Oneok, a US based company engaged in the gathering, processing, storage and transportation of natural gas, has planned to invest $300m to $355m between now and the end of 2012 in additional projects in the Bakken Shale in the Williston Basin.

These investments include up to $205m for the construction of a new 100 million cubic feet per day (mmcf/d) natural gas processing facility, the Stateline I plant, in western Williams County, North Dakota, and related natural gas liquids infrastructure.

The company also expects to invest up to $90m for expansions and upgrades to its existing gathering and compression infrastructure, and approximately $50m to $60m in 2011 and 2012 for new well connections adjacent to the Stateline I plant.

Another natural gas processing plant, Stateline II, is being evaluated and can add another 100mmcf/d of capacity if additional volumes become available for processing.

In aggregate, the Stateline I plant and related infrastructure are expected to generate EBITDA (earnings before interest, taxes, depreciation and amortization) multiples of five to seven times.

The Stateline I plant and related infrastructure follows the company’s previously announced natural gas gathering and processing and natural gas liquids growth projects totaling more than $1.1bn in the Bakken Shale.