Telford, Civil Engineer, F.R.S.L & E"
"Plan of the Aire and Calder Navigation from Leeds & Wakefield to Ferrybridge, with the several proposed cuts and canals for improving the same and also several Railways to communicate therewith..."
"Plan of proposed new cuts and canals for improving the Aire & Calder Navigation from Leeds and Wakefield to Bulham Clough in parish of Ledsham and also of several railways to communicate therewith all in the West Riding of of the County of York"
"Plan of the proposed canal from Wakefield to Ferrybridge, 1827 [and] Plan of a canal deposited by the Aire & Calder Co[mpany] in 1825, also of the cuts and improvements in the River Calder proposed in 1827"