Those figures put this county fifth in the state, and the one next door last
Those two rankings sit side by side and that is what makes them worth stating. Lawrence County maintains 33 bridges of its own and twelve of them fail NBI item 70 — 36.4%, fifth of the 109 Missouri counties with at least twenty county-maintained structures. Greene County, immediately next door, restricts 0.9% and ranks last of the same 109.
A small network with a third of it rated is a different working problem from a large network with a handful of bad crossings. There are fewer alternative routes to begin with, so each restriction removes proportionally more of the map.
Around this quarry specifically the National Bridge Inventory counts 123 structures within ten miles, 24 coded posted on item 41 and 20 coded below legal loads on item 70. The median operating rating of the item-41 group is 19.8 metric tonnes, which no loaded stone truck approaches.
The raw minimum is 4.5 metric tonnes and the lowest crossing that still admits a loaded commercial vehicle is rated 13.5, about 14.9 US tons. On the gross-weight scale a 13.5-tonne cap admits roughly 2.5 tonnes of stone over an empty tandem’s 11.0-tonne tare — a tenth of a legal load. So these crossings do not refuse a truck; they empty most of it.
Around the Chesapeake Quarry — twelve people on the MSHA roll, 0.08 miles from the middle of town — and across Lawrence County, this country turns over a steady amount of it.
- The lowest crossing near this pit that takes a loaded commercial vehicle is rated about 14.9 US tons, which leaves roughly a tenth of a legal load on the deck, so short part-loaded runs rather than long full ones is what the hours usually mean.
- It worked out of Greene County instead.Then say so — it is a genuinely different history. Greene County restricts 0.9% of what it maintains and ranks last of the 109 counties measured, against 36.4% and fifth here in Lawrence County.
Around the Chesapeake Quarry, and across a Lawrence County that rates 36.4% of its own bridges below legal loads, there is usually one sitting.