My WebLink
|
Help
|
About
|
Sign Out
Home
Browse
Search
2020-07-06_GENERAL DOCUMENTS - C1994082
DRMS
>
Day Forward
>
General Documents
>
Coal
>
C1994082
>
2020-07-06_GENERAL DOCUMENTS - C1994082
Metadata
Thumbnails
Annotations
Entry Properties
Last modified
7/7/2020 2:28:12 PM
Creation date
7/7/2020 2:26:00 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1994082
IBM Index Class Name
General Documents
Doc Date
7/6/2020
Doc Name Note
For SL7
Doc Name
Proposed Decision and Findings of Compliance
From
DRMS
To
Seneca Property LLC
Permit Index Doc Type
Findings
Email Name
RAR
JLE
Media Type
D
Archive
No
There are no annotations on this page.
Document management portal powered by Laserfiche WebLink 9 © 1998-2015
Laserfiche.
All rights reserved.
/
23
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).
View images
View plain text
Post -Mining Land Use <br />The post -mining land uses for the SPL are rangeland for enhanced domestic livestock grazing <br />and wildlife habitat. The reclaimed lands associated with the Phase III portion of SL7 have <br />vegetative cover composed of a variety of grasses, forbs, and woody shrubs. The seasonality <br />and forage characteristics of the vegetative species are suitable for the approved post -mining <br />land use. No significant weed problems or bare areas were identified. <br />SPL has implemented an annual grazing plan on reclaimed lands at the Yoast Mine since 2009. <br />SPL's grazing plan takes into account the available forage biomass. Livestock is stocked at an <br />appropriate capacity to leave no less than 50% of the available forage biomass. Grazing was <br />conducted annually from August through September. <br />The revegetation success standards were based on what would be necessary for the land to <br />properly function as grazing and wildlife habitat. Based on the achievement of the <br />requirements, the Division finds that the revegetation on the SPL Phase III reclaimed areas is <br />capable of supporting the approved post -mining land uses. <br />Evaluation of Hydrologic Impacts <br />In accordance with Section 3.03.2(2), the Division has evaluated whether pollution of surface or <br />subsurface water is occurring, and the probability of future occurrence of such pollution. The <br />evaluation considered information in the following documents: the Probable Hydrologic <br />Consequences section of the permit application, Annual Hydrology Reports submitted by the <br />operator, the Division's Annual Hydrology Report review memoranda, and documents in the <br />SL7 bond release application and file. The results of the evaluation are summarized below. <br />Basic Standards Interim Narrative Standard for Ground Water (CWQCC Regulation 41.5(c) (6)) <br />The Yoast Mine alluvial ground water point of compliance (GWPOC) in the Grassy Creek <br />alluvium is well SGAL70. The alluvial GWPOC in the Sage Creek alluvium is well YSAL3. <br />The Phase III areas are in the upper and lower reaches of the drainage basins, therefore, a review <br />of the statistical summary of the water quality of SGAL70 and YSAL3 was completed based <br />on water quality data presented in the Annual Hydrology Reports for the Yoast Mine. Based on <br />the data collected, ambient values for both GWPOC were found to be lower than the Colorado <br />Water Quality Control Commission (CWQCC) Regulation 41 standards. The groundwater quality <br />at SGAL70 met water quality standards for all parameters except for dissolved cadmium and <br />dissolved selenium, where three samples for dissolved cadmium exceeded the standard. However the <br />lab detection limit is above the standard. None of the exceedances were associated with measurable <br />values of cadmium and cadmium has not historically posed an issue at the Yoast Mine. The <br />excursion was deemed due to elevated concentrations in the lab batch or unrelated instrument <br />interference. The selenium excursion was also deemed an anomaly as no other sample during the <br />previous five years exceeded the standard. For the past three water years (2016 to 2019), no <br />standard was exceeded at YSAL3. <br />SPL does not have a groundwater point of compliance for ground water in bedrock stratigraphic <br />units, based on the absence of the potential for the mine to negatively impact the quality of <br />bedrock ground water. The low hydraulic conductivities of the bedrock units and confining <br />layers isolate mine -impacted water -bearing units from the nearest usable aquifer, the Trout Creels <br />Sandstone, which lies approximately 300 to 400 feet below the Wadge Coal seam and <br />approximately 60 to 100 feet below the Wolf Creek Coal seam. <br />Permit Number C-1994-082 Page 17 of 23 <br />
The URL can be used to link to this page
Your browser does not support the video tag.