Roger has provided the following info and comment about the water level height gauge on Maria River, which may help with your assessment of road flood risk and conditions.

“If the height gets over 1 metre at high tide, then the water backs up to or over Maria River Rd. The gauge is located near the Hastings River junction I think? In the last big flood 18 months ago the water reached 2 metres which covered the mail boxes at Illa Langi”.