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USGS
Water Resources of Colorado

EAGLE RIVER WATERSHED SNOWMELT RUNOFF SAMPLING

(Eagle River Watershed Retrospective Assessment Program)

A network of surface water-quality sites has been established in the Eagle River watershed as an aid in determining long-term trends. In water year 2003, the Eagle River Watershed Retrospective Assessment Program conducted a major ion and trace element sampling program during April-June 2003. Samples were collected to investigate natural and human factors influencing water-quality conditions during snowmelt runoff. Additional water-quality data for sites 09064600 Eagle River near Minturn, CO, and 09067005 Eagle River at Avon, CO, are published elsewhere in this report.

REMARKS.--The following remark codes may appear in the data tables below: e, estimated; E, estimated laboratory analysis value; M, presence of material verified but not quantified.

WATER-QUALITY RECORDS
WATER-QUALITY DATA, WATER YEAR OCTOBER 2002 TO SEPTEMBER 2003
Station number
Station name
Date
Time
Instan-
taneous
dis-
charge,
cfs
(00061)
Turbid-
ity,
wat unf
lab,
Hach
2100AN
NTU
(99872)
Dis-
solved
oxygen,
mg/L
(00300)
pH,
water,
unfltrd
field,
std
units
(00400)
04-23-03
1325
103
2.8
10.1
8.5
05-01-03
1225
158
7.5
9.7
8.1
05-06-03
1245
133
2.3
8.8
8.3
05-14-03
1020
182
3.7
8.5
8.2
05-21-03
1615
368
4.7
8.0
8.1
05-29-03
1225
1,210
9.3
8.7
8.0
06-04-03
1125
759
6.0
9.1
8.2
06-12-03
0927
e435
2.4
9.4
8.1
06-26-03
0945
211
1.2
8.6
8.4
04-23-03
1645
113
3.6
10.0
7.6
05-01-03
1545
191
5.2
8.9
7.9
05-06-03
1000
137
3.5
9.7
8.0
05-14-03
1350
202
4.6
8.5
7.9
05-21-03
1335
397
10
8.6
7.8
05-28-03
1550
832
9.7
--
7.9
06-03-03
0940
748
7.2
8.8
8.1
06-11-03
1212
505
1.7
8.6
8.1
06-26-03
1300
253
<1.0
9.4
8.3
04-24-03
0910
150
6.8
10.7
7.9
05-02-03
1035
261
3.4
10.0
8.1
05-07-03
0830
193
2.8
9.6
8.1
05-13-03
1439
e285
3.1
8.7
8.1
05-21-03
1030
772
6.5
10.3
7.8
05-28-03
1145
2,180
11
8.9
8.1
06-03-03
1310
1,910
7.3
8.7
7.8
06-11-03
1535
931
1.4
8.6
8.1
06-26-03
1405
476
<1.0
8.4
8.3
04-24-03
1135
225
6.3
10.7
8.0
05-02-03
1425
362
5.4
9.2
8.2
05-07-03
1048
301
2.5
9.4
8.3
05-13-03
1025
399
4.3
9.3
8.3
05-21-03
1130
1,240
5.4
9.9
8.1
05-28-03
1410
2,910
15
8.7
7.8
06-04-03
1030
2,560
11
9.5
7.9

WATER-QUALITY DATA, WATER YEAR OCTOBER 2002 TO SEPTEMBER 2003
Station number
Date
Specif.
conduc-
tance,
wat unf
uS/cm
25 degC
(00095)
Temper-
ature,
water,
deg C
(00010)
Hard-
ness,
water,
unfltrd
mg/L as
CaCO3
(00900)
Calcium
water,
fltrd,
mg/L
(00915)
Magnes-
ium,
water,
fltrd,
mg/L
(00925)
Potas-
sium,
water,
fltrd,
mg/L
(00935)
Sodium
adsorp-
tion
ratio
(00931)
Sodium,
water,
fltrd,
mg/L
(00930)
Alka-
linity,
wat flt
inc tit
field,
mg/L as
CaCO3
(39086)
Bicar-
bonate,
wat flt
incrm.
titr.,
field,
mg/L
(00453)
Carbon-
ate,
wat flt
incrm.
titr.,
field,
mg/L
(00452)
04-23-03
107
2.1
49
11.8
4.73
0.75
0.1
2.36
44
53
--
05-01-03
124
3.2
55
13.4
5.35
0.85
0.1
2.34
50
61
--
05-06-03
134
5.7
62
15.0
6.08
0.83
0.1
2.40
64
78
--
05-14-03
114
6.5
54
12.9
5.18
0.75
0.1
2.06
44
54
--
05-21-03
125
10.5
61
14.8
5.74
0.72
0.1
1.69
58
71
--
05-29-03
94
8.5
42
10.3
4.02
0.55
0.1
1.10
40
49
--
06-04-03
118
7.0
63
15.8
5.64
0.71
0.1
1.22
55
67
--
06-12-03
127
5.5
68
17.5
6.03
0.65
0.1
1.38
54
66
--
06-26-03
147
7.4
79
20.4
6.80
0.62
0.1
1.43
70
85
--
04-23-03
127
1.4
56
13.1
5.77
0.77
0.1
2.46
40
49
--
05-01-03
136
5.6
57
13.5
5.74
0.80
0.1
2.29
47
57
--
05-06-03
152
3.0
69
16.0
6.93
0.80
0.1
2.44
49
60
--
05-14-03
123
7.9
56
13.2
5.56
0.83
0.1
2.09
42
51
--
05-21-03
117
8.0
54
13.1
5.24
0.68
0.1
1.60
50
61
--
05-28-03
88
10.5
42
10.4
3.83
0.55
0.1
1.16
36
44
--
06-03-03
101
5.0
55
13.7
4.95
0.63
0.1
1.20
43
52
--
06-11-03
114
7.5
61
15.4
5.42
0.63
0.1
1.29
51
62
--
06-26-03
137
9.7
68
17.6
5.86
0.56
0.1
1.27
61
74
--
04-24-03
175
0.2
79
18.7
7.95
0.77
0.2
3.43
49
60
--
05-02-03
166
3.4
73
17.7
6.92
0.82
0.1
2.78
--
--
--
05-07-03
163
3.1
75
18.1
7.14
0.76
0.1
2.58
62
76
--
05-13-03
149
8.4
66
16.2
6.15
0.74
0.1
2.48
51
62
--
05-21-03
106
4.2
53
13.5
4.71
0.61
0.1
1.53
47
57
--
05-28-03
75
7.0
36
9.50
3.02
0.49
0.1
1.00
30
37
--
06-03-03
96
8.8
49
12.9
4.09
0.60
0.1
1.10
41
50
--
06-11-03
102
9.8
52
13.8
4.33
0.49
0.1
1.28
42
52
--
06-26-03
119
11.6
60
16.0
4.95
0.53
0.1
1.40
46
57
--
04-24-03
240
0.7
100
28.5
8.03
0.93
0.3
6.18
62
75
--
05-02-03
221
5.6
94
25.9
7.15
0.87
0.2
4.90
68
78
2
05-07-03
233
5.0
100
27.7
7.56
0.87
0.2
5.15
74
90
--
05-13-03
207
5.8
91
25.1
6.73
0.86
0.2
4.59
58
70
--
05-21-03
128
5.8
--
4.43
0.62
2.45
46
56
--
05-28-03
93
8.7
41
11.4
2.96
0.57
0.1
1.50
36
43
--
06-04-03
105
5.3
50
14.2
3.41
0.60
0.1
1.62
42
51
--
WATER-QUALITY DATA, WATER YEAR OCTOBER 2002 TO SEPTEMBER 2003
Station number
Date
Chlor-
ide,
water,
fltrd,
mg/L
(00940)
Fluor-
ide,
water,
fltrd,
mg/L
(00950)
Silica,
water,
fltrd,
mg/L
(00955)
Sulfate
water,
fltrd,
mg/L
(00945)
Residue
water,
fltrd,
sum of
consti-
tuents
mg/L
(70301)
Residue
water,
fltrd,
tons/
acre-ft
(70303)
Residue
water,
fltrd,
tons/d
(70302)
Alum-
inum,
water,
fltrd,
ug/L
(01106)
Arsenic
water,
fltrd,
ug/L
(01000)
Cadmium
water,
fltrd,
ug/L
(01025)
Chrom-
ium,
water,
fltrd,
ug/L
(01030)
04-23-03
2.73
<0.17
6.90
5.3
61
0.08
16.9
19
<0.3
<0.04
<0.8
05-01-03
3.02
<0.17
7.23
5.7
68
0.09
29.1
18
E.2
<0.04
<0.8
05-06-03
2.73
<0.17
7.04
6.3
79
0.11
28.3
16
E.2
<0.04
<0.8
05-14-03
2.22
<0.2
6.53
5.8
62
0.08
30.5
16
E.2
<0.04
<0.8
05-21-03
1.21
<0.2
6.43
5.3
71
0.10
70.3
24
E.2
<0.04
<0.8
05-29-03
0.62
<0.2
5.19
3.6
50
0.07
162
34
E.2
<0.04
--
06-04-03
0.67
<0.2
5.85
5.0
68
0.09
139
36
E.2
<0.04
--
06-12-03
0.60
<0.2
5.78
5.5
70
0.09
--
16
E.2
<0.04
--
06-26-03
0.55
<0.2
5.85
5.8
83
0.11
47.6
10
<0.3
<0.04
--
04-23-03
2.99
<0.17
7.15
16.0
73
0.10
22.3
71
E.2
0.94
<0.8
05-01-03
2.86
<0.17
7.40
13.3
75
0.10
38.5
64
E.2
0.71
<0.8
05-06-03
2.80
<0.17
7.39
15.9
82
0.11
30.5
61
E.2
0.78
<0.8
05-14-03
2.15
<0.2
6.81
11.2
68
0.09
36.8
54
E.2
0.46
<0.8
05-21-03
1.14
<0.2
6.57
7.9
66
0.09
71.2
54
E.2
0.24
<0.8
05-28-03
0.66
<0.2
5.31
5.0
49
0.07
110
39
E.2
0.15
--
06-03-03
0.60
<0.2
6.05
5.2
58
0.08
118
40
E.2
0.15
--
06-11-03
1.23
<0.2
5.75
6.4
67
0.09
90.9
27
<0.3
0.12
--
06-26-03
0.48
<0.2
5.59
7.2
75
0.10
51.3
18
E.2
0.13
--
04-24-03
3.59
<0.17
7.11
28.3
100
0.14
40.6
38
E.2
0.66
<0.8
05-02-03
2.87
<0.17
7.32
19.6
92
0.13
65.0
44
E.2
0.44
<0.8
05-07-03
2.85
<0.17
7.06
16.8
93
0.13
48.5
44
E.2
0.48
<0.8
05-13-03
2.27
<0.2
6.63
17.1
83
0.11
--
38
E.2
0.29
<0.8
05-21-03
0.89
<0.2
6.09
9.0
65
0.09
135
48
E.2
0.15
<0.8
05-28-03
0.48
<0.2
4.78
5.3
43
0.06
254
50
E.2
0.08
--
06-03-03
0.49
<0.2
5.59
5.8
55
0.08
285
39
E.2
0.09
--
06-11-03
0.50
<0.2
5.32
7.8
59
0.08
149
32
E.1
0.08
--
06-26-03
0.50
<0.2
5.15
10.4
67
0.09
86.1
20
E.2
0.07
--
04-24-03
11.4
<0.17
6.39
30.6
130
0.18
78.7
28
E.1
0.33
<0.8
05-02-03
8.04
<0.17
6.71
22.0
117
0.16
114
31
E.2
0.24
<0.8
05-07-03
10.2
<0.17
6.31
22.2
125
0.17
101
28
E.2
0.27
<0.8
05-13-03
8.72
<0.2
5.87
19.4
106
0.14
114
25
E.2
0.20
<0.8
05-21-03
3.49
<0.2
5.90
8.8
86
E.2
0.08
0.8
05-28-03
1.93
<0.2
4.68
5.3
50
0.07
392
41
E.2
0.04
--
06-04-03
2.03
<0.2
5.26
6.0
59
0.08
406
32
E.1
0.04
--
WATER-QUALITY DATA, WATER YEAR OCTOBER 2002 TO SEPTEMBER 2003
Station number
Date
Copper,
water,
fltrd,
ug/L
(01040)
Iron,
water,
fltrd,
ug/L
(01046)
Iron,
water,
unfltrd
recover
-able,
ug/L
(01045)
Lead,
water,
fltrd,
ug/L
(01049)
Mangan-
ese,
water,
fltrd,
ug/L
(01056)
Mangan-
ese,
water,
unfltrd
recover
-able,
ug/L
(01055)
Nickel,
water,
fltrd,
ug/L
(01065)
Silver,
water,
fltrd,
ug/L
(01075)
Zinc,
water,
fltrd,
ug/L
(01090)
Zinc,
water,
unfltrd
recover
-able,
ug/L
(01092)
04-23-03
--
165
360
E.07
19.9
27
0.53
<0.2
1
3
05-01-03
--
98
360
E.04
14.4
25
0.79
<0.2
1
3
05-06-03
--
131
300
E.08
16.2
20
0.60
<0.2
1
2
05-14-03
--
125
400
0.09
14.4
26
0.81
<0.2
M
3
05-21-03
--
78
370
0.09
10.5
26
0.82
<0.2
2
3
05-29-03
1.0
54
--
--
10.7
--
--
--
M
--
06-04-03
0.8
72
--
--
10.0
--
--
--
1
--
06-12-03
0.7
72
--
--
10.1
--
--
--
1
--
06-26-03
0.6
97
--
--
14.7
--
--
--
M
--
04-23-03
--
340
310
0.84
200
190
1.01
<0.2
327
311
05-01-03
--
211
800
0.48
140
177
0.88
<0.2
207
251
05-06-03
--
292
680
0.50
180
178
1.01
<0.2
254
279
05-14-03
--
238
670
0.47
106
116
1.07
<0.2
140
175
05-21-03
--
133
490
0.39
57.7
79
0.90
<0.2
70
91
05-28-03
2.7
64
--
--
29.3
--
--
--
37
--
06-03-03
2.3
95
--
--
29.1
--
--
--
38
--
06-11-03
1.8
111
--
--
33.9
--
--
--
34
--
06-26-03
1.8
154
--
--
57.5
--
--
--
41
--
04-24-03
--
211
1,490
0.43
224
746
1.11
<0.2
273
547
05-02-03
--
164
540
0.35
107
122
0.88
<0.2
147
171
05-07-03
--
239
520
0.41
130
126
0.94
<0.2
167
188
05-13-03
--
170
530
0.30
79.3
94
1.09
<0.2
90
127
05-21-03
--
99
450
0.29
34.2
181
0.89
<0.2
46
108
05-28-03
2.5
74
--
--
19.9
--
--
--
23
--
06-03-03
2.2
60
--
--
18.0
--
--
--
19
--
06-11-03
2.0
74
--
--
20.7
--
--
--
20
--
06-26-03
1.8
101
--
--
40.3
--
--
--
21
--
04-24-03
--
138
690
0.37
115
256
1.09
<0.2
138
230
05-02-03
--
91
400
0.18
58.5
80
0.82
<0.2
72
101
05-07-03
--
123
360
0.23
71.5
79
0.94
<0.2
92
112
05-13-03
--
118
420
0.22
50.1
75
1.32
<0.2
64
100
05-21-03
--
86
420
0.40
19.5
59
1.61
<0.2
29
43
05-28-03
1.8
45
--
--
13.9
--
--
--
12
--
06-04-03
1.4
39
--
<1
10.3
60.2
--
<0.3
11
--

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Water Resources of Colorado
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