Technical Report


Public Deposited

Downloadable Content

Download PDF


Attribute NameValues
  • exceptional examples of the Nation’s biological and geological features. To qualify for NNL designation, a site must be one of the best examples of a geological or biological feature within a biophysiographic province. Zumwalt Prairie represents a perfect example of this concept, containing one of the largest remnants of native bunchgrass prairie in North America. The site includes deep-soiled bunchgrass prairie, buttes with aspen and Ponderosa pine, hawthorn shrublands, and a network of vernal pools, scablands and mounded prairie, all sitting along the edge of Hells Canyon. It supports huge herds of elk, the only remaining population of sharp-tailed grouse in Oregon, is part of the range of the only established wolf pack in the state, and is in exceptional ecological condition. The initial report recommended the site as the best remaining example of Palouse grasslands, based on an initial theme study, in which four grassland themes were identified: Lowland and Valley Grasslands, Palouse and Plateau Grasslands, Canyon Grasslands and Montane Grasslands.After considerable research, collaboration with subject matter experts, and site visits, we conclude that the Zumwalt PNNL still contains the requisite biological and geologic features necessary to support listing as a National Natural Landmark.
Rights Statement