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New report: geologic hazards in Zion National Park area

sltrib.com

If the thought of a 2,700-ton boulder rolling through your house concerns you, the Utah Geological Survey has a new report you might want to read, particularly if you are considering moving to a community along State Road 9 in Washington County.

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Significant Hazards on State Route 9 Near Zion National Park
kcsg.com

There are significant geologic hazards present along State Route 9, between La Verkin and Springdale in Washington County, according to the Utah Geological Survey (UGS). Geologists recently released a comprehensive report addressing the numerous geologic hazards that threaten the growing communities of La Verkin, Virgin, Rockville, and Springdale. All of the communities are on State Route 9 which is the main transportation corridor for more than 2.5 million annual visitors to Zion National Park. “Recent damaging and fatal rock falls in Rockville, landslides in Springdale, and floods along the Virgin River demonstrate that many of the geologic processes that have shaped this area’s outstanding scenery also make this area prone to geologic hazards,’ says Tyler Knudsen, UGS geologist.

Police Chief: Looting At Home Destroyed By Rockfall

www.kutv.com

Five days after a rockslide killed two people inside their home, state geologists Tuesday returned to Rockville and warned the mayor and police chief that more rocks will fall.

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What causes rock slides like the one in Rockville?

www.4utah.com

The rock slide in Rockville, Utah that killed two people has many wondering how did it happen and could it happen again.

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Expert: More rock slides likely

www.thespectrum.com

Utah Geological Survey experts said it is unclear when another rock slide could take place at the Rockville Bench Mesa in Rockville, but as the freeze-thaw season continues, residents may be at a larger risk than normal.

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Geologists begin studying trigger factors for Rockville slide

www.ksl.com

Geologists with the Utah Geological Survey were quick on the scene of Thursday’s rock slide in Rockville that left two people dead.

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Crews recover bodies from scene of fatal rock slide

www.ksl.com

The bodies of two people killed when a massive boulder smashed into their home Thursday afternoon have been recovered.

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In Goblin Valley, chances of getting hurt by a falling rock are slim

The hypothetical family that a group of Highland men allegedly was trying to protect when they destroyed a rock structure was more likely to die on the drive to Goblin Valley State Park than to be crushed by a falling rock.

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Survey Notes volume 45 number 3

Current Issue Contents:

  • Damaging Debris Flows Prompt Landslide Inventory Mapping for the 2012 Seely Fire, Carbon and Emery Counties, Utah
  • Rock Fall: An Increasing Hazard in Urbanizing Southwestern Utah
  • New Geologic Data Resources for Utah
  • Energy News
  • Teacher’s Corner
  • Glad You Asked: Where is the Coolest Spot in Utah?
  • GeoSights: The Goosenecks of the San Juan River, San Juan County, Utah
  • Survey News
  • New Publications

    GET IT HERE
    PAST ISSUES

ROCKVILLE ROCK FALL TECHNICAL REPORT

The rock, estimated to be about 21 x 17 x 17 feet and weighing about 450 tons, slid and fell from the upper slope of Rockville Bench, began to roll downslope, collided with a large stationary boulder at the base of the slope, and shattered into numerous smaller fragments that damaged several outbuildings, two cars, and a house. Although people were home at the time, no one was injured.

The rock fall occurred shortly after a protracted storm event on February 5-9, 2010 that produced 1.38 inches of rain at the Zion Canyon RAWS station, 4.5 miles northeast of Rockville.

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Related Links

Technical Report (pdf)
Landslides: Events & Information
Rock-Fall Hazards (pdf)

A CLOSE CALL IN ROCKVILLE

The Utah Geological Survey (UGS) was notified of a large rock fall in Rockville, Utah Wednesday morning that damaged several buildings.  Geologists say it could have been much worse and are worried about the possibility of second boulder breaking loose.

Around 7:30 a.m., a boulder estimated to be 35-feet by 30-feet by 30-feet broke loose and rolled down a hill toward the home that Tamara Burton was renting.

Tyler Knudsen and Bob Blackett, UGS geologists, were asked by Rockville Mayor Alan Brown to investigate what happened.  According to air photos, the boulder had been there for at least four years after detaching from a ledge and sliding about 20 feet and coming to a rest on a 45-degree slope above Burton’s home.

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IN THE MEDIA

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