2019-07-24_GENERAL DOCUMENTS - C1981010

• Permit No: C1981010
• IBM Index Class Name: General Documents
• Doc Date: 7/24/2019
• Doc Name Note: For SL18
• From: DRMS
• To: Trapper Mining Inc
• Permit Index Doc Type: Findings
• Email Name: RAR
• Media Type: D
• Archive: No

Transect 10
7130.5
7124.84
0
4-1
7099.91
w
PARR Map M1
7098.5
Height Above MSL
(Mean Sea Level)
A 6
Figure 10: Transect 10 elevation cross sections as per TMI snaps and field collected data.
Overall. based on the Division's inspection and review, the bond release parcels have been backfilled and
graded in accordance with the approved reclamation plan and the approved post-mining topography.
The grade and slope of the reclaimed parcels were comparable to the approved post-mining topography.
The highwalls have been reclaimed. Some rills were observed in the bond release parcels; however,
significant erosional features and signs of instability were not observed during the bond release
inspection. As vegetation establishes throughout the reclaimed parcels, the amount of rills diminishes.
Large swales and depressions were not observed during the inspection of the bond release parcels. The
graded parcels blend into adjacent regarded land. Each of these parcels drains into a reconstructed
channel which discharges into a system of sediment ponds. See the Drainage Reconstruction section
below for more details.
Drainage Reconstruction
In general, each of the SL18 bond release parcels has a northeast or a northwest aspect with positive
drainage established. Runoff from each parcel flows into drainage channels and then into sedimentation
ponds prior to water discharging from the site. Several reconstructed channels were included within the
bond release block as per Map 1 and the various transect maps. Please note that portions of drainage
channels removed from previous bond releases were inserted in this action as follows:
o A portion of a small tributary to Oak Gulch drainage located within Parcel AB9.
o A portion of drainage channel FA 16 associated with that parcel and reporting to East Pyeatt
Pond.
o A portion of drainage channel AB 16 (transect 9), associated with that parcel and reporting to
Middle Pyeatt Pond.
These areas were functional, stable and no problems were noted at the time of the inspection. Other
drainage channels inspected comprised:
o Channel emanating in parcel ZA 13 (Phase I approved) and flowing through parcel ZA 16,
Permit Number C1981010 Prepared by: R.Reilley,MS,LISP
SL 18 Page 17 of 22