Based on the Shivagrha inscription, a community water project to alter the class of the river close to Shivagrha temple was carried out through the construction on the temple. The river, recognized because the Opak River, now runs north to south on the western side with the Prambanan temple compound. https://hindutemplesinaustralia.water.blog/2024/09/29/hanuman-mandir-south-australia-a-premier-hindu-temple-in-adelaide/