REP02859

• Permit No: C1980006
• IBM Index Class Name: Report
• Doc Date: 12/16/1998
• Doc Name: KERR COAL CO MARR MINE VEGETATION SAMPLING FOR INTERIM MONITORING AND BOND RELEASE TABLE CONTENTS
• Permit Index Doc Type: REVEG MONITORING REPORT
• Media Type: D
• Archive: No

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' monitoring program for ocular estimation of cover by this technique. For this project, the time
efficiencies of Quadrat sampling are minimized over the line transect method in the reclaimed
area since a line transect must be established anyway for shrub density sampling. As a result.
the line transect method, utilizing a 50 meter line transect, was employed. Points were recorded
at every meter along the 50 meter tape.
A ten-point frame positioned perpendicular to the transect and on the right side of [he tape
was utilized to minimize potential bias The sixth pin from the tape was used to record the
sample point
' Production:
Rocky Mountain Reclamation utilized a meter square quadrat for production sampling. A
smaller quadrat could be substituted, but sample adequacy would be expected to be reduced if
' the same number of quadrats were sampled. Utilizing a meter square quadrat for this study was
an important factor leading to the high degree of statistical reliability obtained from this year's
sampling.
The meter square quadrat was randomly located utilizing two random numbers and was
located the distance of the first number along the transect and the distance of the second
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Samples were collected by life form by clipping this year's above ground biomass
production. Bagged samples were then oven dried at 1000 until weights were stabilized.
Weights were then recorded to the nearest 0.1 gram.
Shrub Density:
Shrub density for the reclaimed area was determined utilizing 100 square meter Belt
' Transects. Shrub density data collection were not required for the reference area as this
information is already available. Shrubs were individually counted for 1.0 meter on each side of
the 50 meter line transect used for cover estimation.
Statistical Analyses:
Data were collected, analyzed, and presented according to the procedures and formats
discussed with Ms. Janet Binns, State of Colorado Division of Minerals and Geology. Sampling
' continued until required sample adequacy was met. A one-sided test with a 0.10 alpha error
probability consistent with a 90 percent confidence level was utilized for statistical analyses.
Sampling analyses included the actual confidence level attained from field sampling (Appendix
' B, Cover, Production, and Shrub Density tables),
For the two reference areas, fifty sample locations (for the line transects and quadrats)
' were initially randomly located prior to field work and were then established in the field. A grid
was established for each reference area and a random numbers table was utilized to locate
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