John Porter
Chief Financial Officer at Williams Companies
Thanks, Alan. Starting here on Slide 2 with a summary of our year-over-year financial performance. Overall, 2022 financial performance continues to be quite strong. Beginning with adjusted EBITDA, we saw a 15% year-over-year increase for the third quarter and a 12% increase for the first nine months of '22 versus '21. As we'll see on the next couple of slides, our adjusted EBITDA growth has been led by our core large-scale natural gas transmission and gathering and processing businesses, complemented nicely by growth in our upstream joint ventures.
Our adjusted EPS increased just over 37% for the quarter and 34% year-to-date. Available funds from operations, AFFO, which is basically our cash flow from operations less working capital fluctuation, and non-controlling interest cash flows grew in line or better than adjusted EBITDA at 15% year-over-year for the quarter or 18% for the nine-month period.
Also, you see our dividend coverage on this page based on AFFO was 2.4 times for third quarter and 2.29 times year-to-date. Our debt to adjusted EBITDA metric continues to improve based on our strong growth in adjusted EBITDA and our capital investment discipline, now reaching 3.68 times versus last year's 4.04 times.
So now let's move to the next slide and dig a little deeper into our adjusted EBITDA results for the quarter. Again, the third quarter built nicely on the strong start we've seen this year with 15% growth reflecting the combined effect of the performance of our core business and upside from our upstream joint ventures. Walking now from last year's $1.420 billion to this year's $1.637 billion, we start with our upstream joint venture operations that are included in our Other segment, which were up $60 million. Since our first new production in the Haynesville came online in April of this year, we've seen a rapid ramp in volumes that will continue through the remainder of the year. As Alan mentioned, the strategic purpose of our upstream joint ventures is to fuel growth in our core related gathering assets, and that's certainly what we see happening in 2022.
Shifting now to our core business performance. Our Transmission and Gulf of Mexico business improved $41 million or 6% due to improved contributions from both Transco and our Gulf of Mexico businesses. Transco saw higher revenues, largely from the Leidy South expansion project, which came online in phases last year. Gulf of Mexico was significantly higher in '22, due in part to the lack of hurricane-related impacts that occurred in 2021.
Operating and maintenance costs were higher, driven in part by higher maintenance activities but we are tracking very close to plan through the first nine months of the year. Our Northeast G&P business increased $22 million or 5%, driven by top line gathering and processing revenue growth on slightly lower volumes. Gathering and processing rate growth was supported by a combination of factors, including higher commodity-based rates, annual fee escalations and other expansion-related fee increases that more than offset the lower cost of service rates at our Bradford franchise.
Overall, Northeast volumes were 10.8 Bcf per day and roughly in line with our current forecast for total 3Q volumes. We continue to expect an increase from this volume level for the fourth quarter. But as we've mentioned in past calls, our '22 plan for the Northeast has always been higher EBITDA versus 2021 on pretty flat volume growth. However, as Alan mentioned, we remain well positioned to resume stronger volume and EBITDA growth in the Northeast in 2023, driven by several expansion and optimization projects.
Shifting now to the West, which saw another impressive quarter of year-over-year growth, up $80 million or 31% over 2021. I should mention that $27 million of the $80 million was attributed to our Trace Midstream acquisition, which closed on April 29 this year. So even without Trace, the West still increased $53 million or 21%. In the West, we continue to see upside from our commodity price exposed rates, especially in the Barnett and Haynesville as well as substantially higher volumes in the Haynesville that drove a 12% overall increase in volumes for the West and that's excluding the Trace acquisition.
Next, we saw a $4 million or 12% increase for our gas and NGL Marketing Services business. This increase was despite taking a $54 million lower of cost or market adjustment to our gas and NGL inventories in September of this year. Generally speaking, most of this adjustment, which was associated with our gas and storage will result in higher margins when those products are sold out of inventory late this year or early next year.
So again, another strong quarter with 15% growth in EBITDA driven by core business performance and upside in our upstream joint venture operations.
Let's move to Slide 4 and look at the year-to-date comparison. Through the first nine months of '22, we've now generated 12% growth in adjusted EBITDA over 2021. Three strong consecutive quarters for this year. So stepping now from last year's $4.152 billion to this year's $4.644 billion, starting with the $77 million of first quarter of 2021 Winter Storm Benefits that we're showing here in gray, and then moving to the $182 million contribution from our midstream operations which were Wamsutter related in the first quarter of '22, and then begin to have a more significant Haynesville component in the second and third quarters.
Our Transmission in Gulf of Mexico business has seen 4% growth year-to-date, driven by Transco's Leidy South expansion project and strong first quarter '22 seasonal revenues and also higher Gulf of Mexico results due to less hurricane-related impacts in '22 versus '21, partially offset by higher operating and maintenance costs.
The Northeast G&P business has now seen 6% growth year-to-date, driven by higher rates on overall flat volumes, as previously discussed. The West has seen an impressive 27% growth year-to-date, driven by higher commodity base rates, but also a strong 11% overall volume growth, excluding the Trace acquisition.
Finally, our gas and NGL Marketing Services segment is up $32 million, driven by favorable commodity margins as well as the new contributions from the Sequent acquisition that closed on July 1, 2021. And the year-to-date comparison was also unfavorably impacted by lower cost or market adjustments on inventories as discussed in the third quarter comparison, which as we discussed, should result in higher margins in the future. So an impressive $491 million or 12% increase to land us with over $4.6 billion of adjusted EBITDA through the first nine months of the year.
Before I turn it back over to Alan, I'll offer a few thoughts for full year 2022 financial guidance. As we previously announced, based on strong third quarter performance and expectations for the fourth quarter, we anticipate full year adjusted EBITDA will be near the high end of our previously announced guidance range of $6.1 billion to $6.4 billion, which implies a strong fourth quarter. We see multiple contributors to this expected strong finish to the year, including continued growth in our upstream joint ventures, but also growth across our other business segments versus our third quarter results.
One other note regarding the third quarter, you probably noticed in our 10-Q that we did initiate share repurchases in September. As we discussed on our second quarter call, we stand ready to take action on share repurchases, and we see a pullback in our valuation, and that's what we did in September. Our share buyback principles center around a returns-based approach considering our current equity yield plus a level of expected growth in the business. We are more confident than ever in the long-term growth of our business, and so we remain ready to purchase additional shares as an important element of our capital allocation strategy.
Debt financing costs have also been topical lately with the sharp rise we've seen in borrowing costs. We've included some helpful information on our well-positioned debt portfolio in the appendix, but I'll briefly touch on a few key facts. First off, we have an entirely fixed rate debt portfolio with an average rate of 4.78%, and a weighted average maturity of 12.2 years. Second, following our well-timed August debt issuance and subsequent call of $850 million of 2023 notes recently in October, we now only have $600 million of maturities in 2023.
And finally, we will continue to enjoy excellent financial flexibility with our $3.75 billion credit facility. So again, with our expectations to finish 2022 near the high end of our adjusted EBITDA guidance, this would amount to over 13.5% growth versus 2021 and a four-year CAGR of about 8%, driven by continued growth in our core business as well as contributions from our Trace acquisition and upstream JV operations.
So with that, I'll pass it back to Alan for closing remarks. Alan?