"Coastal Bulk Shipping has been able to show the reduced carbon footprint of moving our cargo by sea.
"They are also working with transport company Philip Wareing Ltd from Methven who, with the confidence of the partnership, have built grain silos in Washdyke near the Timaru Port.
"This allows the grain to be moved to suit trucking loads, minimising empty running. The overall result is a significant reduction in greenhouse gas emissions for the movement of our product.
"The movement of our product through the Whanganui port provides not only resilience to our supply chain, but also the reduction in emissions is in keeping with the company's aim of achieving long-term sustainability."
Coastal Bulk Shipping owner Doug Smith said details around the contract were commercially sensitive but it was for "a significant number of years" and would help the development of Whanganui's port activity.
"It enables us to go out to market to identify potential southbound loads," Smith said.
"The vessel has been very busy of late and having the grain contract is a big part of that."
In the past few months, the Anatoki had brought in 2500 tonnes of dolomite from the South Island.
Smith said the Government's indication of an future funding announcement to boost coastal shipping could be beneficial to his company.
"Time will tell," he said.
"We have to be competitive, otherwise they will just continue to push road and rail options."