The Daw End Branch from Catshill Junction to limestone quarries and limeworks at Hay Head was also opened in 1800, some 5.4 miles (8.7 kilometres) long with no locks. Over the years it has suffered from mining subsidence, with the result that many of the embankments are now much taller than when they were constructed. The 1954 Act allowed the final section to the limeworks to be abandoned. Surrounded now by Hay Head Woods, it is still partially watered, and the area has been declared a Site of Important Nature Conservation (SINC).