Kevin Boone
Executive Vice President and Chief Commercial Officer at CSX
Thank you, Mike. It really has been great to see how well our teams have been working together and the positive momentum we are building with our customers, as they recognize CSX's focus on service. This teamwork is allowing us to build on new opportunities and drive attractive and profitable growth across all of our end markets.
Business conditions in 2023 were challenging for many of our customers with several of our key markets experiencing volatility driven by a number of factors, including inventory destocking. On the positive side, we saw many of these markets show improvement in the fourth quarter which, combined with our industry-leading service, provides optimism that the team can deliver strong revenue growth.
Turning to Slide 12, we look at our merchandise performance. As you can see, our revenues were up 5% on both the quarterly and annual basis. Even with the effects of reduced fuel surcharge, volume increased by a solid 3% for the quarter and 2% for the full year, outpacing domestic industrial production that's been effectively flat. And we've delivered pricing results that reflect the higher inflationary backdrop that we've all experienced.
Looking at the details of the quarter, automotive performed well even with the temporary disruption caused by the UAW strike, as total volumes held up and we continue to see leverage, and we continue to leverage service to gain new business. Chemicals was challenged over most of the year, but delivered positive growth in the fourth quarter, driven by shipments in plastics, sand and waste.
For fertilizers, strong domestic demand and higher CSX shipments of potash exports supported volumes. Short-haul phosphate shipments remained constrained by its supply issues, which weighs on volumes, but provides a tailwind for yields. Metals has continued to be an area, where our service provides growth opportunities. And in minerals, infrastructure-related demand continued to be very healthy over the quarter with new cement production supporting volumes.
For forest products, volume was modestly lower year-over-year, but increased sequentially as pulpboard demand has started to show signs of recovery. While the ramp-up in ag and food over the fourth quarter was challenged, with Southeastern feed buyers remaining well supplied from local crops, combined with slower ramp-up in exports.
Now, as we head into 2024, we are encouraged with the momentum we've built across the business, and we see many opportunities across the end markets we serve. Our service continues to differentiate CSX in the marketplace, and we are excited about the opportunities this offers us to work with customers to collectively grow our businesses together.
Turning to Slide 13, coal revenue decreased 1% for the fourth quarter, as we lapped very strong export pricing from a year ago. Volumes remained positive, growing by 3% for the quarter and 8% for the year. Our coal business continues to be strong with service levels accelerating in the fourth quarter and global export prices supporting U.S. production.
At the end of the last quarter, we indicated that export demand remains strong, that lower natural gas prices and reduced restocking demand would likely weigh on domestic shipments, and that's exactly what happened in the fourth quarter, with export tonnage up a full 27%, while domestic tonnage declined by 30% [Phonetic]. Coal RPU of just over 3,200 per ton was up 5% sequentially, in line with our expectations.
For the new year, we are optimistic supported by continued strength in export demand as global benchmarks for both met and thermal currently remain at healthy levels. We also see incremental production growth on our network in West Virginia, which will primarily be focused on the export market.
Domestic demand in 2023 was supported by months of aggressive restocking at utilities and a very hot summer. With stockpiles at more normal levels, demand upside will largely be dependent on weather conditions in 2024. That said, total electricity demand growth remains substantial, especially in the Southeast, driven by new industrial capacity to data centers to even EV charging stations.
Turning to Slide 14, fourth quarter intermodal revenue decreased 4% on flat volumes. For the full year, revenue decreased 11% on volumes that went -- were down 7%. Lower fuel surcharge drove the largest impact to yields.
Our domestic intermodal business continued to perform well, with volume increasing sequentially and growing in the mid-single digits on a year-over-year basis. We saw growth with our key partners that continue to experience industry-leading service performance, which was recently highlighted in JOC's customer satisfaction results. Our ability to deliver domestic growth was an extraordinary team effort, especially given the significant challenges facing the trucking market.
In International, volumes were lower compared to last year, but we were encouraged to see improvement each month with December actually showing modest year-over-year growth, as the positive effects of more normalized retailer inventories gain traction. Our team has continued to work hard to maximize our opportunities, which showed up in the growth, as we work to build new partnerships, create new service offerings and leverage higher activity at the inland ports that we serve.
Positive market trends are taking shape as we head into 2024, and we expect the combination of a more supportive market, new conversion opportunities and service offerings to drive year-over-year growth in both the domestic and the international business. We continue to monitor the evolving situations at both the Panama Canal and the Red Sea. To date, we have not been significantly affected by any changes in our customer behavior, but we stand at the ready with the capacity and capabilities to adapt as needed.
Finally, as we turn the page to 2024, I'm excited about the opportunities ahead. The team is accelerating our efforts in many areas of our business to work hand-in-hand with our customers to identify areas for growth, from industrial development to identifying market-specific operating metrics that enhance the customer experience, to even working like closely with our rail partners to unlock growth. These are just a few of the focus areas for the team.
Now I'll hand it over to Sean to review the financial review.