Canal this trend. Yet in other countries canals grew in size as construction techniques improved. During the 19th century in the US, the length of canals grew from to over 4,000, with a complex network making the Great Lakes navigable, in conjunction with Canada, although some canals were later drained and used as railroad rights-of-way. In the United States, navigable canals reached into isolated areas and brought them in touch with the world beyond. By 1825 the Erie Canal, long with 36 locks, opened up a connection from the populated Northeast to the Great Lakes. Settlers flooded into regions serviced by
Hatherton Canal re-aligned canal. In 2006, the engineers Arup produced a feasibility study for a replacement route for the destroyed section which would link to Grove Basin on the Cannock Extension Canal. Environmental concerns led to a second feasibility study being produced by Atkins in 2009, for a route which connected to the derelict Lord Hayes Branch on the Wyrley and Essington Canal. A short section near the junction with the Staffordshire and Worcestershire Canal is navigable, and the cost of restoring the rest and building the new route to the Wyrley and Essington was estimated at £44.1 million in 2009. The