Uncle Sam accidentally touched off an avalanche of energy merger announcements in the first half of 2018. All it took were two policy changes -- new corporate tax rates and tweaking a rule used to set prices for energy pipelines -- to erode the tax advantages for master limited partnerships (MLPs). As a result, many parent companies decided to roll up their partnerships under one roof.

Simpler organizational structures could yield significant benefits for individual investors. In addition to being easier to follow and understand, it will make it easier than ever to own some of the most important pieces of energy infrastructure in the United States. The proposed merger between Williams Companies (NYSE:WMB) and Williams Partners LP (NYSE:WPZ) is a great example, as it owns some of the best natural gas infrastructure in the United States. Here's why investors should be bullish on the multibillion-dollar merger.

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1. Improved financial flexibility

Williams Companies expects to receive a healthy increase in financial flexibility after rolling up the 26% of Williams Partners LP that it doesn't own. Timing plays a big role, as the parent will own 100% of the contributions from new growth projects coming online this year. For instance, the consolidated company's adjusted EBITDA is expected to leap to $4.55 billion in 2018, then to $5 billion next year. 

That's expected to boost distributable cash flow (DCF) from a midpoint of $2.75 billion this year to a midpoint of $3.1 billion in 2019, allow the company to grow its distribution 10% to 15% both this year and next, and provide 170% distribution coverage next year. In fact, the excess cash available after paying dividends will be enough to cover more thanb half of growth capital expenditures slated for 2019. That makes Williams Companies well positioned to capitalize on the most important growth opportunity in natural gas. 

A natural gas pipeline under construction.

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2. Top play on Appalachian gas growth

What the Permian Basin in West Texas and New Mexico is to the nation's crude oil production growth, the Marcellus and Utica shales in the Northeast are to the country's natural gas growth. Collectively referred to as Appalachia by some, the overlapping geologic formations are responsible for 41% of natural gas production from all of America's shale basins. That's what happens when a region increases total natural gas output by 16 billion cubic feet per day (Bcf/d) in a span of just five years.

But it may just be getting started. In the next five years, the Marcellus and Utica shales are expected to add up to 17.3 Bcf/d of natural gas production. That will help to fuel the expansion of industrial chemical production in the region and help the Southeast transition from coal-fired power plants to natural-gas-fired power plants. Few companies are better positioned to exploit the growth opportunity than Williams Companies. 

That's because it boasts 7.8 Bcf/d of natural gas gathering capacity in the region. Well, it's really because of where that gathered gas ends up: the company's Transco pipeline, the country's largest natural gas transmission system, which connects lucrative gas fields in Northern Pennsylvania to markets in the Southeast and along the Gulf Coast. It also provides thousands of miles of expansion opportunities along the corridor and ample opportunity for high-margin growth. It should be no surprise, then, that half of committed growth capital in 2018 and 2019 was slated for Transco. If the merger goes through, then investors can own all of that growth potential with just one stock. 

An LNG carrier.

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3. Upstream play on LNG

Transco may begin in the Northeast, but it promises to play an integral role in the continued expansion of the country's liquefied natural gas (LNG) exports. Williams Companies estimates that LNG export volumes will grow by 7.6 Bcf/d along states hosting the Transco pipeline. That includes the just-started Cove Point LNG project in Maryland, the soon-to-commence Elba Island LNG project in Georgia, and a slew of major projects dotting the Gulf Coast. 

The overnight growth of the global LNG industry, driven largely by new projects in the United States, provides an important new growth opportunity for long-term shareholders. In 2018 only 9% of all contracted volumes along Transco went to LNG customers, compared to 22% for power generation customers and 46% for natural gas utilities customers. Expect those percentages to balance out a little more evenly in the next decade as Williams Companies plows growth capital into expansion projects aimed at serving its new customer group.

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Will the merger proceed as planned?

There's some room to question whether or not Williams Companies will follow through on its plans to purchase Williams Partners LP. That's because yet another rule change in July could actually nullify, from a business perspective anyway, the rule change announced in March regarding the pricing of pipeline takeaway contracts. If MLPs become viable business structures once again, then it could keep the partnership and parent company apart.

That said, the sudden influx of regulatory uncertainty in the last two years suggests this merger may very well proceed as planned so as to reap the benefits from a simplified corporate structure. Assuming the merger proceeds as planned, investors have multiple reasons to be bullish on the consolidated company. 

Maxx Chatsko has no position in any of the stocks mentioned. The Motley Fool has no position in any of the stocks mentioned. The Motley Fool has a disclosure policy.