Federal OSHA requires certain establishments to electronically report their OSHA injury log by March 2, 2019. Institutions with 250 employees or more at a single location are automatically required to electronically report their 2018 OSHA forms 300, 300A and 301. OSHA states your employee count includes peak employment during the calendar year and should include every individual that worked for you regardless if full-time, part-time, temporary or seasonal.
In addition, Public Gardens are assigned to NAICS (North American Industry Classification System) code 712110 which includes museums, historical sites and similar institutions. The 712110 classification requires electronic reporting of your OSHA log 300A if you have between 20 and 249 employees.