Evidence suggests hellbenders (Cryptobranchus alleganiensis) are undergoing population declines throughout large portions of their range. More complete data are needed for determining the extent and cause(s) of population declines and extirpations. Integrating newer survey techniques and freely available data with traditional field work may allow for comprehensive, efficient, effective, and rapid assessment of population decline. The resulting data can be used to create more holistic models for assessing variables that may cause or serve as predictors of population declines and extirpations.