Christopher D. Bohn
Executive Vice President and Chief Operating Officer at CF Industries
Thanks Bert. For the full-year 2023, the company reported net earnings attributable to common stockholders of approximately $1.5 billion, or $7.80 [Phonetic] per diluted share. EBITDA was $2.7 billion and adjusted EBITDA was approximately $2.8 billion. In the fourth quarter, we completed the acquisition of Incitec Pivot's Waggaman ammonia production facility. After adjustments and accounting for the value assigned to a long term supply agreement with IPL's Dino Nobel subsidiary, our cash purchase price was approximately $1.2 billion. The Waggaman facility has operated as expected since closing and has generated margin commensurate with our existing ammonia segment.
Looking ahead to 2024, we expect capital expenditures for the year to be in the range of $550 million and for gross ammonia production to be near 10 million tons. As Bert said, we experienced unplanned weather related outages in our network during January. During these outages, we pulled forward some planned maintenance activities. This should reduce scheduled downtime later this year, mitigating some of the production loss in January. As a result, we expect gross ammonia production for the year to be near our projection.
Commissioning of our green ammonia project at Donaldsonville is underway. We are currently evaluating the purchase of renewable energy credits to pair with the start-up of the electrolyzer to enable green ammonia production and maximize the value of the 45B production tax credit. We expect that the CO2 dehydration and compression unit at Donaldsonville will be ready for start-up in 2025. This will enable low carbon ammonia production and generate substantial 45Q tax credits. We are also making progress on other CCS opportunities with returns above our cost of capital.
Turning to the potential new low-carbon ammonia plant at our Blue Point complex in Louisiana, we completed our FEED study on a conventional steam methane reformer ammonia plant with CCS technologies. The FEED study estimates the cost of the ammonia plant at approximately $2.5 billion, we estimate another $500 million for scalable infrastructure, such as storage tanks and loading docks. Our FEED studies focused on autothermal reforming or ATR ammonia production technology and flue gas capture are progressing well. Alongside disciplined clean energy investments, we are committed to returning capital to long-term shareholders.
In 2023, we returned almost $900 million to shareholders through share repurchases and dividend payments despite being locked out of the repurchases for part of the year. We expect share repurchase activity to increase over the two remaining years on our current authorization. As you can see on slide seven and eight, on both a free cash flow yield and a precedent transaction basis, our enterprise value is significantly undervalued, supporting continued share repurchases.
With that, Tony will provide some closing remarks before we open the call to Q&A.