My WebLink
|
Help
|
About
|
Sign Out
Home
Browse
Search
FLOOD06042
CWCB
>
Floodplain Documents
>
Backfile
>
5001-6000
>
FLOOD06042
Metadata
Thumbnails
Annotations
Entry Properties
Last modified
1/25/2010 7:07:41 PM
Creation date
10/5/2006 1:57:23 AM
Metadata
Fields
Template:
Floodplain Documents
County
Denver
Community
All
Stream Name
All
Basin
South Platte
Title
Colorado Landslide Hazard Mitigation Plan
Date
1/1/1988
Prepared For
State of Colorado
Prepared By
CGS
Floodplain - Doc Type
Educational/Technical/Reference Information
There are no annotations on this page.
Document management portal powered by Laserfiche WebLink 9 © 1998-2015
Laserfiche.
All rights reserved.
/
149
PDF
Print
Pages to print
Enter page numbers and/or page ranges separated by commas. For example, 1,3,5-12.
After downloading, print the document using a PDF reader (e.g. Adobe Reader).
Show annotations
View images
View plain text
<br />EXECUTIVE SUMMARY <br /> <br />Chapter 1 <br />INTRODUCTION <br /> <br />In Colorado, losses from Iandsliding have been in the <br />millions of doDars in recent years. In terms of lives. pro- <br />perty, and damage to the state's infrastructure, these <br />losses are high enough to significantly impact the state's <br />economy over the short term, If present loss trends <br />continue, expected losses could eventually become high <br />enough to disrupt the state's economic well-being and <br />the quality of life of its citizens, It is estimated that, in a <br />worst case situation, losses from a major landslide event <br />at Dowds Junction could run as high as $1,7 billion, As <br />urbanization and development increase in the moun- <br />tainous areas of the state. the potential for higher losses <br />also increases. <br />Of the thousands of landslides in Colorado, at least 49 <br />have been identified as having potential for communit}' <br />impact. Of these. 12 have a very high potential for inflic- <br />ting serious loss. In addition, the interaction of other <br />geologic hazards. such as seismicit}' and flooding, <br />together with Iandsliding increases the overall threat to <br />people. community services, and facilities. <br />The purpose of this plan is to reduce statewide actual <br />and potential landslide losses by: <br />· identifying local governmental resources, plans, <br />and programs that can assist in loss reduction, <br />. identifying unmet local needs that must be ad- <br />dressed to reduce losses, <br />· identifying and developing state agency capabilities <br />and initiatives that can deal with unmet local <br />needs, <br />. developing cost-effective mitigation projects that <br />may reasonably be expected to reduce landslide <br />losses, <br />. educating state and local officials and emergency <br />response personnel on the landslide hazard, and <br />potential methods for loss reduction, and <br />. establishing means to provide a long-term. con- <br />tinuing governmental process to reduce losses. <br />Although landslide loss-reduction is primarily a local <br />responsibility, the magnitude of costs may be so great <br />that significant state support is required. <br />This plan is designed to promote the coordination of <br />loss-reduction efforts by the state and local <br />governments, <br /> <br />Chapter 2 <br /> <br />THE LANDSLIDE HAZARD <br /> <br />Loca1 officials and emetgency response personnel need <br />to be informed about landslide processes in order to be <br />able to effectively develop and implement landslide <br />hazard mitigation plans and formulate disaster <br />responses. The term "landslide" describes a variet}' of <br />processes that resuh in the downward and outward <br />movement of slope-forming materials. Movement occurs <br />by falling, toppling. sliding. spreading, or flowing. <br />Although primarily associated with mountainous regions, <br />landslides can also occur in areas of generally low relief. <br />The various types of landslides can be differentiated by <br />the kinds of material involved and the modes of <br />movement. <br />Both natural and man-induced changes in the environ- <br />ment can trigger landslides, Human activities affecting <br />landslides are mainly associated with construction and <br />involve changes in slope and in the surface and ground- <br />water regimes. Natural factors that can trigger land- <br />sliding include climate changes, weathering processes, <br />and earthquakes. <br /> <br /> <br />Chapter 3 <br />VULNERABILITY AND IMPACT <br /> <br />The impacts of Iandsliding range from the inconvenience <br />of debris cleanup to the life-threatening failure of a <br />landslide-formed dam. The simultaneous or sequential <br />occurrence of other geologic hazards such as flooding or <br />earthquakes with Iandsliding may produce effects that <br />are different or much greater than those produced by <br />Iandsliding alone. <br /> <br />Chapter 4 <br />EVALUATING AND <br />COMMUNICATING THE HAZARD <br /> <br />The first step in landslide hazard reduction is the <br />recognition of the presence of. or the potential for. slope <br />movement and the type and causes of movement. <br />Trained professionals can use various methods including <br />map analysis, aerial photograpby, field reconn.i'sance. <br />drilling, and instrumentation to detect and monitor land- <br />slide movement. <br /> <br />1 <br /> <br />
The URL can be used to link to this page
Your browser does not support the video tag.