An aerial survey of the Ontario site, on the other hand, takes Tecia just two hours to complete, including both flight time and data extraction. Tecia’s drone not only gathered accurate elevation data for the entire 1,400 acre site, but it did so twenty times faster than a ground-based survey of just individual stockpiles. This represents a far greater data set and a ninety-five percent reduction in man hours.
A ninety ninety-five percent man hour reduction is impressive enough, but the biggest return-on-investment can be seen by looking at time and money savings over all six of Nelson Aggregate sites. A bi-annual survey of six quarry sites represents about 240 man hours. Compare that to just twelve hours needed to complete twice-yearly aerial surveys at all six sites. That’s a savings of 228 man hours.
In terms of money savings, the results are no less impressive. Nelson Aggregate spends about $3,000 to subcontract out a single ground survey. Bi-annual ground surveys of all six quarries cost around $36,000 total per year. Factoring in drone equipment and software subscriptions, the same amount of aerial surveys cost just $7,500 — $28,500 less than a ground survey. This represents nearly 80% in costs savings.
By replacing ground-based surveys with bi-annual aerial surveys, Nelson Aggregate saved a total of 228 man hours and $28,500 across six quarry sites.