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USGS Daily Statistics for Maryland

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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 01639000 MONOCACY RIVER AT BRIDGEPORT, MD


Frederick County, Maryland
Hydrologic Unit Code 02070009
Latitude  39°40'44.6", Longitude  77°14'04.3" NAD83
Drainage area 173  square miles
Gage datum 340.18 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 1941-10-01 -> 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
1 318 202 404 389 240 148 57 66 90 138 148 234
2 393 298 374 481 176 225 55 73 102 92 129 255
3 300 344 302 410 224 136 67 68 50 90 180 258
4 328 405 423 349 300 152 75 103 73 54 107 281
5 251 325 611 401 283 148 82 55 45 68 134 320
6 238 283 536 304 349 126 71 38 163 48 116 226
7 216 376 531 291 366 128 101 49 134 36 120 308
8 294 286 394 261 235 99 101 66 143 57 194 258
9 328 222 396 264 211 91 84 110 124 194 202 257
10 340 272 402 321 184 107 133 70 108 131 136 240
11 211 279 460 206 165 121 58 59 75 126 121 459
12 244 269 389 212 274 146 77 61 57 108 166 358
13 256 335 433 370 201 174 93 152 53 82 182 331
14 237 420 474 370 172 127 59 106 73 88 120 310
15 260 377 467 411 178 109 68 53 130 99 151 256
16 285 340 342 395 355 71 93 34 50 124 154 352
17 190 330 397 360 226 100 84 37 75 88 184 335
18 212 357 297 203 225 96 101 81 193 108 131 280
19 275 364 395 193 245 247 88 58 112 158 137 208
20 409 389 456 280 197 115 57 55 63 120 181 208
21 259 419 517 254 279 169 75 60 87 105 175 323
22 262 385 647 280 260 315 130 64 135 62 276 257
23 284 475 557 202 174 227 96 56 288 116 290 312
24 416 595 505 223 152 89 87 44 113 93 149 273
25 451 514 374 224 139 80 74 50 163 94 216 333
26 398 464 342 267 162 130 59 33 188 159 190 364
27 411 401 379 264 126 134 89 30 128 133 173 296
28 380 390 350 270 179 198 68 29 182 146 339 236
29 250 369 380 217 235 74 74 30 126 176 359 245
30 251   410 322 160 61 53 24 116 228 307 365
31 270   328   139   53 31   132   262