CASE STUDY Wyoming: Landslide Warning Recent loss of life from large landslides in the United States (such as those in Oso, Washington; and Salt Creek, Colorado) has increased the awareness of landslide hazard to public-land managers in the West. About 20 years ago, a large landslide occurred adjacent to Cook Lake in the Bear Lodge Mountains in northeastern Wyoming. Recently, RESPEC (an engineering consulting group) was contracted by the United States Forest Service (USFS) to design an early-warning system to protect recreational users and a downstream community from potential disaster in that part of Wyoming. In 1997, after several years of record rainfall, a large, 27-acre rota- tional landslide occurred at night in mudstone strata of the Jurassic Sundance and Redwater formatio

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