INSPEC44378

• Permit No: M1977342
• IBM Index Class Name: Inspection
• From: MLR
• Media Type: D
• Archive: No

Paye
Major Structure in and Adjacent to Permit Area
Comments:
Numerous buildings associated with the mining and milling operation
Topsoil Handling
Quantity of topsoil being salvaged
Procedures
Proper stockpile location
Stockpile stabilization
Depth of replaced topsoil
Stability
Comments:
1) Topsoil has been stockpiled as outlined in the plan immediately north of the
seepwater entrapment area. The stockpile has been stabilized with an
excellent stand of grass.
2) For topsoil replacement - note problems outlined under grading
Revegetation
Vegetation efforts on schedule
Site preparation proper
Fertilization needed
Suitable species
Estimate cover
Poisonous or noxious species
Weed control needed
Livestock use
Wildlife use
Reseeding necessary
Fencing
Comments:
1) Inspection of the tailing revegetation test plots indicated a general lack of
success at revegetation of pure tailing san ds.
2) Diversity of the reclaimed areas is fairly low since the introduced grasses planted
tend to be very aggressive often excluding natives. Revegetation of the Bench slopes
of the Henderson tailings was poor, illustr ating a distinct need for some topsoil which
was replaced but was not consistent in th ickness, thereby forming pockets in which
vegetation success was high, and areas wher e there ~~~as no growth.
3) "Topsoiled" tailing dam was planted during the fall, 1980.
Problems Recommendations
1) Topsoil depth on slopes is outside of the 1) Alternative ways of spreading topsoil
range 6-18" specified in the permit, need to be considerec to obtain a
2) The operator will have a difficult time uniform depth of 6-18 inches.
keeping topsoil from eroding off of the 2) The operator should reconsider all
steep slopes at the tailing dam and mine steep slopes and reduce them when
yard bench. l:l and 1.6:1 slopes are possible.
difficult if not impossible to topsoils 3) The inspection team feels that due to
erosion will be a continuous problem. the loss of topsoil, the Henderson
This erosion will not only make revege- Mine is significantly reducing the
tation difficult but could cuase stability chances for successful reclamation.
problems if not corrected. The currently approved reclamation
3) The inspection team noted that revegetation plan for [he tailings should be
of pure tailing material as seen at the reconsidered by the operator.
climax study plots and portions of the 4) This potential problem should be
Henderson tailing dam has failed. Rock considered while there is still time
covered tailing with wood chips and for corrections.
and sludge as seen at urad has been