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85
APPENDIX C
DATA
TYPE OF TEST; SPECIFIC CAPACITY/RECOVERY
PUMPING WELL NO. : 61
CASING DIAMETER; 0.42 ft TOTAL DEPTH: 119 ft HOLE DIAMETER: 0.66 ft
SCREENED INTERVAL: 108-119 ft TYPE OF AQUIFER: confined (coal ) _
STATIC WATER LEVEL: 40.46 ft TOP OF CASING ABOVE GROUND SURFACE:
CEMENTED INTERVAL; 0-10 ft
TOTAL PUMPING TIME: tp = 95 min
WATER METER READING: END = 4759.5 gal
START = 4690.9 gal
AVERAGE DISCHARGE OVER PUMPING PERIOD: 0.72 gpm = 0.1 ft3/min
Time Depth to Drawdown Temp pH Spec.Res. EC@T EC@25°C
Min Wfer ft °C ohm-cm mmhos/cm :mmhos/cm
0.5 40.06 -0.40 15 440 2.27
1 .0 40.19 -0.27
2.0 41 .38 0.92
2.5 41 .54 1 . 08
3. 5 41 .94 1 .48
5 43.54 3.08
6 44.19 3.73
7 44.88 4.42
8- 45.48 5.02
9 46.29 5.83
10 46.95 6.49 15 770 3.70 4.62
12 48.22 7.76
14 49.22 8.76 16 7.3 270 3.70 4.51
16 50.34 9.88
18 51 .42 10.96
20 52.38 11 .92
25 55. 59 15. 13
30 59. 19 18.73
35 65. 21 21 .75 18 7.5 260 3.85 4.48
40 66.42 25.96
45 69.88 29.42
50 72.75 32.29
60 73.67 38.21 18 7.9 380 2.63 3.06
85 95.94 55.48
95 101 .78 61 .33 18 9.3 510 1 .96 2.78
pump shut off - start recovery
85
WELL # 61 (cont'd)
Depth to
Time Water Dra own t/t-tP Temp pH Spec,Res. EC@T EC@25°C
Min ft ohm-cm mmhos/cm mmhos/cm
105 101 .75 61 .29 10.5
108 100.28 59.82 8.31
115 100.29 59.83 5.75
125 100.00 59.54 4. 17
135 99.04 58.58 3.38 _
150 98.04 57.58 2.73
160 97.38 56.92 2.46
175 96.29 55.83 2. 19
190 95.35 54.89 2.00
205 94.72 54. 26 1 .86
230 93. 63 53.17 1 .70
264 92.08 51 .62 1 .56 18 9.2 480 2.08 2.-2
Pumping started again at end of recovery test to collect another water
sample.
87
TYPE OF TEST: DRAWDOWN/RECOVERY
PUMPING WELL NO. : 61
CASING DIAMETER: 0.17 ft TOTAL DEPTH: 115 ft HOLE DIAMETER: 0.4 ft
SCREENED INTERVAL: 105-115 ft TYPE OF AQUIFER: confined
STATIC WATER LEVEL: 40.21 ft TOP OF CASING ABOVE CEMENTED SEAL: 1 .02 ft
CEMENTED INTERVAL: 0-10 ft
OBSERVATION WELL NO. : 60 DISTANCE TO OBSERVATION WELL: 50 ft
TOTAL PUMPING TIME: = 95 min
WATER METER READING:tp END = 4759.5 gal
START = 4690.9 gal
AVERAGE DISCHARGE OVER PUMPING PERIOD: 0.72 gpm = 0.1 ft3/min
Time Depth to Drawdown
min Water ft
ft
2 40.25 0.04
7 40.28 0.07
15 40.28 0.07
20 40.33 0.12
27 40.34 0.125
37 40.24 -0.031
40 40.24 -0.031
49 40.41 0.203
60 40.46 0.250
83 40.60 0.39
98 40.72 0.51
Pump .shut off - Start recovery
test
102 40.72 0.51
106 40.71 0.50
115 40.65 0.44
126 40.59 0.38
143 40.78 0.57
169 40.81 0.60
191 40.81 0.60
228 40.84 0.63
265 40.82 0.61
289 40.82 0.61
88
TYPE OF TEST: DRAWDOWN/PECOVERY
PUMPING WELL NO. : 61
CASING DIAMETER: 0.17 ft TOTAL DEPTH: 118 ft HOLE DIAMETER: 0.4 ft
SCREENED INTERVAL: 108.5-118 ft TYPE OF AQUIFER: confined (coal
STATIC WATER LEVEL: 40.41 ft TOP OF CASING ABOVE GROUND SURFACE: 1 .05 ft
CEMENTED INTERVAL: 0-10 ft
OBSERVATION WELL NO. : 62 DISTANCE TO OBSERVATION WELL: 50 ft
. TOTAL PUMPING TIME: tp= 95 min
WATER METER READING: END = 4759.5 gal
START = 4690.9 gal
AVERAGE DISCHARGE OVER PUMPING PERIOD: 0.72 gpm = 0.1 ft3/min
Time Depth to Drawdown
min Water ft
ft
5 40.28 -0.13
10 40.30 -0.11
17 40.30 -0.11
24 40.33 -0.08
31 40.34 -0.07
39 40.36 -0.05
45 40.40 -0.01
58 40.44 0.03
66 40.47 0.06
85 40.58 0.17
100 40.63 0.22
Pump shut off at 95 min,
Start of recovery test
108 40.59 0. 18
122 40.70 0.29
128 40.72 0.31
146 40.76 0.35
171 40.76 0.35
194 40.79 0.38
234 40.77 0. 35
267 40.76 0.35
291 40.77 0.36
89
8/29/78
TYPE OF TEST: SPECIFIC CAPACITY/RECOVERY
PUMPING WELL NO, : 117
CASING DIAMETER: 0.42 ft TOTAL DEPTH: 142 ft HOLE DIAMETER: 0.66 ft
SCREENED INTERVAL: 102-142 ft TYPE OF AQUIFER: overburden —
STATIC WATER LEVEL: 22 ft
CEMENTED INTERVAL: 0-10 ft
OBSERVATION WELL NO. : 117
TOTAL PUMPING TIME: tp=145 min
WATER METER READING: END = 5316.9 gal
START = 5158.6 gal
AVERAGE DISCHARGE OVER PUMPING PERIOD: 1 .09 gpm = 0.146 ft3/min
Time Depth to Drawdown Temp pH Spec.Res. EC@T EC@25°C
Min Wfer ft °C ohm-cm mmhos/cm mmhos/cm
0 20.85 -1 .15
1 22.79 0.79
2 24.48 2.48
3 25.42 3.42
5 28.00 6.00 15.5 159 6.29 7.84
7 29.79 7.79
9 31 .10 9.10
}'O 31 .54 9.54
12 32.63 10.63
15 33.98 11 .98
18 35.00 13.00
21 36.06 14.06
25 37.29 15.29 16.5 150 6.67 8.01
30 38.46 16.46
36 39.55 17.55
40 40.00 18.00 @ 41 min 17 155 6.45 7.67
50 41 .00 19.00
60 41 .88 19.88 @ 65 min 17 6.9 142 7.04 8.37
75 43.10 21 .10 @ 88 min 16.5 140 7.14 8.57
90 43.67 21 .67 @101 min 17 6.8 150 6.67 7.93
105 43.98 21 .98 @128 min 17 154 6.49 7.72
135 44. 90 22.90 @143 min 17 6.8 139 7 .19 8.59
145 pump shut off-start recovery
90
8/29/78 (cont'd)
Depth to
' Time Water Drawdown t/t-t
Min ft ft
146 44.17 22. 17 146
147 43.29 21 .29 73.5
148 42.33 20.33 49.33
150 40.75 18.75 30.00
152 39.46 17.46 21 .71
154 38.27 16.27 17.11
157 36.75 14.75 13.08
160 35. 65 13.65 10.67
162 34.81 12.81 9.53
165 33.79 11 .79 8.25
170 32.54 10.54 6.80
175 31 .38 9.38 5 .83
180 30.58 8.58 5.14
195 28.79 6.79 3.90
210 27.54 5.54 3.23
225 26.71 4.71 2.81
91
8/29/78
TYPE OF TEST: DRAWDOWN
PUMPING WELL NO. : •117
CASING DIAMETER: 0.17 ft TOTAL DEPTH: 142 ft HOLE DIAMETER: 0.40 ft
SCREENED INTERVAL: 52-142 ft TYPE OF AQUIFER: overburden
STATIC WATER LEVEL: 24.06 ft
CEMENTED INTERVAL: 0-10 ft
OBSERVATION WELL NO: 118 DISTANCE TO OBSERVATION WELL: 50 ft
TOTAL PUMPING TIME: tp = 145 min
WATER METER RE-DING: END = 5316.9 gal
START = 5158.6 gal
AVERAGE DISCHARGE OVER PUMPING PERIOD: 1 .09 gpm = 0.146 ft3/min
Time Depth to Drawdown
min Water ft
ft
23 24.07 0.01
32 24.13 0.07
43 24.20 0.14
51 24.25 0.19
63 24.30 0.24
68 24.34 0.28
82 24.42 0.36
92 24.49 0.43
109 24.62 0.56
123 24.66 0.60
92
8/29/78
TYPE OF TEST: DRAWDOWN
PUMPING WELL NO. : 117
CASING DIAMETER: 077 ft TOTAL DEPTH: 142 ft HOLE DIAMETER: 0.40 ft
SCREENED INTERVAL: 82-142 ft TYPE OF AQUIFER: overburden
STATIC WATER LEVEL: 22.22 ft
CEMENTED INTERVAL: 0-10 ft
OBSERVATION WELL NO. : 119 DISTANCE TO OBSERVATION WELL: 50 ft
TOTAL PUMPING TIME: tp=145 min
WATER METER READING: END = 5316.9 gal
START = 5158.6 gal
AVERAGE DISCHARGE OVER PUMPING PERIOD: 1 .09 gpm = 0. 146 ft3/min
Time Depth to Drawdown
min Water ft
ft
21 22.49 0.27
34 23.05 0.83
41 23.46 1 .24
51 24.15 1 .93
61 24.60 2.38
71 25.12 2.90
80 25.59 3.37
94 26.34 4. 12
107 26.81 4.59
126 27.42 5.20
93
TYPE OF TEST: SLUG
WELL NO. : 116
CASING DIAMETER: 0.42 ft TOTAL DEPTH: 168 ft HOLE DIAMETER: 0.66 ft
SCREENED INTERVAL: TYPE OF AQUIFER: confined (coal ) _
STATIC WATER LEVEL: 49.71 ft TOP OF CASING ABOVE GROUND SURFACE:
REFERENCE POINT FOR MEASUREMENTS: Top of casing
CEMENTED INTERVAL: 0-10 ft
VOLUME SLUG: 0.52 ft3
Depth to
Time Drawdown lit
min Wafter ft min-1
1 45.93 3.77 1 .00
2 45.98 3.73 0.50
5 46.00 3.71 0.20
7 46.06 3.65 0. 143
10 46.10 3.60 0.100
15 46.20 3.51 0.067
25 46.38 3.33 0.040
40 46.56 3.15 0.025
55 46.75 2. 96 0.018
75 47.04 2.67 0.013
90 47.21 2.50 0.011
105 47.38 2.34 0.010 _
120 47.63 2.09 0.008
125.5 47.60 2.11 0.008
94
8/30/78
TYPE OF TEST: SLUG
WELL NO. : 122(Ennis Draw GWOW)
CASING DIAMETER: 0.417 ft TOTAL DEPTH: 57 ft HOLE DIAMETER: 0.66 ft
SCREENED INTERVAL: 10-57 ft TYPE OF AQUIFER: overburden ( Ennis Draw) —
STATIC WATER LEVEL: 15.88 ft
CEMENTED INTERVAL: 0-10 ft
VOLUME SLUG: 0.52 ft3
•
Depth to
Time Drawdown 1/t
min Wfer ft min-I
0.5 15.73 -0.15 2
1 15.77 -0. 11 1
2 15.82 -0.06 0.5
3 15.82 -0.06 0.333
4 15.83 -0.05 0.25
5 15.84 -0.04 0.2
8 15.84 -0.04 0.125
15 15.85 -0.03 0.067
21 15.86 -0.02 0.048
95
9/1/78
TYPE OF TEST: SPECIFIC CAPACITY/RECOVERY
PUMPING WELL NO. : 137
CASING DIAMETER: 0.417 ft TOTAL DEPTH: 143 ft HOLE DIAMETER: 0.66 ft
SCREENED INTERVAL: 132-143 ft TYPE OF AQUIFER: coal
STATIC WATER LEVEL: 81 .65 ft
CEMENTED INTERVAL: 0-10 ft
OBSERVATION WELL NO. : 137
TOTAL PUMPING TIME: tp 35.5 min
WATER METER READING: END = 5336.2 gal
START = 5307.0 gal
AVERAGE DISCHARGE OVER PUMPING PERIOD: 0.823 gpm = 0.11 ft3/min
(Note: No response observed in observation wells 134 and 138. )
Time Depth to Drawdown Cum. Temp pH Spec.Res. EC@T EC@25°C
Min Water ft pumped °C ohm-cm mmhos/cm mmhos/cm
ft meter
ft3
0.5 83.02 1 .37
1 .0 85.59 3.94
1 .5 - -
2.0 86.11 4.46 "
2.5 86.97 5.32 F
3.0- 87. 56 5.91 E
3.5 88.41 6.76 `2
4 88.79 7.14 -,
5 89.68 8.03 e
6 90. 50 8.85 an
7 91 .75 10.10 p_ v
8 92.84 11 .19 sS v
9 93.82 12.17 -
10 95.06 13.41 rn o
11 96.40 14.75
12 96.80 15.15 fd
13 96.41 14.76
14 96.41 14.76 a
15 96.41 14.76
16 96.41 14.76 ci
18 96.41 14.76 (flow increased)
19 102.79 21 .14
20 103.80 22.15
21 104.72 23.07 (Ave. pumping rate b/w, t=18 m and t=35.5 m,
23 106.48 24.83 is approximately 0.096 ft3/min)
24 107.01 25.36
26 108.73 27.08
28 110. 14 28.49
30 111 .56 29.91 19 8.6 206 4.85 5.52
32 112.94 31 .29
34 114.22 32.57
96
9/1/78 (cont'd)
Recovery Test on Well No. 137
Depth to
Time Drawdown t/t-t
Min Water ft -
ft
36 114.36 32.71 72
37 114.42 32.77 24.67
38 114.47 32.82 15.20
42 114.13 32.48 6.46
43 114.66 33.01 5.73
44 114.21 32.56 5. 18
45 114.27 32.62 4.74
46 114.09 32.44 4.38
48 114.02 32.37 3.84
50 114.03 32.38 3.45
53 114.06 32.41 3.03
55 113.96 32.31 2.82
57 113.88 32.23 2.65
59 113.78 32.13 2.51
60 113.74 32.09 2.45
62 113.65 32.00 2.34
64 113.56 31 .91 2.25
66 113.48 31 .83 2.16
68 113.47 31 .82 2.09
69 113.34 31 .69 2.06
70 113.29 31 .64 2.03
75 113.09 31 .44 1 .90
80 112.84 31 . 19 1 .80
85 112.68 31 .03 1 .72
90 112.46 30.81 1 .65
95 112.17 30.52 1 .60
100 112.05 30.40 1 .55
105 111 .85 30.20 1 . 51
115 111 .47 29.82 1 .45
116 111 .43 29.78 1 .44
125 111 .08 29.43 1 .40
135 110.70 29.05 1 .36
97
9/1/78
TYPE OF TEST: SPECIFIC CAPACITY/RECOVERY
PUMPING WELL NO. : 172
CASING DIAMETER: 0.42 ft TOTAL DEPTH: 62 ft HOLE DIAMETER: 0.66 ft
SCREENED INTERVAL: 32-62 ft TYPE OF AQUIFER: overburden _
STATIC WATER LEVEL: 37.55 ft
CEMENTED INTERVAL: 0-10 ft
OBSERVATION WELL NO. : 172
TOTAL PUMPING TIME: tp—;-22 min
WATER METER READING: END = 5362.3 gal
START = 5337.6 gal
AVERAGE DISCHARGE OVER PUMPING PERIOD: 1 .12 gpm = 0.15 ft3/min
(Note: No response was observed in observation wells 173 and 174.)
Time Depth to Drawdown Temp pH Spec.Res. EC@T EC@25°C
Min Wafter ft °C ohm-cm mmhos/cm mmhos/cm
0.5 34.44 -3.11
1 .0 - -
1 .5 - -
2 38.29 0.74
3 38.64 1 .09
4 38.97 1 .42
5 39.49 1 . 94
6 39.85 2.30
7 40.01 2.46
8 40.46 2.91
9 40.70 3.15
10 41 .04 3.49
11 41 . 28 3.73
12 41 .69 4.14
13 41 . 95 4.40
14 42.04 4.49
15 42.39 4.84
16 42.67 5.12
17 42.85 5.30
18 43. 18 5.63 18 6.7 160 6.25 7.27
21 44.00 6.45
98
RECOVERY TEST ON WELL NO. 172
• Time Depth to Drawdown t/t-tp
Min Wf ter ft
t
24 41 . 54 3.99 120
25 40.75 3.20 8.33
26 40.22 2.67 6.50
27 40.07 2.52 5.40
28 39.87 2.32 4.67
29 39.64 2.09 4.14
30 39.46 1 .91 3.75
31 39.40 1 .85 3.44
32 39.21 1 .66 3.20
33 39.11 1 .56 3.00
34 39.02 1 .47 2.83
36 38.91 1 .36 2.57
38 38.83 1 .28 2.38
40 38.75 1 .20 2.22
42 38.60 1 .05 2. 10
44 38.64 1 .09 2.00
46 38.60 1 .05 1 .92
48 38.56 1 .01 1 .85
50 38.54 0.99 1 .79
55 38.44 0.89 1 .67
60 38.38 0.83 1 .58
65 38.34 0.79 1 .51
70 38.30 0.75 1 .46
75 38. 26 0.71 1 .42
85 38.21 0.66 1 .35
99
•
APPENDIX D _
APPROXIMATE LOCATION OF EXISTING WELLS
(study area indicated)
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APPENDIX B
L
LETTERS OF COMMENT
CP C cultural resource consultants inc.
FLOYD PATTERSON
Director
November 10, 1978
Mr. Michael Wallace
Environmental Administrator
Coors Industry Inc .
Mail 327
Golden, Colorado 80401
Dear Mr. Wallace:
On October 31, 1978, Cultural Resource Consultants Inc .
contracted with the Coors Industry Inc. , to provide a
cultural resource survey of the site of a proposed coal
mining operation in Weld County, Colorado. The work was
performed under Purchase Order No. 20884 J 40890, and
Colorado State Antiquities Permit No. 78-6.
The purpose of the survey was to ensure compliance of
the project with all relevant Federal and State laws
concerning archaeological and historic sites , including
the State Antiquities Act of 1973 (CRS 1973, 24-80-401 to
410) , the State Register of Historic Places Act of 1975
(CRS 1973, 24-80. 1-101 to 102) , the National Historic
Preservation Act of 1966, as amended, and 36CFR800. This
letter and accompanying material will serve as our final
report.
The research design consisted of a literature search
supplemented by on site inspection by archaeologists of
all ground to be disturbed by the proposed mining activities .
The National Register of Historic Places was consulted as
well as the Inventories of Historic and Archaeological Sites
maintained by the Colorado State Historic Preservation Officer.
8614 YUKON STREET,SUITE 301C ARVADA,COLORADO 80005 (303) 422-3553
-2-
All such sites were to be recorded. Floyd Patterson, Ph.D.
served as Principal Investigator, performed the historical
research, and administered the project. Robert Williams
supervised the archaeological field work, assisted by Kirk
Butterbaugh. Field work was performed November 1-6, 1978 .
The proposed mining operation is to take place in south-central
Weld County, Township 3N, Range 64W, S 4/5 Sec . 25, Sec . 26,
NE Sec. 35, and Sec. 36. The project area was surveyed on
foot, generally in thirty meter transects . Some areas were
inspected more intensively, in particular 'blowouts , ' ridge-
lines and all areas of high erosion or high ground visibility.
Topographically the project area lies in the Great Plains between
4800 and 4900 feet elevation; it is generally quite flat but
includes some areas of gentle sand hills . Subsurface water
is indicated by numerous windmill-driven pumps in the area .
The nearest surface water supply is Box Elder Creek, approxi-
mately four miles to the west. It is a seasonal stream and
was dry at the time of survey. No evidence was noted of any
water erosion effects on the ground surface. At the time of
survey the project area was free of any standing or flowing
water, stream beds, or gullies. Wind erosion, however, is
clearly present in the form of sand dunes and 'blowouts , '
depressed areas where the surface has lowered by erosion.
Ground cover consists largely of sagebrush (Artemisia) , and
tumbleweed (Cycloloma Atriplicifolium) , with some cactus
(Opuntia) and grasses. Ground visibility averages about 507,
varying from about 20% in some grassy areas to 100% in eroded
areas . The surface is a fine, readily wind blown sand.
No sites are recorded for the project area in the State
Inventories of Archaeological and Historic Sites , or in the
National Register of Historic Places . No evidence of cultural
resources was observed during the field survey. Extensive
signs of recent human activity were noted, in particular, wind-
mills , water tanks, fences, roads and cattle herds . These were
judged to be of no significance due to their modern construction.
This lack of prehistoric materials contrasts with some areas of
Weld County, such as the Pawnee Grassland area, where sites
are relatively common. It is likely that in aboriginal times
the Project Area was as unsuitable for occupation as it is
now, offering neither cover, water, nor stable food resources .
It may have been exploited seasonally in the pursuit of game,
but no surface indication of such use remains .
-3-
Subsurface disturbance may, of course, uncover archaeological
or historic materials . In this case the operator should at
once suspend operations and notify the office of the State
Archaeologist of Colorado. Further archaeological work might
then be required to comply with Federal and State antiquity
laws .
If you have any questions, feel free to contact me . Thank you
for the opportunity to undertake this project.
Sind
/7-
yd atterson, PH.D.
Director
STATE OF COLORADO
Richard D.Lamm,Governor
DEPARTMENT OF NATURAL RESOURCES CAM%
DIVISION OF WILDLIFE O.
Jack R. Oriel', Director , - i
�
6060 Broadway p
Denver, Colorado 80216 825-1192) Y' OF
October 6, 1978
Mr. Paul Adams, Environmental Engineer
Adolph Coors Company
Golden, CO 80401
Dear Paul:
I have reviewed your preliminary Keensburg coal mining proposal
with appropriate Division of Wildlife personnel. We are impressed
with the project and feel that you will have very little impact on the
area's wildlife.
Your test plots for reclamation seem to be proceeding well and this,
coupled with the fact that only a small area will be disturbed at any
one time, greatly reduces any impact on wildlife species. As we
discussed, the area has been badly overgrazed in past years, and
you should actually improve the existing habitat with your proposed
plan.
Please let me know if I can be of any assistance in the future and
keep us informed of your progress.
Yours truly,
Allen Whitaker
Wildlife Environmentalist
AW:dh
cc: Don Bogart
DEPARTMENT OF NATURAL RESOURCES, Harris Sherman, Executive Director • WILDLIFE COMMISSION, Sam Caudill, Chairman
Michael Higbee, Vice Chairman • Jay K.Childress, Secretary • Jean K.Tool,Member • Vernon C.Williams,Member
Thomas Farley, Member • Roger Clark, Member • Wilbur Redden,Member
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