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USGS Daily Statistics for the Nation

The statistics generated from this site are based on approved daily-mean data and may not match those published by the USGS in official publications. The user is responsible for assessment and use of statistics from this site. For more details on why the statistics may not match, click here.

USGS 14211550 JOHNSON CREEK AT MILWAUKIE, OR


Clackamas County, Oregon
Hydrologic Unit Code 17090012
Latitude  45°27'11", Longitude 122°38'31" NAD27
Drainage area 53.17  square miles
Gage datum 0.00 feet above NGVD29
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00060, Discharge, cubic feet per second,
Day of
month		 Mean of daily mean values for each day for water year of record in, ft3/s   (Calculation Period 1989-10-01 -> 2025-09-30)

Calculation period restricted by USGS staff due to special conditions at/near site
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1 163 158 151 92 57 37 24 18 18 29 86 134
2 177 130 135 85 58 40 22 17 18 25 59 150
3 194 109 143 88 59 42 22 17 18 24 48 158
4 152 108 131 78 57 43 21 17 18 25 55 143
5 134 125 114 80 63 44 21 18 18 24 62 141
6 151 161 115 78 57 39 21 18 21 22 70 137
7 151 158 117 91 57 37 20 18 19 22 85 160
8 144 156 103 100 55 36 20 18 19 23 64 163
9 148 146 117 88 52 38 22 17 18 29 55 146
10 171 96 127 88 50 44 21 17 18 34 53 175
11 158 93 106 94 48 61 20 18 18 32 88 172
12 161 101 109 86 43 39 19 18 19 27 91 163
13 180 92 129 86 42 36 19 17 18 29 92 157
14 157 93 123 83 49 33 19 17 19 29 73 175
15 155 113 153 94 48 32 19 17 24 30 76 129
16 169 141 127 86 48 32 18 17 21 29 70 131
17 179 149 111 81 66 32 20 18 24 31 89 149
18 214 153 103 75 65 30 19 18 29 38 100 137
19 196 159 100 68 55 29 19 18 24 33 151 120
20 178 160 94 70 49 32 19 18 23 36 133 179
21 155 144 94 63 47 28 18 18 20 36 103 152
22 143 119 105 63 53 27 19 19 18 44 112 131
23 137 136 101 77 49 26 19 19 19 35 111 122
24 149 157 100 79 44 28 18 19 22 37 143 148
25 142 131 103 72 44 26 18 21 21 34 144 138
26 122 111 90 68 40 26 18 19 21 38 125 138
27 126 116 96 71 40 26 18 18 21 59 105 189
28 138 134 96 67 39 24 18 18 24 47 113 199
29 159 163 114 61 39 25 18 18 26 50 108 200
30 175   110 66 36 23 18 20 30 51 123 192
31 182   90   39   18 18   74   167