In late 1775, the company had decided to build a branch, which left the canal between Renishaw and Staveley, and ran generally southwards for about to the turnpike road at Norbriggs. This may have been to help with transport to Chesterfield, until the main line was completed, but in 1777, the company leased Norbriggs Colliery. Henshall supervised its operation, and transport of coal to the branch canal was improved by the provision of a "Newcastle Rail Road" in 1778, which used wooden rails. The company pulled out of running the mine in 1797, when they advertised it to be let. Water supply was initially by a reservoir at Pebley, which was later supplemented by reservoirs at Harthill, Woodall and Killamarsh. Near Worksop, a private branch was built to serve the Lady Lee quarry, which ran for about , while at Netherthorpe, a branch connected to the East Inkersall tramroad, which served pits near the Adelphi Canal. A gasworks was later built at the junction, and while the 1877 Ordnance survey map shows a short stub of the branch, connecting to the Seymour and Speedwell Branch railway, by 1898 a railway siding had replaced it, leaving just a basin at the junction to serve the gasworks. Another private branch was built in 1840, which crossed the Norbriggs road at Netherthorpe to serve the Speedwell Colliery. It was built by the Barrows, who also owned Staveley ironworks, but by 1860 had been replaced by a railway.