In 1946, the Stanton Company paid £1,500 (), to Shipley Collieries for all of the canal south of the Shipley boundary, in order to safeguard its water supply. This did not include either Shipley or Mapperley reservoir, as the canal company never owned the freehold of these. The shares of the Nutbrook No 1 Company were transferred to the Stanton Company in late 1948, and this is where ownership still lies. Stanton Ironworks expressed interest in purchasing Mapperley reservoir when the National Coal Board sold the Shipley estates in 1966, but there were objections to their intent to raise and lower the water levels as required.