COLUMBIA, Pa. — The lights on the bridge carrying Route 462 across the Susquehanna River between Lancaster and York counties will be turned off Friday night and will remain off until further notice in an effort to avoid attracting swarms of newly hatched mayflies, Columbia Borough Police said Friday.
The art deco-style lights on the bridge connecting Lancaster and York Counties have attracted thousands of mayflies and impacted visibility in the past.
In 2015, a major swarm caused several accidents and resulted in millions of dead mayflies piling up along the sidewalk of the bridge…