Oregon Outdoor Mass Gatherings — ORS 433.735–433.770 and OAR 333-039-0040 (Emergency Medical Facilities)[1]
Summary
Oregon pairs a dedicated outdoor mass gathering statute with a health-authority rule division containing explicit clinician ratios. An "outdoor mass gathering" is an actual or reasonably anticipated assembly of more than 3,000 persons continuing, or reasonably expected to continue, more than 24 consecutive hours but less than 120 hours within any three-month period, held primarily in open spaces rather than a permanent structure; holding one without a county permit is prohibited. OAR 333-039-0040 requires "one Oregon physician plus sufficient other physicians ... to provide a ratio of one for each 10,000 persons ... and one nurse for each 7,500 persons" during daylight, relaxing to one physician per 20,000 and one nurse per 15,000 between 1 a.m. and 7 a.m.; one ambulance for each 10,000 persons anticipated or fraction thereof; and one cot or bed per 1,000 persons anticipated. Care must be delivered in enclosed, weather-protected space with examining tables, locked medication storage, minor-surgery supplies and 200 foot-candles of lighting.
So what
An Oregon camping-style festival above 3,000 anticipated attendees cannot obtain its county permit until identified Oregon-licensed physicians, nurses and ambulances are contracted at fixed ratios — staffing is a permit precondition, not a planning judgment. The night-time relaxation (1/20,000 physicians, 1/15,000 nurses between 0100 and 0700) is the only flex in the table, so build the roster around the daylight numbers. Remember the cot count (1 per 1,000 anticipated) and the lighting and locked-drug-storage specifications: they size the treatment structure itself.