Alpine Loop Geologic Hazards

Metadata:

• Identification_Information
• Data_Quality_Information
• Spatial_Data_Organization_Information
• Spatial_Reference_Information
• Entity_and_Attribute_Information
• Distribution_Information
• Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: Computer Terrain Mapping, Inc.

Publication_Date: 2005

Title: Alpine Loop Geologic Hazards

Geospatial_Data_Presentation_Form: map

Description:

Abstract:

The Alpine Loop Geologic Hazards data set shows the geologic hazards on lands along the Loop. This data set is one of the development constraints used to determine Development Potential.

Hazard data was relatively complete for San Juan County and the portion of San Miguel County that falls in the study area. Hazard mapping from the Colorado Geological Survey covered the area around the Town of Ouray. The only hazard data uncovered for Hinsdale County was the portion of the Slumgullion Slide within the study area.

Purpose:

The Alpine Loop Spatial Analysis and Mapping Project inventoried natural and cultural resources and identified important areas where overlapping resources occur. The results from this project will provide an opportunity for area stakeholders - landowners, outdoor enthusiasts, surrounding communities, federal government agencies and local and national preservation groups - to come together to find solutions that maintain the Alpine Loop experience for future visitors and residents, while working within the framework of landowner objectives as well as local and federal government goals.

The Alpine Loop Spatial Analysis and Mapping Project analyzed the Alpine Loop landscape, considering important natural and cultural resources along with the likelihood of development based upon building constraints. The Project aims to provide a planning tool for area stakeholders as they consider the variety of land management options and the future of this magnificent region. The next logical step will be to craft solutions that work within the framework of landowner desires, local and federal government land management goals, and available financial and technical resources to manage the area in a way that preserves the Alpine Loop experience for future generations.

While the Alpine Loop lies within three counties - San Juan, Hinsdale and Ouray - the analytical work extended into a portion of San Miguel County. The resulting mapping and analyses will:

1. Create a spatial foundation to aid future projects in the Alpine Loop corridor;

2. Serve as a prioritization tool for evaluating the conservation potential of individual private parcels;

3. Provide the necessary framework for pursuing future funding opportunities.

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 2003

Ending_Date: 2005

Currentness_Reference:

Data were retrieved from various sources and analyzed between 2003 and 2005. See Data Quality Information for time information for source data.

Status:

Progress: Complete

Maintenance_and_Update_Frequency: None Planned

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -107.8725478

East_Bounding_Coordinate: -107.2256611

North_Bounding_Coordinate: 38.08819806

South_Bounding_Coordinate: 37.73515861

Keywords:

Theme:

Theme_Keyword_Thesaurus: None

Theme_Keyword: Conservation

Theme_Keyword: Development

Theme_Keyword: Geohazard

Place:

Place_Keyword_Thesaurus: None

Place_Keyword: United States

Place_Keyword: North America

Place_Keyword: Colorado

Place_Keyword: San Juan Mountains

Place_Keyword: Ouray County

Place_Keyword: San Juan County

Place_Keyword: Hinsdale County

Place_Keyword: San Miguel County

Place_Keyword: Ouray

Place_Keyword: Silverton

Place_Keyword: Lake City

Access_Constraints: None

Use_Constraints: None.

Point_of_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: Computer Terrain Mapping, Inc.

Contact_Person: Ed Russell

Contact_Position: President

Contact_Address:

Address_Type: mailing

Address: PO Box 4982

City: Boulder

State_or_Province: CO

Postal_Code: 80306

Country: USA

Contact_Voice_Telephone: 303.444.1670

Contact_Facsimile_Telephone: 303.443.4856

Contact_Electronic_Mail_Address: ctm@ctmap.com

Hours_of_Service: 8:00-5:00 MT

Data_Set_Credit:

This data set is the product of a collaborative process between numerous agencies, organizations and interested individuals from the beautiful Alpine Loop region.

Native_Data_Set_Environment:

GRASS version 5 on Red-Hat Linux version 8.0 exported to an ASCII Grid

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report: Determined from a variety of data sources of unknown accuracy.

Logical_Consistency_Report:

Data are calculated from a variety of data sources of unknown accuracy. Only basic spot checking based on knowledge of terrain was performed.

Completeness_Report:

Coverage was nearly complete for San Juan County and San Miguel County. The area around Ouray had geohazard mapping. Only the Slumgullion Slide within Hinsdale County was used.

Lineage:

Source_Information:

Source_Citation:

Citation_Information:

Originator: San Miguel County GIS Department

Publication_Date: 2002

Title: GEOHAZRD

Publication_Information:

Publication_Place: Telluride, Colorado

Publisher: San Miguel County GIS Department

Geospatial_Data_Presentation_Form: map

Other_Citation_Details:

San Miguel County Geohazard including rockfall, landslide, colluvial slopes, and subsidence.

Type_of_Source_Media: digital data

Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 20021125

Source_Currentness_Reference: file date

Source_Citation_Abbreviation: San Miguel County Geohazards

Source_Contribution: Geologic hazards for San Miguel County Colorado.

Source_Information:

Source_Citation:

Citation_Information:

Originator: Candace L. Jochim, Colorado Geological Survey

Publication_Date: 1986

Title:

Debris-Flow Hazard in the Immediate Vicinity of Ouray, Colorado.

Publication_Information:

Publication_Place: Denver, Colorado

Publisher:

Colorado Geological Survey; Department of Natural Resources; State of Colorado

Geospatial_Data_Presentation_Form: map

Other_Citation_Details:

Special Publication 30. Map of geologic hazards near the city of Ouray Colorado. Map indicates areas of very high, high, and moderate-to-low hazard. Base from USGS 7-1/2 minute quadrangle.

Type_of_Source_Media: Paper Map and Book

Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 1986

Source_Currentness_Reference: publication date

Source_Citation_Abbreviation: City of Ouray Geologic

Source_Contribution: Geologic hazards for City of Ouray Colorado.

Source_Information:

Source_Citation:

Citation_Information:

Originator: William A. Gallant

Publication_Date: 1976

Title: Surficial Deposits and Geologic Hazards Map, San Juan County

Publication_Information:

Publication_Place: Golden, Colorado

Publisher: Charles S. Robinson and Associates, Inc.

Geospatial_Data_Presentation_Form: map

Other_Citation_Details: Approved by San Juan County Commissioners.

Type_of_Source_Media: Paper Maps

Source_Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 1975

Ending_Date: 1976

Source_Currentness_Reference: publication date

Source_Citation_Abbreviation: San Juan County Geohazards

Source_Contribution: Geologic hazards for San Juan County

Source_Information:

Source_Citation:

Citation_Information:

Originator: Philip S. Powers

Originator: Marta Chiarle

Publication_Date: 1994

Title:

A Digital Photogrammetric Solution (GIS) to Measure Horizontal Surficial Movements on Slumgullion Landslide, Hinsdale County, Colorado.

Publication_Information:

Publication_Place: Unknown

Publisher: USGS

Geospatial_Data_Presentation_Form: map

Other_Citation_Details: Used resulting digital file.

Type_of_Source_Media: digital

Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 1994

Source_Currentness_Reference: publication date

Source_Citation_Abbreviation: Slumgullion Slide

Source_Contribution: Slumgullion Slide in Hinsdale County

Process_Step:

Process_Description:

Classify TS: Talus Slope as 2 (moderate), CSA: Colluvial Slopes (2) Accelerated as 3 (high), RG: Rock Glacier as 3 (high), RF: Rock Fall as 3 (high), CST: Colluvial Slopes (1) Thick as 2 (moderate), SL: Landslide as 3 (high), PF: Floodplain as 2 (moderate), TSS as 3 (high), DF: Debris Fan as 2 (moderate), CSM: Colluvial Slopes (3) Moderate as 2 (moderate), ES: Expansive Soils as 2 (moderate), CSI: Colluvial Slopes (1) Inactive as 1 (low), SW: Subsidence as 3 (high), TAI: Tailings as 3 (high), and SF as 3 (high).

Source_Used_Citation_Abbreviation: San Miguel County Geologic

Source_Produced_Citation_Abbreviation: San Miguel County Geologic Classified

Process_Date: 2004

Process_Step:

Process_Description:

Classify Very High Hazard as 3 (high), High Hazard as 2 (moderate), Moderate to Low Hazard as 1 (low), Flood as 1 (low), High Hazard and Flood as 3 (high), Moderate to Low Hazard and Flood as 2 (moderate), Fans as 1 (low), Very High Hazard and Fans as 3 (high), High Hazard and Fans as 3 (high), Moderate to Low Hazard and Fans as 2 (moderate).

Source_Used_Citation_Abbreviation: City of Ouray Geologic

Source_Produced_Citation_Abbreviation: City Ouray Geologic Classified

Process_Date: 2004

Process_Step:

Process_Description:

High hazard (3) values were assigned to swamp, bogs and floodplains (mapped as geohazards), rockfall zones, talus slopes, rock glaciers and debris fans. Medium hazard (2) was applied to talus on gentle slopes and stable colluvium or bedrock on steep slopes. Low hazard (1) was assigned to stable gravel terraces and stable thin colluvium or bedrock on gentle or moderate slopes.

Source_Used_Citation_Abbreviation: San Juan County Geohazards

Source_Produced_Citation_Abbreviation: San Juan County Geologic Classified

Process_Date: 2004

Process_Step:

Process_Description: Assign high hazard value to areas within the Slumgullion Slide.

Source_Used_Citation_Abbreviation: Hinsdale County Geohazards

Source_Produced_Citation_Abbreviation: Hinsdale County Geologic Classified

Process_Date: 2004

Process_Step:

Process_Description:

Combine sources in a raster format to create low, medium and high hazard values to be applied as a development constraint.

Source_Used_Citation_Abbreviation: San Miguel County Geologic Classified

Source_Used_Citation_Abbreviation: City of Ouray Geologic Classified

Source_Used_Citation_Abbreviation: San Juan County Geologic Classified

Source_Used_Citation_Abbreviation: Hinsdale County Geologic Classified

Process_Date: 2004

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Raster

Raster_Object_Information:

Raster_Object_Type: Grid Cell

Row_Count: 1256

Column_Count: 1863

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Planar:

Grid_Coordinate_System:

Grid_Coordinate_System_Name: Universal Transverse Mercator

Universal_Transverse_Mercator:

UTM_Zone_Number: 13

Transverse_Mercator:

Scale_Factor_at_Central_Meridian: .9996

Longitude_of_Central_Meridian: -105 00 00

Latitude_of_Projection_Origin: 00 00 00

False_Easting: 500000

False_Northing: 0

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: coordinate pair

Coordinate_Representation:

Abscissa_Resolution: 30.0

Ordinate_Resolution: 30.0

Planar_Distance_Units: METERS

Geodetic_Model:

Horizontal_Datum_Name: North American Datum of 1983 (NAD83)

Ellipsoid_Name: GRS 1980

Semi-major_Axis: 6378137

Denominator_of_Flattening_Ratio: 298.257222101

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: Geohazard grid cell

Entity_Type_Definition: Any of the data elements in the geohazard map

Entity_Type_Definition_Source: author

Attribute:

Attribute_Label: geohazard cell value

Attribute_Definition:

Values of 3 (high hazard), 2 (medium hazard), 1 (low hazard), and 0 (no hazard)

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 0

Range_Domain_Maximum: 3

Attribute_Definition_Source: author

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: Computer Terrain Mapping, Inc.

Contact_Person: Ed Russell

Contact_Position: President

Contact_Address:

Address_Type: mailing

Address: PO Box 4982

City: Boulder

State_or_Province: CO

Postal_Code: 80306

Country: USA

Contact_Voice_Telephone: 303.444.1670

Contact_Facsimile_Telephone: 303.443.4856

Contact_Electronic_Mail_Address: ctm@ctmap.com

Resource_Description: Alpine Loop Spatial Analysis and Mapping Project

Distribution_Liability:

Computer Terrain Mapping, Inc. (CTM) provides this data set as is. CTM makes no guarantee or warranty concerning the accuracy of information contained in the data. CTM further makes no warranties, either expressed or implied as to any other matter whatsoever, including, without limitation, the condition of the product, or its fitness for any particular purpose. The burden for determining fitness for use lies entirely with the user. Although this data has been processed successfully on computers at CTM, no warranty, expressed or implied, is made by the CTM regarding the use of this data on any other system, nor does the fact of distribution constitute or imply any such warranty.

Custom_Order_Process: Contact distributor to receive additional copies.

Metadata_Reference_Information:

Metadata_Date: 200504

Metadata_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: Computer Terrain Mapping, Inc.

Contact_Person: Ed Russell

Contact_Position: President

Contact_Address:

Address_Type: mailing

Address: PO Box 4982

City: Boulder

State_or_Province: CO

Postal_Code: 80306

Country: USA

Contact_Voice_Telephone: 303.444.1670

Contact_Facsimile_Telephone: 303.443.4856

Contact_Electronic_Mail_Address: ctm@ctmap.com

Hours_of_Service: 8:00-5:00 MT

Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998