Lehigh County
The first posted crossing is half a mile away
Start with the road rather than the quarry, because here the road comes first. The nearest structure posted for load sits 0.54 miles south of the middle of this place, on a township road, and it clears 35.0 US tons operating.
Half a mile is not a route detail. A crossing that close is on the way out for a large share of local addresses, and 35.0 tons admits a truck carrying something rather than a full legal load.
The North American Rail Network maintained by the Federal Railroad Administration and the Bureau of Transportation Statistics places a yard 2.85 miles north of here.
Lehigh County posts a third of its own bridges
That first crossing is not an outlier. Lehigh County maintains only 38 bridges of its own in the National Bridge Inventory and posts 13 of them — about a third, which is one of the heavier county posting rates in this state.
Within 10 miles the National Bridge Inventory records 344 structures and 26 are posted for load: twelve township, nine county, three borough and two state. So although the network is dense, the restricted crossings are numerous and spread across four kinds of authority.
The tightest is 8.0 US tons 5.97 miles away on a county bridge, which takes no commercial vehicle even empty.
One operator holds three of the quarries
Those roads run out to a limestone belt with a single dominant name on it. New Enterprise Stone & Lime works the Kutztown Quarry 7.03 miles west with 13 people, the Ormrod Quarry 8.40 miles north with 23, and the Egypt Quarry 9.62 miles north-east with 2.
Three pits, one operator, three quite different crew sizes — and the 2-employee site is a reminder that an employment figure describes a site rather than a business. A truck off that fleet may have run any of the three, and their road environments differ.
The largest crew nearby is not stone at all: a cement plant 10.60 miles north-east with 80 people, with a dimension-stone pit 10.22 miles south carrying 38. So the fleet mix here is broader than a quarry district usually gets.
Cement puts a different truck on the same roads
That plant 10.60 miles north-east changes the fleet mix here. Cement moves in pneumatic bulk tankers rather than tipping bodies, on short lanes into a very large and very close consuming market, so the same posted crossings are being met by a quite different vehicle.
A tanker has its own inspection list — the manway and gasket, the vent and relief valve, the interior — and blower hours to read against the miles. On short repetitive lanes the blower and clutch hours climb faster than the odometer, so a low-mileage tanker here is not automatically lightly used.
A pneumatic tanker sold anywhere in the Lehigh Valley has almost certainly carried cement or a cement-adjacent powder rather than anything abrasive, because there is no frac sand industry in the valley. That narrows the question rather than answering it: lime, fly ash and slag travel the same way and were not investigated.
With 26 posted crossings inside 10 miles, a fair number of these trucks ran part loaded some of the time, which puts the hoist, clutch and driveline cycles ahead of the mileage. That is the country rather than the truck.
- Very likely — the nearest is 0.54 miles south. Working round it is our job, not yours.
Between the Kutztown Quarry 7.03 miles west and the Ormrod Quarry 8.40 miles north they turn up steadily.