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USGS Daily Statistics for the Nation

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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 05455100 Old Mans Creek near Iowa City, IA


Johnson County, Iowa
Hydrologic Unit Code 07080209
Latitude  41°36'23.06", Longitude  91°36'56.6" NAD83
Drainage area 201  square miles
Gage datum 637.32 feet above NAVD88
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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 1950-10-01 -> 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 66 55 133 279 222 234 283 106 79 54 110 78
2 59 58 157 210 180 201 265 71 75 59 103 76
3 57 74 192 171 202 205 175 84 65 68 98 65
4 81 96 230 152 244 200 126 99 61 56 104 62
5 56 102 273 148 271 215 199 87 85 93 97 58
6 57 97 191 154 193 203 309 74 109 143 81 58
7 73 98 166 152 218 170 214 58 94 141 70 56
8 75 92 240 143 232 195 179 50 75 139 63 54
9 57 107 326 157 208 223 183 66 77 103 60 53
10 50 117 431 158 303 244 185 120 105 114 73 51
11 50 106 421 188 342 201 192 99 90 77 64 49
12 62 87 348 172 251 209 156 118 77 54 64 54
13 94 81 389 161 243 267 146 123 98 52 74 53
14 103 79 358 162 218 274 235 125 108 57 73 84
15 73 80 294 165 182 281 158 110 97 58 68 97
16 75 85 215 158 192 235 135 116 62 48 101 92
17 75 112 173 178 273 263 106 136 58 70 106 68
18 63 128 187 321 288 239 104 117 54 145 112 60
19 72 137 245 290 266 237 128 80 51 106 82 55
20 93 229 334 259 235 277 136 111 54 68 89 54
21 67 255 297 255 203 276 135 176 46 56 80 57
22 61 184 264 186 179 262 138 124 48 58 87 59
23 59 185 249 185 199 287 120 101 71 95 89 63
24 81 177 214 168 223 312 140 91 77 85 77 59
25 70 211 183 195 268 269 134 102 99 78 76 83
26 55 182 183 225 281 185 124 123 119 81 82 85
27 51 176 180 229 293 166 129 139 123 74 101 88
28 48 142 192 212 304 168 100 188 61 70 91 121
29 53 102 191 209 443 142 108 192 56 79 77 102
30 63   236 215 343 229 118 121 61 123 72 79
31 62   313   258   142 72   109   78