Damage caused to rail infrastructure from the recent cyclone in Queensland, Australia, and potential extended shipping queues may impact Stanmore Coal Ltd.'s April and May sales.

The ASX-listed miner said April 3 that while its Isaac Plains mine is now operational and the port is expected to be operational later the same day, availability of rail infrastructure is less certain given damage incurred to areas of the Goonyella network.

Stanmore said it has been advised that while a portion of the rail network is now in recovery mode, material sections of the network remain unassessed and the operator has not yet given an indication of when railings can restart.

There has been no material damage to the Isaac Plains mine and repairs have been completed with full access restored and the mine reopened.

However, regional damage to communities, roads and power lines continue to impact the availability of workers.

Stanmore said it expects the mine will operate with reduced personnel numbers until the end of this week.

The company added that it will provide an update on the impact on its full-year production forecast once the situation is fully understood.