The dissolving salt beds cause surface subsidence, which leads
to costly repairs. Research by first-year geology graduate student
A.J. Herrs could provide answers that could save taxpayer dollars.
Herrs, who was raised on a farm in Clay Center, said the highway
has been repaved several times in the past decade because of two
major sinkholes. To plot the sinkholes precisely, Herrs is using
state-of-the-art technology called LiDAR, for Light Detection and
He says that learning the rate of subsidence would help highway
officials plan resurfacing projects or new roads.