2015-05-14_REVISION - M1980244 ‎(3)‎

• Permit No: M1980244
• IBM Index Class Name: REVISION
• Doc Date: 5/14/2015
• Doc Name: Request TR75
• From: CC&V
• To: DRMS
• Type & Sequence: TR75
• Email Name: TC1
• Email Name: MAC
• Email Name: GRM
• Email Name: WHE
• Media Type: D
• Archive: No

areas 1/10 acre or larger with a rating of three. Medium infestations include areas 100
square feet to 1/10 acre with a rating of two. Small infestations include areas smaller than
100 square feet. A light density is defined as an infested area where noxious weeds make
up less than 10% of the total vegetation. Moderate density is defined as 10-50% cover of
noxious weeds, and heavy density is defines as with more than 50% noxious weeds
cover. Size and density evaluations can be made with a quick visual assessment, as the
precise ranking is not as important as the overall strategy for the site.
Table 1. Population Size and Density Prioritization
3.3 Integrated Pest Management (IPM) Methods
Successful weed management begins with an understanding of the target plant species
and the environment within which it grows. An Integrated Pest Management (IPM)
approach will be implemented for the treatment of weeds on the mine property. An IPM
approach enables selection of one or more weed management methods based on the
characteristic of the weed species, site specific environmental conditions, and
management priorities. IPM methods include chemical, mechanical, cultural, and
biological control.
3.3.1 Cultural Control
Germination and establishment of weeds can be significantly reduced by following
accepted revegetation techniques that favor the growth of desirable species. These
include prompt seeding and revegetation of disturbed areas with appropriate seed mixes,
maintaining optimum fertility and moisture levels, seeding optimum density, and
selecting suitable species for revegetation. Minimizing areas of disturbance and exposed
soil prevents opportunities for aggressive species to establish, and establishing desirable
and native species can help to limit establishment of undesirable weeds.
3.3.2 Mechanical Control
Mechanical control of noxious weeds can be an effective tool to physically disrupt
noxious weed growth and seed development. A combination of mechanical methods may
be used including tilling or disking, mowing, hand-held weed trimmers, mulching, hand -
pulling, hoeing, or livestock grazing. Mechanical weed control practices must be applied
with correct timing to maximize their effectiveness in preventing vegetation development
or seed production. Re -grading areas and burying infestations with clean soil can be used
to control heavily infested areas that chemical control is not enough to control the
infestation. Removing flower and seed heads from a noxious weed plant and disposing of
Anglo Gold Mine Weed Management Plan 4
Density of
Infestation
Size of
Population
Density
Plants per
Population
Size
Populations
Rating
Level
area
Ratin
Small
<100 sq. ft.
1
Light
<10%
1
100 sq. ft. to
Medium
1/10 acre
2
Moderate
10%-50%
2
Large
1/10 acre>
3 11
Heavy
50%>
3
3.3 Integrated Pest Management (IPM) Methods
Successful weed management begins with an understanding of the target plant species
and the environment within which it grows. An Integrated Pest Management (IPM)
approach will be implemented for the treatment of weeds on the mine property. An IPM
approach enables selection of one or more weed management methods based on the
characteristic of the weed species, site specific environmental conditions, and
management priorities. IPM methods include chemical, mechanical, cultural, and
biological control.
3.3.1 Cultural Control
Germination and establishment of weeds can be significantly reduced by following
accepted revegetation techniques that favor the growth of desirable species. These
include prompt seeding and revegetation of disturbed areas with appropriate seed mixes,
maintaining optimum fertility and moisture levels, seeding optimum density, and
selecting suitable species for revegetation. Minimizing areas of disturbance and exposed
soil prevents opportunities for aggressive species to establish, and establishing desirable
and native species can help to limit establishment of undesirable weeds.
3.3.2 Mechanical Control
Mechanical control of noxious weeds can be an effective tool to physically disrupt
noxious weed growth and seed development. A combination of mechanical methods may
be used including tilling or disking, mowing, hand-held weed trimmers, mulching, hand -
pulling, hoeing, or livestock grazing. Mechanical weed control practices must be applied
with correct timing to maximize their effectiveness in preventing vegetation development
or seed production. Re -grading areas and burying infestations with clean soil can be used
to control heavily infested areas that chemical control is not enough to control the
infestation. Removing flower and seed heads from a noxious weed plant and disposing of
Anglo Gold Mine Weed Management Plan 4