Description: This is a combined dataset of the stream channels and culverts/undergound pipes delineated for the Stibnite Gold project during the 2011-2019 field seasons. This same dataset includes the 2017 Logistics Center delineation as no additional OHWM's were added for that effort. Stream segments were added in 2016 on the BL alignment and the camp area to connect stream channels for analysis purposes.To show culverts in lieu of stream segments for cartography, use a def query to hide the stream segments with DisplayLine = "culvertrem". To calculate stream impacts, use a def query to hide culverts and pipes (FeatureType not in ('culvert','pipe'))Tetra Tech added fields- TTJurisdictional_Determination- USACE jurisdictional determination. Source-[Documents that convey the Jurisdictional Determination], TTCulvert_dup-[To calculate stream impacts, use a definition query to hide duplicate culvert and pipe polylines (Culvert_dup <> 'Y')], TTStreamName-[Tetra Tech modified stream names], TTDrainage-[Tetra Tech modified drainages], TTWatershedName-[GNIS name for the geographic area in which the hydrologic unit is located from the USGS National Watershed Boundary Dataset], TTHUC10-[10-digit hydrologic unit boundaries from the USGS National Watershed Boundary Dataset], TTHydrographic_Cat-[Updated hydrographic category with attributed 2015 type].Ecosystem Sciences used LiDAR data to true-up existing ephemeral stream channels and to add new ephemeral streams to the dataset. Tetra Tech modified existing stream delineations to match Ecosystem Science LiDAR data and added hydrography and stream reaches from Rio.This dataset and metadata was last edited on 2/28/2019.
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Description: This layer depicts the mine feature disturbance area over time for the Stibnite Gold Project for Midas Gold. Features have been attributed so that they can be queried based on the year that the disturbance starts, and in some cases when it ends (such as when a haul road disturbance is overtaken by the disturbance area of a pit.) The origins of the layer are from the Project_Disturbance_Boundary feature class from within the PRO geodatabase. The DRSFs, TSF, and Open Pit features were updated with features digitized from EOY TIN files provided by Midas Gold. Mine feature footprints were expanded to include the entire area that falls within or below a surface water diversion, as in the area of the TSF and Hangar Flats DRSF. New features were digitized to fill in small sliver gaps not covered by the individual mine features, such as between Hangar Flats Pit and the Hangar Flats Reclamation/Stockpile Area. Timing of feature occurence was provided by Midas Gold. Areas related to the Burntlog Route were generated by Parametrix. Areas related to the powerline were generated by HDR. Buffers were created around the utility poles based on information gleaned from the POD.The dataset was updated in Jan 2021 to match the MaximumFeatureExtent_StibniteMine footprint.
Copyright Text: Mine Plan: Ryan McClusky, MGII
GIS: Koda Merkley, MGII
Facility Attributes: Mary Garner, Tetra Tech