Claude E. "Ed" Elkins
Executive Vice President and Chief Marketing Officer at Norfolk Southern
Thanks, Paul, and good morning to everyone on the call. I'm starting on Slide 17, where our results for the quarter speak to the benefits of our diverse portfolio in that we were able to deleverage strong market conditions in our merchandise and coal markets to offset weaker conditions in our intermodal markets. This enabled year-over-year growth in revenue and revenue per unit in the first quarter.
As you can see, overall volume was flat, but total revenue increased 7% to $3.1 billion due to higher fuel surcharges and positive mix, which more than offset lower volume in storage revenue in intermodal. Volume and revenue were strongest in January when our service product was the best it has been in two years, and the truck market was showing signs of rebalancing. Volume and revenue decelerated throughout the quarter as service disruptions impacted our ability to meet customer demand in key markets and the truck market continued to deteriorate.
Our performance in January demonstrates that a customer-centric operations-driven approach can yield significant value for our customers and our shareholders. Within merchandise, volume growth of 5% was led by strength in sand, automotive, grain and aggregates markets. These gains were partially offset by weakness in demand for plastics and for pulp board. Volume improvement was the largest driver of double-digit revenue growth in merchandise this quarter, followed by higher fuel prices and price gains.
Intermodal markets were notably weaker this quarter, particularly within our domestic lines of business where a weak freight environment and a weakening truck sector combined to drive a 4% volume decline year-over-year. International intermodal was a bright spot this quarter with volumes improving 9% year-over-year on higher demand for IPI services, even as overall imports fell, which helped to mitigate some of the domestic declines. Intermodal revenue benefited from higher fuel surcharges and price this quarter However, not enough to overcome the negative impacts of lower storage revenue and lower domestic volume, which drove a 5% decline in revenue versus the prior period. Now I'd note that the combination of improving international IPI volumes and declining intermodal storage revenue is a strong indication that supply chain congestion is rapidly unwinding in the US.
Coal shipments in the first quarter were up 5% year-over-year, led by export, which is currently experiencing continued high levels of demand as well as greater coal supply in our service territory to meet that demand. Volume growth was muted somewhat by year-over-year declines in utility coal due to depressed natural gas prices and mild winter weather. Coal revenue was up 13% in the first quarter, driven by higher volumes, fuel surcharge and price gains.
Now moving to Slide 18. As we look ahead to the remainder of 2023, we expect near-term headwinds to pressure volume and revenue throughout the second quarter. However, we are optimistic that our service product will be much improved in the back half of the year, positioning us to return to growth when market conditions permit.
Additionally, we are walking on to the field today with the best marketing team in the business. And this team is working hard to identify new avenues to growth in the form of new markets to serve and new products to deliver. Even in a decelerating economy, we know that we can offer exceptional value to customers seeking to reduce their overall spend on transportation and reduce their carbon footprint. As we look at the rest of the year, Merchandise growth will be led by automotive shipments, supported by the forecasted 5% growth in US light vehicle production for the remaining quarters of 2023. Also contributing to growth in automotive shipments is a backlog of shippable ground counts that we will work through as our service improves. We also expect strong volume improvement in our metals market where improved equipment cycle times will enable us to serve unmet demand. Partially offsetting expected growth will be weakness in our chemicals markets where certain segments, like plastics, are experiencing weaker demand.
Facility downtime and increased pipeline capacity will also drive year-over-year declines in shipments of crude oil and natural gas liquids. Within our intermodal markets, volume in 2023 will be largely dependent on economic conditions, particularly the health of the American consumer. Currently, we see headwinds from excess truck capacity replenished inventories and a challenging consumer economy, and these headwinds are likely to persist throughout the second quarter, negatively impacting volume, particularly in our domestic lines of business.
Looking at the back half of '23, clearly, the economic conditions remain uncertain. We see continued weakness in the housing market, which negatively impacts demand for furniture, home appliances, electronics, all those things that want to move in a container. That market has not rebalanced as we anticipated earlier this year, with spot and contract truck rates continuing to fall throughout the first quarter.
So the timing of the rebalancing will have a large impact on our volume outlook. Additionally, our domestic partners outlook for the second half of '23 has dimmed somewhat. International intermodal shipments will be driven by demand for IPI, which is a function of import volumes, which is declining and supply chain fluidity, which is improving.
Fluidity has returned to supply chains faster than we expected, which will be a tailwind to volumes, but will negatively impact intermodal storage revenue for the remainder of this year. Taken together, we are optimistic for our intermodal business to overcome these near-term challenges and to finish the year with momentum to realize the long-term potential of this market. We have the best intermodal partners in the industry. And our team is working hard to ensure that we are positioned for success with them as the market turns.
Lastly, volume in our coal business for the remainder of '23 will be up versus '22 with growth in export coal shipments more than offsetting expected declines in utility coal. Strength in export coal markets will be driven by new coal production coming online at NS-served mines and sustained international demand for US sourced coal. However, the expected increase in volume will be more than offset by anticipated lower revenue per unit due to lower seaborne coal prices and reduced fuel surcharge revenue. The utility outlook is highly dependent upon weather and natural gas pricing, which is currently expected to average less than $3 per million BTU in '23, a more than 50% decrease from last year.
In addition, stockpiles are currently at increased levels, which further pressures demand for utility coal shipments. Overall, we have a cautious outlook for the remainder of '23. Improving service levels will be a tailwind, but persistent market headwinds and a stubbornly loose truck market will temper our ability to grow in the near term.
Overall, growth in 2023 will be dependent on the macro environment. We continue to put our efforts on things that we can control to deliver on our customer-centric operations-driven strategy. We are making the investments required to deliver compelling logistics value for the long-term through a simple, reliable and efficient customer experience.
Lastly, on Slide 19, I'd like to highlight a recent industrial development success that demonstrates the long-term value of locating along Norfolk Southern lines. Scout Motors, an independent US company backed by Volkswagen Group is locating a new manufacturing plant in Blythewood, South Carolina and a site served by Norfolk Southern. In Phase 1, this new plant will produce more than 200,000 new electric vehicles and create over 4,000 permanent jobs. The $2 billion investment by Scout will revive an iconic brand that last produced vehicles in 1980, and we couldn't be happier that Scout selected a site served by Norfolk Southern. We look forward to serving their business by the end of 2026.
Before I close, I'd like to say thank you to our customers who have supported us through the challenges of this first quarter. We appreciate every opportunity that they give us to participate in their supply chains, and we look forward to successfully growing these partnerships. We are confident in our ability to realize long-term growth and we look forward to delivering results for our customers and for our shareholders.
And with that, I'll turn it back over to Alan to bring us home.