REP36304

• Permit No: C1981028
• IBM Index Class Name: Report
• Doc Date: 12/11/2001
• Doc Name: 1999 AHR & ARR VEGETATION
• Annual Report Year: 1999
• Permit Index Doc Type: HYDROLOGY REPORT
• Media Type: D
• Archive: No

• II. METHODS
SAMPLING DESIGN
•

Prior to initiation of fieldwork, the permit document and applicable maps were reviewed
to evaluate topography, reclamation timing, seed mixes, revegetation methods, and
applicable revegetation standazds.
A map of the mine site at 1:2400 scale (1"=200') was used to delineate the revegetated
azeas (Coors Site Plan; Vegetation Sampling Locations). On a gridded overlay of the
revegetation map, a Cartesian coordinate grid (100x100 feet) was established. Computer
generated random numbers were used to establish a pool of x,y coordinates. Since the
reclaimed pazcels for the years and azeas to be evaluated were non-contiguous (e.g.,
separated by road corridors or reclamation years), each revegetated azea was gridded
sepazately. The acreage of each revegetated area was established. Random sample
locations were established for each revegetated area. Within each year's revegetation
pazcels, sufficient samples were established to represent each discontinuous area by
proportional acreage. The following table identifies and locations of each pazcel
quantitatively sampled, the acreage, and the number of cover and herbaceous production
samples taken.
Location Cover (N of samples) Herb. Prod. (1i of samples)
1995 Reclamatioa Areas
Ti le 7.4 ac 2 3
W of sediment and (1.4 ac. I I
S of sediment and (9.3 ac. 3 4
SW comer (5 ac. 2 2
SE area 7 ac. 2 2
NW Road Corridor 10.5 ac. 3 4
E of'87 West area 1.7 ac. I I
E of A Pit 8.1 ac. 2 3
Total Sam les 1995 Areas 16 20

1997 Reclamation Areas
E of B Pit 3.6 ac. 2 3
S of B Pit 8.6 ac. 4 6
W of A Pit 1.4 ac. I 2
Road Corridor 4.5 ac. 3 4
Total Sam les 1997 Areas 10 15

Reseedia oterseedia s
W of Du out 2 ac. I I
W of A Pit 2.7 ac. 1 I
S of'87 Area 9.7 ac. 2 2
E of'87 Area (9.7 ac. I I
Total Sam les Reseedio s 5 5
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