No product, no byproduct...

Ag lime could be in short supply soon since so much limestone quarry capacity is idle.  Ag lime is essentially the fines from crushing to get rock for roads or concrete.  Guess how many foundations we've been pouring lately.

Second quarter earnings for aggregates declined as the impact of sharply lower shipments more than offset the earnings benefit from improved prices, lower unit costs for diesel fuel and cost control measures.  Aggregates shipments declined 31 percent from the prior year due to weak demand and wet weather.  The decrease in aggregates volumes reduced second quarter EBITDA by approximately $112million versus the prior year.  The increase in the average selling price for aggregates reflects wide variations across Vulcan-served markets.  Many major markets realized price improvement from the prior year well above the 3percent average, while certain markets in the far West and Florida reported year-over-year declines in average selling price.
By rationalizing production, reducing operating hours, streamlining the workforce and effectively managing spending, the Company offset some of the cost impact related to lower volumes.  Aggregates cash fixed costs were reduced17percent from the prior year’s second quarter.  The unit cost for diesel fuel decreased 54percent from the prior year’s second quarter, increasing earnings $0.12per diluted share.  [More from one of the largest aggregate producers]

You might want to check your supplier.