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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 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
1 321 203 408 393 243 148 57 66 90 138 149 236
2 396 301 378 486 176 225 55 73 102 92 131 258
3 303 347 304 414 224 136 67 68 50 90 182 261
4 331 409 427 352 300 152 75 103 73 54 108 284
5 254 329 618 404 283 148 82 55 45 68 135 324
6 240 285 538 298 349 126 71 38 163 48 117 229
7 218 376 536 288 366 128 101 49 134 36 121 311
8 297 288 398 260 235 99 101 66 143 57 196 260
9 331 223 400 265 211 91 84 110 124 194 204 260
10 344 274 406 323 184 107 133 70 108 131 138 242
11 213 281 465 206 165 121 58 59 75 126 122 460
12 247 271 392 212 274 146 77 61 57 108 168 353
13 258 337 438 372 201 174 93 152 53 82 184 333
14 240 421 479 373 172 127 59 106 73 88 121 313
15 263 380 472 415 178 109 68 53 130 99 152 258
16 288 337 346 399 355 71 93 34 50 124 155 355
17 192 322 399 363 226 100 84 37 75 88 186 336
18 214 359 299 204 225 96 101 81 193 108 132 281
19 278 367 398 194 245 247 88 58 112 158 139 209
20 414 392 461 283 197 115 57 55 63 120 183 209
21 262 423 522 257 279 169 75 60 87 105 177 325
22 265 389 654 282 260 315 130 64 135 62 279 259
23 288 480 563 204 174 227 96 56 288 116 293 315
24 421 601 510 225 152 89 87 44 113 94 150 276
25 456 519 378 226 139 80 74 50 163 95 218 336
26 403 468 345 269 162 130 59 33 188 161 192 367
27 416 405 383 266 126 134 89 30 128 135 175 299
28 384 393 353 273 179 198 68 29 182 148 343 238
29 252 369 384 219 235 74 74 30 126 178 362 247
30 253   414 326 160 61 53 24 116 231 310 368
31 272   331   139   53 31   133   264