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
Visual observations of the reclaimed areas by the Division during the combined Phase II/Phase III <br />bond release and prior inspections indicate that the proposed release area does not exhibit excessive <br />rills or gullies that would be indicative of excessive erosion and resultant sediment transport. The <br />Division finds that revegetation efforts on the bond release areas are adequate to control erosion and <br />that the reclaimed areas are not contributing suspended solids to streamflow or run off outside the <br />permit area in excess of levels determined on adjacent non mined areas. The sampling methods used <br />for the various criteria below meet the rigors outlined in Rule 4.15.11(1) and the permit application. <br />Phase III Revegetation Standards and Success <br />All areas requested for combined Phase II and III (39.4 acres), bond release per SL7 have previously <br />received Phase I release and meet the minimum liability period as required by Rule 3.02.3(2)(b). The <br />applicant is requesting Phase III bond release on 315 acres that have achieved Phase I and 11 release <br />previously. Given this, the total proposed Phase III bond release area for SL7 is 354.4 acres. <br />Transect data tables, sample adequacy, production and diversity calculations are presented in <br />Attachment D of the SL7 application and seed mixes are documented in the Annual Reclamation <br />Reports. For a thorough discussion of standards, mandatory and alternative tests, and calculations <br />please refer to the PAP, the SL7 bond release request and the associated Appendix D. <br />Cover success was discussed in the Phase II portion of this document. The bond release block was <br />also evaluated for Phase III release. The success standard for cover was achieved for both year 2015 <br />and 2016. <br />Production <br />Production sampling comprises harvesting of biomass produced during the current year within a 0.5 <br />square meter sample plot. Lichens, mosses, noxious weeds and shrub production are not clipped. <br />Following clipping, the material is oven dried and weighed to determine average production for <br />the bond release blocks (BRB). Units comprise grams per square meter (gm/0.5 sq m), and <br />pounds per acre (lbs/ac). The allowable herbaceous production values for the four vegetation types <br />in the reference area are used in the weight averaged calculations to determine the production <br />standard. <br />Thirty production transects were sampled in 2015 and 35 in year 2016 and 32 transects in each <br />reference area in both years. Reclamation productivity success will be considered successful <br />when annual herbaceous production on the bond release area is 90 percent or greater than the <br />annual herbaceous production weighted average based on the four primary pre mine vegetation <br />type contributions to total acreage. <br />Sample adequacy was not demonstrated with 30 samples in either the reclaimed or the reference <br />areas for years 2015 and 2016. Therefore, reclamation success for Phase III is demonstrated by <br />passing a one sample t-test of the "reverse null" hypothesis (CDMG 2005 revised rule, 4.15.11 (2)(c)) <br />and following a square root transformation of the data, the test was passed. <br />The 2015 BR132 reclaimed area mean allowable herbaceous production of 1,709.2 pounds per acre <br />far exceeded 90 percent of the production performance standard of 736.4 pounds per acre. The <br />average herbaceous production by annuals and biennials sampled in the BRB-2 was less than 10% of <br />total herbaceous production. <br />Permit Number C-1994-082 Page 14 of 23 <br />
The URL can be used to link to this page
Your browser does not support the video tag.