2016-03-24_REPORT - M1977424

• Permit No: M1977424
• IBM Index Class Name: Report
• Doc Date: 3/24/2016
• Doc Name: Annual Fee, Report & Map
• From: Logan Wash
• To: DRMS
• Annual Report Year: 2016
• Email Name: THM
• Media Type: D
• Archive: No

Logan Wash Mine Annual Report
Permit No. M-1977-424
5.1 Mine Maintenance
During the reporting period, inspections of the Logan Wash Mine site occurred on a weekly to
monthly basis during April,2015 through February,2016. The upper mine facilities are usually
not accessible from December through March due to deep snowpack and poor road conditions,
but light snowpack in early winter allowed reasonable access by vehicle and on foot. Inspections
focused on mine roads, headwalls,portal closures, bench surfaces,dump faces,constructed storm
drainage and rip-rap channels, and the mine water infiltration trench which after 6 months of
monitoring was backfilled on November 13, 2015. Mine water discharge rates and Evaporation
Pond water levels were periodically monitored and recorded(Section 3.2).
Road maintenance activities included grading of the running surface of the Upper Access Road
from the main Logan Wash Road to the Research Mine Bench,and the Evaporation Pond Road.
The road maintenance also included the maintenance of stormwater runoff ditches and waterdips.
Grading of the Lower Bench Road was avoided in the interest of protecting P. debilis habitat(see
Section 8.0).
5.2 Evaporation Pond Maintenance
Maintenance of the Evaporation Pond included inspection of. 1)discharge rates to the pond from
the mine retort water plumbing system; 2)the leak detection vault; 3)wildlife security fence; 4)
stormwater drainage ditches; and 5)general conditions of the pond, liner, and egress ladders. The
Evaporation Pond Road was graded and was capped with 3 inch road base in October,2015. This
was done with approval from the BLM to allow better year-around access to the pond. The leak
detection vault sump pump, batteries and solar controller were replaced.No liner repair was
conducted in the reporting period. Other minor repairs were conducted when needed.
6.0 Anticipated Reclamation in the Year 2016
Because the fate of mine water and retort water discharge is currently being assessed under
Amendment No. 1,OOSI does not anticipate revegetation or reclamation of any unreclaimed
roads or disturbed surface areas at the mine site in 2016.
Saplings that were planted on the mine dump faces will be assessed for overall health and
mortality.No mechanical irrigation of these saplings is anticipated. Roads not reclaimed will be
maintained.Transplanting of P. debilis will be conducted if deemed necessary for plants located
on the Lower Bench Road;plants will be moved to the fill slope area adjacent to the road.
Evaporation Pond maintenance will be conducted as needed. OOSI may begin preparation of
work plans to install a new liner at the pond. DRMS will be kept informed of any plans to begin
field installation of the liner; a technical revision will be prepared, if required.
OOSI anticipates submittal of several revegetated areas for reclamation(warranty)release in
2016.
7.0 Anticipated Disturbance in the Year 2016
OOSI is in the process of evaluating final mine closure alternatives,focusing on mine water
management.No new disturbance is anticipated to occur in 2016 at this time within the mine
permit area associated with OOSI mine permit activities. Minor ground disturbance may occur on
the Lower Bench Road which is currently not under reclamation,during transplanting of P.
Western Water & Land, Inc. 9