GENERAL48047

• Permit No: C1981028
• IBM Index Class Name: General Documents
• Doc Date: 10/30/2006
• Doc Name: Proposed Decision & Findings of Compliance for RN5
• Permit Index Doc Type: Findings
• Media Type: D
• Archive: No

XIII. Rule 4.13 Contemporaneous Reclamation
Variances to contemporaneous reclamation, for the backfilling and grading of Pit A (completed)
and Pit B and for the current backfilling with fly ash, were granted during mining operations. See
Backfilling and Grading following.
XIV. Rule 4.14 Backfilling and Grading
CEC requested additional time for backfilling and grading following coal removal in a contour
strip mine. A detailed written analysis provided by CEC in accordance with Section 2.05.4(2)(c)
has demonstrated that additional time was necessary. Therefore, the Division approved the
additional time [Rule 4.14.1(1)]. A variance was granted in February 28, 1989 to allow for use of
the A and B pits as fly ash disposal sites (Technical Revision 20). Flyash disposal is anticipated
to last to 2020 [PAP, Section 2.05.3, page 117].
The Division approved a minor modification of the general requirements of Rule 4.14.2 for
reclamation of Pits A and B to approximate original contour to accommodate the disposal of
flyash [PAP, Section 2.05.4, page 113]. Slopes aze slightly steeper to reduce infiltration to the
buried flyash.
XV. Rule 4.15 Revegetation
A. The approved revegetation plan emphasizes native species.
B. A sorghum mulch was approved as an optional means to meet soil stabilization
requirements until vegetation is re-established [PAP, Section 2.05.4, page 115a] [Rule
4,15.4].
C. Approved methods to measure herbaceous cover and production, and species diversity
aze discussed in the PAP, Section 2.04.10(4) Plant Community Measurements (see also
PAP, Section 2.04.10). For this permit, there is no minimum density (stems/acre) standard
for woody plant reestablishment (PAP, Section 2.05.4, page 116a). These techniques
include selection of sample locations using randomly-generated grid coordinates, random
determination of transect directions, and use of a stationary optical sighting device to
determine hits. [Rule 4.15.7(1)]
D. Reclamation success for vegetative cover will be determined using an approved
formula which accounts for effective precipitation. The formula used to determine
successful vegetative cover is: y=0.0173x3 - 0.8592xZ + 14.562x - 47.015, where x equals
precipitation measured at the mine site from September 1st through July 31st preceding the
vegetative sampling event, and y equals vegetative cover. The measured vegetative cover
on the reclaimed area shall not be less than 90 percent of the calculated cover value with a
90 percent statistical confidence of the calculated value. This formula was derived from
data collected on the Osgood reference area over a ten yeaz period.
Permit Renewa105 Findings
October 30, 2006
Page 22 of 25 Pages