These three MLPs all have yields of around 7% or higher.Pipeline operators with strong cash flow, steady growth projects, and well-covered payouts can be the backbone of an income portfolio. Let's look at three master limited partnerships (MLPs) that offer ultra-high yields, dependable operations, and steady growth. To begin investing in these names, $1,000 is a great starting point. But these have the type of steady operations that you can also feel free to dollar-cost average into over time.Energy Transfe ...