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USGS Surface-Water 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 -> 2024-09-30)

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 67 55 137 288 226 238 291 102 80 54 111 79
2 59 59 162 213 179 204 272 67 77 60 104 77
3 57 75 197 168 189 208 172 82 67 69 99 66
4 83 98 237 152 243 203 124 99 62 56 104 62
5 57 104 277 149 274 218 199 86 87 94 97 59
6 59 99 192 156 194 207 313 73 112 145 78 58
7 74 100 169 155 220 173 215 57 97 144 69 56
8 77 93 245 145 235 199 180 49 77 142 63 54
9 58 108 335 160 210 228 185 66 79 105 60 53
10 51 119 445 161 309 250 188 119 108 116 74 51
11 50 108 434 193 350 205 193 97 93 78 64 50
12 63 89 359 177 256 214 139 110 79 55 64 54
13 96 82 402 164 248 274 141 117 101 53 74 54
14 106 81 369 166 219 282 237 124 111 58 73 87
15 75 81 302 170 182 289 158 109 100 59 68 100
16 77 87 221 162 194 242 133 116 63 49 102 94
17 77 114 177 182 279 271 103 138 60 72 107 69
18 64 131 192 330 294 245 103 119 55 147 114 61
19 74 141 252 298 272 243 128 81 53 108 82 56
20 96 236 345 265 236 283 130 112 55 69 89 55
21 69 262 306 245 194 278 123 181 47 57 80 58
22 62 189 273 182 174 268 136 127 48 59 88 61
23 61 190 256 183 198 294 119 103 72 97 90 64
24 84 181 220 168 217 320 140 93 78 87 78 60
25 72 216 188 197 258 276 135 104 100 79 77 85
26 56 186 189 228 281 189 125 126 121 83 83 87
27 52 181 185 233 296 169 128 142 125 75 102 90
28 49 145 198 215 309 171 100 194 62 71 92 124
29 54 109 197 211 454 144 103 198 56 80 78 103
30 64   243 219 351 235 108 124 62 125 73 79
31 63   324   263   133 72   111   79