While severe winter weather in North Dakota’s Bakken shale continued to affect volumes at ONEOK Partners (NYSE: OKS), the midstream MLP more than overcame those issues to post higher results than last year’s first quarter. That performance helped fuel relatively stable results at its general partner, ONEOK (NYSE: OKE). Meanwhile, ONEOK remains on pace to close its acquisition of ONEOK Partners during the second quarter, which will position the combined entity for healthy growth in the coming years.