Complex sentence: Water from the Mowamba River is diverted to Jindabyne Dam via the Mowamba weir and aqueduct; that is part of the Snowy Mountains Scheme.
Split into simpler sentences: Water from the Mowamba River is diverted to Jindabyne dam via the Mowamba weir and aqueduct. The Mowamba Weir and aqueduct is part of the Snowy Mountains Scheme.