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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 03078000 CASSELMAN RIVER AT GRANTSVILLE, MD


Garrett County, Maryland
Hydrologic Unit Code 05020006
Latitude  39°42'07.9", Longitude  79°08'11.0" NAD83
Drainage area 64.2  square miles
Gage datum 2,088.56 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 1946-10-01 -> 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
1 205 165 263 268 147 99 56 40 49 35 59 140
2 204 166 230 291 145 99 43 44 30 38 61 128
3 186 178 216 267 158 102 51 35 21 39 61 131
4 170 177 284 258 183 104 76 35 22 40 69 137
5 183 170 348 248 192 94 52 38 21 37 92 127
6 155 174 308 225 191 110 54 68 42 34 77 124
7 150 183 248 233 188 106 45 40 49 33 76 156
8 148 178 233 215 194 87 50 34 34 34 83 153
9 141 173 226 236 187 80 60 43 77 49 73 162
10 154 180 244 229 181 86 74 37 48 43 69 165
11 162 183 260 203 176 79 68 31 30 42 74 163
12 179 178 260 224 173 74 50 47 31 37 98 158
13 162 183 313 239 166 90 63 43 38 32 82 150
14 143 182 298 212 152 83 51 31 48 33 70 150
15 154 184 281 219 157 67 49 31 32 69 73 153
16 152 196 234 218 173 71 39 26 32 61 91 154
17 139 182 234 205 155 74 38 35 45 40 87 147
18 144 211 224 175 182 74 32 49 49 43 78 153
19 186 236 240 168 164 65 50 38 60 42 89 146
20 157 210 273 166 149 75 39 40 38 41 99 140
21 138 227 281 155 138 86 34 48 47 43 92 149
22 128 218 271 163 124 68 36 41 57 41 103 149
23 146 245 253 164 126 92 47 42 42 49 98 156
24 187 255 288 175 126 88 39 32 33 59 92 158
25 206 262 253 184 116 65 33 24 41 49 93 169
26 207 224 236 170 110 51 29 20 42 44 111 162
27 182 206 235 160 112 63 34 23 44 49 111 151
28 182 228 263 169 123 61 29 31 54 49 149 136
29 179 232 268 169 116 52 58 24 40 73 142 142
30 183   256 169 94 48 40 26 41 66 123 161
31 171   251   104   46 32   62   165