As Bradford's population continued to grow the Frizinghall works was deemed inadequate with no room for expansion.

The city's boundaries were extended in 1899 and it was decided that the most suitable site for a new works was on land owned by the Stansfield family at Esholt, taking the solution back to the original complainants.

After much legal wrangling the owners finally agreed to sell and in 1906 the whole of the Esholt estate was purchased for over £239,000.

Esholt Sewage Disposal Scheme: Working on the tunnel

The construction of the new works involved, among other things, the borrowing of huge sums of money and the building of a new canal basin and railway line. A tunnel beneath the canal towpath, along which compressed air forced sludge, was soon found to be inadequate at a time when the larger mills were each producing as much effluent as a small town.

Eventually a tunnel nearly three miles long through the hill between Frizinghall and Esholt connected the two sites The project was finally finished in the 1920s and the Frizinghall works closed in 1926.