Layers:

Layer: Mills (0)

Name: Mills

Display Field: mill_name

Type: Feature Layer

Geometry Type: esriGeometryPoint

Description: This feature class depicts Comstock-era mill locations within the Carson River Mercury Site (CRMS). These locations were obtained in order to define the investigation area boundaries of Operable Unit 1 (OU1) within CRMS. Completion of this dataset took place over several years and phases, as described below. EPA surveyThe first mill survey took place in 1993 by EPA, contracted by Piedmont Engineering.113 mills were identified in this survey. Later, Nevada Division of Environmental Protection (NDEP) conducted historic research on Comstock-era mills to expand upon this dataset, identifying an additional 87 mill sites, bringing the total number of mills in the dataset to 200. This process is described below.NDEP Historical ResearchMill site locations were determined based on georeferenced maps procured from the EPA, NDEP, Storey County and the UNR digital map library. All maps were georeferenced based on available landmarks by heads-up digitizing techniques. The maps utilized had varying degrees of accuracy based on their date of production. Some maps utilized dated back to the 1860's.Once all historic maps were scanned, imported and georeferenced, all map sources were evaluated and mill site locations were digitized based on the preponderance of evidence (by comparing mill locations as shown on the various source maps) to determine each mill's location.A vector layer of mill sites was thus constructed using georeferenced raster layer resources. This layer of mill sites contains the locations of 188 historic Comstock Era mills as well as 12 additional tailings locations that are not directly associated with a mill site. 33 additional sites were identified; these consisted of sites that were known to exist but not located on historic maps, as well as cyanide mills. Broadbent and Associates, Inc. field surveysIn 2012 NDEP contracted Broadbent and Associates, Inc. to survey all mill sites defined in this dataset. The contractor successfully verified the remains and evidence of 73 mills. Inconclusive mill evidence was found for 98 of the sites in the dataset. For 65 mill sites, the contractor was not given permission by the landowner to access the property and therefore the mill site location was not surveyed. Survey status is unknown for 1 mill. The contractor provided a feature class of all 236 mills accompanied by a detailed report on their survey efforts, listed below:Broadbent and Associates, Inc., Eric M. Seitz, Project Manager. January 31, 2013, Final Report – Comstock Archaeological Mill Site Inventory, Unpublished. NDEP reviewed this report and the associated feature class to confirm each mill point location and provide attribute information on the survey status of each mill site. NDEP added the attrtibute field "Field Verified" to provide information on the field verification status of each site. A value of "No" indicates the site was not surveyed in the field. This was due to to access limitations and denials for sites located on private property. A value of "Yes" indicates the site was surveyed and evidence of the mill was found. A value of "Surveyed" indicates the site was surveyed but inconclusive or little evidence of a mill was found.

Service Item Id: 7c93dbb615f340c88045a975363e6da4

Copyright Text: NDEP Bureau of Corrective Actions; EPA Region 9

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• mill_id ( modelName: mill_id, nullable: true, editable: true, defaultValue: null, alias: Mill_ID, type: esriFieldTypeSmallInteger )
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Layer: Subdivisions Labels (1)

Name: Subdivisions Labels

Display Field: neighborhood

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description:

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Layer: Sample Points - Land Use Controls (2)

Name: Sample Points - Land Use Controls

Display Field: sample_id

Type: Feature Layer

Geometry Type: esriGeometryPoint

Description: Sample points are derived from either digitizing on scanned maps or converting from coordinates collected in fields. The attribute information is filled with the unique Sample ID renamed by adding neighborhood name and the original sample ID. The unique sample ID is also used to relate with parcels and sample results table.

Service Item Id: 7c93dbb615f340c88045a975363e6da4

Copyright Text: NDEP, BCA

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• lab_sample_id ( modelName: Lab_Sample_ID, nullable: true, editable: true, defaultValue: null, length: 25, alias: Lab_Sample_ID, type: esriFieldTypeString )
• material_type ( modelName: Material_Type, nullable: true, editable: true, defaultValue: null, length: 50, alias: Material_Type, type: esriFieldTypeString )
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Relationships:

• vector.SDE.CRMS_Institutional_Controls_Parcel_Link_Sample (0) -- Related To: Institutional Controls_Parcel_Link_Sample (7)
• vector.SDE.CRMS_Institutional_Controls_Sample_Results (1) -- Related To: Institutional Controls Sample Results (6)

Layer: Land Use Controls (3)

Name: Land Use Controls

Display Field: ownername

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description: This feature class depicts residential and non-residential parcels within the Carson River Mercury Superfund Site (CRMS) and whether or not the parcel has an institutional control associated with the property. Institutional controls include both Environmental Covenants and Covenants, Conditions, and Restrictions (CC&R's), and are part of the Nevada Division of Environmental Protection's long term management of the Carson River Mercury Superfund Site.In 2005 environmental covenants were created with the passage of Senate Bill No. 263 by the Nevada Legislature. An environmental covenant is an instrument used to define the appropriate activities and/or uses on real property that has been subject to contamination. It is a recordable instrument that is attached to the deed and runs with the property. Prior to 2005, Covenants, Conditions, and Restrictions were used as a type of Durable Notification Mechanism on properties within the Carson River Mercury Superfund Site.

Service Item Id: 7c93dbb615f340c88045a975363e6da4

Copyright Text: NDEP Bureau of Corrective Actions

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Field 1: institutional_control_cat
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Field 3: N/A
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Type ID Field: institutional_control_cat

Fields:
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• apn ( modelName: APN, nullable: true, editable: true, defaultValue: null, length: 20, alias: APN, type: esriFieldTypeString )
• ownername ( modelName: OwnerName, nullable: true, editable: true, defaultValue: null, length: 255, alias: Owner Name, type: esriFieldTypeString )
• sitecity ( modelName: SiteCity, nullable: true, editable: true, defaultValue: null, length: 255, alias: Site City, type: esriFieldTypeString )
• county ( modelName: County, nullable: true, editable: true, defaultValue: null, length: 255, alias: County, type: esriFieldTypeString )
• sourcedate ( modelName: SourceDate, nullable: true, editable: true, defaultValue: null, precision: 1, length: 29, alias: Source Date, type: esriFieldTypeDate )
• acres ( modelName: Acres, nullable: true, editable: true, defaultValue: null, alias: Acres, type: esriFieldTypeDouble )
• no_further_action_letters ( modelName: NO_FURTHER_ACTION_LETTERS, nullable: true, editable: true, defaultValue: null, length: 300, alias: No Further Action Letters, type: esriFieldTypeString )
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• ec_disclosure ( modelName: EC_Disclosure, nullable: true, editable: true, defaultValue: null, length: 255, alias: Environmental Covenant Disclosure, type: esriFieldTypeString )
• lotnumber ( modelName: LotNumber, nullable: true, editable: true, defaultValue: null, length: 25, alias: Lot Number, type: esriFieldTypeString )
• subdivision ( modelName: SUBDIVISION, nullable: true, editable: true, defaultValue: null, length: 50, alias: Subdivision, type: esriFieldTypeString )
• phase ( modelName: Phase, nullable: true, editable: true, defaultValue: null, length: 255, alias: Phase, type: esriFieldTypeString )
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• institutional_control_cat ( modelName: EC_CATEGORY, nullable: true, editable: true, defaultValue: null, length: 100, alias: Institutional Control Category, type: esriFieldTypeString , Coded Values: [Environmental Covenant: Environmental Covenant] , [Covenants, Conditions and Restrictions (CC and R): Covenants, Conditions and Restrictions (CC and R)] , [Sampled But No Environmental Covenant: Sampled But No Environmental Covenant] , ...3 more... )
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ID: Covenants, Conditions and Restrictions (CC and R)
Name: Covenants, Conditions and Restrictions (CC and R)
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---

ID: Environmental Covenant
Name: Environmental Covenant
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---

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---

ID: Not Sampled and No Environmental Covenant
Name: Not Sampled and No Environmental Covenant
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---

ID: Sample Requirement Waived; No Environmental Covenant
Name: Sample Requirement Waived; No Environmental Covenant
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Templates:
• Name: Sample Requirement Waived; No Environmental Covenant
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---

ID: Sampled But No Environmental Covenant
Name: Sampled But No Environmental Covenant
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Templates:
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  Drawing Tool: esriFeatureEditToolPolygon

---

Relationships:

• vector.SDE.CRMS_Institutional_Controls_Parcel_Link_Sample (2) -- Related To: Institutional Controls_Parcel_Link_Sample (7)

Layer: Tailings (4)

Name: Tailings

Display Field: tailingsname

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description: This feature class contains Comstock-era tailings locations throughout Operable Unit 1 (OU1) of the Carson River Mercury Site (CRMS) within Lyon and Storey Counties, Nevada. Piedmont Engineering was contracted by NDEP to conduct an archeological survey of Comstock-era mining and milling features. These locations were obtained in order to define the investigation area boundaries of the Carson River Mercury Site. The field survey took place in 1993; NDEP later created the geospatial data representing the surveyed features. Additional features were added by NDEP using historical documents and aerial imagery. The hardcopy Piedmont Engineering maps of Comstock-era mills and tailings sites were georeferenced by NDEP. Tailings polygons were digitized in ArcGIS Desktop. The original hardcopy maps were drawn at a scale of 1:2400 (written as 1" = 200' in the maps).

Service Item Id: 7c93dbb615f340c88045a975363e6da4

Copyright Text: NDEP Bureau of Corrective Actions

Default Visibility: true

MaxRecordCount: 2000

MaxSelectionCount: 0

Supported Query Formats: JSON, geoJSON, PBF

Min Scale: 0.0

Max Scale: 0.0

Supports Advanced Queries: true

Supports Statistics: true

Can Scale Symbols: false

Use Standardized Queries: true

Supports ValidateSQL: true

Supports Calculate: true

Extent:
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YMin: 4344758.1238
XMax: 279215.5851999996
YMax: 4355605.3562
Spatial Reference: 26911  (26911)  LatestVCSWkid(0)



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Renderer:
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Color: [205, 137, 102, 255]
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Supports OrderBy: true
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Supports Query With Distance: true
Supports Sql Expression: true
Supports Query With ResultType: true
Supports Returning Geometry Centroid: true
Supports Binning LOD: true
Supports Query With LOD Spatial Reference: true
Supports Percentile Statistics: true
Supports Having Clause: true
Supports Count Distinct: true
Supports Time Relation: false
Supports Sql Format: false
Supports Query Analytic: true
Supports Query With Current User: true


HasZ: false

HasM: false

Has Attachments: false

HTML Popup Type: esriServerHTMLPopupTypeAsHTMLText

Type ID Field:

Fields:
• objectid ( nullable: false, defaultValue: null, editable: false, length: 4, type: esriFieldTypeOID, modelName: objectid, alias: OBJECTID )
• tailingsname ( modelName: TailingsName, nullable: true, editable: true, defaultValue: null, length: 50, alias: TailingsName, type: esriFieldTypeString )
• comment ( modelName: Comment, nullable: true, editable: true, defaultValue: null, length: 50, alias: Comment, type: esriFieldTypeString )
• SHAPE__Length ( virtual: true, nullable: true, editable: false, defaultValue: null, alias: SHAPE__Length, type: esriFieldTypeDouble )
• SHAPE__Area ( virtual: true, nullable: true, editable: false, defaultValue: null, alias: SHAPE__Area, type: esriFieldTypeDouble )
Templates:
• Name: vector.SDE.CRMS_Tailings
  Description:
  Prototype:
  tailingsname: null
  comment: null
  
  Drawing Tool: esriFeatureEditToolPolygon

Layer: Washoe Lake Future Study Area (5)

Name: Washoe Lake Future Study Area

Display Field: ia

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description: This feature class shows the boundaries of the Washoe Lake Future Study Area/Operable Unit of the Carson River Mercury Site. Last updated in 2020.

Service Item Id: 7c93dbb615f340c88045a975363e6da4

Copyright Text: Nevada Division of Environmental Protection; EPA Region 9

Default Visibility: true

MaxRecordCount: 2000

MaxSelectionCount: 0

Supported Query Formats: JSON, geoJSON, PBF

Min Scale: 0.0

Max Scale: 0.0

Supports Advanced Queries: true

Supports Statistics: true

Can Scale Symbols: false

Use Standardized Queries: true

Supports ValidateSQL: true

Supports Calculate: true

Extent:
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YMin: 4345950.0056
XMax: 263788.2971999999
YMax: 4362319.757099999
Spatial Reference: 26911  (26911)  LatestVCSWkid(0)



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Outline:
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Transparency: 0
Labeling Info:
Feature Draw Order:
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Supports OrderBy: true
Supports Distinct: true
Supports Pagination: true
Supports TrueCurve: false
Supports Returning Query Extent: true
Supports Query With Distance: true
Supports Sql Expression: true
Supports Query With ResultType: true
Supports Returning Geometry Centroid: true
Supports Binning LOD: true
Supports Query With LOD Spatial Reference: true
Supports Percentile Statistics: true
Supports Having Clause: true
Supports Count Distinct: true
Supports Time Relation: false
Supports Sql Format: false
Supports Query Analytic: true
Supports Query With Current User: true


HasZ: false

HasM: false

Has Attachments: false

HTML Popup Type: esriServerHTMLPopupTypeAsHTMLText

Type ID Field:

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• ia ( modelName: ia, nullable: true, editable: true, defaultValue: null, length: 50, alias: Investigation Area, type: esriFieldTypeString )
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• SHAPE__Area ( virtual: true, nullable: true, editable: false, defaultValue: null, alias: SHAPE__Area, type: esriFieldTypeDouble )
Templates:
• Name: Washoe Lake Future Study Area
  Description:
  Prototype:
  ia: null
  
  Drawing Tool: esriFeatureEditToolPolygon

Tables:

Table: Institutional Controls Sample Results (6)

Name: Institutional Controls Sample Results

Display Field: sample_id

Type: Table

Geometry Type: N/A

Description: The attribute information of the table is filled with the unique Sample ID, Contaminant (Mercury, Lead, Arsenic), Concentration, Concentration Units, Depth, and Depth Units. The unique sample ID is also used to relate with confirmation sample points.

Service Item Id: 7c93dbb615f340c88045a975363e6da4

Copyright Text: NDEP, BCA

Default Visibility: false

MaxRecordCount: 2000

MaxSelectionCount: 0

Supported Query Formats: JSON, geoJSON, PBF

Supports Advanced Queries: true

Supports Statistics: true

Use Standardized Queries: true

Supports ValidateSQL: true

Supports Calculate: true

Extent:

Drawing Info:
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Feature Draw Order:
N/A
Advanced Query Capabilities:
Supports Statistics: true
Supports OrderBy: true
Supports Distinct: true
Supports Pagination: true
Supports TrueCurve: false
Supports Returning Query Extent: true
Supports Query With Distance: false
Supports Sql Expression: true
Supports Query With ResultType: true
Supports Returning Geometry Centroid: false
Supports Binning LOD: false
Supports Query With LOD Spatial Reference: false
Supports Percentile Statistics: true
Supports Having Clause: true
Supports Count Distinct: false
Supports Time Relation: false
Supports Sql Format: false
Supports Query Analytic: true
Supports Query With Current User: true


HasZ: false

HasM: false

Has Attachments: false

HTML Popup Type: esriServerHTMLPopupTypeNone

Type ID Field:

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• sample_id ( modelName: Sample_ID, nullable: true, editable: true, defaultValue: null, length: 50, alias: Sample_ID, type: esriFieldTypeString )
• contaminant ( modelName: Contaminant, nullable: true, editable: true, defaultValue: null, length: 10, alias: Contaminant, type: esriFieldTypeString )
• concentration ( modelName: Concentration, nullable: true, editable: true, defaultValue: null, length: 20, alias: Concentration, type: esriFieldTypeString )
• concentration_units ( modelName: Concentration_Units, nullable: true, editable: true, defaultValue: null, length: 8, alias: Concentration_Units, type: esriFieldTypeString )
• sample_depth ( modelName: Sample_Depth, nullable: true, editable: true, defaultValue: null, length: 10, alias: Sample_Depth, type: esriFieldTypeString )
• depth_units ( modelName: Depth_Units, nullable: true, editable: true, defaultValue: null, length: 5, alias: Depth_Units, type: esriFieldTypeString )
• relationship_label ( modelName: RELATIONSHIP_LABEL, nullable: true, editable: true, defaultValue: null, length: 200, alias: RELATIONSHIP_LABEL, type: esriFieldTypeString )
• notes ( modelName: notes, nullable: true, editable: true, defaultValue: null, length: 1000, alias: NOTES, type: esriFieldTypeString )
• concentration_numeric ( modelName: concentration_numeric, nullable: true, editable: true, defaultValue: null, alias: Concentration_numeric, type: esriFieldTypeDouble )
• qualifier ( modelName: qualifier, nullable: true, editable: true, defaultValue: null, length: 10, alias: Qualifier, type: esriFieldTypeString )
Templates:
• Name: Institutional Controls Sample Results
  Description:
  Prototype:
  concentration_numeric: null
  relationship_label: null
  sample_depth: null
  depth_units: null
  notes: null
  contaminant: null
  qualifier: null
  sample_id: null
  concentration_units: null
  concentration: null
  
  Drawing Tool: esriFeatureEditToolNone

Relationships:

• vector.SDE.CRMS_Institutional_Controls_Sample_Points (1) -- Related To: Sample Points - Land Use Controls (2)

Table: Institutional Controls_Parcel_Link_Sample (7)

Name: Institutional Controls_Parcel_Link_Sample

Display Field: sample_id

Type: Table

Geometry Type: N/A

Description: The table is filled with APN and Sample ID organized from parcels and confirmation sample points according to how many confirmation sample points each parcel contains.

Service Item Id: 7c93dbb615f340c88045a975363e6da4

Copyright Text: NDEP, BCA

Default Visibility: false

MaxRecordCount: 2000

MaxSelectionCount: 0

Supported Query Formats: JSON, geoJSON, PBF

Supports Advanced Queries: true

Supports Statistics: true

Use Standardized Queries: true

Supports ValidateSQL: true

Supports Calculate: true

Extent:

Drawing Info:
N/A
Feature Draw Order:
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Advanced Query Capabilities:
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Supports OrderBy: true
Supports Distinct: true
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Supports TrueCurve: false
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Supports Query With Distance: false
Supports Sql Expression: true
Supports Query With ResultType: true
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Supports Binning LOD: false
Supports Query With LOD Spatial Reference: false
Supports Percentile Statistics: true
Supports Having Clause: true
Supports Count Distinct: false
Supports Time Relation: false
Supports Sql Format: false
Supports Query Analytic: true
Supports Query With Current User: true


HasZ: false

HasM: false

Has Attachments: false

HTML Popup Type: esriServerHTMLPopupTypeNone

Type ID Field:

Fields:
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• sample_id ( modelName: Sample_ID, nullable: true, editable: true, defaultValue: null, length: 50, alias: Sample_ID, type: esriFieldTypeString )
• apn ( modelName: APN, nullable: true, editable: true, defaultValue: null, length: 50, alias: APN, type: esriFieldTypeString )
Templates:
• Name: Institutional Controls_Parcel_Link_Sample
  Description:
  Prototype:
  sample_id: null
  apn: null
  
  Drawing Tool: esriFeatureEditToolNone

Relationships:

• vector.SDE.CRMS_Institutional_Controls_Sample_Points (0) -- Related To: Sample Points - Land Use Controls (2)
• vector.SDE.CRMS_Institutional_Controls (2) -- Related To: Land Use Controls (3)