Chemical sealing of earth dams

Leakage is not a major cause of failure of farm dams in the Western Australian wheatbelt, but it is a problem in some districts where it can limit stock carrying capacity. Leaking dams are especially common in the West midlands, the north-eastern wheatbelt and the \u27jarrah-belt\u27 which extends from Bindoon, southward to Manjimup and Mt Barker (see map and Table 1). Some dams which leaked when first built have sealed themselves over the years. Others have been successfully sealed using sodium tripolyphosphate