ArcGIS REST Services Directory Login | Get Token
Home > services > Hazards > Hazards_Viewer (MapServer) > USFS CGS AML Inventory Mine Openings Help | API Reference
JSON

Layer: USFS CGS AML Inventory Mine Openings (ID: 28)

Parent Layer: USFS Abandoned Mines

Name: USFS CGS AML Inventory Mine Openings

Display Field: SITENAME_1

Type: Feature Layer

Geometry Type: esriGeometryPoint

Description: The CGS completed a field inventory of abandoned and inactive hardrock mines on USFS lands in the State between 1991 and 1999. Approximately 18,000 abandoned mine-related features were inventoried. The USFS inventory process began with an office review of existing mining and geologic literature, previous mine inventories, and current/historical maps. Mine locations from these sources were compiled onto a work map. Aerial photographs (1:24,000-scale) were examined to locate potential mine sites not identified by other sources. Water quality information was used to identify streams potentially affected by acid mine drainage or other mine-site contaminants. When the office research process was complete, geologists visited specific mine locations (Sares et. al., 2000). Additional mines not identified in the literature search were found while performing the field inventory work. Investigated mines were grouped geographically into “inventory areas” that were given identification numbers based on the Universal Transverse Mercator (UTM) coordinate system. An inventory area usually contained one to twenty mine features that could be grouped in relation to geographic features, such as a gulch or hillside. Mine features inventoried included adits, shafts, prospect pits, high walls, quarries, waste rock dumps, tailings, and spoils. All mine features within an inventory area were numbered sequentially (Sares et. al. 2000). Mine locations and data collected by the field geologists were entered on field forms and, subsequently, into a computer database and ArcGIS. Latitude/longitude information for each mine feature and water test were obtained by transferring mine location information from the field maps to Mylar overlays. Mine locations were then digitized from the overlays into ArcGIS (Sares et. al., 2000). Reportedly, some of the locations were also collected using a handheld GPS. Water quality data, such as pH and conductivity, were collected at all features where water was present, such as draining adits, seepage at the toe of dumps/tailings, and standing water in shafts. Water samples were collected where field tests indicated low pH and/or high conductivity, including several areas with natural acid rock drainage. Samples were analyzed for dissolved/total metals and for selected anions. The quality of any water associated with a mine feature was also assessed in the field by determining the pH, specific conductance, and physical observations. Observable characteristics were documented including precipitates and salts in the effluent drainage, opaque or cloudy water, stressed vegetation, and absence of aquatic organisms. This information was used to assign a qualitative “Environmental Degradation Rating” to the individual mine feature. Physical mine hazards were also rated in the field (Sares et. al., 2000). The CGS USFS database is in ArcGIS and Microsoft Access. Additional data, metadata, and database dictionary is included on CGS’s website (CGS, 2017). The data presented here are not intended to be used as a tool to assess risk. ANY DATA OR INFORMATION PROVIDED HERE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND, WHETHER EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. Data or information provided here shall be used and replied upon only at the user's sole risk, and the user agrees to indemnify and hold harmless the entities who provided the data and any other parties, its officials, officers and employees from any liability arising out of the user of the data/information provided. No warranty expressed or implied is made regarding the display or utility of the data, or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. The agencies who provided these data and the Colorado Geological Survey shall not be held liable for improper or incorrect use of the data described and/or contained herein.

Copyright Text: http://coloradogeologicalsurvey.org/water/abandoned-mine-land/united-states-forest-hazard-abandoned-mine-land-inventory-project/

Default Visibility: true

MaxRecordCount: 1000

Supported Query Formats: JSON, geoJSON, PBF

Min Scale: 0

Max Scale: 12000

Supports Advanced Queries: false

Supports Statistics: false

Has Labels: false

Can Modify Layer: false

Can Scale Symbols: false

Use Standardized Queries: true

Supports Datum Transformation: true

Extent:
Drawing Info: Advanced Query Capabilities:
HasZ: false

HasM: false

Has Attachments: false

HTML Popup Type: esriServerHTMLPopupTypeAsHTMLText

Type ID Field: null

Fields:
Supported Operations:   Query   Query Attachments   Query Analytic   Generate Renderer   Return Updates

  Iteminfo   Thumbnail   Metadata