GEOLOGIC HAZARDS

Springhill Landslide, North Salt Lake

The Utah Geological Survey (UGS) has been monitoring conditions at the Springhill landslide in North Salt Lake, Davis County since 1998.

These web pages are intended to provide relatively frequent updates on landslide conditions, including movement amounts, changes in the rate of movement, ground-water levels that affect stability, and UGS activities.

The data presented here are provisional and subject to review and revision.

Background/Location Map

Map of the landslide boundary (as of November, 2009) showing location of wells (yellow dots and text) and stake stations (red dots and text).

In the late 1990s, residents in the Springhill area of North Salt Lake, Davis County began noticing cracking and other distress related to relatively minor movement of the landslide. By 1998, a house at 160 Springhill Drive that straddled the northern boundary of the landslide was severely damaged and condemned. Relatively severe distress also occurred to several houses along Valley View Drive (formerly 350 E) and Springhill Circle.

Little movement or damage occurred during a dry period between 1999 and 2004, but the rate of movement accelerated during the 2005 wet year. Since 2005, the amount of movement each year has increased, except in 2007 and 2011-2012 (dry years), resulting in an increased amount of damage and distress, particularly to houses in the upper and lower parts of the landslide and to Springhill Drive.

Landslide Description

The Springhill landslide is about 720 feet long and about 290 feet wide where it is crossed by Springhill Drive. The local relief (change in elevation) is about 150 feet and the average slope of the landslide is approximately 21 percent (the ground rises 21 feet over a distance of 100 feet).

The depth of the landslide varies along its length. Along the north edge of Springhill Circle, the landslide is about 48 feet deep and likely deeper than 70 feet beneath Springhill Drive. The landslide is shallower along its southern edge, and in the head and toe.

City of North Salt Lake Awarded Federal Grant

On June 28, 2012, the City of North Salt Lake announced that they had been awarded an almost $2 million matching fund Federal Emergency Management Agency Pre-Disaster Mitigation Grant to buy and demolish 11 homes and turn the landslide site into an open-space park. The grant requires a local match of about $600,000. The city plans to apply for other grants, hold fundraisers, and use park funds to get the matching money.

UGS Activity through July 6, 2012

2012

July 6, 2012: Measured groundwater levels and ground deformation.

April 30, 2012: Measured groundwater levels and ground deformation.

April 4, 2012: Measured groundwater levels and ground deformation. Measured landslide movement using a survey-grade GNSS instrument.

February 29, 2012: Measured groundwater levels and ground deformation.

January 4, 2012: Measured groundwater levels and ground deformation.

January 4, 2012: Measured landslide movement using a survey-grade GNSS instrument.

2011

November 30, 2011: Measured groundwater levels and ground deformation.

September 28, 2011: Measured landslide movement using a survey-grade GNSS instrument.

August 22, 2011: Measured groundwater levels and ground deformation.

August 1, 2011: Measured landslide movement using a survey-grade GNSS instrument.

July 14, 2011: Measured groundwater levels.

July 6, 2011: Measured ground deformation at toe and head scarp using stakes and landslide movement using a survey-grade GNSS instrument.

June 2, 2011: Measured ground deformation at toe and head scarp using stakes and landslide movement using a survey-grade GPS instrument.

May 24, 2011: Measured groundwater levels.

May 5, 2011: Measured landslide movement using a survey-grade GPS instrument.

May 3, 2011: Geologic mapping of the Springhill landslide.

April 26, 2011: Measured landslide movement using a survey-grade GPS instrument.

April 21, 2011: Measured groundwater levels and ground deformation.

March 21, 2011: Measured landslide movement using a survey-grade GPS instrument and measured groundwater levels and ground deformation.

February 22, 2011: Measured groundwater levels and ground deformation.

January 24, 2011: Measured landslide movement using a survey-grade GPS instrument.

January 20, 2011: Measured groundwater levels and ground deformation.

2010

December 7, 2010: Measured groundwater levels and ground deformation.

October 20, 2010: Measured landslide movement using a survey-grade GPS instrument and measured groundwater levels and ground deformation.

September 21, 2010: Measured groundwater levels and ground deformation.

August 23, 2010: Measured groundwater levels and ground deformation.

June 29, 2010: Measured landslide movement using a survey-grade GPS instrument and measured groundwater levels and ground deformation.

June 21, 2010: Measured groundwater levels and ground deformation.

May 13, 2010: Measured groundwater levels and ground deformation.

April 13, 2010: Measured groundwater levels and ground deformation.

February 23, 2010: Measured groundwater levels and ground deformation.

January 20, 2010: Measured groundwater levels and ground deformation.

2009

December 15, 2009: Measured groundwater levels and ground deformation.

November 5, 2009: Measured landslide movement using a survey-grade GPS instrument and measured groundwater levels and ground deformation.

October 1, 2009: Measured landslide movement using a survey-grade GPS instrument and measured groundwater levels.

September 24, 2009: Measured groundwater levels and ground deformation.

September 4, 2009: Presentation to residents and city council on landslide conditions.

August 13, 2009: Measured groundwater levels and ground deformation.

July 27, 2009: Measured landslide movement using a survey-grade GPS instrument and measured groundwater levels.

July 9, 2009: Measured groundwater levels and ground deformation.

June 29, 2009: Measured groundwater levels.

June 18, 2009: Measured landslide movement using a survey-grade GPS instrument and ground deformation.

April 23, 2009: Measured groundwater levels and ground deformation.

April 15, 2009: Measured groundwater levels and ground deformation.

April 8, 2009: Measured groundwater levels.

April 7, 2009: Measured ground deformation.

April 6, 2009: Measured landslide movement using a survey-grade GPS instrument.

March 24, 2009: Measured groundwater levels and ground deformation.

March 11, 2009: Measured groundwater levels and ground deformation.

February 26, 2009: Measured landslide movement using a survey-grade GPS instrument.

February 24 & 25, 2009: Measured groundwater levels and ground deformation.

February 19, 2009: Posted webpage on landslide conditions.

February 11, 2009: Measured groundwater levels and ground deformation.

January 27, 2009: Measured groundwater levels and ground deformation.

January 20, 2009: Presentation to city staff and utility company representatives on landslide conditions. Site field trip with city council.

January 17, 2009: Presentation to residents and city council on landslide conditions.

January 14, 2009: Initiated landslide movement monitoring using a survey-grade Global Positioning System (GPS) instrument.

Contact Information

Contact either Rich Giraud, 801-537-3351, email: richardgiraud@utah.gov or Gregg Beukelman, 801-537-3380, email: greggbeukelman@utah.gov.

UGS Technical Reports

Ashland, F.X., and Elliott, A.H., 2009, Update on conditions through 2008 at the Springhill landslide, North Salt Lake, Utah: Utah Geological Survey Technical Report 09-01, 19 p.

Ashland, F.X., 2003, Characteristics, causes, and implications of the 1998 Wasatch Front landslides: Utah Geological Survey Special Study 105, 49 p. see pages 20-24 for information on the Springhill landslide.

Giraud, R.E., 1999, Reconnaissance of building distress and ground movement in the Springhill Circle area, North Salt Lake, Davis County, Utah, in McDonald, G.N., compiler, Technical reports for 1998, Applied Geology Program: Utah Geological Survey Report of Investigation 242, p. 60-75.