Kevin Boone
Executive Vice President and Chief Commercial Officer at CSX
All right. Thank you, Mike.
In the third quarter, as Joe and Mike both mentioned, we were presented with a number of challenges from storms, a strike at our East Coast ports, and another temporary outage at our Curtis Bay terminal. We are very proud of the level of communication throughout the CSX team and our focus on serving our customers through these challenges. This was highlighted by our most recent customer survey, out just this week with our Net Promoter Score at the highest level since we started measuring. With major storms impacting our network, we are working with our customers on the rebuilding efforts to ensure CSX is able to deliver the building materials and other essential supplies to the areas where they are needed. There's been a lot to manage through, even for a railroad with experience of CSX. But working together, we've been able to find creative solutions to keep freight flowing.
At a high level, market conditions remain a bit mixed. We are seeing continued strength in some of our merchandise markets. And while truck rates appear to have bottomed, there remains a soft market. Diesel and natural gas prices remain low and benchmark coal prices have moderated. All that said, we grew total volumes and revenue over the quarter, as our service-led initiatives continue to bring new business to our railroad. The team has continued to build momentum by working with our customers and we're going to continue to push hard against a mixed economic backdrop. And I'm excited about our upcoming Investor Day, where you will hear more from our commercial leaders who are laying the foundation to deliver profitable growth for CSX.
Let's first review our merchandise business as shown on Slide 7. As a whole, merchandise continues to be a great contributor for us. As we anticipated, volume growth accelerated this quarter, supported by new business wins, truck conversions and the ramp-up of industrial development projects. Revenue gained 6% compared to last year, driven by a 3% gain in volume and solid pricing. Note that with lower diesel prices, fuel surcharge was a drag on both total revenue and reported RPU. On a core basis or same-store basis, our merchandise pricing remains solid. Chemicals continues its positive performance for the year, delivering a 9% volume increase year-over-year. We've seen consistent broad strength across plastics, industrials, industrial chemicals, LPGs and waste.
In Ag and food, the second-half inflection has taken off, as we had hoped, with volume also up 9%, led by grain and feed ingredients as customers turn to the Midwest for supplies. Close collaboration with our operating team has ensured consistent service as a strong seasonal demand has kicked in. Forest products also saw a great year-over-year growth, with healthy improvement in pulpboard demand contributing to a 9% volume gain. Some of this new forest product business is shorter length of haul, which was a factor in 3Q reported RPU. Results in our minerals business were mixed, with volume up 1%. Cement is doing very well, supported by construction demand and the ramp-up of new customer facilities, but wet, rainy weather was a modest drag on aggregate shipments over the quarter. All that said, the underlying long-term trend remains very favorable.
Other markets we serve are facing more near-term challenges. As we've highlighted through much of this year, the metals market, particularly steel, remains soft with sluggish demand, ample supply, and low commodity prices. One reason for softer metals demand is a weaker-than-anticipated automotive market, where conditions have deteriorated. Volumes inflected negatively for us this quarter and mix was also a modest headwind to auto RPU. As Joe mentioned at an investor conference last month, the industry has seen consumer demand diminished by high retail prices and interest rates, which has led to higher dealer inventories and slower production. Our belief is that interest rate easing cycle will help these markets normalize.
Lastly, total fertilizer volume continued to trend negatively in the third quarter, so we were able to pick up some favorable spot moves. For the remainder of the year, we expect to see a carry-over of solid year-over-year momentum in chemicals, ag and food, forest products and minerals, while trends in metals continue to be challenged in the near-term.
Now, let's turn to Slide 8 to review the coal business. For the third quarter, total coal revenue declined 7%, a 2% decline in volume. As shown in our financial report, we saw export and domestic shipments move in opposite directions, with export tonnage increasing by 10% year-over-year and domestic tonnage decreasing by 12%. Low natural gas prices continue to limit the utility burn. All in, coal RPU was down 5% compared to last year and 7.5% sequentially, in line with our guidance last quarter and largely driven by the declines in global benchmarks for metallurgical coal.
Looking ahead to the fourth quarter, markets seem relatively stable. Utility stockpiles are sufficient. And though natural gas prices recently approached the $3 mark, we do not anticipate any near-term step-up in volumes. Export demand remains consistent, particularly from buyers in Asia and the Australian net benchmark has stabilized around the $200 level towards the end of the last quarter. Given the lag in our export contracts, we anticipate a modest to low-single-digit sequential decline of all in coal RPU in the fourth quarter.
Turning to intermodal on Slide 9. Total revenue declined 2% year-over-year, while volume increased 3%. International shipments grew at a solid mid-single-digit rate, while domestic shipments ended up effectively flat for the quarter. As we talked about in past calls, we did see a shift towards West Coast arrivals over the summer, which lifted our transcontinental interchange business to the East. We also opened up new business with several customer partners. Overall, we did see the domestic business gain modest momentum over the quarter, but activity with some of our main channel partners remains relatively soft. Total intermodal RPU decreased 5%, largely due to lower fuel surcharge and a mix with international outgrowing the domestic business.
We're pleased to see a relatively quick short-term solution for the ILA, as we did see the effects on our volumes during the strike. The trucking backdrop has remained challenged through 2024, but we do see signs of market conditions bottoming and are well prepared to handle more volumes as the market continues to improve and the team continues to find new business for the CSX intermodal network.
Summing it up, the team performed very well this quarter, especially given the number of external challenges we faced. Still, conditions for the fourth quarter are mixed, with certain markets continuing to show positive momentum, while other markets remain challenged, including those markets more impacted by the current interest rate environment. What will remain consistent throughout market cycles is our commitment to serving our customers. And we remain confident that our creativity will continue to create opportunities next year and well into the future.
We look forward to sharing more with you in November. Now, I'll turn it over to Sean.