James C. Fish
President and Chief Executive Officer at Waste Management
Thanks, Ed. And thank you all for joining us. Our team delivered strong results in the third-quarter, growing adjusted operating EBITDA by 11% compared to last year. The outperformance was driven by the strength and resiliency of our collection and disposal business. In a quarter where the preponderance of macroeconomic discussion is centered around signs of a slowing economy, WM's collection and disposal operating EBITDA grew by more than 12%, and margins expanded 60 basis-points.
Collection and disposal or grant organic revenue growth was 8.8%. Elevating quarterly total revenue, company revenue grew to about $5 billion for the second consecutive quarter. The growth was delivered, excuse me, the growth we delivered was driven by deliberate steps to grow revenue and efficiently manage costs, which together position us to overcome inflationary pressures. The solid results through the first-nine months of the year positioned us well to achieve the updated guidance provided last quarter even with a recent downturn in recycling commodity prices. An important contributor to our improving trend in operating expenses and overall cost structure is the strategic decision to leverage, through automation, the tight labor market and high attrition. John will touch on this as he discusses our significantly improved turnover in more detail.
By the end of 2022, we will have reached almost a 1,000 full-time positions in difficult to source job categories that we've chosen not to refill, putting us well on our way to reducing our labor dependency by 5,000 to 7,000 jobs. We're pleased to see early benefits from our investments to reduce our cost-to-serve, while also differentiating WM by enhancing the customer experience. Continuing on this discussion of our 2023 and beyond strategy, we're very pleased with our investments we're making in both renewable natural gas and recycling business.
On RNG, we continue to make great progress on building out our new plants as we expect 2023 to be the heaviest capital investment here. We're on-track to see meaningful earnings contributions from 2022 and 2023 investments in 2024, with fully incremental operating EBITDA contributions coming in 2026, which are conservatively estimated at $400 million. Our recycling business, not only provides an important service that our customers want and need, it continues to be a profitable business generating solid returns.
We worked hard to adjust our business model over the last several years, and we saw the results of that in the third-quarter, particularly in our automated facilities. Our five fully automated MRFs are now delivering differentiated results relative to our single-stream network with about 30% lower labor cost, 13% lower total operating cost, nearly double the operating EBITDA margin, and most importantly, a 40% improvement in key safety metrics. While we try to complete four automation projects and add one new MRF in 2022. The significant investments that we're making in growing and automating our MRF network are strengthening the business by reducing costs, increasing throughput and improving product quality.
As with our RNG investments, 2023 will be the heaviest year of capital spending in the rebuilding of our single-stream MRFs with the biggest increase in incremental earnings coming in 2024 and 2025 as the majority of the rebuild and new MRFs come online. Additionally, as part of our commitment to growing our recycling business, we announced that we are acquiring a controlling interest in Avanguard Innovatives US business. The planned acquisition will grow our plastics recycling capabilities by delivering circular solutions for films and clear plastic wrap used commercially. We expect to receive investment returns comparable to our recycling automation investments, yet on a more prolonged horizon, given that operations are in the early stages of scaling. We plan to provide a more detailed update during our fourth-quarter earnings call once the deal closes.
Also, on the M&A front, we completed more than $200 million of acquisitions in the third-quarter, putting us well on our way to our full-year expectation of $300 million and $400 million. We closed two nicely sized solid waste tuck-in acquisitions in Indiana and Arizona during the quarter. These acquisitions are a complement to our existing operations, and we expect to generate solid returns and earnings contribution in 2023.
And finally, I'm pleased to share that earlier this month we reduced -- no, we released our 2022 sustainability report, providing details on our ESG performance and outlining our new 2030 priorities. These new priorities are strongly linked with our overall company strategy and directly support expansion of our recycling and renewable energy businesses. Even as we celebrate continued progress in our sustainability journey, we're already focused on driving improvements in the future.
In closing, I want to thank the entire WM team for their hard work and dedication. We're focused on finishing 2022 strong, while continuing to progress our investments in recycling and renewable energy and automation to, drive growth, I'll now turn the call over to John to discuss our operational results for the quarter.