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USGS Surface-Water 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 01580000 DEER CREEK AT ROCKS, MD


Harford County, Maryland
Hydrologic Unit Code 02050306
Latitude  39°37'47.9", Longitude  76°24'11.9" NAD83
Drainage area 94.4  square miles
Gage datum 249.59 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 1926-10-01 -> 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
1 162 135 156 186 163 136 112 93 103 107 105 114
2 147 143 156 192 150 153 102 99 83 103 98 108
3 163 165 167 181 156 131 111 93 76 85 105 107
4 147 153 176 167 161 140 110 117 85 80 92 122
5 125 142 194 186 158 152 127 94 79 76 90 126
6 130 149 177 188 190 140 101 83 112 79 85 117
7 123 185 166 176 165 121 116 87 101 73 91 117
8 119 154 158 174 156 123 118 82 107 105 109 122
9 155 132 165 168 155 116 101 93 93 80 105 120
10 138 135 175 171 145 124 107 107 92 86 99 112
11 124 142 185 153 144 121 103 88 101 90 90 139
12 124 166 175 162 157 121 104 100 97 79 98 131
13 119 174 179 175 158 139 138 133 85 75 113 129
14 151 173 193 165 144 139 117 86 85 80 105 128
15 138 157 176 184 145 123 113 80 76 77 99 118
16 129 153 158 202 158 109 94 76 103 80 132 133
17 119 152 157 177 154 112 86 109 96 81 119 126
18 136 145 154 157 152 113 97 109 95 86 99 134
19 166 156 166 156 153 117 101 88 79 99 94 110
20 168 150 162 168 144 116 92 79 74 87 104 116
21 157 155 196 152 142 119 101 81 79 99 103 143
22 131 167 197 167 145 186 106 92 92 90 104 117
23 124 171 183 158 150 136 130 136 100 102 105 120
24 157 192 183 157 148 127 104 103 84 86 97 119
25 181 183 161 157 139 110 99 88 97 85 124 135
26 200 203 174 175 151 112 95 82 99 99 108 161
27 152 183 173 172 133 129 92 93 102 95 101 124
28 151 172 180 175 143 127 101 92 98 99 135 133
29 135 158 172 153 137 116 88 78 89 114 126 124
30 137   177 177 137 108 92 70 116 110 119 128
31 139   172   132   85 87   88   117