Grain Millers Inc. is planning a $24 million expansion of its St. Ansgar operations, with incentives approved by the Iowa Economic Development Authority Friday.

The authority’s board approved tax credit assistance totaling $550,000 for the project under the Enterprise Zone program.

Grain Millers processes grain-based food ingredients for cereals and baked goods, along with other industrial and consumer markets.

The Eden Prairie, Minn.-based company plans to build a 33,433-square-foot building to house processes that would add value to its products. In addition, the project would add another packaging line and equipment to package canister oatmeal products.

The project also would bring a highly automated pelletizer to make pellet bi-products in St. Ansgar.

Work on the project is slated to begin in December and conclude in November 2015. A total of 10 jobs will be created.

The project is one of seven approved by the authority’s board Friday, the largest of which was a $13 million expansion of the Pioneer Hi-Bred International facilities in Johnston.

The project calls for a new 180,000-square-foot office and lab complex to be leased by Pioneer, and for the construction of a new greenhouse for genetically developed agricultural products.

The board approved $4.356 million in tax credits under the High Quality Jobs Program for the project, which is expected to add 100 jobs. Design work and site preparation are expected to begin by the end of this year, with construction to be completed in the fourth quarter of 2014 and hiring to begin in the second quarter of 2013.

“It has been a great month for economic development in Iowa,” said Governor Terry Branstad. “With the $1.7 billion project earlier this month and now another seven job creation and innovation projects today, Iowa’s economy is heading in the right direction.”