Work accident at 25 South Riverside Avenue condominium project.

The site of "The Hudson," where 34 condos are still under construction.

The injured worker is carried by stretcher into a Croton EMS ambulance/ Photos by Michael Balter

Shortly after 8 am this morning, a workman at the 25 South Riverside Avenue site fell from a first floor landing when a protective guard rail broke, according to witnesses and the site supervisor.

Croton’s first responders, joined shortly afterwards by an ambu…