Gyro Park Road was closed for a couple days last week due to loose rock that had to be removed from the cliff face.
City crews noticed early Friday morning some fallen rocks caught by the mini barriers along the side of the road next to the Gyro Park bluffs.
“The rocks were kept from falling onto the road by the wire mesh we installed last year,” City of Nelson operations manager Jim Dinwoodie explained.
The rocks tumbled out the bottom of the mesh and were stopped by the barriers.
“Everything worked the way it was intend to and kept the rocks off the road,” Dinwoodie added.
Still, the road was closed as a precaution and a geotechnical specialist was brought to evaluate the stability of the bluffs. It was determined that more rocks were likely to fall.
On Saturday, rock scalers were brought in to pry off the loose rocks, which were then hauled away by city crews. The road reopened that evening.
Dinwoodie said the Gyro bluffs are inspected every spring and fall. They were considered stable at last check. He blames recent heavy rains for the change.
“Water seeps into the cracks [between the rocks] and pushes them open,” he explained. “The rock is quite brittle and crumbles easily. We know when rock starts to fall there’s often more to follow.”
After the scaling work was complete, the bluffs were once again inspected and are considered stable.