Safe Propane Safety Update Propane Services The Energy needs of the Illinois Valley continue to grow and change, and Northern Partners Cooperative is positioned to fulfill those changing needs. From grain drying to industrial uses to home heat, let Northern Partners supply your propane needs. Northern Partners Coop offers propane tanks and installation along with the trenching in of the line from the tank to the house or shed. Tank contracts are available for 3, 4, or 5 years depending on the size of the tank. We have a complete line of regulators, tubing, and fittings. Northern Partners knows that the market changes every day and we want to help you with LP Market Management. NPC offers multiple drying contracts and home heat contracts. To get more details about propane service near you contact our Energy Office at 815.539.1080.