The Williamstown and Lyndoch Landcare Group Inc. was formed in 1989 with a focus on roadside vegetation and creek line restoration in the Tweedies Gully area of the Barossa Valley, and in the establishment of a green corridor between Sandy Creek Conservation Park and Kaiserstuhl Conservation Park.
In 1995 the group was instrumental in the purchase and rehabilitation of a disused sand quarry at Altona for conservation purposes. Hydraulic mining of sand ceased on this 50-hectare site circa 1960. Natural regeneration took place, assisted by mining rehabilitation and the Landcare group. Studies of the site in 2001 revealed forty species of native orchids and a diverse seed bank of remnant native flora. Over 100 species of birds have been recorded, also a number of reptiles and mammals.
The construction of walking tracks and seats, along with the continuing management is being undertaken by the Williamstown & Lyndoch Landcare Group Inc. Ownership of the land has been gifted to The Barossa Council who provide funds to assist with upkeep and weed control.