2010-07-14_GENERAL DOCUMENTS - C1980001

• Permit No: C1980001
• IBM Index Class Name: GENERAL DOCUMENTS
• Doc Date: 7/14/2010
• Doc Name: Verification of Weed Management
• From: Habitat Management Inc
• To: DRMS
• Permit Index Doc Type: Vegetation
• Email Name: JHB
• Media Type: D
• Archive: No

CENED
JUL 14 2010
July 13, 2010
Divicv?a,-...,,
Wining and 2k-ty
Janet Binns
Colorado Division of
Reclamation, Mining & Safety
1313 Sherman St., Rm. 215
Denver, CO 80203
Habitat Management, Inc.
Environmental & Natural Resou rce Management
Consulting& Cbnstrudion %rvioes
Re: Verification of Weed Management for Moffat Area, P&M Edna Mine
Dear Janet,
The Division of Reclamation, Mining and Safety has requested that P&M demonstrate the
success of noxious weed management in the Moffat area of the Edna mine. Habitat Management
Inc. will be conducting the necessary sampling to demonstrate a noxious weed cover of less than
3%. We propose to use the vegetation cover sampling methods described in the Edna Mine
Vegetation Final Bond Release Monitoring Plan (dated April 8, 2005) on file with and approved
by the Colorado DRMS.
Randomly selected and oriented transects will be sampled using the point intercept methods
described in the Plan. I have copied the "Vegetation Cover" section of the Plan below for your
convenience.
Point-intercept line-transects will be used to measure vegetation cover. Point-intercept
line-transects will begin at the designated sample start point and will be oriented as
previously described above. A line-transect 10-meters in length will be used to collect
cover point intercepts. Point intercept cover measurements will be observed and
recorded at 10 centimeter intervals along the sample line-transect from 0.1 meters to 10
meters. Intercept points will be taken along and parallel to the line-transect orientation. A
laser bar with the beams set 10 centimeters apart will be used to take cover readings,
with the beams being projected perpendicularly to the ground surface. Along each line-
transect a total of 100 point-intercepts will be recorded in this fashion. Each point-
intercept will be assigned an absolute cover value of 1 %. Cover measurements will
record "first-hit" point-intercepts by either: plant species (living vegetation), litter, rock, or
bare ground. Litter will include all organic material that is dead. Rock fragments will be
recorded when particle size is equal to or greater than one square centimeter. Total
vegetative cover will be reported in absolute percentages from first hit point-intercept data
for each line-transect sample point.
A minimum of 15 samples will be collected in the Moffat area. Samples will be collected until a
maximum sample size of 50 is reached, or a statistically adequate sample size is obtained.
Sample size adequacy will be calculated using the formula from the DMRS guidance documents:
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Habitat Management, Inc.
e- 141nvernessDriveEast- %iteA-100• Englewood- CC) 80112
andt, Environmental Scientist' 303-770-9788' [e-mail]