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USGS
Water Resources of Colorado

PLATTE RIVER BASIN

403147105083800 HORSETOOTH RESERVOIR NEAR SPRING CANYON DAM NEAR FORT COLLINS, CO

WATER-QUALITY RECORDS

PERIOD OF RECORD.--May 1983 to current year. For a complete listing of historical data available for this site, see http://waterdata.usgs.gov/co/nwis/inventory/?site_no=403147105083800

REMARKS.--Samples collected near the south end of reservoir near Spring Canyon Dam.

WATER-QUALITY DATA, WATER YEAR OCTOBER 2002 TO SEPTEMBER 2003
Date
Time
Sam-
pling
depth,
feet
(00003)
Dis-
solved
oxygen,
mg/L
(00300)
pH,
water,
unfltrd
field,
std
units
(00400)
Specif.
conduc-
tance,
wat unf
uS/cm
25 degC
(00095)
Temper-
ature,
water,
deg C
(00010)
MAY
15...
1117
0.50
8.1
7.3
82
12.8
15...
1118
5.00
8.1
7.3
81
11.9
15...
1119
10.0
8.1
7.2
80
11.2
15...
1120
15.0
8.0
7.2
78
10.8
15...
1121
20.0
8.0
7.2
77
10.5
15...
1122
25.0
7.9
7.1
77
10.2
15...
1123
30.0
7.8
7.1
76
9.9
15...
1124
35.0
7.6
7.1
76
9.7
15...
1125
40.0
7.5
7.1
75
9.3
15...
1126
45.0
7.6
7.0
74
8.9
15...
1127
50.0
7.4
6.9
73
8.6
15...
1128
55.0
7.4
6.9
71
8.1
15...
1129
60.0
7.3
6.9
71
7.7
15...
1130
65.0
7.1
6.9
70
7.5
15...
1131
70.0
7.0
6.9
71
7.5
15...
1132
75.0
6.7
6.8
71
7.4
AUG
27...
1055
0.50
7.7
7.8
44
21.8
27...
1056
5.00
7.6
7.8
44
21.2
27...
1057
10.0
6.6
7.7
42
20.6
27...
1058
15.0
6.8
7.5
39
19.5
27...
1059
20.0
6.7
7.4
38
18.9
27...
1100
25.0
6.7
7.4
38
18.6
27...
1101
30.0
6.8
7.3
38
18.4
27...
1102
35.0
6.5
7.3
39
17.7
27...
1103
40.0
2.6
7.2
59
12.3
27...
1104
45.0
2.3
7.0
64
10.6
27...
1105
50.0
1.7
7.0
67
9.7
27...
1106
55.0
1.3
6.9
68
9.3
27...
1107
60.0
1.4
6.9
69
9.1
27...
1108
65.0
0.7
6.9
70
9.0
27...
1109
70.0
0.4
6.8
71
8.8
27...
1110
75.0
0.2
6.8
73
8.6
27...
1111
80.0
0.1
6.8
73
8.6
27...
1112
85.0
0.1
6.8
74
8.6

WATER-QUALITY DATA, WATER YEAR OCTOBER 2002 TO SEPTEMBER 2003
Date
Time
Sam-
pling
depth,
feet
(00003)
Trans-
parency
Secchi
disc,
inches
(00077)
Dis-
solved
oxygen,
mg/L
(00300)
pH,
water,
unfltrd
field,
std
units
(00400)
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)
MAY
15...
1140
0.10
84.0
8.1
7.3
82
12.8
34
10.4
1.95
0.99
0.3
3.60
15...
1150
75.0
--
6.7
6.8
71
7.4
31
9.78
1.68
0.86
0.2
2.85
AUG
27...
1115
0.10
48.0
7.7
7.8
44
21.8
23
7.08
1.25
0.68
0.2
1.99
27...
1130
85.0
--
0.1
6.8
74
8.6
37
11.3
2.06
0.96
0.2
3.10

WATER-QUALITY DATA, WATER YEAR OCTOBER 2002 TO SEPTEMBER 2003
Date
ANC,
wat unf
fixed
end pt,
lab,
mg/L as
CaCO3
(90410)
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
on
evap.
at
180degC
wat flt
mg/L
(70300)
Ammonia
+
org-N,
water,
unfltrd
mg/L
as N
(00625)
Ammonia
water,
fltrd,
mg/L
as N
(00608)
Nitrite
+
nitrate
water
fltrd,
mg/L
as N
(00631)
Nitrite
water,
fltrd,
mg/L
as N
(00613)
Ortho-
phos-
phate,
water,
fltrd,
mg/L
as P
(00671)
MAY
15...
31
4.20
<0.2
4.02
4.8
49
0.08
59
0.30
0.040
0.092
0.003
<0.007
15...
32
1.72