The dataset includes several measurements collected for two complementary phases of a Sandberg bluegrass restoration project. In the first phase of the project, percentage of vegetation and soil surface cover (e.g. soil, rock) were measured within each of 20 treatment plots (described in the following section) using the Line Point Intercept (LPI) method (Herrick et al. 2005) from 2019-2021. Sandberg bluegrass density was also measured by counting individual plants within 0.5 x 0.5 meter quadrats systematically placed along the transects. Herbaceous biomass was destructively harvested within 0.5 x 0.5 m quadrats that were also systematically placed (at different meter marks than density quadrats) along the transects. Biomass was oven dried and weighed in the USGS Snake River Field Station Laboratory in Boise, Idaho. In Phase II of the project, we sampled cover, density, and biomass characteristics using the same techniques described for Phase I. Phase II had different treatments, with 42 total plots that were sampled 2021-2022.