Geologic Hazards

By: D. P. Neuffer and R. L. Bruhn We produced a comprehensive, detailed landslide map of Timber Lakes Estates in Wasatch County, Utah. Landslide deposits underlie about 13% of the total area of Timber Lakes (about 3,200 acres). We mapped twenty separate landslides scattered...

By: R. E. Giraud The Utah Geological Survey (UGS) developed these guidelines to help geologists evaluate debris-flow hazards on alluvial fans to ensure safe development. Debris-flow hazard evaluations are particularly important because alluvial fans are the primary sites of debris-flow deposition and are also...

By: W. R. Lund, editor This Proceedings Volume documents the results of the second Basin and Range Province Seismic Hazards Summit held in Reno-Sparks, Nevada on May 16-19, 2004. Included are abstracts of the 26 oral presentations made at the summit, which were grouped...

By: R. L. Bon, R. F. Riordan, B. T. Tripp, and S. T. Krukowski, editorsThis publication includes 23 papers from the 35th Forum on the Geology of Industrial Minerals ? The Intermountain West Forum. These papers include:1.) Tidewater deposits of high-brightness calcium carbonate and...

By: G. N. McDonald and R. E. GiraudContains a 1:24,000 scale landslide inventory map and geodatabase for Twelvemile Canyon, east of Mayfield, Utah. The map covers 59 square miles on the west side of the Wasatch Plateau. The purpose of the map and database...

By: A. H. Elliot and K. M. Harty Significant economic losses are associated with landslides, and Utah has numerous landslides and landslide-prone geologic units. Exposure to landslide hazards increases as development expands onto hillsides and other landslide-prone areas. To improve the understanding of landslides...

By: R. E. Giraud and L. M. Shaw This DVD contains a 1:500,000 scale landslide susceptibility map in PDF that shows the generalized landslide hazard in Utah. Landslide susceptibility categories are based on mapped landslides and slope-angle thresholds for different geologic map units. A...

By: K. M. Harty Landslides are the most commonly occurring geologic hazards in Utah and have caused damage in both rural and urban areas of the state. Nearly 10,000 previously mapped landslides have been compiled onto the 1:500,000-scale base map of Utah. The map...

By: K. M. Harty and G. E. Christenson Parts of Utah are subject to lake-flooding hazards from large fluctuations of lake shorelines and intermittent flooding of dry lakes, mud/salt flats, and marshes. The greatest potential for damage from lake flooding is along the Wasatch...

By: S. Hecker and K. M. Harty, compilers Many population centers in the state are in areas susceptible to shallow ground-water problems. Rising water tables in recent years have caused flooding in basements, storage tanks, underground utilities, waste dumps, and septic-tank soil-absorption fields. Such...

By: M. D. Hylland, editor The following guidelines were developed by the Utah Geological Survey (UGS) to assist geologists and geotechnical engineers in performing landslide-hazard studies and to help technical reviewers critically evaluate the conclusions and recommendations in hazard-evaluation reports. The guidelines address evaluating...

By: G. E. Christenson and L. M. Shaw This publication compiles a Geographic Information System (GIS) database showing areas where special studies are recommended to address surface-fault-rupture, liquefaction, landslide, and debris-flow/alluvial-fan-flooding hazards prior to development. The database was compiled from existing geologic-hazard special-study-area maps...

By: G. E. Christenson and F. X. Ashland, compilers Statewide losses from landslides in 2005 and 2006 likely exceeded $10 million and brought much public and media attention to the risks and challenges of building on hillsides in Utah. Utah has a long history...

By: W. R. Lund This report presents the results of the Utah Quaternary Fault Parameters Working Group (hereafter referred to as the Working Group) review and evaluation of Utah’s Quaternary fault paleoseismic-trenching data. The purpose of the review was to (1) critically evaluate the...