SUGAR LAND, TX — (Marketwire) — 09/21/12 — Commodity prices have dropped off highs reached in 2011. Reports continue to stack up regarding Chinese reduction in demand and production for mined resources such as iron ore and coal. The mining boom in Australia has slowed and some of the big mining companies like Rio Tinto (NYSE:RIO), BHP (NYSE:BHP) and Fortescue Metals Group (ASX:FMG) have announced reduction in capital expenditures as a result.This is coming at a time when construction activit