To show the current fire frequencies of CWHR vegetation types in relation to their pre-European historic fire regimes. Fire suppression and other management practices have been altering natural fire regimes for nearly a century, which in turn has changed vegetation structure and habitat quality, and in some cases has reduced biodiversity. The USDA USFS Fire Return Interval Departure analysis (FRID), based on vegetation type, can be used as a common metric for measuring the extent to which current fire regimes have departed from pre-Euro-American fire regimes.