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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 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 55 133 279 222 237 287 103 79 54 110 78
2 59 58 157 210 180 203 269 68 76 59 103 76
3 57 74 192 171 202 207 177 82 66 68 98 65
4 81 96 230 152 244 202 127 98 61 56 104 62
5 56 102 273 148 271 217 202 86 86 93 97 58
6 57 97 191 154 193 206 313 73 111 143 81 58
7 73 98 166 152 218 172 215 57 95 141 70 56
8 75 92 240 143 232 198 181 49 76 139 63 54
9 57 107 326 157 208 226 185 66 77 103 60 53
10 50 117 431 158 303 247 188 118 107 114 73 51
11 50 106 421 188 342 203 192 96 91 77 64 49
12 62 87 348 172 251 212 138 109 78 54 64 54
13 94 81 389 161 243 271 140 116 99 52 74 53
14 103 79 358 162 218 278 235 123 109 57 73 84
15 73 80 294 165 182 285 157 109 99 58 68 97
16 75 85 215 158 192 239 135 116 62 48 101 92
17 75 112 173 178 273 267 105 136 59 70 106 68
18 63 128 187 321 288 242 104 118 55 145 112 60
19 72 137 245 290 269 240 128 80 52 106 82 55
20 93 229 334 259 237 281 130 111 55 68 89 54
21 67 255 297 255 201 280 123 178 46 56 80 57
22 61 184 264 186 178 266 135 125 48 58 87 59
23 59 185 249 185 199 291 118 101 71 95 89 63
24 81 177 214 168 225 316 140 92 77 85 77 59
25 70 211 183 195 270 273 134 102 99 78 76 83
26 55 182 183 225 284 187 124 124 119 81 82 85
27 51 176 180 229 297 168 127 140 123 74 101 88
28 48 142 192 212 308 169 99 191 61 70 91 121
29 53 102 191 209 450 143 107 195 56 79 77 102
30 63   236 215 348 233 110 123 61 123 72 79
31 62   313   261   133 72   109   78