The Rising Influence of Rising Affluence

[OakesCS]

just a wee nitpick that doesn't negate your point. I think the 140 number is more than a bit high, at least for a single continuous fracturing job on a single well. 100 rail car loads of sand would be about 450 truck loads and i don't think a single well sees anywhere near that number for a continuous fracturing operation. This http://www.marcellus-shale.us/Marcellus_FRAC.htm shows what i think is a more typically sized operation. If fracturing different stages involves moving trucks in and out, then wells that are seeing multiple fracturing stages (sometimes dozens of stages) could see that many truck/rail loads of sand. I'm guessing that the latter situation is where the 100+ rail car load number comes from, however, i don't think these are typical cases.